I actually did find one of the solutions in my alternate evals table.
The score is +200 and the pv is:
Nf7 Qg3 Qxc7+ Qxc7 d6 Qb8 c5 Kb7 Nd8+ Ka6 Kc2 Qc8 Kd2 Qb8 Ke3 Qc8 Kxe4 Qb8 Be7 Qc8 Ke5 Qa8 Kf6 g5 hxg5 hxg5 Kxg5 Qc8 Kf6 Ka7 Kf7 Ka8 Ke8 Ka7 Bf8 Ka8 Ke7 Ka7 Ne6 Ka8 Nd4 Ka7 Nf3 Ka8 Ne5 Ka7 Nxd7 Qb7 Bg7 Ka6 Bf6 Ka7 Ke8 Qc8+ Bd8 Kb7 Nf6
For this position: [d]2k4N/Q1np4/2p2Bpp/1p1P4/pPP1p2P/P7/7q/1K6 w - -
So I am only missing the one.
Kornrade Test
Moderators: hgm, Rebel, chrisw
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Dann Corbit
- Posts: 12538
- Joined: Wed Mar 08, 2006 8:57 pm
- Location: Redmond, WA USA
Re: Kornrade Test
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
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lech
- Posts: 1136
- Joined: Sun Feb 14, 2010 10:02 pm
Re: Kornrade Test
It seems that there is a dual in 18 ???
[pgn][Event "StrateGems 2017; special honorable mention"] [Site ""] [Date "2017"] [Round ""] [White "Mihai Neghina (Romania)"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "6k1/1qr1p2p/ppN5/3p1N2/6p1/1P1P2Pp/PP2PP1P/2RK4 w - - 0 1"] [PlyCount "19"] [EventDate "2017"] [SourceDate "2017.05.21"] 1. Ncxe7 Kf8 2. Ng6 hxg6 3. Rxc7 Qxc7 4. Nd4 [/pgn]
Sting 11.3 shows:
[pgn][Event "StrateGems 2017; special honorable mention"] [Site ""] [Date "2017"] [Round ""] [White "Mihai Neghina (Romania)"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "6k1/1qr1p2p/ppN5/3p1N2/6p1/1P1P2Pp/PP2PP1P/2RK4 w - - 0 1"] [PlyCount "19"] [EventDate "2017"] [SourceDate "2017.05.21"] 1. Ncxe7+ Kf8 2. Rxc7 Qxc7 3. e3 {zugzwang ???} Qe5 4. Ng6 hxg6 5. Nd4[/pgn]
[pgn][Event "StrateGems 2017; special honorable mention"] [Site ""] [Date "2017"] [Round ""] [White "Mihai Neghina (Romania)"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "6k1/1qr1p2p/ppN5/3p1N2/6p1/1P1P2Pp/PP2PP1P/2RK4 w - - 0 1"] [PlyCount "19"] [EventDate "2017"] [SourceDate "2017.05.21"] 1. Ncxe7 Kf8 2. Ng6 hxg6 3. Rxc7 Qxc7 4. Nd4 [/pgn]
Sting 11.3 shows:
[pgn][Event "StrateGems 2017; special honorable mention"] [Site ""] [Date "2017"] [Round ""] [White "Mihai Neghina (Romania)"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "6k1/1qr1p2p/ppN5/3p1N2/6p1/1P1P2Pp/PP2PP1P/2RK4 w - - 0 1"] [PlyCount "19"] [EventDate "2017"] [SourceDate "2017.05.21"] 1. Ncxe7+ Kf8 2. Rxc7 Qxc7 3. e3 {zugzwang ???} Qe5 4. Ng6 hxg6 5. Nd4[/pgn]
Maybe, I can't be friendly, but let me be useful.
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Vinvin
- Posts: 5228
- Joined: Thu Mar 09, 2006 9:40 am
- Full name: Vincent Lejeune
Re: Kornrade Test
The 22 studies in PGN format :
[pgn][Event "White to move and win"] [Site "Glarean"] [Date "10.2009"] [Round "Constrictor"] [White "Mihai Neghina"] [Black "Peter Martan"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:19:59"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "3k4/2pq3p/pp5R/4P3/P6P/2PN4/1PN3K1/8 w - - 0 1"] [SetUp "1"] 1. Nd4! Qg7+ 2. Kh3! Qxh6 3. Nf4 Kc8 (3... Kd7 4. Nde6 Kc6 (4... Qxe6+ 5. Nxe6 Kxe6 6. Kg4 Kxe5 7. Kg5) (4... b5 5. a5 Kc6 6. h5 b4 7. c4 Kb7 8. Kg4 Kb8 9. Kf5 Kb7 10. Ke4 Kc6 11. b3 Kd7 12. Kd5) (4... c5 5. Kg3 Kc6 6. h5 a5 7. c4 Kd7 8. Kf3 Kc6 9. Ke4 Kb7 10. Kd5 Ka7 11. Kc6 Ka6 12. Kd6 Kb7 13. Kd7 Ka7 14. Kc7 Ka6 15. Kb8) (4... a5 5. h5 c6 6. Kg3 Kc8 7. Kf3 Kd7 8. Ke4 Kc8 9. c4 Kb8 10. Kd4 Ka7 11. c5 Ka6 12. Kc4 Ka7 13. cxb6+ Kxb6 14. Kd4 c5+ 15. Kd5 c4 16. Kxc4 Kc6 17. b4 axb4 18. Kxb4) 5. h5 b5 6. a5 Kd7 7. Kg3 c6 8. Kf3 Kc8 9. Ke4) 4. Nde6 Kb7 5. h5 c5 (5... c6 6. Kg3 Kc8 7. Kf3 Kb8 8. Ke4 a5 (8... Kb7 9. c4 Kb8 10. b4 Kc8 11. Kd4 Kb8 12. b5 Kb7 13. Ke4 a5 14. Kd4 cxb5 15. cxb5 Kc8 16. Ke4 Kb8 17. Kd5 Kb7 18. Kd6) 9. c4 Kc8 (9... Ka7 10. c5 bxc5 11. Kd3 Kb8 12. Kc4 Kc8 13. Kxc5) 10. Kd4 Kb7 11. c5 Ka7 12. Kc4 Ka6 13. cxb6 Kxb6 14. Kd4 c5+ 15. Kd5) (5... Kc6 6. Kg3 b5 7. a5 b4 8. c4 b3 9. Kf3 Kb7 10. Ke4 Kc8 11. Kd4) (5... a5 6. Kg4 Kc6 7. c4 Kb7 8. Kf5 c6 9. Ke4 b5 10. axb5 cxb5 11. c5 Kc6 12. Kd4 a4 13. Kc3) 6. Kg4 c4 (6... Kc6 7. Kf3 b5 (7... a5 8. c4) (7... Kd7 8. Ke3 Kc6 9. Ke4) 8. a5 c4 9. Ke4 b4 10. Kd4 Kb5 11. Kd5 bxc3 12. bxc3 Kxa5 13. Kxc4) (6... Kc6 7. Kf3) 7. Kf5 Kc6 8. Ke4 b5 9. axb5+ axb5 (9... Kxb5 10. Kd4 a5 11. Kd5 a4 12. Kd4 Kc6 13. Kxc4) 10. Kd4 Kb6 11. Kd5 Ka5 12. Kc5 Ka6 13. Kc6 Ka5 14. Kb7 b4 15. Kc6 bxc3 16. bxc3 Ka4 17. Kc5 Kb3 18. Kd4 Kc2 19. Kxc4 { 1-0 Black resigns. } 1-0 [Event "White to move and win"] [Site "Glarean"] [Date "12.2009"] [Round "Mirror"] [White "Mihai Neghina"] [Black "---"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:19:59"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "6Nk/pp2Np1p/2p2Pp1/2R2bP1/7K/P7/1q1n1Q2/5n2 w - - 0 1"] [SetUp "1"] 1. Rxf5 { The threat was 1.-- Nf3+ 2.Qxf3 Qh2+ 3.Qh3 Qxh3# } (1. Nxf5? Nf3+ 2. Qxf3 (2. Kg4?? Qxf2 { winning for Black }) 2... Qh2+ 3. Qh3 Qf4+ 4. Qg4 Qh2+ { draw }) 1... gxf5 2. Nh6 { Threatening Nxf7# } (2. Nxf5?? Qc1 3. Qf4 (3. Ngh6 Ne4 4. Qf3 Qxg5+ 5. Kh3 Nfd2 { winning for Black }) 3... Qe1+ 4. Kh3 Qe4 5. Qxe4 Nxe4 6. Ngh6 Nxg5+ { winning for Black }) 2... Nf3+ { Zwichenzug } 3. Kh5! (3. Qxf3? Qh2+ 4. Qh3 Qf2+ 5. Kh5 Qe2+ 6. Kh4 { draw }) 3... Qa2 { Queens attack each other, but neither can capture anything without allowing mate. Black only has pawn moves, while White can shuffle Qf7<>Qg7 indefinitely } 4. a4 { Passive defense 4.Qg2 may also work } (4. Qg2 b5 5. Qf2 a5 6. Qg2 b4 7. axb4 a4 8. b5 cxb5 { transposing to mainline }) 4... a5 (4... b6 5. Qg2 a6 6. Qf2 b5 7. a5! { The a-pawn must stay alive in this variation, it is vital for winning the game } 7... b4 8. Qg2 Qc4 9. Qxf3 Ng3+ 10. Qxg3 Qe2+ 11. Kh4 Qe4+ 12. Kh3 Qh1+ 13. Qh2 Qf3+ 14. Kh4 Qe4+ 15. Kh5 Qf3+ 16. Ng4 Qxg4+ 17. Kh6 f4 18. Qh1 b3 19. Nxc6 f3 20. Ne5 Qf5 21. Qxf3 Qxf3 22. Nxf3 b2 23. Nd2 Kg8 24. Nb1 { temporizing } 24... Kh8 25. Kh5 Kg8 26. Kg4 Kf8 27. Kf5 Ke8 28. Ke5 Kd7 29. Kd5 Kc7 30. Kc5 { winning for White }) 5. Qg2 b6 6. Qf2 b5 7. axb5 (7. Qg2 { Compared to the mainline, the long diagonal a8-h1 is still blocked, which is extremely important } 7... bxa4 8. Qf2 a3 9. Qg2 Qc4 10. Qxf3 Ng3+ 11. Qxg3 Qe2+ 12. Kh4 Qe4+ 13. Kh3 Qh1+ 14. Qh2 Qf3+ 15. Kh4 Qe4+ 16. Kh5 Qf3+ 17. Kh4 { draw } (17. Ng4?? Qxg4+ 18. Kh6 f4 19. Nxc6 a2 { winning for Black })) 7... cxb5 8. Qg2 a4 9. Qf2 a3 10. Qg2 b4 11. Qf2 { Finally, true zugzwang for Black } 11... Qb3 (11... Qc4 12. Qxf3 { winning for White }) 12. Qxf1 Nd2 13. Qg2 { threatens Qa8# } 13... Ne4 14. Nhxf5 a2 15. Qxe4 a1=Q { defends a8 } 16. Kh6! { thwarts the Qd1+ resource } (16. Nh4?? Qe6 17. Qb7 Qd1+ 18. Kh6 Qd8 { winning for Black }) 16... Qh3+ (16... Qe6 17. Qb7 Qc3 18. Qb8+ Qec8 19. Qxc8+ Qxc8 20. Nxc8 { winning for White }) 17. Nh4 { threatens Ng6 - Qe8# } 17... Qxh4+ 18. Qxh4 { winning for White } 1-0 [Event "White to move and win"] [Site "Glarean"] [Date "07.2010"] [Round "Walk"] [White "Mihai Neghina"] [Black "---"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:19:59"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "5B1q/3N3p/p3p2p/7k/B7/5PP1/K6P/8 w - - 0 1"] [SetUp "1"] 1. Ne5 Qxf8 (1... Qxe5 2. Be8+ Kg5 3. f4+ { winning for White }) 2. f4 (2. Bc6? Kg5 3. h4+ Kf5 4. Nd7 Qb4 5. Be4+ Qxe4 6. fxe4+ Kxe4 { draw }) 2... Qd8 { covering both e8 and d1 } 3. Bc6 (3. Bd7? { the bishop does not cover the important d5 square } 3... Qa5+ 4. Kb3 Qd5+ { draw because the king cannot advance to the 5th row and beyond }) (3. Bc2? Qa5+ 4. Kb2 Qb5+ 5. Kc1 Qc5 6. Kd2 Qa5+ 7. Ke3 Qc5+ { draw by perpetual,because the king can neither abandon the bishop, nor drive it to d1 }) (3. Kb2? { Also similar for 6.Ka3 and 6.Kb3 } 3... Qb6+ 4. Kc3 Qa5+ 5. Kb3 Qd5+ 6. Ka3 Qc5+ 7. Ka2 Qd5+ { draw by perpetual check, because the king can neither abandon the bishop, nor drive it to d1 }) 3... Qd2+ 4. Kb3 Qe3+ 5. Kc4 Qc1+ 6. Kb4 Qb2+ 7. Kc5 Qa3+ 8. Kb6 Qd6 9. Kb7 (9. Kxa6? Qa3+ 10. Kb7 Qa7+ 11. Kc8 Qc7+ 12. Kxc7 { Stalemate }) 9... Qe7+ 10. Kc8 Qf8+ 11. Kd7 Qg7+ 12. Kd8 { winning for White } 1-0 [Event "White to move and win"] [Site "Euxinus Pontus"] [Date "09.2010"] [Round "Detour"] [White "Mihai Neghina"] [Black "---"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:19:59"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "7q/b1p5/1p1Npkb1/pPP2ppP/P1P5/3B2P1/5P1R/K3R3 w - - 0 1"] [SetUp "1"] 1. hxg6! (1. Nb7? Ke7+ 2. Ka2 Qc3 { draw }) 1... Qxh2 2. Rxe6+! { double rook sacrifice } 2... Kxe6 3. g7 Qh1+ (3... Qh7 4. Bxf5+ { winning for White }) 4. Kb2 Qa8 5. Bxf5+ Kf6 6. Nc8 Kxg7 (6... Qxc8 7. Bxc8 Kxg7 8. c6 { winning for White }) 7. c6 Kf6 8. Bd7 Ke5 9. f3 Qb8 10. Kc3 Qa8 11. Kd3 Qb8 12. Ke3 Qa8 13. f4+ (13. Kf2 Qb8 14. Kg2 Qa8 15. Kh3 Qb8 16. Kg4 Kf6 17. f4 gxf4 18. Kxf4? { 18.gxf4 transposes to the mainline } 18... Qa8 19. g4 Qb8 20. g5+ Kg6 21. Bf5+ Kg7 { and the white king cannot reach d7 without passing through e6, thus leaving the knight undefended }) 13... gxf4+ 14. gxf4+ Kf6 15. Kf3 Qb8 16. Kg4 Kg6 17. f5+ Kf6 (17... Kh6 18. Kf4 Kg7 19. Ke5 { winning for White }) 18. Kh5 Qa8 19. Kh6 Qb8 20. Kh7 Kf7 21. Be6+ Kf6 (21... Kf8 22. Kg6 { winning for White }) 22. Kg8 Qa8 23. Kf8 Qb8 24. Ke8 Qa8 25. Kd8 Qb8 26. Kd7 { 1-0 Black resigns. } 1-0 [Event "White to move and draw"] [Site "Glarean"] [Date "03.2011"] [Round "Stubbornness"] [White "Mihai Neghina"] [Black "---"] [Result "1/2-1/2"] [UTCDate "2019.09.09"] [UTCTime "23:19:59"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "8/b4kp1/2p1p3/5pB1/p1PP4/1p6/3K1P2/3N4 w - - 0 1"] [SetUp "1"] 1. Kc3! (1. c5 a3 2. Kc3 a2 3. Kb2 e5 4. dxe5 Bxc5 5. Bd2 Bd4+ 6. Bc3 c5 { winning for Black }) (1. Kd3 e5 { winning for Black }) (1. Be3 f4 { winning for Black }) 1... Bxd4+ { decoy for the king } 2. Kxd4 (2. Kb4 b2 3. Nxb2 Bxb2 { winning for Black }) 2... b2 { sacrificing one pawn in order to promote the other } 3. Nxb2 { the king is still in the square of the a-pawn, but the knight is now blocking the path... } 3... a3 4. Nd3 { White can do nothing about the promotion, but can arrange for a stubborn defense } 4... a2 5. Ne5+ Ke8 6. f4 { All pieces are protected and the black king is confined to squares around h8... well, the queen cannot mate all by herself. } 1/2-1/2 [Event "White to move and win"] [Site "H.v.d.Heijden 50 JT"] [Date "03.2011"] [Round "Guard Change"] [White "Mihai Neghina"] [Black "---"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:19:59"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "2k4N/Q1np4/2p2Bpp/1p1P4/pPP1p2P/P7/7q/1K6 w - - 0 1"] [SetUp "1"] 1. Nf7 Qg3 2. Qxc7+! Qxc7 (2... Kxc7 3. Be5+ { winning for White }) 3. d6 Qb8 4. c5 Kb7 5. Nd8+ { First configuration of the guards: N+B } (5. Bd8? g5 { winning for Black }) 5... Ka8 6. Kc2 g5 { removing the white pawn } 7. hxg5 hxg5 8. Bxg5 Qc8 9. Kd2 e3+ 10. Kxe3 Ka7 11. Kf4 Ka8 12. Kf5 Ka7 13. Kg6 Ka8 14. Kf7 Ka7 15. Ke7 { Second configuration: N+K } 15... Ka8 16. Bh6 Ka7 17. Bf8 { Third configuration: B+K } 17... Ka8 (17... Kb8 18. Nf7 Qb7 19. Ne5 Kc8 20. Ke8 Qa7 21. Be7 Qb7 22. Bd8 Qa7 23. Bc7 { winning for White }) 18. Nf7 { This is the way of the knight extraction } 18... Ka7 19. Ne5 Ka6 20. Nxd7 { 1-0 Black resigns. } 1-0 [Event "White to move and draw"] [Site "Pat-a-Mat"] [Date "04.2019"] [Round "Blind Alley"] [White "Mihai Neghina"] [Black "Mário Kamody"] [Result "1/2-1/2"] [FEN "8/b7/3p2b1/5p1n/5Pk1/4P1p1/B5P1/R4K2 w - - 0 1"] 1. Ke2 (1. Bf7 Bxf7 2. Rxa7 Bc4+ {-+}) (1. Rd1 Bxe3 2. Rxd6 Nxf4 {-+}) 1... Bxe3 (1... Nxf4+ 2. exf4 Kxf4 3. Rh1 {==}) 2. Kxe3 Nxf4 3. Rg1 Nxg2+ 4. Rxg2 f4+ 5. Ke2 f3+ 6. Kf1 fxg2+ 7. Kg1 {(==) reaching the key position; the next ~10 moves are not forced, but are necessary for setting up the only try for Black: d5 } Be4 8. Bd5 Kf5 9. Bc6 Kf4 10. Bd5 Ke5 11. Bc6 Bd5 12. Bb7 Ke4 13. Bc8 Bc6 14. Be6 Ke5 15. Bb3 Bd7 16. Ba2 {!} (16. Kxg2 Kf4 {-+}) (16. Bc4 {or Bg8 or Bf7} Be6 17. Ba6 d5 {-+}) 16... Be6 17. Bb1 d5 {d5 is enforced, but...} (17... Kd4 18. Kxg2 {== since the bK went too far}) 18. Kxg2 {g2 can be taken now} Kf4 {the king covers g3} 19. Ba2 {! the bishop pins d5} Bg8 20. Bb3 {... and maintains the pin} Bf7 21. Ba2 {==} 1/2-1/2 [Event "White to move and win"] [Site "Componist"] [Date "01.2012"] [Round "Slowness"] [White "Mihai Neghina"] [Black "---"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:19:59"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "q7/b1p5/kp1p4/p2PN3/PPP5/1K6/8/5B2 w - - 0 1"] [SetUp "1"] 1. c5+ Kb7 (1... b5 2. Bxb5+ Kb7 3. Bc6+ Kc8 4. Bxa8 dxe5 5. Bc6 { winning for White }) 2. Ba6+! Kxa6 3. b5+ Kb7 4. c6+ Kc8 5. Nf7 Qb8 6. Kc4 Qa8 7. Kd4 Qb8 8. Ke4 Qa8 9. Kf5 Qb8 (9... Bb8 10. Ke6 Qa7 11. Ng5 Qa6 12. bxa6 b5 13. axb5 Ba7 14. Ne4 a4 15. Nc3 { winning for White, since the king can come back to hold in place the black a-pawn and the bishop, while the knight and white pawns can force a breakthrough. }) 10. Ke6 Qa8 11. Ng5 Kd8 12. Kf7 Qb8 13. Ne6+ Kc8 14. Ke8 Qa8 15. Ng7 Qb8 16. Nf5 Qa8 17. Ne7+ Kb8 18. Kd8 { zugzwang, winning for White } 1-0 [Event "White to move and draw"] [Site "chichitza.ro"] [Date "09.2012"] [Round "Standstill"] [White "Mihai Neghina"] [Black "---"] [Result "1/2-1/2"] [UTCDate "2019.09.09"] [UTCTime "23:20:00"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "1N4K1/1pp1p3/7k/2r3pP/p2pp1P1/P6N/8/2B5 w - - 0 1"] [SetUp "1"] 1. Nc6 { Sacrificing the knight only to displace the b-pawn on the c-column } (1. Na6 { is not aggressive enough, Black has time for Rxc1, winning }) (1. Nd7 Rxc1 { winning for Black }) (1. Bd2 Rd5 { the only way to win for Black } 2. Nc6 { now it is too late to get back to the mainline drawing idea } 2... bxc6 3. Nxg5 Rd8+ 4. Kf7 e3 { winning for Black }) 1... bxc6 { forced, otherwise mate at move 9: } (1... Rxc1 2. Nxe7 Rf1 3. Kh8 Rf8+ 4. Ng8+ Rxg8+ 5. Kxg8 e3 6. Ng1 d3 7. Nf3 d2 8. Ne5 d1=Q 9. Nf7#) (1... Rxc6 2. Bxg5# { is the threat that keeps the rook from taking the knight }) 2. Nxg5 Rxg5+ (2... Rxc1 3. Nf7#) 3. Kh8 { Black now has the awkward privilege of choosing whether he prefers to stalemate White by capturing the bishop or to be stalemated by White after having pushed all pawns in the diagonal of death c1-h6... draw } 1/2-1/2 [Event "White to move and draw"] [Site "Schach"] [Date "09.2012"] [Round "Shelter"] [White "Mihai Neghina"] [Black "---"] [Result "1/2-1/2"] [UTCDate "2019.09.09"] [UTCTime "23:20:00"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "4B3/k1K1pp2/p3bq2/2p1p3/1p2P1P1/4P2Q/nR6/8 w - - 0 1"] [SetUp "1"] 1. g5 (1. Rd2 Nc3 { winning for Black }) 1... Qxg5 2. Qxe6 (2. Qh8 Qf6 3. Rh2 (3. Qxf6 exf6 4. Rd2 b3 5. Rd8 Nc3 6. Bc6 Nb5+ 7. Bxb5 axb5 { winning for Black }) 3... Qxh8 4. Rxh8 Nc3 5. Bc6 Nb5+ 6. Bxb5 axb5 7. Rb8 b3 8. Rxb5 Ka6 9. Rxc5 Bg4 { winning for Black }) 2... fxe6 3. Rxa2 Qg8 (3... Qxe3 4. Bb5 Qa3 5. Rxa3 bxa3 6. Bc4 { winning for White }) 4. Ra4 { or Ra5, but keeping the a1 square cleared } (4. Ra1 Qf8 5. Ra5 Qf1 6. Bb5 Qxb5 7. Rxb5 axb5 { winning for Black }) 4... Qf8 5. Ra1 (5. Ra2 { or Ra5 } 5... Qf1 { winning for Black }) 5... b3 (5... c4 6. Ra4 c3 7. Rxb4 Qxe8 8. Rb7+ Ka8 9. Ra7+ Kxa7 { stalemate }) 6. Ra3 b2 7. Rb3 b1=Q 8. Rxb1 Qxe8 9. Rb7+ Ka8 10. Ra7+ Kxa7 { stalemate } 1/2-1/2 [Event "White to move and win"] [Site "chichitza.ro"] [Date "11.2012"] [Round "Chase"] [White "Mihai Neghina"] [Black "---"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:20:00"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "4N2k/4PB1p/7P/B1p5/2P5/3q2Pp/1P3P1K/2r5 w - - 0 1"] [SetUp "1"] 1. Bc3+ (1. Nc7? { or any other move } 1... Rh1+ 2. Kxh1 Qf3+ 3. Kh2 Qg2#) 1... Rxc3 (1... Qxc3 2. bxc3 { winning for White }) 2. Nc7! (2. Nd6? { or 2. Nf6? or 2.Ng7? } 2... Qxg3+ 3. fxg3 Rc2+ 4. Kxh3 (4. Kg1 h2+ 5. Kh1 Rc1+ 6. Kxh2 Rh1+) 4... Rh2+ 5. Kg4 Rh4+ { draw by perpetual check }) (2. bxc3? Qf1 { winning for Black }) 2... Qxg3+ (2... Qd7 { or Qe2 or Qe4 } 3. e8=Q+ Qxe8 4. Bxe8 { winning for White }) 3. fxg3 Rc2+ 4. Kxh3 Rh2+ 5. Kg4 Rh4+ 6. Kf5 Rf4+ (6... Rh5+ 7. Bxh5 Kg8 8. e8=R#) 7. Ke5 Re4+ 8. Kd5 (8. Kd6? Re6+ 9. Kd5 Rd6+ 10. Ke4 (10. Kxc5 Rc6+ { draw }) 10... Re6+ 11. Kf3 Rxe7 { draw }) 8... Re5+ 9. Kc6 Re6+ 10. Kb7 (10. Kxc5? Rc6+ { draw }) 10... Rb6+ 11. Kc8 Rb8+ 12. Kd7 { capturing the rook with checkmate or releasing the stalemate threat with a decisive advantage } 1-0 [Event "White to move and draw"] [Site "Componist"] [Date "12.2012"] [Round "Desperation"] [White "Mihai Neghina"] [Black "---"] [Result "1/2-1/2"] [UTCDate "2019.09.09"] [UTCTime "23:20:00"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "2b5/1pr4p/3bp1pk/1p6/1PpN2PP/K1P1n3/P3N1R1/3R4 w - - 0 1"] [SetUp "1"] 1. Nxb5 { Other moves lead to normal positions with Black being a pawn ahead. -+ } (1. Rgg1 Nxd1 2. Rxd1 Rf7 3. Nxb5 Bh2 { -+ }) (1. Rd2 Nxg2 2. Nxb5 e5 3. g5+ Kh5 { -+ }) (1. Rdg1 Nxg2 2. Rxg2 Bd7 { -+ }) (1. g5+ Kh5 2. Rdg1 Nxg2 { -+ }) 1... Nxd1 (1... Nxg2? 2. Rxd6 Re7 (2... Rg7 3. Na7 Bd7 4. Rb6 Be8 5. Nd4 { +- }) 3. Na7 Bd7 4. Rb6 Be8 5. Nd4 Nxh4 6. Nc8 Rc7 7. Nd6 Bc6 8. Nxe6 Re7 9. Nd4 Rd7 10. Nxc6 Rxd6 11. Rxb7 Rxc6 12. b5 { +- }) 2. Nxd6 (2. g5+? Kh5 3. Nxd6 Rc6 4. Nxb7 Bxb7 { -+ }) 2... b5 (2... e5 3. Rg1 Nf2 4. Rg2 Nd3 5. Ka4 { = }) (2... Rc6 3. Nf7+ Kg7 4. b5 Rb6 5. Kb4 Ne3 (5... Kxf7 6. Kc5 { +- }) 6. Rf2 { or Rg3 = }) (2... b6 3. Nxc8 Rxc8 4. Ka4 { = }) 3. g5+ { This move order does not work: } (3. Nxc8? Rxc8 4. g5+ Kg7 5. Nd4 Ra8#) 3... Kh5 (3... Kg7? 4. Ne8+ Kf7 5. Nxc7 { +- }) 4. Nxc8 { This move order does not work: } (4. Nf4+ Kxh4 5. Nxc8 e5 { -+ }) 4... Rxc8 5. Nf4+ Kxh4 6. Nxg6+ Kh3 7. Nf4+ Kh4 8. Ng6+ { Draw request 1: Knight checks } 8... hxg6 9. Rg4+ Kh3 10. Rg3+ Kh2 11. Rg2+ Kh1 12. Rg1+ Kh2 13. Rg2+ Kh3 14. Rg3+ Kh4 15. Rg4+ Kh5 16. Rh4+ Kxg5 17. Rg4+ { Draw request 2: Rook checks } (17. Rh5+? Kf4 18. Rf5+ Ke3 19. Re5+ Kf2 20. Rf5+ Ke2 21. Re5+ Ne3 { -+ }) 17... Kf6 18. Rf4+ (18. Rxg6+? Kf5 19. Rf6+ Kg4 20. Rg6+ Kf3 21. Rf6+ Ke2 22. Rxe6+ Ne3 { -+ }) 18... Kg7 (18... Ke7 19. Rf8 (19. Rf7+? Kd6 20. Rd7+ Ke5 21. Rd8 Nxc3 22. Rxc8 Kd4 { -+ }) 19... Rxf8 { stalemate } (19... Rc6 20. Re8+ Kf7 21. Rxe6 Rc8 22. Re8 Rc6 23. Re6 { = }) (19... g5 20. Rxc8 Nxc3 21. Kb2 Nd5 22. Rb8 g4 23. a3 c3+ 24. Kb3 Kf7 25. Rxb5 g3 26. Rb7+ Kf6 27. Rb8 Kf7 28. Rb7+ Kf6 { = }) (19... Nxc3 20. Rxc8 g5 { transposing to the previous variation = }) (19... Rc5 20. Rc8 Rd5 21. Re8+ Kf6 (21... Kd6 22. Rd8+ Ke5 23. Rxd5+ { = }) 22. Rxe6+ Kg5 23. Re5+ Kf4 24. Rxd5 Nxc3 25. Rd8 g5 26. Kb2 Na4+ 27. Kc2 g4 28. Rf8+ Ke4 29. Rb8 g3 30. Rxb5 g2 31. Rg5 Kf3 32. Rg8 Kf2 33. Rf8+ Kg3 34. Rg8+ Kh2 35. Rh8+ Kg1 36. Rg8 { = })) 19. Rf8 (19. Rf7+ { ? } 19... Kh6 20. Rf8 Rc6 21. Rh8+ Kg5 22. Rh5+ Kg4 23. Rg5+ Kf3 24. Rg3+ Ke2 25. Rg2+ Nf2 { -+ }) 19... Rc6 (19... Rc5 20. Rc8 { similar to a previous variation }) 20. Rg8+ (20. Rf7+? Kh6 21. Rh7+ Kg5 22. Rh5+ Kf4 23. Rf5+ Kg3 24. Rg5+ Kf3 25. Rf5+ Ke2 26. Re5+ Ne3 { -+ }) (20. Ra8? Nxc3 { -+ }) 20... Kf6 (20... Kh6 21. Rxg6+ { = }) 21. Rxg6+ Kf5 22. Rxe6 (22. Rf6+ { the same drawing idea } 22... Kg4 23. Rg6+ (23. Rf4+? Kg3 24. Rf3+ Kg2 25. Rg3+ Kf2 26. Rg2+ Kf3 27. Rg3+ Ke2 { -+ }) 23... Kf3 24. Rf6+ (24. Rg3+? Ke2 { -+ }) 24... Kg2 25. Rg6+ Kf1 26. Rxe6 (26. Rg1+ Ke2 27. Re1+ Kd3 28. Rxd1+ Kxc3 29. Rd6 { the same drawing idea }) 26... Rc7 27. Re7 Rc8 28. Re8 { repetition } 28... Rxe8 { or stalemate... }) 22... Rc7 23. Re7 Rc8 24. Re8 { Draw request 3: Rook versus Rook } 24... Rxe8 { stalemate... } 1/2-1/2 [Event "White to move and win"] [Site "9th WCCT (D39)"] [Date "09.2013"] [Round "Shield"] [White "Mihai Neghina"] [Black "Arpad Rusz"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:20:00"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "8/4Pr1N/8/6PN/8/3K1ppp/4prkb/4Bbnn w - - 0 1"] [SetUp "1"] 1. Nf8 { forcing the rook to the f8 square } (1. e8=Q Rd7+ { draw }) (1. N7f6 Rxf6 2. e8=Q Rd6+ { draw }) (1. g6 Rf5 2. Ng5 Rd5+ { draw }) (1. Kc2 Rf6 { draw }) 1... Rxf8 (1... Rf5 2. Kc3 { winning for White }) (1... Rf6 2. Ne6 Rf5 3. Nef4+ Rxf4 4. Nxf4#) 2. e8=Q { shielding the king from checks } (2. exf8=Q { stalemate }) (2. e8=N Rf6 3. Kc3 Rc6+ 4. Kb3 Rb6+ 5. Ka4 Ra6+ { draw }) 2... Rf7 3. Qe7 { shielding the king from checks } (3. Qc6 Rd7+ 4. Kc4 Rd4+ { draw }) 3... Rf6 4. Qe6 { shielding the king from checks } (4. Kc2 Rc6+ 5. Kb3 Rc4 { draw } (5... Rb6+ 6. Bb4 { winning for White }) (5... Rc3+ 6. Bxc3 { winning for White }) (5... Rf6 6. g6 { winning for White as in the mainline })) 4... Rf5 5. Qe5 { shielding the king from checks } 5... Rf8 6. Qd4 { shielding the king from checks } 6... Rf5 7. Kc3 { minor duals Kc2, Kc4 } 7... Rc5+ 8. Kb3 (8. Kb4 Rc4+ { draw }) 8... Rb5+ (8... Rc3+ 9. Bxc3 { winning for White }) 9. Ka4 Rf5 (9... Ra5+ 10. Bxa5 { winning for White }) 10. Qd8 { shortest path to mate } 10... Rf7 11. g6 Rf5 (11... Ra7+ 12. Ba5 { winning for White }) 12. Qg5 { Shielding the knight } 12... Rf8 13. g7 Rf5 14. g8=N { winning for White } 1-0 [Event "White to move and win"] [Site "EG"] [Date "02.2015"] [Round "Fork-field"] [White "Mihai Neghina"] [Black "---"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:20:00"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "3B2r1/n3Pp2/P7/5k1p/q3NP2/7K/5P2/4NB2 w - - 0 1"] [SetUp "1"] 1. Nf6 (1. Bd3 Qxe4 2. Bxe4+ Kxe4 { = }) (1. Ng3+ Ke6 2. Nd3 Qd4 3. Ne4 Rxd8 (3... Qxe4 4. Nc5+) 4. exd8=Q Qxd8 { -+ }) 1... Rh8 (1... Kxf6 2. e8=Q+ { #11 }) (1... Qd1 2. Bd3+ Ke6 3. f5+ Kd6 4. Nxg8 { +- }) (1... Re8 2. Nxe8 Qxe8 3. Kh2 { +- }) 2. Bd3+ (2. Nf3 Qa3 3. Kg2 Nc6 4. Nh4+ (4. e8=Q Rxe8 5. Nxe8 Nxd8 { -+ }) 4... Ke6 5. Bc4+ Kd6 6. Ne4+ Kd7 7. Bb5 Qc1 8. a7 Rg8+ 9. Ng3 Qa1 10. Nf5 Qxa7 11. Nh6 Rxd8 12. exd8=Q+ Kxd8 13. Bxc6 Qc7 14. Bf3 Qxf4 15. Ngf5 Qg5+ { -= }) (2. Be2 Qc6 3. Nf3 Qxf6 4. e8=Q Rxe8 5. Bd3+ Kxf4 6. Bxf6 Kxf3 { = }) (2. Bg2 Nc6 3. Be4+ Qxe4 4. Nxe4 Kxe4 { -= }) 2... Ke6 (2... Kxf6 3. e8=Q+ Kg7 4. Bf6+ Kxf6 5. Qe5#) (2... Kxf4 3. Bc7+ Kg5 4. Ne4+ Kh6 5. Bf4+ Kg7 6. Be5+ f6 (6... Kh6 7. Bxh8 { +- }) (6... Kh7 7. Nc3+ { fork +- }) 7. Bxf6+ Kf7 8. Bxh8 { +- }) 3. f5+ (3. Be4 Qxa6 4. Nf3 Qc8 5. f5+ Kd6 6. Ng5 Qc4 7. Bd5 Qd3+ 8. Kh2 Qxf5 9. Nxf7+ (9. Nge4+ Ke5 { = }) 9... Kc5 10. Nxh8 Qxf2+ { = }) (3. Nf3 Qxf4 4. Be4 Qxf6 5. e8=Q+ Rxe8 6. Ng5+ Qxg5 7. Bxg5 Kd7 { -= }) (3. e8=Q+ Rxe8 4. Nxe8 Qxe8 { -+ }) 3... Kd6 (3... Ke5 4. Nf3+ Kd6 5. Ne4+ Kc6 6. Ne5+ Kd5 7. Nc3+ Kxe5 8. Nxa4 { +- }) 4. Ne4+ (4. Nf3 Qa3 5. Be4 Nc8 6. a7 (6. e8=Q Rxe8 7. Nxe8+ Kd7 { -+ }) 6... Nxa7 { -= }) 4... Kc6 (4... Ke5 5. Bc7+ Kd4 (5... Kxf5 { or Kd5 } 6. Nc3+ { +- }) 6. Bb6+ Ke5 7. Nf3+ Kf4 (7... Kxf5 { or Kd5 } 8. Nc3+ { +- }) 8. Neg5 { or Nd2 #2 }) 5. Nc2 { The Black King and Queen are not individually dominated, but they chained together in a forkfield... } (5. Nf3 Qa3 6. Ne5+ Kd5 7. f4 Nc8 8. e8=Q (8. Nf6+ Kd4 9. a7 Nxe7 10. Bxe7 Qc1 { = }) (8. a7 Qxa7 { = }) 8... Rxe8 9. Nf6+ Kd4 10. Nxe8 Qc1 { = }) 5... h4 (5... Re8 6. Kg3 { if allowed, heading towards e3 to support the forkfield } 6... h4+ (6... Nc8 7. Bb5+ Kxb5 8. Nc3+ Kxa6 9. Nxa4 Nxe7 10. Bxe7 Rxe7 11. Nc3 Rc7 { (11...Re5 12. Ne3 +-) } 12. Nd5 { forkfield (II) +- }) 7. Kh3 Rh8 (7... Rg8 8. f4 Re8 9. Kxh4 { +- }) 8. f3 { +- }) (5... Rg8 6. f4 Rh8 7. Kh4 { +- }) (5... Kd7 6. Nc5+ { fork }) (5... Kd5 { or Kb5 } 6. Nc3+ { fork }) (5... Qxa6 { or Qa2 } 6. Nb4+ { fork }) (5... Qb5 { or Qb3 } 6. Nd4+ { fork }) 6. f3 { (Kh2 is unnecessary, leading back to the mainline some moves later) } (6. f4 f6 { Zugzwang White = }) (6. Kg2 h3+ 7. Kh2 f6 8. Kg1 (8. f3 { or f4 } 8... Qa2 { no fork = }) 8... Rg8+ 9. Kh1 Re8 10. Kh2 Rh8 { White cannot triangulate his way out of this... = }) (6. f6 Rg8 7. Kh2 (7. f3 Re8 8. f4 Rh8 { -+ }) 7... Rh8 { passive defense = }) 6... Re8 { (Rg8 is worse, losing a tempo for Black) } 7. f4 (7. Kxh4 Kd7 { no fork -= }) 7... Nc8 (7... Rh8 8. f6 Re8 9. Kxh4 Rg8 10. Kh3 Re8 11. Kg3 Rg8+ 12. Kf3 Re8 13. Nc3 { since the White king now blocks the queen's escape squares f/g/h4, Nc3 forces the Queen to move into the forkfield +- }) 8. Bb5+ Kxb5 9. Nc3+ Kxa6 10. Nxa4 Nxe7 11. Bxe7 Rxe7 12. Nc3 { ! } 12... Rc7 13. Nd5 { forkfield (II) secures both pawns and both knights; winning for White } 1-0 [Event "White to move and win"] [Site "Glarean"] [Date "10.2015"] [Round "Harassment"] [White "Mihai Neghina"] [Black "---"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:20:00"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "8/q1p1N1p1/3p1p1p/pk5P/1p2BB2/8/PK3P2/8 w - - 0 1"] [SetUp "1"] 1. Be3 (1. Bd3+ { ? } 1... Ka4 2. Be3 Qb7 3. Bg6 (3. Nf5 { ? } 3... b3 4. a3 Qd5 5. Nd4 c6 6. Be2 Qc5 7. Bd1 Qxa3+ { -+ }) 3... Kb5 4. Bd3+ Ka4 { = }) (1. Bc6+ { ? } 1... Kc4 2. Be3 Qb8 3. Bf3 { threatening Be2# } 3... Kd3 4. Ng6 { threatening Nf4+ Be2# } (4. Nd5 { similar to 4.Ng6 }) 4... Kc4 5. Ne7 { = } (5. Nf4 { ? } 5... Kb5 6. Be2+ Kc6 { -+ })) 1... c5 (1... Qb8 2. Bd3+ Ka4 3. Nc6 Qb7 4. Nd4 Qd5 5. Bc2+ b3 6. Bxb3+ { +- }) 2. Bd3+ (2. Bc6+ { ? } 2... Kc4 { -+ }) 2... Ka4 (2... Kb6 3. Nc8+ { +- }) (2... c4 3. Bxc4+ Kxc4 4. Bxa7) 3. Nd5 (3. Bc2+ { ? } 3... Kb5 (3... b3 { ? } 4. axb3+ Kb5 5. Bd3+ Kb6 6. Nc8+ { +- }) 4. Bd3+ Ka4 { = }) 3... Qb7 (3... f5 4. f4 Qb7 5. Bc4 Qb8 6. Bf2 Qd8 7. Bh4 Qb8 (7... Qxh4 8. Nb6#) 8. Be7 Qb7 9. Bd8 Qa7 10. Nc7 { +- }) (3... Qb8 { similar to 3...Qb7 }) 4. Bc4 Qb8 { Black's best defense is passive, trying not to create any weaknesses while the queen keeps b6 guarded. } 5. Bc1 { The bishop cannot break Black with sheer force (sacrifice), nor can he sneak around the defense. It's therefore the king's turn to attempt a siege. But in the meantime, a3 must be protected to keep the black king cornered and to prevent b3 breakthroughs. } (5. Bf4 Qd8 6. Bg3 Qb8 { keeping both b6 and d6 defended }) 5... Qd8 6. Kc2 (6. Kb1 Qb8 7. f3 Qd8 8. Nf4 Qc8 9. Nd3 Qf5 10. Ka1 Qxf3 11. Nb2+ Ka3 12. Be6 Qc3 13. Kb1 { +- }) 6... Qb8 7. Bb2 Qa7 8. f3 { defending g4 } (8. f4 { ? } 8... Qb8 9. Kd3 Qa7 10. Ke4 Qb8 11. Kf5 (11. Kf3 Qd8 12. Kg4 Qc8+ 13. Kg3 { = }) 11... Qc8+ 12. Kg6 Qb7 13. Kh7 { ? } 13... g5+ 14. Kxh6 g4 15. Kg6 g3 16. Bc1 (16. h6 g2 17. h7 g1=Q+ { -+ }) 16... g2 17. Be3 Qb8 18. Kg7 (18. Kf7 b3 19. axb3+ Ka3 20. h6 Qh8 21. f5 Qh7+ 22. Kxf6 g1=Q 23. Bxg1 Qxh6+ 24. Ke7 Qg7+ 25. Kxd6 Qxg1 26. f6 Qg3+ 27. Kxc5 a4 28. bxa4 Kxa4) 18... b3 19. axb3+ Ka3 20. h6 Qe8 21. h7 Qxe3 22. Nxe3 g1=Q+ 23. Kf7 Qh1 24. Kg7 Qg1+ 25. Kf7) (8. Kd3 { The king move is not terrible by itself, but without f3 it is a draw. } 8... Qb7 9. Ke4 Qb8 10. Kf4 Qd8 11. Kf5 Qc8+ 12. Kg6 Qg4+ 13. Kh7 Qxc4 14. Nb6+ Kb5 15. Nxc4 Kxc4 16. Kxg7 b3 17. axb3+ Kxb3 18. Bxf6 (18. Bc1 c4 19. Kxh6 c3 20. Kg6 a4 21. h6 a3 22. Bxa3 Kxa3 23. h7 c2 24. h8=Q c1=Q { = }) 18... d5 19. Kxh6 d4 20. Kg6 d3 21. Bg5 c4 22. h6 c3 23. h7 d2 24. h8=Q d1=Q { = }) 8... Qb7 9. Kd3 Qa7 10. Ke4 Qb7 11. Kf5 Qd7+ 12. Kg6 Qb7 13. Kh7 { the g5+ trick does not work, as the f-pawn can intercept } 13... Qa7 14. Kg8 Qb7 15. Kf8 Qa7 16. Ke8 Qb7 17. Kd8 Qa7 18. Kc8 Qa8+ 19. Kd7 Qb8 (19... Qb7+ 20. Nc7 b3 21. a3 Qb6 22. Nd5 { threatening Nc3# } 22... Qb5+ 23. Bxb5+ Kxb5 24. Kxd6 { +- }) 20. Nc7 b3 21. a3 Qb7 22. Bd5 Qxd5 23. Nxd5 Kb5 24. Kxd6 { 1-0 Black resigns. } 1-0 [Event "White to move and win"] [Site "Die Schwalbe"] [Date "12.2016"] [Round "Smothering"] [White "Mihai Neghina"] [Black "Michael Roxlau"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:20:00"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "6kq/2p4p/6P1/5nN1/K7/2P5/7B/3B4 w - - 0 1"] [SetUp "1"] 1. Bb3+ { ! } (1. g7 Nxg7 2. Bb3+ Ne6 { = } { ! }) 1... Kf8 2. g7+ { ! } 2... Nxg7 3. Nf7 Qg8 4. Nh6 Qh8 5. Be5 Ke7 6. Bg8 Kf8 (6... Qxg8 7. Nxg8+ Kf7 8. Nh6+ Kg6 9. Ng4 { +- }) 7. Bd4 { ! } (7. Kb5 Qxg8 { = }) 7... Ke8 (7... Qxg8 8. Bc5+ Ke8 9. Nxg8 { +- }) 8. Kb5 Kd7 9. Be5 { ! } (9. Kc5 Kc8 { ! } 10. Kc6 Kb8 { = }) 9... Ke8 (9... Kc8 10. Kc6 { +- }) 10. Kc6 Kf8 11. Bd4 { ! } 11... Qxg8 12. Bc5+ Ke8 13. Nxg8 { +- } 1-0 [Event "White to move and win"] [Site "?"] [Round "Smothering II"] [White "W"] [Black "B"] [Result "1-0"] [FEN "5k2/2p4p/6P1/1p3n2/3q4/PB4BN/KP5P/8 w - - 0 1"] 1. Ng5 (1. gxh7 {?} Qh8 2. Ng5 Nxg3 3. hxg3 (3. Bg8 Ne2 4. Nf7 Qd4 5. h8=Q Qc4+ 6. Ka1 Qc1+ {=}) 3... Ke7 4. Bg8 Qd4 5. Nf7 Qd5+ 6. Ka1 Qd1+ {=}) 1...Qh8 (1... Ke7 {or Ke8} 2. gxh7 {now gxhworks} Nxg3 3. Nf7 Ne2 4. h8=Q Nc1+ (4... Qxh8 5. Nxh8) 5. Kb1 Nxb3 6. Qxd4 Nxd4 7. Ne5 {it may take some time, butthere is an extra h-pawn}) 2. g7+ (2. gxh7 {?} Nxg3 {same draw as 1.gxh?}) (2.Nxh7+ Ke7 3. Bf4 b4 {=}) (2. Ne6+ Ke7 3. g7 Nxg7 4. Be5 c5 {=}) 2... Nxg7 (2... Qxg7 3. Ne6+) (2... Kxg7 3. Be5+) 3. Nf7 {the smothered matemanouver, applied to the queen} Qg8 4. Nh6 Qh8 5. Be5 Ke7 {or Ke8} 6. Bg8 Kd7 (6... Kf8 7. Kb3 Qxg8+ 8. Nxg8 Kxg8 9. Bxg7 {+-}) 7. Kb3 {the moves are not forced any more, they depend on how Black reacts or sets up a defensive posture, for instance:} Kc6 (7... c5 8.Kc3 Kc6 9. b4 c4 10. a4 bxa4 11. Kxc4) 8. Kb4 Kb6 9. Bd4+ Ka6 10. Be5 Kb6 (10... c6 11. Kc5 Ne6+ 12. Kd6 Ng7 13. Kxc6) 11. a4 bxa4 12. Kxa4 Ka6 13. Bd4 Kb7 14. Kb5 c6+ 15. Ka5 Kc7 16. Ka6 Kd7 17. Kb7 {zugzwang, +-} 1-0 [Event "White to move and draw"] [Site "ARVES/UAPA"] [Date "09.2017"] [Round "Fishing Rod"] [White "Mihai Neghina"] [Black "---"] [Result "1/2-1/2"] [UTCDate "2019.09.09"] [UTCTime "23:20:00"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "8/1B3b1p/7P/p2p4/P2pp1kp/Q7/1N1Pq2P/7K w - - 0 1"] [SetUp "1"] 1. Qh3+ { ! } (1. Bc8+ { ? } 1... Kh5 { -+ }) (1. h3+ { ? } 1... Kh5 { -+ }) (1. Qa1 { ? } 1... Kf3 { -+ }) 1... Kxh3 (1... Kg5 2. Qg2+ { = }) (1... Kf4 { ? } 2. Qxh4+ { +- }) 2. Bc8+ Qg4 3. Nd1 { ! } (3. Nd3 { ? } 3... exd3 { cannot sustain the stalemate threat }) 3... e3 4. d3 (4. dxe3 dxe3 5. Be6 d4 { tempo-losing move that breaks the bishop symmetry, -+ }) 4... Qxc8 (4... Bg6 5. Bf5 { = }) (4... Bh5 5. Be6 { = }) (4... Be8 5. Bd7 { = }) (4... Bg8 5. Be6 { = }) (4... Be6 5. Bxe6 { = }) 5. Nf2+ exf2 { stalemate } 1/2-1/2 [Event "White to move and draw"] [Site "StrateGems"] [Date "03.2017"] [Round "Castle"] [White "Mihai Neghina"] [Black "---"] [Result "1/2-1/2"] [UTCDate "2019.09.09"] [UTCTime "23:20:00"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "6k1/1qr1p2p/ppN5/3p1N2/6p1/1P1P2Pp/PP2PP1P/2RK4 w - - 0 1"] [SetUp "1"] { Inspired by V Chekover 1947 study (FEN: 7r/p3k3/2p5/1pPp4/3P4/PP4P1/3P1PB1/2K5 w - - 0 1) } 1. Ncxe7+ (1. b4 { ? } 1... Rxc6 2. Rxc6 Qd7 { -+ }) (1. Nfd4 e5 2. Nxe5 Rxc1+ 3. Kxc1 Qc8+ { followed by Qf8 -+ }) 1... Kf8 (1... Kh8 { same as mainline }) (1... Rxe7 2. Rc8+ Qxc8 (2... Kf7 3. Nd6+ { +- }) 3. Nxe7+ Kf7 4. Nxc8 { +- }) (1... Kf7 2. Nd6+ Kxe7 3. Nxb7 { +- }) 2. Ng6+ (2. Rxc7 Qxc7 3. Ng6+ Ke8 { -+ }) 2... hxg6 (2... Kg8 3. Nge7+ { = }) (2... Ke8 { or Kf7 } 3. Nd6+ { +- }) 3. Rxc7 (3. Nd4 Rxc1+ 4. Kxc1 Qf7 { -+ }) 3... Qxc7 4. Nd4 Qe5 5. e3 b5 6. a3 { White has reached the desired defensive position. This is not only a fortress, it is an entire castle... } (6. Kd2 { ? } 6... b4 { -+ }) 6... Kf7 7. Kd2 { any K move inside the headquarters E1-E2-D1-D2 is fine } (7. b4 { ? } 7... Qb8 8. Kd2 Qb6 9. Ke2 a5 10. bxa5 Qxa5 { -+ }) (7. a4 { ? } 7... bxa4 8. bxa4 Qb8 { -+ }) (7. Kc2 { ? } 7... Qf6 { -+ }) 7... Kg8 { If Black tries nothing, White does nothing } (7... Qf6 8. Ke2 { When the bQ is on the f-file, wK guards f2 by shuffling between Ke1 and Ke2; }) (7... Qc7 8. Kd1 { When the bQ is on the c-file, wK guards c1 by shuffling between Kd1 and Kd2; } 8... Qa5 9. Ke2 { When the bQ is on the a5-e1 diagonal, wK guards d2 and e1 by shuffling between Kd1 and Ke2; } (9. b4 { ? } 9... Qb6 { -+ })) (7... b4 8. a4 { ab blockade } 8... a5 9. Ke1 Qd6 10. Kd1 Qa6 11. Kd2 { When the bQ is on the a6-f1 diagonal, wK guards d3 by shuffling between Kd2 and Ke2; } (11. Kc2 { ? } 11... Qf6)) (7... Qb8 8. Kd1 a5 9. Kd2 a4 10. b4 { ab blockade } 10... Qb6 11. Kd1 Kf6 12. Kd2 Ke5 13. Kd1 Qxd4 14. exd4+ Kxd4 15. Kd2 { wK is always close enough to defend d3 }) 1/2-1/2 [Event "White to move and draw"] [Site "Probleemblad"] [Date "03.2017"] [Round "Evil Eye"] [White "Mihai Neghina"] [Black "---"] [Result "1/2-1/2"] [UTCDate "2019.09.09"] [UTCTime "23:20:00"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "8/pr1Pq3/br1kP3/1R2RQ2/5p2/1nPK4/5P2/8 w - - 0 1"] [SetUp "1"] 1. Qxf4 { preparing for a discovered check } (1. c4 { ? } 1... Rxb5 2. cxb5 Rxb5 3. Rxb5 Bxb5+ 4. Qxb5 Nc5+ 5. Kd2 Nxe6 { -+ }) (1. Rd5+ { ? } 1... Kc6 2. d8=Q Qxd8 3. Rxd8 Rxb5 4. Qe4+ Rd5+ 5. Kc2 Bd3+ 6. Qxd3 Rxd3 7. Rxd3 Nc5 { -+ }) (1. d8=Q+ { ? } 1... Qxd8 2. Rd5+ Kc6 { same as 1.Red5+ variation }) 1... Rxb5 (1... Rxd7 { ? } 2. Ke3 Rxb5 (2... Bxb5 3. exd7 Qxd7 4. Rxb5+ Ke7 (4... Kc6 5. Qc4+ Kb7 6. Rxb3 { += }) 5. Qh4+ { = }) 3. Rxb5+ Kc6 (3... Kxe6 4. Re5+ Kd6 5. Rxe7+ Kxe7 6. Qb4+ { +- }) 4. Qc4+ Kd6 5. Qf4+ Kc6 6. Qc4+ { = }) (1... Bxb5+ { ? } 2. Rxb5+ Kxe6 3. Qf5+ Kd6 4. d8=Q+ Qxd8 5. Rd5+ Kc7 6. Rxd8 Kxd8 7. Qf8+ { = }) 2. Rxb5+ Kxe6 (2... Kc6 { ? } 3. Qc4+ Qc5 4. Qe4+ Kc7 5. Qf4+ Kc6 6. Qe4+ { = }) 3. Qc4+ { interposition of the queen on the a6-d3 diagonal } (3. Qh6+ { ? } 3... Kxd7 4. Qxa6 Nc1+ 5. Kd4 Ne2+ 6. Kd3 Nf4+ 7. Kd4 Ne6+ 8. Kd3 Rxb5 9. Qxb5+ Kc7 { -+ }) 3... Kxd7 (3... Kf6 { ? } 4. Qf4+ { = }) 4. Rxb7+ Ke8 (4... Kd8 { ? } 5. Rb8+ Kd7 6. Rb7+ { same as before }) (4... Bxb7 { ? } 5. Qxb3 { wrong bishop = }) (4... Kd6 { ?? } 5. Qxa6+ { #6/0 }) 5. Rxe7+ (5. Rb8+ { ? } 5... Qd8+ 6. Rxd8+ Kxd8 { d8 is a better square for the bK than e7 } 7. f4 Bxc4+ 8. Kxc4 Nd2+ { -#36/0 }) (5. Rb5 { ? } 5... Nc5+ 6. Kc2 { or Kd4 } 6... Bxb5 7. Qxb5+ Kf8 { -+ }) (5. Qxa6 { ? } 5... Nc5+ 6. Kd4 (6. Kc4 Qe2+ 7. Kxc5 Qxa6 { -+ }) 6... Nxa6 7. Rxe7+ Kxe7 { -#36/0 }) 5... Kxe7 { Critical position for the distant opposition of bK and f-pawn } 6. f4 (6. Qxa6 { ? (too soon) } 6... Nc5+ 7. Kc4 Nxa6 { this (*) variation is a struggle of tempi and an unusual distant opposition between the Black King and the White f-pawn, -+ } 8. Kb5 Nc7+ { ! (unique moves marked with !) } (8... Nb8 9. f4 { or c4 = }) 9. Kc6 Ke8 (9... Ne8 10. Kb5 Nc7+ 11. Kc6 { unnecessary repetition }) (9... Kd8 10. f4 Ke7 11. f5 Kf6 12. Kxc7 a5 13. c4 a4 14. c5 a3 15. c6 a2 16. Kb8 { or Kb7 } 16... a1=Q 17. c7 { c-pawn draw }) 10. f4 (10. f3 Ke7 { ! (Kd8? leads to the c-pawn draw) } 11. f4 Kd8 { same variation but with extra move }) 10... Kd8 { ! } 11. f5 Ne8 { ! (Ke8 or Ke7 =) } 12. c4 (12. Kc5 Kd7 { -#32/0 }) 12... Kc8 { ! (Ke7 leads to the c-pawn draw) } 13. c5 Kd8 { ! (Nf6 Kb5 =) } 14. Kb5 Nc7+ { ! (Kc7 c6 =) } 15. Kc6 (15. Ka5 Ke7 { -#24/0 }) 15... a5 { -#23/0 }) (6. f3 { ? (too slow) } 6... Kd7 (6... Bxc4+ { ? } 7. Kxc4 { = }) 7. f4 { White has lost a tempo, -+ } 7... Bxc4+ 8. Kxc4 Nd2+ { ! } 9. Kb5 Kc7 { or Kc8 } 10. c4 Kb7 { ! } 11. c5 a6+ { ! } 12. Ka5 Nb3+ { ! } 13. Kb4 Nd4 { ! } 14. Kc4 Nf5 { -#30/0 }) 6... Ke8 (6... Bxc4+ { ? } 7. Kxc4 { = }) (6... Nc5+ { ? } 7. Kd4 Bxc4 8. Kxc5 { wrong colour bishop = } (8. Kxc4 { ? } 8... Na6 { -#37/0 })) (6... Nc1+ { ? } 7. Kc2 Bxc4 8. Kxc1 { wrong colour bishop = }) (6... Kd6 { ? } 7. Qxa6+) (6... Kd8 { ? } 7. Qxa6 Nc5+ 8. Kc4 Nxa6 { = }) (6... Kd7 { ? } 7. f5 Kd8 { or Ke7 or Ke8 or Kc7 or Kc8 } 8. Qxa6 Nc5+ 9. Kc4 Nxa6 { = }) 7. f5 (7. Qxa6 { ? (too soon) } 7... Nc5+ 8. Kc4 Nxa6 9. Kb5 Nc7+ 10. Kc6 Kd8 { -+, see * variation }) 7... Kd7 (7... Bxc4+ { ? } 8. Kxc4 { = }) (7... Kd8 { ? or Ke7? } 8. Qxa6 Nc5+ 9. Kc4 Nxa6 { = }) 8. f6 (8. Qxa6 { ? (too soon) } 8... Nc5+ 9. Kc4 Nxa6 10. Kb5 Nc7+ 11. Kc5 Ne8 { -+, see * variation }) 8... Kd8 (8... Bxc4+ { ? } 9. Kxc4 { += }) (8... Ke8 { ? } 9. Qxa6 Nc5+ 10. Kc4 Nxa6 { = }) 9. Qxa6 { !! } (9. f7 { ? } 9... Ke7 10. Qxa6 { ? (too late) } 10... Nc5+ 11. Kc4 Nxa6 12. Kb5 Nb8 { -#24/0 } (12... Nc7+ { ? } 13. Kc6 { = })) 9... Nc5+ 10. Kc4 Nxa6 11. Kb5 { with the pawn on f6, neither Nc7+ nor Nb8 work... } 11... Nc7+ (11... Nb8 12. c4 { or Kc5 = }) 12. Kc6 Ke8 13. f7+ Kf8 (13... Ke7 14. f8=Q+ Kxf8 { same as mainline }) 14. Kxc7 a5 15. c4 a4 16. c5 a3 17. c6 a2 18. Kb8 { or Kb7 } 18... a1=Q 19. c7 { c-pawn draw } 1/2-1/2 [Event "White to move and win"] [Site "Probleemblad"] [Date "03.2018"] [Round "Roundabout"] [White "Mihai Neghina"] [Black "---"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:20:00"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "4b3/5p2/2p4p/P1p1PN2/2pn2P1/P2k4/Pr1npKN1/B7 w - - 0 1"] [SetUp "1"] 1. Ne1+ (1. Bxb2 { ?? } 1... Ne4+ 2. Kg1 Nf3+ 3. Kh1 Nf2# { # }) 1... Kc3 (1... Ke4 2. Bxb2 Bd7 3. a6 Nb5 4. Nxh6 { +- }) 2. Ng3 (2. a6 { ? } 2... Ne4+ 3. Ke3 Nb5 4. Kxe4 Kd2 { -+ }) 2... Bd7 3. a6 Bc8 4. a7 Bb7 5. Kg2 (5. g5 { ? } 5... hxg5 6. Kg2 g4 { = }) 5... Ba8 6. Kh3 (6. g5 { minor dual }) (6. e6 { minor dual }) (6. Kh2 { or any other dark square where Black can check with a knight is losing -+ }) 6... Bb7 7. g5 (7. e6 { minor dual }) 7... hxg5 8. Kg4 Ba8 (8... Bc8+ 9. e6 { +- }) 9. Kh5 (9. e6 { ? } 9... f5+ { -+ }) (9. Kxg5 N2f3+ { -+ }) 9... Bb7 10. e6 fxe6 11. Kg6 Ba8 12. Kf6 { triangulation over f6 } (12. Kh7 { minor dual }) 12... Bb7 13. Kf7 Ba8 14. Ke8 Bb7 15. Kd7 Ba8 16. Kc8 { Zugzwang } 16... e5 (16... Bb7+ 17. Kb8 { +- }) 17. Kd7 Bb7 18. Ke8 Ba8 19. Kf7 Bb7 20. Kf6 Ba8 21. Kg6 Bb7 22. Kf7 Ba8 23. Ke8 Bb7 24. Kd7 Ba8 25. Kc8 { Zugzwang } 25... e4 (25... Bb7+ 26. Kb8 { +- }) 26. Kd7 Bb7 27. Ke8 Ba8 28. Kf7 Bb7 29. Kf6 Ba8 30. Kg6 Bb7 31. Kf7 Ba8 32. Ke8 Bb7 33. Kd7 Ba8 34. Kc8 { Zugzwang } 34... e3 (34... Bb7+ 35. Kb8 { +- }) 35. Kd7 Bb7 36. Ke8 Ba8 37. Kf7 Bb7 38. Kf6 Ba8 39. Kg6 Bb7 40. Kf7 Ba8 41. Ke8 Bb7 42. Kd7 Ba8 43. Kc8 { Zugzwang } 43... g4 (43... Bb7+ 44. Kb8 { +- }) 44. Kd7 Bb7 45. Ke8 Ba8 46. Kf7 Bb7 47. Kg6 { the g pawn must be eliminating before the final zugzwang, but it could not be eliminated before because it stood on a dark square that was indirectly guarded by ...Nf3+ } (47. Kf6 { ? } 47... Ba8 48. Kg6 Bb7 49. Kf7 Ba8 50. Ke8 Bb7 51. Kd7 Ba8 52. Kc8 Bb7+ 53. Kb8 Ba6+ 54. Bxb2+ Kxb2 55. a8=Q Bb5 { = }) 47... Ba8 48. Kh5 Bb7 49. Kxg4 Ba8 50. Kh5 Bb7 51. Kg6 Ba8 52. Kf6 Bb7 53. Kf7 Ba8 54. Ke8 Bb7 55. Kd7 Ba8 56. Kc8 { Zugzwang } 56... Bb7+ 57. Kb8 Ba6+ 58. Bxb2+ Kxb2 59. a8=Q { +- } 1-0 [Event "White to move and win"] [Site "Glarean"] [Date "01.2019"] [Round "Confusion"] [White "Mihai Neghina"] [Black "---"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:23:19"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "4q1kn/2Bp1p2/1N1PpPp1/1P2P1P1/2N3b1/6p1/1P4Pb/7K w - - 0 1"] [SetUp "1"] 1. Na5 (1. b4 { or other moves } 1... Bf5 2. Na5 Be4 { controlling b7; if the Nd8 fortress is not be completed, Nb6 cannot move out of the way of the pawn }) 1... Bf5 (1... Be2 2. Nb7 Bxb5 3. Nd8 Kh7 (3... Qf8 4. b3 Ba6 (4... Qh6 5. gxh6 Kh7 6. Na4 { +- }) 5. Na4 { +- }) 4. b3 { and continuing as in the mainline }) (1... Bd1 2. Nb7 Be2 3. Nd8 Bxb5 4. b3 { +- }) 2. Nb7 (2. b4 { ? } 2... Be4 { controlling b7 }) 2... Bd3 (2... Bc2 3. Nd8 Bb3 { attempting to dominate the Nb6 } 4. Nc8 { +- }) 3. Nd8 Bxb5 (3... Bf1 4. b3 { +- }) 4. b3 (4. b4 { ? } 4... Kh7 5. Nc8 Kg8 6. Na7 Ba6 7. b5 Bb7 8. b6 Ba6 9. Nb5 Bxb5 10. b7 { White promotes, but cannot win… }) 4... Bd3 (4... Kh7 5. Na4 { +- } (5. Nc4 { ? } 5... Bxc4 6. bxc4 { = })) (4... Qf8 5. Na4 Qh6 6. gxh6 g5 7. Bb6 Ng6 8. h7+ Kxh7 9. Nxf7 { +- }) 5. Na4 Bc2 6. Nc5 Bd1 7. b4 Be2 8. Nb3 Kh7 9. Nd4 Bc4 10. b5 Kg8 11. b6 Bd5 12. Ne2 Kh7 13. Nc1 Kg8 (13... Be4 14. Nb3 Bd5 15. Nc5 { and continuing as in the mainline }) 14. Nd3 Kh7 15. Nc5 Kg8 16. b7 Bxb7 17. Ncxb7 { and now the freeing of the king } 17... Kh7 18. Nc5 (18. Bb6 Kg8 19. Bg1 { also wins }) 18... Qf8 19. Nd3 Kg8 20. Ne1 Qe8 21. Nf3 Kh7 22. Nxh2 gxh2 23. Kxh2 Qf8 24. Kg3 Qg8 25. Kf3 Qe8 26. Ke4 Qg8 27. Kd4 Qf8 28. Kc5 Kg8 29. Kb6 Kh7 30. Kb7 Qe8 31. Bb6 (31. Kc8 { also wins } 31... Kg8 32. Bb8 Kh7 33. Kc7 Kg8 34. Nb7 Kh7 35. Nc5 { followed by Nxd7 }) 31... Kg8 32. Nc6 Kh7 33. Nb8 Kg8 34. Kc7 Kh7 35. Nxd7 { +- } 1-0 [/pgn]
[pgn][Event "White to move and win"] [Site "Glarean"] [Date "10.2009"] [Round "Constrictor"] [White "Mihai Neghina"] [Black "Peter Martan"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:19:59"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "3k4/2pq3p/pp5R/4P3/P6P/2PN4/1PN3K1/8 w - - 0 1"] [SetUp "1"] 1. Nd4! Qg7+ 2. Kh3! Qxh6 3. Nf4 Kc8 (3... Kd7 4. Nde6 Kc6 (4... Qxe6+ 5. Nxe6 Kxe6 6. Kg4 Kxe5 7. Kg5) (4... b5 5. a5 Kc6 6. h5 b4 7. c4 Kb7 8. Kg4 Kb8 9. Kf5 Kb7 10. Ke4 Kc6 11. b3 Kd7 12. Kd5) (4... c5 5. Kg3 Kc6 6. h5 a5 7. c4 Kd7 8. Kf3 Kc6 9. Ke4 Kb7 10. Kd5 Ka7 11. Kc6 Ka6 12. Kd6 Kb7 13. Kd7 Ka7 14. Kc7 Ka6 15. Kb8) (4... a5 5. h5 c6 6. Kg3 Kc8 7. Kf3 Kd7 8. Ke4 Kc8 9. c4 Kb8 10. Kd4 Ka7 11. c5 Ka6 12. Kc4 Ka7 13. cxb6+ Kxb6 14. Kd4 c5+ 15. Kd5 c4 16. Kxc4 Kc6 17. b4 axb4 18. Kxb4) 5. h5 b5 6. a5 Kd7 7. Kg3 c6 8. Kf3 Kc8 9. Ke4) 4. Nde6 Kb7 5. h5 c5 (5... c6 6. Kg3 Kc8 7. Kf3 Kb8 8. Ke4 a5 (8... Kb7 9. c4 Kb8 10. b4 Kc8 11. Kd4 Kb8 12. b5 Kb7 13. Ke4 a5 14. Kd4 cxb5 15. cxb5 Kc8 16. Ke4 Kb8 17. Kd5 Kb7 18. Kd6) 9. c4 Kc8 (9... Ka7 10. c5 bxc5 11. Kd3 Kb8 12. Kc4 Kc8 13. Kxc5) 10. Kd4 Kb7 11. c5 Ka7 12. Kc4 Ka6 13. cxb6 Kxb6 14. Kd4 c5+ 15. Kd5) (5... Kc6 6. Kg3 b5 7. a5 b4 8. c4 b3 9. Kf3 Kb7 10. Ke4 Kc8 11. Kd4) (5... a5 6. Kg4 Kc6 7. c4 Kb7 8. Kf5 c6 9. Ke4 b5 10. axb5 cxb5 11. c5 Kc6 12. Kd4 a4 13. Kc3) 6. Kg4 c4 (6... Kc6 7. Kf3 b5 (7... a5 8. c4) (7... Kd7 8. Ke3 Kc6 9. Ke4) 8. a5 c4 9. Ke4 b4 10. Kd4 Kb5 11. Kd5 bxc3 12. bxc3 Kxa5 13. Kxc4) (6... Kc6 7. Kf3) 7. Kf5 Kc6 8. Ke4 b5 9. axb5+ axb5 (9... Kxb5 10. Kd4 a5 11. Kd5 a4 12. Kd4 Kc6 13. Kxc4) 10. Kd4 Kb6 11. Kd5 Ka5 12. Kc5 Ka6 13. Kc6 Ka5 14. Kb7 b4 15. Kc6 bxc3 16. bxc3 Ka4 17. Kc5 Kb3 18. Kd4 Kc2 19. Kxc4 { 1-0 Black resigns. } 1-0 [Event "White to move and win"] [Site "Glarean"] [Date "12.2009"] [Round "Mirror"] [White "Mihai Neghina"] [Black "---"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:19:59"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "6Nk/pp2Np1p/2p2Pp1/2R2bP1/7K/P7/1q1n1Q2/5n2 w - - 0 1"] [SetUp "1"] 1. Rxf5 { The threat was 1.-- Nf3+ 2.Qxf3 Qh2+ 3.Qh3 Qxh3# } (1. Nxf5? Nf3+ 2. Qxf3 (2. Kg4?? Qxf2 { winning for Black }) 2... Qh2+ 3. Qh3 Qf4+ 4. Qg4 Qh2+ { draw }) 1... gxf5 2. Nh6 { Threatening Nxf7# } (2. Nxf5?? Qc1 3. Qf4 (3. Ngh6 Ne4 4. Qf3 Qxg5+ 5. Kh3 Nfd2 { winning for Black }) 3... Qe1+ 4. Kh3 Qe4 5. Qxe4 Nxe4 6. Ngh6 Nxg5+ { winning for Black }) 2... Nf3+ { Zwichenzug } 3. Kh5! (3. Qxf3? Qh2+ 4. Qh3 Qf2+ 5. Kh5 Qe2+ 6. Kh4 { draw }) 3... Qa2 { Queens attack each other, but neither can capture anything without allowing mate. Black only has pawn moves, while White can shuffle Qf7<>Qg7 indefinitely } 4. a4 { Passive defense 4.Qg2 may also work } (4. Qg2 b5 5. Qf2 a5 6. Qg2 b4 7. axb4 a4 8. b5 cxb5 { transposing to mainline }) 4... a5 (4... b6 5. Qg2 a6 6. Qf2 b5 7. a5! { The a-pawn must stay alive in this variation, it is vital for winning the game } 7... b4 8. Qg2 Qc4 9. Qxf3 Ng3+ 10. Qxg3 Qe2+ 11. Kh4 Qe4+ 12. Kh3 Qh1+ 13. Qh2 Qf3+ 14. Kh4 Qe4+ 15. Kh5 Qf3+ 16. Ng4 Qxg4+ 17. Kh6 f4 18. Qh1 b3 19. Nxc6 f3 20. Ne5 Qf5 21. Qxf3 Qxf3 22. Nxf3 b2 23. Nd2 Kg8 24. Nb1 { temporizing } 24... Kh8 25. Kh5 Kg8 26. Kg4 Kf8 27. Kf5 Ke8 28. Ke5 Kd7 29. Kd5 Kc7 30. Kc5 { winning for White }) 5. Qg2 b6 6. Qf2 b5 7. axb5 (7. Qg2 { Compared to the mainline, the long diagonal a8-h1 is still blocked, which is extremely important } 7... bxa4 8. Qf2 a3 9. Qg2 Qc4 10. Qxf3 Ng3+ 11. Qxg3 Qe2+ 12. Kh4 Qe4+ 13. Kh3 Qh1+ 14. Qh2 Qf3+ 15. Kh4 Qe4+ 16. Kh5 Qf3+ 17. Kh4 { draw } (17. Ng4?? Qxg4+ 18. Kh6 f4 19. Nxc6 a2 { winning for Black })) 7... cxb5 8. Qg2 a4 9. Qf2 a3 10. Qg2 b4 11. Qf2 { Finally, true zugzwang for Black } 11... Qb3 (11... Qc4 12. Qxf3 { winning for White }) 12. Qxf1 Nd2 13. Qg2 { threatens Qa8# } 13... Ne4 14. Nhxf5 a2 15. Qxe4 a1=Q { defends a8 } 16. Kh6! { thwarts the Qd1+ resource } (16. Nh4?? Qe6 17. Qb7 Qd1+ 18. Kh6 Qd8 { winning for Black }) 16... Qh3+ (16... Qe6 17. Qb7 Qc3 18. Qb8+ Qec8 19. Qxc8+ Qxc8 20. Nxc8 { winning for White }) 17. Nh4 { threatens Ng6 - Qe8# } 17... Qxh4+ 18. Qxh4 { winning for White } 1-0 [Event "White to move and win"] [Site "Glarean"] [Date "07.2010"] [Round "Walk"] [White "Mihai Neghina"] [Black "---"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:19:59"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "5B1q/3N3p/p3p2p/7k/B7/5PP1/K6P/8 w - - 0 1"] [SetUp "1"] 1. Ne5 Qxf8 (1... Qxe5 2. Be8+ Kg5 3. f4+ { winning for White }) 2. f4 (2. Bc6? Kg5 3. h4+ Kf5 4. Nd7 Qb4 5. Be4+ Qxe4 6. fxe4+ Kxe4 { draw }) 2... Qd8 { covering both e8 and d1 } 3. Bc6 (3. Bd7? { the bishop does not cover the important d5 square } 3... Qa5+ 4. Kb3 Qd5+ { draw because the king cannot advance to the 5th row and beyond }) (3. Bc2? Qa5+ 4. Kb2 Qb5+ 5. Kc1 Qc5 6. Kd2 Qa5+ 7. Ke3 Qc5+ { draw by perpetual,because the king can neither abandon the bishop, nor drive it to d1 }) (3. Kb2? { Also similar for 6.Ka3 and 6.Kb3 } 3... Qb6+ 4. Kc3 Qa5+ 5. Kb3 Qd5+ 6. Ka3 Qc5+ 7. Ka2 Qd5+ { draw by perpetual check, because the king can neither abandon the bishop, nor drive it to d1 }) 3... Qd2+ 4. Kb3 Qe3+ 5. Kc4 Qc1+ 6. Kb4 Qb2+ 7. Kc5 Qa3+ 8. Kb6 Qd6 9. Kb7 (9. Kxa6? Qa3+ 10. Kb7 Qa7+ 11. Kc8 Qc7+ 12. Kxc7 { Stalemate }) 9... Qe7+ 10. Kc8 Qf8+ 11. Kd7 Qg7+ 12. Kd8 { winning for White } 1-0 [Event "White to move and win"] [Site "Euxinus Pontus"] [Date "09.2010"] [Round "Detour"] [White "Mihai Neghina"] [Black "---"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:19:59"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "7q/b1p5/1p1Npkb1/pPP2ppP/P1P5/3B2P1/5P1R/K3R3 w - - 0 1"] [SetUp "1"] 1. hxg6! (1. Nb7? Ke7+ 2. Ka2 Qc3 { draw }) 1... Qxh2 2. Rxe6+! { double rook sacrifice } 2... Kxe6 3. g7 Qh1+ (3... Qh7 4. Bxf5+ { winning for White }) 4. Kb2 Qa8 5. Bxf5+ Kf6 6. Nc8 Kxg7 (6... Qxc8 7. Bxc8 Kxg7 8. c6 { winning for White }) 7. c6 Kf6 8. Bd7 Ke5 9. f3 Qb8 10. Kc3 Qa8 11. Kd3 Qb8 12. Ke3 Qa8 13. f4+ (13. Kf2 Qb8 14. Kg2 Qa8 15. Kh3 Qb8 16. Kg4 Kf6 17. f4 gxf4 18. Kxf4? { 18.gxf4 transposes to the mainline } 18... Qa8 19. g4 Qb8 20. g5+ Kg6 21. Bf5+ Kg7 { and the white king cannot reach d7 without passing through e6, thus leaving the knight undefended }) 13... gxf4+ 14. gxf4+ Kf6 15. Kf3 Qb8 16. Kg4 Kg6 17. f5+ Kf6 (17... Kh6 18. Kf4 Kg7 19. Ke5 { winning for White }) 18. Kh5 Qa8 19. Kh6 Qb8 20. Kh7 Kf7 21. Be6+ Kf6 (21... Kf8 22. Kg6 { winning for White }) 22. Kg8 Qa8 23. Kf8 Qb8 24. Ke8 Qa8 25. Kd8 Qb8 26. Kd7 { 1-0 Black resigns. } 1-0 [Event "White to move and draw"] [Site "Glarean"] [Date "03.2011"] [Round "Stubbornness"] [White "Mihai Neghina"] [Black "---"] [Result "1/2-1/2"] [UTCDate "2019.09.09"] [UTCTime "23:19:59"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "8/b4kp1/2p1p3/5pB1/p1PP4/1p6/3K1P2/3N4 w - - 0 1"] [SetUp "1"] 1. Kc3! (1. c5 a3 2. Kc3 a2 3. Kb2 e5 4. dxe5 Bxc5 5. Bd2 Bd4+ 6. Bc3 c5 { winning for Black }) (1. Kd3 e5 { winning for Black }) (1. Be3 f4 { winning for Black }) 1... Bxd4+ { decoy for the king } 2. Kxd4 (2. Kb4 b2 3. Nxb2 Bxb2 { winning for Black }) 2... b2 { sacrificing one pawn in order to promote the other } 3. Nxb2 { the king is still in the square of the a-pawn, but the knight is now blocking the path... } 3... a3 4. Nd3 { White can do nothing about the promotion, but can arrange for a stubborn defense } 4... a2 5. Ne5+ Ke8 6. f4 { All pieces are protected and the black king is confined to squares around h8... well, the queen cannot mate all by herself. } 1/2-1/2 [Event "White to move and win"] [Site "H.v.d.Heijden 50 JT"] [Date "03.2011"] [Round "Guard Change"] [White "Mihai Neghina"] [Black "---"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:19:59"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "2k4N/Q1np4/2p2Bpp/1p1P4/pPP1p2P/P7/7q/1K6 w - - 0 1"] [SetUp "1"] 1. Nf7 Qg3 2. Qxc7+! Qxc7 (2... Kxc7 3. Be5+ { winning for White }) 3. d6 Qb8 4. c5 Kb7 5. Nd8+ { First configuration of the guards: N+B } (5. Bd8? g5 { winning for Black }) 5... Ka8 6. Kc2 g5 { removing the white pawn } 7. hxg5 hxg5 8. Bxg5 Qc8 9. Kd2 e3+ 10. Kxe3 Ka7 11. Kf4 Ka8 12. Kf5 Ka7 13. Kg6 Ka8 14. Kf7 Ka7 15. Ke7 { Second configuration: N+K } 15... Ka8 16. Bh6 Ka7 17. Bf8 { Third configuration: B+K } 17... Ka8 (17... Kb8 18. Nf7 Qb7 19. Ne5 Kc8 20. Ke8 Qa7 21. Be7 Qb7 22. Bd8 Qa7 23. Bc7 { winning for White }) 18. Nf7 { This is the way of the knight extraction } 18... Ka7 19. Ne5 Ka6 20. Nxd7 { 1-0 Black resigns. } 1-0 [Event "White to move and draw"] [Site "Pat-a-Mat"] [Date "04.2019"] [Round "Blind Alley"] [White "Mihai Neghina"] [Black "Mário Kamody"] [Result "1/2-1/2"] [FEN "8/b7/3p2b1/5p1n/5Pk1/4P1p1/B5P1/R4K2 w - - 0 1"] 1. Ke2 (1. Bf7 Bxf7 2. Rxa7 Bc4+ {-+}) (1. Rd1 Bxe3 2. Rxd6 Nxf4 {-+}) 1... Bxe3 (1... Nxf4+ 2. exf4 Kxf4 3. Rh1 {==}) 2. Kxe3 Nxf4 3. Rg1 Nxg2+ 4. Rxg2 f4+ 5. Ke2 f3+ 6. Kf1 fxg2+ 7. Kg1 {(==) reaching the key position; the next ~10 moves are not forced, but are necessary for setting up the only try for Black: d5 } Be4 8. Bd5 Kf5 9. Bc6 Kf4 10. Bd5 Ke5 11. Bc6 Bd5 12. Bb7 Ke4 13. Bc8 Bc6 14. Be6 Ke5 15. Bb3 Bd7 16. Ba2 {!} (16. Kxg2 Kf4 {-+}) (16. Bc4 {or Bg8 or Bf7} Be6 17. Ba6 d5 {-+}) 16... Be6 17. Bb1 d5 {d5 is enforced, but...} (17... Kd4 18. Kxg2 {== since the bK went too far}) 18. Kxg2 {g2 can be taken now} Kf4 {the king covers g3} 19. Ba2 {! the bishop pins d5} Bg8 20. Bb3 {... and maintains the pin} Bf7 21. Ba2 {==} 1/2-1/2 [Event "White to move and win"] [Site "Componist"] [Date "01.2012"] [Round "Slowness"] [White "Mihai Neghina"] [Black "---"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:19:59"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "q7/b1p5/kp1p4/p2PN3/PPP5/1K6/8/5B2 w - - 0 1"] [SetUp "1"] 1. c5+ Kb7 (1... b5 2. Bxb5+ Kb7 3. Bc6+ Kc8 4. Bxa8 dxe5 5. Bc6 { winning for White }) 2. Ba6+! Kxa6 3. b5+ Kb7 4. c6+ Kc8 5. Nf7 Qb8 6. Kc4 Qa8 7. Kd4 Qb8 8. Ke4 Qa8 9. Kf5 Qb8 (9... Bb8 10. Ke6 Qa7 11. Ng5 Qa6 12. bxa6 b5 13. axb5 Ba7 14. Ne4 a4 15. Nc3 { winning for White, since the king can come back to hold in place the black a-pawn and the bishop, while the knight and white pawns can force a breakthrough. }) 10. Ke6 Qa8 11. Ng5 Kd8 12. Kf7 Qb8 13. Ne6+ Kc8 14. Ke8 Qa8 15. Ng7 Qb8 16. Nf5 Qa8 17. Ne7+ Kb8 18. Kd8 { zugzwang, winning for White } 1-0 [Event "White to move and draw"] [Site "chichitza.ro"] [Date "09.2012"] [Round "Standstill"] [White "Mihai Neghina"] [Black "---"] [Result "1/2-1/2"] [UTCDate "2019.09.09"] [UTCTime "23:20:00"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "1N4K1/1pp1p3/7k/2r3pP/p2pp1P1/P6N/8/2B5 w - - 0 1"] [SetUp "1"] 1. Nc6 { Sacrificing the knight only to displace the b-pawn on the c-column } (1. Na6 { is not aggressive enough, Black has time for Rxc1, winning }) (1. Nd7 Rxc1 { winning for Black }) (1. Bd2 Rd5 { the only way to win for Black } 2. Nc6 { now it is too late to get back to the mainline drawing idea } 2... bxc6 3. Nxg5 Rd8+ 4. Kf7 e3 { winning for Black }) 1... bxc6 { forced, otherwise mate at move 9: } (1... Rxc1 2. Nxe7 Rf1 3. Kh8 Rf8+ 4. Ng8+ Rxg8+ 5. Kxg8 e3 6. Ng1 d3 7. Nf3 d2 8. Ne5 d1=Q 9. Nf7#) (1... Rxc6 2. Bxg5# { is the threat that keeps the rook from taking the knight }) 2. Nxg5 Rxg5+ (2... Rxc1 3. Nf7#) 3. Kh8 { Black now has the awkward privilege of choosing whether he prefers to stalemate White by capturing the bishop or to be stalemated by White after having pushed all pawns in the diagonal of death c1-h6... draw } 1/2-1/2 [Event "White to move and draw"] [Site "Schach"] [Date "09.2012"] [Round "Shelter"] [White "Mihai Neghina"] [Black "---"] [Result "1/2-1/2"] [UTCDate "2019.09.09"] [UTCTime "23:20:00"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "4B3/k1K1pp2/p3bq2/2p1p3/1p2P1P1/4P2Q/nR6/8 w - - 0 1"] [SetUp "1"] 1. g5 (1. Rd2 Nc3 { winning for Black }) 1... Qxg5 2. Qxe6 (2. Qh8 Qf6 3. Rh2 (3. Qxf6 exf6 4. Rd2 b3 5. Rd8 Nc3 6. Bc6 Nb5+ 7. Bxb5 axb5 { winning for Black }) 3... Qxh8 4. Rxh8 Nc3 5. Bc6 Nb5+ 6. Bxb5 axb5 7. Rb8 b3 8. Rxb5 Ka6 9. Rxc5 Bg4 { winning for Black }) 2... fxe6 3. Rxa2 Qg8 (3... Qxe3 4. Bb5 Qa3 5. Rxa3 bxa3 6. Bc4 { winning for White }) 4. Ra4 { or Ra5, but keeping the a1 square cleared } (4. Ra1 Qf8 5. Ra5 Qf1 6. Bb5 Qxb5 7. Rxb5 axb5 { winning for Black }) 4... Qf8 5. Ra1 (5. Ra2 { or Ra5 } 5... Qf1 { winning for Black }) 5... b3 (5... c4 6. Ra4 c3 7. Rxb4 Qxe8 8. Rb7+ Ka8 9. Ra7+ Kxa7 { stalemate }) 6. Ra3 b2 7. Rb3 b1=Q 8. Rxb1 Qxe8 9. Rb7+ Ka8 10. Ra7+ Kxa7 { stalemate } 1/2-1/2 [Event "White to move and win"] [Site "chichitza.ro"] [Date "11.2012"] [Round "Chase"] [White "Mihai Neghina"] [Black "---"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:20:00"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "4N2k/4PB1p/7P/B1p5/2P5/3q2Pp/1P3P1K/2r5 w - - 0 1"] [SetUp "1"] 1. Bc3+ (1. Nc7? { or any other move } 1... Rh1+ 2. Kxh1 Qf3+ 3. Kh2 Qg2#) 1... Rxc3 (1... Qxc3 2. bxc3 { winning for White }) 2. Nc7! (2. Nd6? { or 2. Nf6? or 2.Ng7? } 2... Qxg3+ 3. fxg3 Rc2+ 4. Kxh3 (4. Kg1 h2+ 5. Kh1 Rc1+ 6. Kxh2 Rh1+) 4... Rh2+ 5. Kg4 Rh4+ { draw by perpetual check }) (2. bxc3? Qf1 { winning for Black }) 2... Qxg3+ (2... Qd7 { or Qe2 or Qe4 } 3. e8=Q+ Qxe8 4. Bxe8 { winning for White }) 3. fxg3 Rc2+ 4. Kxh3 Rh2+ 5. Kg4 Rh4+ 6. Kf5 Rf4+ (6... Rh5+ 7. Bxh5 Kg8 8. e8=R#) 7. Ke5 Re4+ 8. Kd5 (8. Kd6? Re6+ 9. Kd5 Rd6+ 10. Ke4 (10. Kxc5 Rc6+ { draw }) 10... Re6+ 11. Kf3 Rxe7 { draw }) 8... Re5+ 9. Kc6 Re6+ 10. Kb7 (10. Kxc5? Rc6+ { draw }) 10... Rb6+ 11. Kc8 Rb8+ 12. Kd7 { capturing the rook with checkmate or releasing the stalemate threat with a decisive advantage } 1-0 [Event "White to move and draw"] [Site "Componist"] [Date "12.2012"] [Round "Desperation"] [White "Mihai Neghina"] [Black "---"] [Result "1/2-1/2"] [UTCDate "2019.09.09"] [UTCTime "23:20:00"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "2b5/1pr4p/3bp1pk/1p6/1PpN2PP/K1P1n3/P3N1R1/3R4 w - - 0 1"] [SetUp "1"] 1. Nxb5 { Other moves lead to normal positions with Black being a pawn ahead. -+ } (1. Rgg1 Nxd1 2. Rxd1 Rf7 3. Nxb5 Bh2 { -+ }) (1. Rd2 Nxg2 2. Nxb5 e5 3. g5+ Kh5 { -+ }) (1. Rdg1 Nxg2 2. Rxg2 Bd7 { -+ }) (1. g5+ Kh5 2. Rdg1 Nxg2 { -+ }) 1... Nxd1 (1... Nxg2? 2. Rxd6 Re7 (2... Rg7 3. Na7 Bd7 4. Rb6 Be8 5. Nd4 { +- }) 3. Na7 Bd7 4. Rb6 Be8 5. Nd4 Nxh4 6. Nc8 Rc7 7. Nd6 Bc6 8. Nxe6 Re7 9. Nd4 Rd7 10. Nxc6 Rxd6 11. Rxb7 Rxc6 12. b5 { +- }) 2. Nxd6 (2. g5+? Kh5 3. Nxd6 Rc6 4. Nxb7 Bxb7 { -+ }) 2... b5 (2... e5 3. Rg1 Nf2 4. Rg2 Nd3 5. Ka4 { = }) (2... Rc6 3. Nf7+ Kg7 4. b5 Rb6 5. Kb4 Ne3 (5... Kxf7 6. Kc5 { +- }) 6. Rf2 { or Rg3 = }) (2... b6 3. Nxc8 Rxc8 4. Ka4 { = }) 3. g5+ { This move order does not work: } (3. Nxc8? Rxc8 4. g5+ Kg7 5. Nd4 Ra8#) 3... Kh5 (3... Kg7? 4. Ne8+ Kf7 5. Nxc7 { +- }) 4. Nxc8 { This move order does not work: } (4. Nf4+ Kxh4 5. Nxc8 e5 { -+ }) 4... Rxc8 5. Nf4+ Kxh4 6. Nxg6+ Kh3 7. Nf4+ Kh4 8. Ng6+ { Draw request 1: Knight checks } 8... hxg6 9. Rg4+ Kh3 10. Rg3+ Kh2 11. Rg2+ Kh1 12. Rg1+ Kh2 13. Rg2+ Kh3 14. Rg3+ Kh4 15. Rg4+ Kh5 16. Rh4+ Kxg5 17. Rg4+ { Draw request 2: Rook checks } (17. Rh5+? Kf4 18. Rf5+ Ke3 19. Re5+ Kf2 20. Rf5+ Ke2 21. Re5+ Ne3 { -+ }) 17... Kf6 18. Rf4+ (18. Rxg6+? Kf5 19. Rf6+ Kg4 20. Rg6+ Kf3 21. Rf6+ Ke2 22. Rxe6+ Ne3 { -+ }) 18... Kg7 (18... Ke7 19. Rf8 (19. Rf7+? Kd6 20. Rd7+ Ke5 21. Rd8 Nxc3 22. Rxc8 Kd4 { -+ }) 19... Rxf8 { stalemate } (19... Rc6 20. Re8+ Kf7 21. Rxe6 Rc8 22. Re8 Rc6 23. Re6 { = }) (19... g5 20. Rxc8 Nxc3 21. Kb2 Nd5 22. Rb8 g4 23. a3 c3+ 24. Kb3 Kf7 25. Rxb5 g3 26. Rb7+ Kf6 27. Rb8 Kf7 28. Rb7+ Kf6 { = }) (19... Nxc3 20. Rxc8 g5 { transposing to the previous variation = }) (19... Rc5 20. Rc8 Rd5 21. Re8+ Kf6 (21... Kd6 22. Rd8+ Ke5 23. Rxd5+ { = }) 22. Rxe6+ Kg5 23. Re5+ Kf4 24. Rxd5 Nxc3 25. Rd8 g5 26. Kb2 Na4+ 27. Kc2 g4 28. Rf8+ Ke4 29. Rb8 g3 30. Rxb5 g2 31. Rg5 Kf3 32. Rg8 Kf2 33. Rf8+ Kg3 34. Rg8+ Kh2 35. Rh8+ Kg1 36. Rg8 { = })) 19. Rf8 (19. Rf7+ { ? } 19... Kh6 20. Rf8 Rc6 21. Rh8+ Kg5 22. Rh5+ Kg4 23. Rg5+ Kf3 24. Rg3+ Ke2 25. Rg2+ Nf2 { -+ }) 19... Rc6 (19... Rc5 20. Rc8 { similar to a previous variation }) 20. Rg8+ (20. Rf7+? Kh6 21. Rh7+ Kg5 22. Rh5+ Kf4 23. Rf5+ Kg3 24. Rg5+ Kf3 25. Rf5+ Ke2 26. Re5+ Ne3 { -+ }) (20. Ra8? Nxc3 { -+ }) 20... Kf6 (20... Kh6 21. Rxg6+ { = }) 21. Rxg6+ Kf5 22. Rxe6 (22. Rf6+ { the same drawing idea } 22... Kg4 23. Rg6+ (23. Rf4+? Kg3 24. Rf3+ Kg2 25. Rg3+ Kf2 26. Rg2+ Kf3 27. Rg3+ Ke2 { -+ }) 23... Kf3 24. Rf6+ (24. Rg3+? Ke2 { -+ }) 24... Kg2 25. Rg6+ Kf1 26. Rxe6 (26. Rg1+ Ke2 27. Re1+ Kd3 28. Rxd1+ Kxc3 29. Rd6 { the same drawing idea }) 26... Rc7 27. Re7 Rc8 28. Re8 { repetition } 28... Rxe8 { or stalemate... }) 22... Rc7 23. Re7 Rc8 24. Re8 { Draw request 3: Rook versus Rook } 24... Rxe8 { stalemate... } 1/2-1/2 [Event "White to move and win"] [Site "9th WCCT (D39)"] [Date "09.2013"] [Round "Shield"] [White "Mihai Neghina"] [Black "Arpad Rusz"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:20:00"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "8/4Pr1N/8/6PN/8/3K1ppp/4prkb/4Bbnn w - - 0 1"] [SetUp "1"] 1. Nf8 { forcing the rook to the f8 square } (1. e8=Q Rd7+ { draw }) (1. N7f6 Rxf6 2. e8=Q Rd6+ { draw }) (1. g6 Rf5 2. Ng5 Rd5+ { draw }) (1. Kc2 Rf6 { draw }) 1... Rxf8 (1... Rf5 2. Kc3 { winning for White }) (1... Rf6 2. Ne6 Rf5 3. Nef4+ Rxf4 4. Nxf4#) 2. e8=Q { shielding the king from checks } (2. exf8=Q { stalemate }) (2. e8=N Rf6 3. Kc3 Rc6+ 4. Kb3 Rb6+ 5. Ka4 Ra6+ { draw }) 2... Rf7 3. Qe7 { shielding the king from checks } (3. Qc6 Rd7+ 4. Kc4 Rd4+ { draw }) 3... Rf6 4. Qe6 { shielding the king from checks } (4. Kc2 Rc6+ 5. Kb3 Rc4 { draw } (5... Rb6+ 6. Bb4 { winning for White }) (5... Rc3+ 6. Bxc3 { winning for White }) (5... Rf6 6. g6 { winning for White as in the mainline })) 4... Rf5 5. Qe5 { shielding the king from checks } 5... Rf8 6. Qd4 { shielding the king from checks } 6... Rf5 7. Kc3 { minor duals Kc2, Kc4 } 7... Rc5+ 8. Kb3 (8. Kb4 Rc4+ { draw }) 8... Rb5+ (8... Rc3+ 9. Bxc3 { winning for White }) 9. Ka4 Rf5 (9... Ra5+ 10. Bxa5 { winning for White }) 10. Qd8 { shortest path to mate } 10... Rf7 11. g6 Rf5 (11... Ra7+ 12. Ba5 { winning for White }) 12. Qg5 { Shielding the knight } 12... Rf8 13. g7 Rf5 14. g8=N { winning for White } 1-0 [Event "White to move and win"] [Site "EG"] [Date "02.2015"] [Round "Fork-field"] [White "Mihai Neghina"] [Black "---"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:20:00"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "3B2r1/n3Pp2/P7/5k1p/q3NP2/7K/5P2/4NB2 w - - 0 1"] [SetUp "1"] 1. Nf6 (1. Bd3 Qxe4 2. Bxe4+ Kxe4 { = }) (1. Ng3+ Ke6 2. Nd3 Qd4 3. Ne4 Rxd8 (3... Qxe4 4. Nc5+) 4. exd8=Q Qxd8 { -+ }) 1... Rh8 (1... Kxf6 2. e8=Q+ { #11 }) (1... Qd1 2. Bd3+ Ke6 3. f5+ Kd6 4. Nxg8 { +- }) (1... Re8 2. Nxe8 Qxe8 3. Kh2 { +- }) 2. Bd3+ (2. Nf3 Qa3 3. Kg2 Nc6 4. Nh4+ (4. e8=Q Rxe8 5. Nxe8 Nxd8 { -+ }) 4... Ke6 5. Bc4+ Kd6 6. Ne4+ Kd7 7. Bb5 Qc1 8. a7 Rg8+ 9. Ng3 Qa1 10. Nf5 Qxa7 11. Nh6 Rxd8 12. exd8=Q+ Kxd8 13. Bxc6 Qc7 14. Bf3 Qxf4 15. Ngf5 Qg5+ { -= }) (2. Be2 Qc6 3. Nf3 Qxf6 4. e8=Q Rxe8 5. Bd3+ Kxf4 6. Bxf6 Kxf3 { = }) (2. Bg2 Nc6 3. Be4+ Qxe4 4. Nxe4 Kxe4 { -= }) 2... Ke6 (2... Kxf6 3. e8=Q+ Kg7 4. Bf6+ Kxf6 5. Qe5#) (2... Kxf4 3. Bc7+ Kg5 4. Ne4+ Kh6 5. Bf4+ Kg7 6. Be5+ f6 (6... Kh6 7. Bxh8 { +- }) (6... Kh7 7. Nc3+ { fork +- }) 7. Bxf6+ Kf7 8. Bxh8 { +- }) 3. f5+ (3. Be4 Qxa6 4. Nf3 Qc8 5. f5+ Kd6 6. Ng5 Qc4 7. Bd5 Qd3+ 8. Kh2 Qxf5 9. Nxf7+ (9. Nge4+ Ke5 { = }) 9... Kc5 10. Nxh8 Qxf2+ { = }) (3. Nf3 Qxf4 4. Be4 Qxf6 5. e8=Q+ Rxe8 6. Ng5+ Qxg5 7. Bxg5 Kd7 { -= }) (3. e8=Q+ Rxe8 4. Nxe8 Qxe8 { -+ }) 3... Kd6 (3... Ke5 4. Nf3+ Kd6 5. Ne4+ Kc6 6. Ne5+ Kd5 7. Nc3+ Kxe5 8. Nxa4 { +- }) 4. Ne4+ (4. Nf3 Qa3 5. Be4 Nc8 6. a7 (6. e8=Q Rxe8 7. Nxe8+ Kd7 { -+ }) 6... Nxa7 { -= }) 4... Kc6 (4... Ke5 5. Bc7+ Kd4 (5... Kxf5 { or Kd5 } 6. Nc3+ { +- }) 6. Bb6+ Ke5 7. Nf3+ Kf4 (7... Kxf5 { or Kd5 } 8. Nc3+ { +- }) 8. Neg5 { or Nd2 #2 }) 5. Nc2 { The Black King and Queen are not individually dominated, but they chained together in a forkfield... } (5. Nf3 Qa3 6. Ne5+ Kd5 7. f4 Nc8 8. e8=Q (8. Nf6+ Kd4 9. a7 Nxe7 10. Bxe7 Qc1 { = }) (8. a7 Qxa7 { = }) 8... Rxe8 9. Nf6+ Kd4 10. Nxe8 Qc1 { = }) 5... h4 (5... Re8 6. Kg3 { if allowed, heading towards e3 to support the forkfield } 6... h4+ (6... Nc8 7. Bb5+ Kxb5 8. Nc3+ Kxa6 9. Nxa4 Nxe7 10. Bxe7 Rxe7 11. Nc3 Rc7 { (11...Re5 12. Ne3 +-) } 12. Nd5 { forkfield (II) +- }) 7. Kh3 Rh8 (7... Rg8 8. f4 Re8 9. Kxh4 { +- }) 8. f3 { +- }) (5... Rg8 6. f4 Rh8 7. Kh4 { +- }) (5... Kd7 6. Nc5+ { fork }) (5... Kd5 { or Kb5 } 6. Nc3+ { fork }) (5... Qxa6 { or Qa2 } 6. Nb4+ { fork }) (5... Qb5 { or Qb3 } 6. Nd4+ { fork }) 6. f3 { (Kh2 is unnecessary, leading back to the mainline some moves later) } (6. f4 f6 { Zugzwang White = }) (6. Kg2 h3+ 7. Kh2 f6 8. Kg1 (8. f3 { or f4 } 8... Qa2 { no fork = }) 8... Rg8+ 9. Kh1 Re8 10. Kh2 Rh8 { White cannot triangulate his way out of this... = }) (6. f6 Rg8 7. Kh2 (7. f3 Re8 8. f4 Rh8 { -+ }) 7... Rh8 { passive defense = }) 6... Re8 { (Rg8 is worse, losing a tempo for Black) } 7. f4 (7. Kxh4 Kd7 { no fork -= }) 7... Nc8 (7... Rh8 8. f6 Re8 9. Kxh4 Rg8 10. Kh3 Re8 11. Kg3 Rg8+ 12. Kf3 Re8 13. Nc3 { since the White king now blocks the queen's escape squares f/g/h4, Nc3 forces the Queen to move into the forkfield +- }) 8. Bb5+ Kxb5 9. Nc3+ Kxa6 10. Nxa4 Nxe7 11. Bxe7 Rxe7 12. Nc3 { ! } 12... Rc7 13. Nd5 { forkfield (II) secures both pawns and both knights; winning for White } 1-0 [Event "White to move and win"] [Site "Glarean"] [Date "10.2015"] [Round "Harassment"] [White "Mihai Neghina"] [Black "---"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:20:00"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "8/q1p1N1p1/3p1p1p/pk5P/1p2BB2/8/PK3P2/8 w - - 0 1"] [SetUp "1"] 1. Be3 (1. Bd3+ { ? } 1... Ka4 2. Be3 Qb7 3. Bg6 (3. Nf5 { ? } 3... b3 4. a3 Qd5 5. Nd4 c6 6. Be2 Qc5 7. Bd1 Qxa3+ { -+ }) 3... Kb5 4. Bd3+ Ka4 { = }) (1. Bc6+ { ? } 1... Kc4 2. Be3 Qb8 3. Bf3 { threatening Be2# } 3... Kd3 4. Ng6 { threatening Nf4+ Be2# } (4. Nd5 { similar to 4.Ng6 }) 4... Kc4 5. Ne7 { = } (5. Nf4 { ? } 5... Kb5 6. Be2+ Kc6 { -+ })) 1... c5 (1... Qb8 2. Bd3+ Ka4 3. Nc6 Qb7 4. Nd4 Qd5 5. Bc2+ b3 6. Bxb3+ { +- }) 2. Bd3+ (2. Bc6+ { ? } 2... Kc4 { -+ }) 2... Ka4 (2... Kb6 3. Nc8+ { +- }) (2... c4 3. Bxc4+ Kxc4 4. Bxa7) 3. Nd5 (3. Bc2+ { ? } 3... Kb5 (3... b3 { ? } 4. axb3+ Kb5 5. Bd3+ Kb6 6. Nc8+ { +- }) 4. Bd3+ Ka4 { = }) 3... Qb7 (3... f5 4. f4 Qb7 5. Bc4 Qb8 6. Bf2 Qd8 7. Bh4 Qb8 (7... Qxh4 8. Nb6#) 8. Be7 Qb7 9. Bd8 Qa7 10. Nc7 { +- }) (3... Qb8 { similar to 3...Qb7 }) 4. Bc4 Qb8 { Black's best defense is passive, trying not to create any weaknesses while the queen keeps b6 guarded. } 5. Bc1 { The bishop cannot break Black with sheer force (sacrifice), nor can he sneak around the defense. It's therefore the king's turn to attempt a siege. But in the meantime, a3 must be protected to keep the black king cornered and to prevent b3 breakthroughs. } (5. Bf4 Qd8 6. Bg3 Qb8 { keeping both b6 and d6 defended }) 5... Qd8 6. Kc2 (6. Kb1 Qb8 7. f3 Qd8 8. Nf4 Qc8 9. Nd3 Qf5 10. Ka1 Qxf3 11. Nb2+ Ka3 12. Be6 Qc3 13. Kb1 { +- }) 6... Qb8 7. Bb2 Qa7 8. f3 { defending g4 } (8. f4 { ? } 8... Qb8 9. Kd3 Qa7 10. Ke4 Qb8 11. Kf5 (11. Kf3 Qd8 12. Kg4 Qc8+ 13. Kg3 { = }) 11... Qc8+ 12. Kg6 Qb7 13. Kh7 { ? } 13... g5+ 14. Kxh6 g4 15. Kg6 g3 16. Bc1 (16. h6 g2 17. h7 g1=Q+ { -+ }) 16... g2 17. Be3 Qb8 18. Kg7 (18. Kf7 b3 19. axb3+ Ka3 20. h6 Qh8 21. f5 Qh7+ 22. Kxf6 g1=Q 23. Bxg1 Qxh6+ 24. Ke7 Qg7+ 25. Kxd6 Qxg1 26. f6 Qg3+ 27. Kxc5 a4 28. bxa4 Kxa4) 18... b3 19. axb3+ Ka3 20. h6 Qe8 21. h7 Qxe3 22. Nxe3 g1=Q+ 23. Kf7 Qh1 24. Kg7 Qg1+ 25. Kf7) (8. Kd3 { The king move is not terrible by itself, but without f3 it is a draw. } 8... Qb7 9. Ke4 Qb8 10. Kf4 Qd8 11. Kf5 Qc8+ 12. Kg6 Qg4+ 13. Kh7 Qxc4 14. Nb6+ Kb5 15. Nxc4 Kxc4 16. Kxg7 b3 17. axb3+ Kxb3 18. Bxf6 (18. Bc1 c4 19. Kxh6 c3 20. Kg6 a4 21. h6 a3 22. Bxa3 Kxa3 23. h7 c2 24. h8=Q c1=Q { = }) 18... d5 19. Kxh6 d4 20. Kg6 d3 21. Bg5 c4 22. h6 c3 23. h7 d2 24. h8=Q d1=Q { = }) 8... Qb7 9. Kd3 Qa7 10. Ke4 Qb7 11. Kf5 Qd7+ 12. Kg6 Qb7 13. Kh7 { the g5+ trick does not work, as the f-pawn can intercept } 13... Qa7 14. Kg8 Qb7 15. Kf8 Qa7 16. Ke8 Qb7 17. Kd8 Qa7 18. Kc8 Qa8+ 19. Kd7 Qb8 (19... Qb7+ 20. Nc7 b3 21. a3 Qb6 22. Nd5 { threatening Nc3# } 22... Qb5+ 23. Bxb5+ Kxb5 24. Kxd6 { +- }) 20. Nc7 b3 21. a3 Qb7 22. Bd5 Qxd5 23. Nxd5 Kb5 24. Kxd6 { 1-0 Black resigns. } 1-0 [Event "White to move and win"] [Site "Die Schwalbe"] [Date "12.2016"] [Round "Smothering"] [White "Mihai Neghina"] [Black "Michael Roxlau"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:20:00"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "6kq/2p4p/6P1/5nN1/K7/2P5/7B/3B4 w - - 0 1"] [SetUp "1"] 1. Bb3+ { ! } (1. g7 Nxg7 2. Bb3+ Ne6 { = } { ! }) 1... Kf8 2. g7+ { ! } 2... Nxg7 3. Nf7 Qg8 4. Nh6 Qh8 5. Be5 Ke7 6. Bg8 Kf8 (6... Qxg8 7. Nxg8+ Kf7 8. Nh6+ Kg6 9. Ng4 { +- }) 7. Bd4 { ! } (7. Kb5 Qxg8 { = }) 7... Ke8 (7... Qxg8 8. Bc5+ Ke8 9. Nxg8 { +- }) 8. Kb5 Kd7 9. Be5 { ! } (9. Kc5 Kc8 { ! } 10. Kc6 Kb8 { = }) 9... Ke8 (9... Kc8 10. Kc6 { +- }) 10. Kc6 Kf8 11. Bd4 { ! } 11... Qxg8 12. Bc5+ Ke8 13. Nxg8 { +- } 1-0 [Event "White to move and win"] [Site "?"] [Round "Smothering II"] [White "W"] [Black "B"] [Result "1-0"] [FEN "5k2/2p4p/6P1/1p3n2/3q4/PB4BN/KP5P/8 w - - 0 1"] 1. Ng5 (1. gxh7 {?} Qh8 2. Ng5 Nxg3 3. hxg3 (3. Bg8 Ne2 4. Nf7 Qd4 5. h8=Q Qc4+ 6. Ka1 Qc1+ {=}) 3... Ke7 4. Bg8 Qd4 5. Nf7 Qd5+ 6. Ka1 Qd1+ {=}) 1...Qh8 (1... Ke7 {or Ke8} 2. gxh7 {now gxhworks} Nxg3 3. Nf7 Ne2 4. h8=Q Nc1+ (4... Qxh8 5. Nxh8) 5. Kb1 Nxb3 6. Qxd4 Nxd4 7. Ne5 {it may take some time, butthere is an extra h-pawn}) 2. g7+ (2. gxh7 {?} Nxg3 {same draw as 1.gxh?}) (2.Nxh7+ Ke7 3. Bf4 b4 {=}) (2. Ne6+ Ke7 3. g7 Nxg7 4. Be5 c5 {=}) 2... Nxg7 (2... Qxg7 3. Ne6+) (2... Kxg7 3. Be5+) 3. Nf7 {the smothered matemanouver, applied to the queen} Qg8 4. Nh6 Qh8 5. Be5 Ke7 {or Ke8} 6. Bg8 Kd7 (6... Kf8 7. Kb3 Qxg8+ 8. Nxg8 Kxg8 9. Bxg7 {+-}) 7. Kb3 {the moves are not forced any more, they depend on how Black reacts or sets up a defensive posture, for instance:} Kc6 (7... c5 8.Kc3 Kc6 9. b4 c4 10. a4 bxa4 11. Kxc4) 8. Kb4 Kb6 9. Bd4+ Ka6 10. Be5 Kb6 (10... c6 11. Kc5 Ne6+ 12. Kd6 Ng7 13. Kxc6) 11. a4 bxa4 12. Kxa4 Ka6 13. Bd4 Kb7 14. Kb5 c6+ 15. Ka5 Kc7 16. Ka6 Kd7 17. Kb7 {zugzwang, +-} 1-0 [Event "White to move and draw"] [Site "ARVES/UAPA"] [Date "09.2017"] [Round "Fishing Rod"] [White "Mihai Neghina"] [Black "---"] [Result "1/2-1/2"] [UTCDate "2019.09.09"] [UTCTime "23:20:00"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "8/1B3b1p/7P/p2p4/P2pp1kp/Q7/1N1Pq2P/7K w - - 0 1"] [SetUp "1"] 1. Qh3+ { ! } (1. Bc8+ { ? } 1... Kh5 { -+ }) (1. h3+ { ? } 1... Kh5 { -+ }) (1. Qa1 { ? } 1... Kf3 { -+ }) 1... Kxh3 (1... Kg5 2. Qg2+ { = }) (1... Kf4 { ? } 2. Qxh4+ { +- }) 2. Bc8+ Qg4 3. Nd1 { ! } (3. Nd3 { ? } 3... exd3 { cannot sustain the stalemate threat }) 3... e3 4. d3 (4. dxe3 dxe3 5. Be6 d4 { tempo-losing move that breaks the bishop symmetry, -+ }) 4... Qxc8 (4... Bg6 5. Bf5 { = }) (4... Bh5 5. Be6 { = }) (4... Be8 5. Bd7 { = }) (4... Bg8 5. Be6 { = }) (4... Be6 5. Bxe6 { = }) 5. Nf2+ exf2 { stalemate } 1/2-1/2 [Event "White to move and draw"] [Site "StrateGems"] [Date "03.2017"] [Round "Castle"] [White "Mihai Neghina"] [Black "---"] [Result "1/2-1/2"] [UTCDate "2019.09.09"] [UTCTime "23:20:00"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "6k1/1qr1p2p/ppN5/3p1N2/6p1/1P1P2Pp/PP2PP1P/2RK4 w - - 0 1"] [SetUp "1"] { Inspired by V Chekover 1947 study (FEN: 7r/p3k3/2p5/1pPp4/3P4/PP4P1/3P1PB1/2K5 w - - 0 1) } 1. Ncxe7+ (1. b4 { ? } 1... Rxc6 2. Rxc6 Qd7 { -+ }) (1. Nfd4 e5 2. Nxe5 Rxc1+ 3. Kxc1 Qc8+ { followed by Qf8 -+ }) 1... Kf8 (1... Kh8 { same as mainline }) (1... Rxe7 2. Rc8+ Qxc8 (2... Kf7 3. Nd6+ { +- }) 3. Nxe7+ Kf7 4. Nxc8 { +- }) (1... Kf7 2. Nd6+ Kxe7 3. Nxb7 { +- }) 2. Ng6+ (2. Rxc7 Qxc7 3. Ng6+ Ke8 { -+ }) 2... hxg6 (2... Kg8 3. Nge7+ { = }) (2... Ke8 { or Kf7 } 3. Nd6+ { +- }) 3. Rxc7 (3. Nd4 Rxc1+ 4. Kxc1 Qf7 { -+ }) 3... Qxc7 4. Nd4 Qe5 5. e3 b5 6. a3 { White has reached the desired defensive position. This is not only a fortress, it is an entire castle... } (6. Kd2 { ? } 6... b4 { -+ }) 6... Kf7 7. Kd2 { any K move inside the headquarters E1-E2-D1-D2 is fine } (7. b4 { ? } 7... Qb8 8. Kd2 Qb6 9. Ke2 a5 10. bxa5 Qxa5 { -+ }) (7. a4 { ? } 7... bxa4 8. bxa4 Qb8 { -+ }) (7. Kc2 { ? } 7... Qf6 { -+ }) 7... Kg8 { If Black tries nothing, White does nothing } (7... Qf6 8. Ke2 { When the bQ is on the f-file, wK guards f2 by shuffling between Ke1 and Ke2; }) (7... Qc7 8. Kd1 { When the bQ is on the c-file, wK guards c1 by shuffling between Kd1 and Kd2; } 8... Qa5 9. Ke2 { When the bQ is on the a5-e1 diagonal, wK guards d2 and e1 by shuffling between Kd1 and Ke2; } (9. b4 { ? } 9... Qb6 { -+ })) (7... b4 8. a4 { ab blockade } 8... a5 9. Ke1 Qd6 10. Kd1 Qa6 11. Kd2 { When the bQ is on the a6-f1 diagonal, wK guards d3 by shuffling between Kd2 and Ke2; } (11. Kc2 { ? } 11... Qf6)) (7... Qb8 8. Kd1 a5 9. Kd2 a4 10. b4 { ab blockade } 10... Qb6 11. Kd1 Kf6 12. Kd2 Ke5 13. Kd1 Qxd4 14. exd4+ Kxd4 15. Kd2 { wK is always close enough to defend d3 }) 1/2-1/2 [Event "White to move and draw"] [Site "Probleemblad"] [Date "03.2017"] [Round "Evil Eye"] [White "Mihai Neghina"] [Black "---"] [Result "1/2-1/2"] [UTCDate "2019.09.09"] [UTCTime "23:20:00"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "8/pr1Pq3/br1kP3/1R2RQ2/5p2/1nPK4/5P2/8 w - - 0 1"] [SetUp "1"] 1. Qxf4 { preparing for a discovered check } (1. c4 { ? } 1... Rxb5 2. cxb5 Rxb5 3. Rxb5 Bxb5+ 4. Qxb5 Nc5+ 5. Kd2 Nxe6 { -+ }) (1. Rd5+ { ? } 1... Kc6 2. d8=Q Qxd8 3. Rxd8 Rxb5 4. Qe4+ Rd5+ 5. Kc2 Bd3+ 6. Qxd3 Rxd3 7. Rxd3 Nc5 { -+ }) (1. d8=Q+ { ? } 1... Qxd8 2. Rd5+ Kc6 { same as 1.Red5+ variation }) 1... Rxb5 (1... Rxd7 { ? } 2. Ke3 Rxb5 (2... Bxb5 3. exd7 Qxd7 4. Rxb5+ Ke7 (4... Kc6 5. Qc4+ Kb7 6. Rxb3 { += }) 5. Qh4+ { = }) 3. Rxb5+ Kc6 (3... Kxe6 4. Re5+ Kd6 5. Rxe7+ Kxe7 6. Qb4+ { +- }) 4. Qc4+ Kd6 5. Qf4+ Kc6 6. Qc4+ { = }) (1... Bxb5+ { ? } 2. Rxb5+ Kxe6 3. Qf5+ Kd6 4. d8=Q+ Qxd8 5. Rd5+ Kc7 6. Rxd8 Kxd8 7. Qf8+ { = }) 2. Rxb5+ Kxe6 (2... Kc6 { ? } 3. Qc4+ Qc5 4. Qe4+ Kc7 5. Qf4+ Kc6 6. Qe4+ { = }) 3. Qc4+ { interposition of the queen on the a6-d3 diagonal } (3. Qh6+ { ? } 3... Kxd7 4. Qxa6 Nc1+ 5. Kd4 Ne2+ 6. Kd3 Nf4+ 7. Kd4 Ne6+ 8. Kd3 Rxb5 9. Qxb5+ Kc7 { -+ }) 3... Kxd7 (3... Kf6 { ? } 4. Qf4+ { = }) 4. Rxb7+ Ke8 (4... Kd8 { ? } 5. Rb8+ Kd7 6. Rb7+ { same as before }) (4... Bxb7 { ? } 5. Qxb3 { wrong bishop = }) (4... Kd6 { ?? } 5. Qxa6+ { #6/0 }) 5. Rxe7+ (5. Rb8+ { ? } 5... Qd8+ 6. Rxd8+ Kxd8 { d8 is a better square for the bK than e7 } 7. f4 Bxc4+ 8. Kxc4 Nd2+ { -#36/0 }) (5. Rb5 { ? } 5... Nc5+ 6. Kc2 { or Kd4 } 6... Bxb5 7. Qxb5+ Kf8 { -+ }) (5. Qxa6 { ? } 5... Nc5+ 6. Kd4 (6. Kc4 Qe2+ 7. Kxc5 Qxa6 { -+ }) 6... Nxa6 7. Rxe7+ Kxe7 { -#36/0 }) 5... Kxe7 { Critical position for the distant opposition of bK and f-pawn } 6. f4 (6. Qxa6 { ? (too soon) } 6... Nc5+ 7. Kc4 Nxa6 { this (*) variation is a struggle of tempi and an unusual distant opposition between the Black King and the White f-pawn, -+ } 8. Kb5 Nc7+ { ! (unique moves marked with !) } (8... Nb8 9. f4 { or c4 = }) 9. Kc6 Ke8 (9... Ne8 10. Kb5 Nc7+ 11. Kc6 { unnecessary repetition }) (9... Kd8 10. f4 Ke7 11. f5 Kf6 12. Kxc7 a5 13. c4 a4 14. c5 a3 15. c6 a2 16. Kb8 { or Kb7 } 16... a1=Q 17. c7 { c-pawn draw }) 10. f4 (10. f3 Ke7 { ! (Kd8? leads to the c-pawn draw) } 11. f4 Kd8 { same variation but with extra move }) 10... Kd8 { ! } 11. f5 Ne8 { ! (Ke8 or Ke7 =) } 12. c4 (12. Kc5 Kd7 { -#32/0 }) 12... Kc8 { ! (Ke7 leads to the c-pawn draw) } 13. c5 Kd8 { ! (Nf6 Kb5 =) } 14. Kb5 Nc7+ { ! (Kc7 c6 =) } 15. Kc6 (15. Ka5 Ke7 { -#24/0 }) 15... a5 { -#23/0 }) (6. f3 { ? (too slow) } 6... Kd7 (6... Bxc4+ { ? } 7. Kxc4 { = }) 7. f4 { White has lost a tempo, -+ } 7... Bxc4+ 8. Kxc4 Nd2+ { ! } 9. Kb5 Kc7 { or Kc8 } 10. c4 Kb7 { ! } 11. c5 a6+ { ! } 12. Ka5 Nb3+ { ! } 13. Kb4 Nd4 { ! } 14. Kc4 Nf5 { -#30/0 }) 6... Ke8 (6... Bxc4+ { ? } 7. Kxc4 { = }) (6... Nc5+ { ? } 7. Kd4 Bxc4 8. Kxc5 { wrong colour bishop = } (8. Kxc4 { ? } 8... Na6 { -#37/0 })) (6... Nc1+ { ? } 7. Kc2 Bxc4 8. Kxc1 { wrong colour bishop = }) (6... Kd6 { ? } 7. Qxa6+) (6... Kd8 { ? } 7. Qxa6 Nc5+ 8. Kc4 Nxa6 { = }) (6... Kd7 { ? } 7. f5 Kd8 { or Ke7 or Ke8 or Kc7 or Kc8 } 8. Qxa6 Nc5+ 9. Kc4 Nxa6 { = }) 7. f5 (7. Qxa6 { ? (too soon) } 7... Nc5+ 8. Kc4 Nxa6 9. Kb5 Nc7+ 10. Kc6 Kd8 { -+, see * variation }) 7... Kd7 (7... Bxc4+ { ? } 8. Kxc4 { = }) (7... Kd8 { ? or Ke7? } 8. Qxa6 Nc5+ 9. Kc4 Nxa6 { = }) 8. f6 (8. Qxa6 { ? (too soon) } 8... Nc5+ 9. Kc4 Nxa6 10. Kb5 Nc7+ 11. Kc5 Ne8 { -+, see * variation }) 8... Kd8 (8... Bxc4+ { ? } 9. Kxc4 { += }) (8... Ke8 { ? } 9. Qxa6 Nc5+ 10. Kc4 Nxa6 { = }) 9. Qxa6 { !! } (9. f7 { ? } 9... Ke7 10. Qxa6 { ? (too late) } 10... Nc5+ 11. Kc4 Nxa6 12. Kb5 Nb8 { -#24/0 } (12... Nc7+ { ? } 13. Kc6 { = })) 9... Nc5+ 10. Kc4 Nxa6 11. Kb5 { with the pawn on f6, neither Nc7+ nor Nb8 work... } 11... Nc7+ (11... Nb8 12. c4 { or Kc5 = }) 12. Kc6 Ke8 13. f7+ Kf8 (13... Ke7 14. f8=Q+ Kxf8 { same as mainline }) 14. Kxc7 a5 15. c4 a4 16. c5 a3 17. c6 a2 18. Kb8 { or Kb7 } 18... a1=Q 19. c7 { c-pawn draw } 1/2-1/2 [Event "White to move and win"] [Site "Probleemblad"] [Date "03.2018"] [Round "Roundabout"] [White "Mihai Neghina"] [Black "---"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:20:00"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "4b3/5p2/2p4p/P1p1PN2/2pn2P1/P2k4/Pr1npKN1/B7 w - - 0 1"] [SetUp "1"] 1. Ne1+ (1. Bxb2 { ?? } 1... Ne4+ 2. Kg1 Nf3+ 3. Kh1 Nf2# { # }) 1... Kc3 (1... Ke4 2. Bxb2 Bd7 3. a6 Nb5 4. Nxh6 { +- }) 2. Ng3 (2. a6 { ? } 2... Ne4+ 3. Ke3 Nb5 4. Kxe4 Kd2 { -+ }) 2... Bd7 3. a6 Bc8 4. a7 Bb7 5. Kg2 (5. g5 { ? } 5... hxg5 6. Kg2 g4 { = }) 5... Ba8 6. Kh3 (6. g5 { minor dual }) (6. e6 { minor dual }) (6. Kh2 { or any other dark square where Black can check with a knight is losing -+ }) 6... Bb7 7. g5 (7. e6 { minor dual }) 7... hxg5 8. Kg4 Ba8 (8... Bc8+ 9. e6 { +- }) 9. Kh5 (9. e6 { ? } 9... f5+ { -+ }) (9. Kxg5 N2f3+ { -+ }) 9... Bb7 10. e6 fxe6 11. Kg6 Ba8 12. Kf6 { triangulation over f6 } (12. Kh7 { minor dual }) 12... Bb7 13. Kf7 Ba8 14. Ke8 Bb7 15. Kd7 Ba8 16. Kc8 { Zugzwang } 16... e5 (16... Bb7+ 17. Kb8 { +- }) 17. Kd7 Bb7 18. Ke8 Ba8 19. Kf7 Bb7 20. Kf6 Ba8 21. Kg6 Bb7 22. Kf7 Ba8 23. Ke8 Bb7 24. Kd7 Ba8 25. Kc8 { Zugzwang } 25... e4 (25... Bb7+ 26. Kb8 { +- }) 26. Kd7 Bb7 27. Ke8 Ba8 28. Kf7 Bb7 29. Kf6 Ba8 30. Kg6 Bb7 31. Kf7 Ba8 32. Ke8 Bb7 33. Kd7 Ba8 34. Kc8 { Zugzwang } 34... e3 (34... Bb7+ 35. Kb8 { +- }) 35. Kd7 Bb7 36. Ke8 Ba8 37. Kf7 Bb7 38. Kf6 Ba8 39. Kg6 Bb7 40. Kf7 Ba8 41. Ke8 Bb7 42. Kd7 Ba8 43. Kc8 { Zugzwang } 43... g4 (43... Bb7+ 44. Kb8 { +- }) 44. Kd7 Bb7 45. Ke8 Ba8 46. Kf7 Bb7 47. Kg6 { the g pawn must be eliminating before the final zugzwang, but it could not be eliminated before because it stood on a dark square that was indirectly guarded by ...Nf3+ } (47. Kf6 { ? } 47... Ba8 48. Kg6 Bb7 49. Kf7 Ba8 50. Ke8 Bb7 51. Kd7 Ba8 52. Kc8 Bb7+ 53. Kb8 Ba6+ 54. Bxb2+ Kxb2 55. a8=Q Bb5 { = }) 47... Ba8 48. Kh5 Bb7 49. Kxg4 Ba8 50. Kh5 Bb7 51. Kg6 Ba8 52. Kf6 Bb7 53. Kf7 Ba8 54. Ke8 Bb7 55. Kd7 Ba8 56. Kc8 { Zugzwang } 56... Bb7+ 57. Kb8 Ba6+ 58. Bxb2+ Kxb2 59. a8=Q { +- } 1-0 [Event "White to move and win"] [Site "Glarean"] [Date "01.2019"] [Round "Confusion"] [White "Mihai Neghina"] [Black "---"] [Result "1-0"] [UTCDate "2019.09.09"] [UTCTime "23:23:19"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Vinvin"] [FEN "4q1kn/2Bp1p2/1N1PpPp1/1P2P1P1/2N3b1/6p1/1P4Pb/7K w - - 0 1"] [SetUp "1"] 1. Na5 (1. b4 { or other moves } 1... Bf5 2. Na5 Be4 { controlling b7; if the Nd8 fortress is not be completed, Nb6 cannot move out of the way of the pawn }) 1... Bf5 (1... Be2 2. Nb7 Bxb5 3. Nd8 Kh7 (3... Qf8 4. b3 Ba6 (4... Qh6 5. gxh6 Kh7 6. Na4 { +- }) 5. Na4 { +- }) 4. b3 { and continuing as in the mainline }) (1... Bd1 2. Nb7 Be2 3. Nd8 Bxb5 4. b3 { +- }) 2. Nb7 (2. b4 { ? } 2... Be4 { controlling b7 }) 2... Bd3 (2... Bc2 3. Nd8 Bb3 { attempting to dominate the Nb6 } 4. Nc8 { +- }) 3. Nd8 Bxb5 (3... Bf1 4. b3 { +- }) 4. b3 (4. b4 { ? } 4... Kh7 5. Nc8 Kg8 6. Na7 Ba6 7. b5 Bb7 8. b6 Ba6 9. Nb5 Bxb5 10. b7 { White promotes, but cannot win… }) 4... Bd3 (4... Kh7 5. Na4 { +- } (5. Nc4 { ? } 5... Bxc4 6. bxc4 { = })) (4... Qf8 5. Na4 Qh6 6. gxh6 g5 7. Bb6 Ng6 8. h7+ Kxh7 9. Nxf7 { +- }) 5. Na4 Bc2 6. Nc5 Bd1 7. b4 Be2 8. Nb3 Kh7 9. Nd4 Bc4 10. b5 Kg8 11. b6 Bd5 12. Ne2 Kh7 13. Nc1 Kg8 (13... Be4 14. Nb3 Bd5 15. Nc5 { and continuing as in the mainline }) 14. Nd3 Kh7 15. Nc5 Kg8 16. b7 Bxb7 17. Ncxb7 { and now the freeing of the king } 17... Kh7 18. Nc5 (18. Bb6 Kg8 19. Bg1 { also wins }) 18... Qf8 19. Nd3 Kg8 20. Ne1 Qe8 21. Nf3 Kh7 22. Nxh2 gxh2 23. Kxh2 Qf8 24. Kg3 Qg8 25. Kf3 Qe8 26. Ke4 Qg8 27. Kd4 Qf8 28. Kc5 Kg8 29. Kb6 Kh7 30. Kb7 Qe8 31. Bb6 (31. Kc8 { also wins } 31... Kg8 32. Bb8 Kh7 33. Kc7 Kg8 34. Nb7 Kh7 35. Nc5 { followed by Nxd7 }) 31... Kg8 32. Nc6 Kh7 33. Nb8 Kg8 34. Kc7 Kh7 35. Nxd7 { +- } 1-0 [/pgn]