Test Position bm Rxc3
Posted: Tue May 07, 2019 6:36 am
This position arised after SF10 played 27.Kf2 and the winning response for black(Lc0) is [bm 27...Rxc3!]
[d]1kr1b3/pr6/3pq3/n2p1p2/3P1Pp1/P1N1P1Pp/RP1NQK1P/4R3 b - - 3 27
I tried to analyze where SF10 went wrong after Rxc3, but looks like it made excellent defense but is really lost after exchange sacrifice of black.
Positional dominance of black as white rooks are tamed by minor pieces. N stronger than R on this setup, and bad bishop nicely activated.
Similar to one of those brilliancy games of top GMs. This positional exchange sacrifice is deep.
Complete game:
[pgn] [Event "?"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "Stockfish 10 181129"] [Black "Lc0 0.21.1 N:42100"] [Result "0-1"] [TimeControl "5400+5"] [SetUp "1"] [FEN "rn1qkbnr/ppp2ppp/8/3p1b2/3P4/5N2/PP2PPPP/RNBQKB1R w KQkq - 0 1"] [Termination "normal"] [PlyCount "141"] 1. Qb3 Nc6 2. Bg5 f6 3. Bd2 Qd7 4. Nc3 O-O-O 5. Na4 Bd6 6. e3 Nge7 7. a3 h5 8. Bb4 Kb8 9. Bxd6 cxd6 10. Nc3 h4 11. Nd2 Qe6 12. Ba6 Na5 13. Qb5 Rd7 14. Qxa5 bxa6 15. Qxa6 h3 16. g3 Rb7 17. Ra2 g5 18. O-O Rc8 19. Re1 Bg6 20. Qf1 Nc6 21. Raa1 Ka8 22. Ra2 Kb8 23. f3 Na5 24. Qf2 f5 25. f4 g4 26. Qe2 Be8 27. Kf2 Rxc3 28. bxc3 Bb5 29. Qd1 Bc4 30. Rc2 Bd3 31. Ra2 Nc4 32. Qa1 Kc7 33. Kg1 a5 34. Qd1 Nb2 35. Qc1 Na4 36. Qd1 Qe8 37. Nf1 Qb5 38. Rf2 Nb2 39. Qa1 a4 40. Rc1 Nc4 41. Rd1 Bxf1 42. Rdxf1 Qe8 43. Qd1 Rb3 44. Qc2 Qe4 45. Ra1 Kc6 46. Re2 Kb6 47. Qc1 Kb5 48. Rf2 Qd3 49. Qc2 Qxc3 50. Qxc3 Rxc3 51. Rfa2 Nxe3 52. Rb2+ Rb3 53. Rd2 Nc4 54. Rda2 Nb2 55. Rc1 Nd3 56. Rd1 Rc3 57. Re2 Kc4 58. Re7 Rxa3 59. Rc7+ Kxd4 60. Rc2 Rc3 61. Ra2 a3 62. Rda1 Ke4 63. Rxa3 d4 64. Ra6 Kd5 65. R6a2 Nc5 66. Kf2 Rb3 67. Ke2 Ke4 68. Kf2 d3 69. Ra4+ Nxa4 70. Rxa4+ Kd5 71. Ke3 0-1 [/pgn]
[d]1kr1b3/pr6/3pq3/n2p1p2/3P1Pp1/P1N1P1Pp/RP1NQK1P/4R3 b - - 3 27
I tried to analyze where SF10 went wrong after Rxc3, but looks like it made excellent defense but is really lost after exchange sacrifice of black.
Positional dominance of black as white rooks are tamed by minor pieces. N stronger than R on this setup, and bad bishop nicely activated.
Similar to one of those brilliancy games of top GMs. This positional exchange sacrifice is deep.
Complete game:
[pgn] [Event "?"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "Stockfish 10 181129"] [Black "Lc0 0.21.1 N:42100"] [Result "0-1"] [TimeControl "5400+5"] [SetUp "1"] [FEN "rn1qkbnr/ppp2ppp/8/3p1b2/3P4/5N2/PP2PPPP/RNBQKB1R w KQkq - 0 1"] [Termination "normal"] [PlyCount "141"] 1. Qb3 Nc6 2. Bg5 f6 3. Bd2 Qd7 4. Nc3 O-O-O 5. Na4 Bd6 6. e3 Nge7 7. a3 h5 8. Bb4 Kb8 9. Bxd6 cxd6 10. Nc3 h4 11. Nd2 Qe6 12. Ba6 Na5 13. Qb5 Rd7 14. Qxa5 bxa6 15. Qxa6 h3 16. g3 Rb7 17. Ra2 g5 18. O-O Rc8 19. Re1 Bg6 20. Qf1 Nc6 21. Raa1 Ka8 22. Ra2 Kb8 23. f3 Na5 24. Qf2 f5 25. f4 g4 26. Qe2 Be8 27. Kf2 Rxc3 28. bxc3 Bb5 29. Qd1 Bc4 30. Rc2 Bd3 31. Ra2 Nc4 32. Qa1 Kc7 33. Kg1 a5 34. Qd1 Nb2 35. Qc1 Na4 36. Qd1 Qe8 37. Nf1 Qb5 38. Rf2 Nb2 39. Qa1 a4 40. Rc1 Nc4 41. Rd1 Bxf1 42. Rdxf1 Qe8 43. Qd1 Rb3 44. Qc2 Qe4 45. Ra1 Kc6 46. Re2 Kb6 47. Qc1 Kb5 48. Rf2 Qd3 49. Qc2 Qxc3 50. Qxc3 Rxc3 51. Rfa2 Nxe3 52. Rb2+ Rb3 53. Rd2 Nc4 54. Rda2 Nb2 55. Rc1 Nd3 56. Rd1 Rc3 57. Re2 Kc4 58. Re7 Rxa3 59. Rc7+ Kxd4 60. Rc2 Rc3 61. Ra2 a3 62. Rda1 Ke4 63. Rxa3 d4 64. Ra6 Kd5 65. R6a2 Nc5 66. Kf2 Rb3 67. Ke2 Ke4 68. Kf2 d3 69. Ra4+ Nxa4 70. Rxa4+ Kd5 71. Ke3 0-1 [/pgn]