20...Nc4! variation in van Foreest vs L'Ami (Dutch Ch. 2017)
Posted: Sun Jul 09, 2017 3:24 pm
In the following position, Nc4!! is winning and hard to find by computers.
[d]1r2kb1r/p5p1/1np1p1N1/3pPnB1/1p1P2B1/qP6/2PQ1P1P/1K1R3R b k - 0 20
Video and posts about this sacrifice : https://lichess.org/forum/game-analysis ... win?page=1
Main variations in pgn :
[Event "Variation 20...Nc4!"]
[Site "-"]
[Date "2017.06.28"]
[White "Jorden van Foreest"]
[Black "Erwin L'Ami"]
[Result "1-0"]
1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nc3 e6 5. g4 Bg6 6. Nge2 Be7 7. Be3 Nd7 8.
Qd2 h5 9. Nf4 hxg4 10. Nxg6 fxg6 11. O-O-O Nh6 12. Be2 Nf5 13. Bxg4 Qa5 14.
a3 b5 15. Bg5 Bf8 16. Ne2 b4 17. Nf4 Nb6 18. b3 Qxa3+ 19. Kb1 Rb8 20. Nxg6
Nc4 (20. .. Rh7 21. Bxf5 exf5 22. e6 Na4 23. bxa4 b3 24. c3 b2 25. h4 Bd6
26. Kc2 Qxa4+ 27. Kd3 Qc4+ 28. Ke3 Rb3 29. Kf3 Rxc3+ 30. Kg2 Qb3 31. Rb1
Rc2 32. Rh3 Qc4 33. Qa5 Be7 34. Nxe7 Rxf2+ 35. Kxf2 Qc2+ 36. Qd2) 21. bxc4
(21. Qc1 Qa5 22. Be2 (22. Nxf8) 22. .. Rb6 23. Bxc4 dxc4 24. Qb2) 21. .. b3
22. c3 b2 23. Bxf5 (23. Nxh8) 23. .. exf5 (23. .. Rxh2 24. Qe1 Qa1+ 25. Kc2
b1=Q+ 26. Rxb1 Qa2+ (26. .. Rxb1 27. Qxb1) 27. Kd3 Rxb1 28. Qxb1 dxc4+ 29.
Ke4 Qe2+ 30. Be3 exf5+ 31. Kxf5 Qh5+ 32. Ke6 Qg4+ 33. Qf5 Qxf5+ 34. Kxf5
Rxh1 35. d5 cxd5 36. Bxa7) 24. c5 (24. cxd5 Rh3 25. Be3 Qa1+ 26. Kc2 Qa4+
27. Kb1 (27. Kd3) 27. .. c5) 24. .. Rxh2 25. Rhf1 1-0
Original game :
[pgn]
[Event "Dutch Championships"]
[Site "Amsterdam NED"]
[Date "2017.06.28"]
[EventDate "2017.06.26"]
[Round "3.2"]
[Result "1-0"]
[White "Jorden van Foreest"]
[Black "Erwin L'Ami"]
[ECO "B12"]
[WhiteElo "2606"]
[BlackElo "2610"]
[PlyCount "71"]
1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nc3 e6 5. g4 Bg6 6. Nge2 Be7
7. Be3 Nd7 8. Qd2 h5 9. Nf4 hxg4 10. Nxg6 fxg6 11. O-O-O Nh6
12. Be2 Nf5 13. Bxg4 Qa5 14. a3 b5 15. Bg5 Bf8 16. Ne2 b4
17. Nf4 Nb6 18. b3 Qxa3+ 19. Kb1 Rb8 20. Nxg6 Rh7 21. Bxf5
exf5 22. e6 Na4 23. bxa4 b3 24. c3 b2 25. h4 Bd6 26. Kc2 Qxa4+
27. Kd3 Qc4+ 28. Ke3 Rb3 29. Kf3 Rxc3+ 30. Kg2 Qb3 31. Rb1 Rc2
32. Rh3 Qc4 33. Qa5 Be7 34. Nxe7 Rxf2+ 35. Kxf2 Qc2+ 36. Qd2
1-0
[/pgn]
[d]1r2kb1r/p5p1/1np1p1N1/3pPnB1/1p1P2B1/qP6/2PQ1P1P/1K1R3R b k - 0 20
Video and posts about this sacrifice : https://lichess.org/forum/game-analysis ... win?page=1
Main variations in pgn :
[Event "Variation 20...Nc4!"]
[Site "-"]
[Date "2017.06.28"]
[White "Jorden van Foreest"]
[Black "Erwin L'Ami"]
[Result "1-0"]
1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nc3 e6 5. g4 Bg6 6. Nge2 Be7 7. Be3 Nd7 8.
Qd2 h5 9. Nf4 hxg4 10. Nxg6 fxg6 11. O-O-O Nh6 12. Be2 Nf5 13. Bxg4 Qa5 14.
a3 b5 15. Bg5 Bf8 16. Ne2 b4 17. Nf4 Nb6 18. b3 Qxa3+ 19. Kb1 Rb8 20. Nxg6
Nc4 (20. .. Rh7 21. Bxf5 exf5 22. e6 Na4 23. bxa4 b3 24. c3 b2 25. h4 Bd6
26. Kc2 Qxa4+ 27. Kd3 Qc4+ 28. Ke3 Rb3 29. Kf3 Rxc3+ 30. Kg2 Qb3 31. Rb1
Rc2 32. Rh3 Qc4 33. Qa5 Be7 34. Nxe7 Rxf2+ 35. Kxf2 Qc2+ 36. Qd2) 21. bxc4
(21. Qc1 Qa5 22. Be2 (22. Nxf8) 22. .. Rb6 23. Bxc4 dxc4 24. Qb2) 21. .. b3
22. c3 b2 23. Bxf5 (23. Nxh8) 23. .. exf5 (23. .. Rxh2 24. Qe1 Qa1+ 25. Kc2
b1=Q+ 26. Rxb1 Qa2+ (26. .. Rxb1 27. Qxb1) 27. Kd3 Rxb1 28. Qxb1 dxc4+ 29.
Ke4 Qe2+ 30. Be3 exf5+ 31. Kxf5 Qh5+ 32. Ke6 Qg4+ 33. Qf5 Qxf5+ 34. Kxf5
Rxh1 35. d5 cxd5 36. Bxa7) 24. c5 (24. cxd5 Rh3 25. Be3 Qa1+ 26. Kc2 Qa4+
27. Kb1 (27. Kd3) 27. .. c5) 24. .. Rxh2 25. Rhf1 1-0
Original game :
[pgn]
[Event "Dutch Championships"]
[Site "Amsterdam NED"]
[Date "2017.06.28"]
[EventDate "2017.06.26"]
[Round "3.2"]
[Result "1-0"]
[White "Jorden van Foreest"]
[Black "Erwin L'Ami"]
[ECO "B12"]
[WhiteElo "2606"]
[BlackElo "2610"]
[PlyCount "71"]
1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nc3 e6 5. g4 Bg6 6. Nge2 Be7
7. Be3 Nd7 8. Qd2 h5 9. Nf4 hxg4 10. Nxg6 fxg6 11. O-O-O Nh6
12. Be2 Nf5 13. Bxg4 Qa5 14. a3 b5 15. Bg5 Bf8 16. Ne2 b4
17. Nf4 Nb6 18. b3 Qxa3+ 19. Kb1 Rb8 20. Nxg6 Rh7 21. Bxf5
exf5 22. e6 Na4 23. bxa4 b3 24. c3 b2 25. h4 Bd6 26. Kc2 Qxa4+
27. Kd3 Qc4+ 28. Ke3 Rb3 29. Kf3 Rxc3+ 30. Kg2 Qb3 31. Rb1 Rc2
32. Rh3 Qc4 33. Qa5 Be7 34. Nxe7 Rxf2+ 35. Kxf2 Qc2+ 36. Qd2
1-0
[/pgn]