Borderline endgame #2

[Nordlandia]

Wojtaszek played 28...f6 which is nothing but a draw. 28...Qd8 with possible winning edge. It's probably than N vs BB can happens out of this position.

[d]4nk2/2q2p2/1b1pb2p/1p2pN2/4P2Q/2P3NP/1P3PP1/6K1 b - - 0 28

[pgn][Event "Grand Prix Moscow 2019"] [Site "Moscow"] [Date "2019.05.25"] [Round "3.4"] [White "Nepomniachtchi, Ian"] [Black "Wojtaszek, Radoslaw"] [Result "1/2-1/2"] [ECO "B51"] [WhiteElo "2773"] [BlackElo "2724"] [Annotator "ChessBase"] [PlyCount "72"] [EventDate "2019.05.17"] [EventType "k.o."] [EventCountry "RUS"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] [TimeControl "1500+10"] 1. e4 {0} c5 {0} 2. Nf3 {0} d6 {0} 3. Bb5+ {0} Nd7 {0} 4. d4 {1} cxd4 {0} 5. Qxd4 {2} a6 {0} 6. Bxd7+ {5} Bxd7 {2} 7. Nc3 {2} e5 {15} 8. Qd3 {2 B51: Sicilian: Moscow Variation (3 Bb5+) without 3...Bd7} Rc8 {21} 9. O-O {17} h6 { 65} 10. Nd2 {22} Qc7 {16} (10... Be6 11. Rd1 Nf6 12. Nf1 Bc4 13. Qf3 Bxf1 14. Kxf1 Be7 15. Qd3 Rc6 {1/2-1/2 (30) Ni,H (2674)-Fedoseev,V (2702) China 2019}) 11. h3 {38} Nf6 {13} 12. a4 {2} Be7 {8} 13. Rd1 {3} O-O {52} 14. Nf1 {4} Be6 { 34} 15. Ne3 {3} Qc5 {1} 16. Qe2 $146 {56} ({Predecessor:} 16. a5) 16... Bd8 {65 } 17. Qf3 {14} b5 {326} 18. axb5 {79} axb5 {1} 19. Ne2 {175} Bb6 {190} 20. Ng3 {87} Ra8 {2} 21. Rxa8 {112} Rxa8 {1} 22. c3 {56} Ra1 {399} 23. Nef5 {23} Ne8 { 103} 24. Be3 {227} Rxd1+ {10} 25. Qxd1 {3} Qc7 {3} 26. Bxh6 {76} (26. Qd3 $11 Bxe3 27. Nxe3 (27. Qxe3 Qd7 $11)) 26... gxh6 {72} 27. Qg4+ {5} Kf8 {31} 28. Qh4 {12} f6 {67} (28... Qd8 $17 29. Qxh6+ Kg8) 29. Qxh6+ {5} Kg8 {2} 30. Qg6+ {36} Kf8 {2} 31. Qh5 {94} Qf7 {87} 32. Qh8+ $14 {16} Qg8 {2} 33. Qh6+ {5} Kf7 {10} 34. Qh5+ {11} Kf8 {30} 35. Qh6+ {14} Kf7 {2} 36. Qh5+ {20} Kf8 1/2-1/2 [/pgn]

Nepomniachtchi,I - Wojtaszek,R Line, Grand Prix Moscow 2019

[d]3qn1k1/5p2/1b1pb2Q/1p2pN2/4P3/2P3NP/1P3PP1/6K1 w - - 0 1

Analysis by Stockfish 250519 64 BMI2:

30.Qd2 Ba5 31.Qh6 b4 32.cxb4 Bxb4 33.Qe3 Ba5 34.Kh2 Bb6 35.Qd2 Ng7 36.Qh6 Qf8 37.Qg5 Bd8 38.Qg4 Kh8 39.b4 Nxf5 40.Nxf5 Qg8 41.Qxg8+ Kxg8 42.Nxd6 Be7 43.Nf5 Bxb4 44.g4 Bc4 45.Kg3 Bd3 46.f4 Bxe4 47.fxe5 Bd2 48.Nd6 Bd5 49.h4 Kh7 50.Nf5 Be1+ 51.Kf4 Be6 52.Ke4 Bd2 53.h5
Black is clearly better: -+ (-1.65) Depth: 42/71 00:02:02 1987MN, tb=619858
(25.05.2019)

[pgn][Event "?"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "New game"] [Black "?"] [Result "*"] [SetUp "1"] [FEN "3qn1k1/5p2/1b1pb2Q/1p2pN2/4P3/2P3NP/1P3PP1/6K1 w - - 0 1"] [PlyCount "47"] {[#]} 1. Qd2 Ba5 2. Qh6 b4 3. cxb4 Bxb4 4. Qe3 Ba5 5. Kh2 Bb6 6. Qd2 Ng7 7. Qh6 Qf8 8. Qg5 Bd8 9. Qg4 Kh8 10. b4 Nxf5 11. Nxf5 Qg8 12. Qxg8+ Kxg8 13. Nxd6 Be7 14. Nf5 Bxb4 15. g4 Bc4 16. Kg3 Bd3 17. f4 Bxe4 18. fxe5 Bd2 19. Nd6 Bd5 20. h4 Kh7 21. Nf5 Be1+ 22. Kf4 Be6 23. Ke4 Bd2 24. h5 * [/pgn]