[Event "Rated Crazyhouse game"] [Site "https://lichess.org/SlFkqOJ5"] [Date "2018.05.05"] [Round "-"] [White "terra87"] [Black "mastertan"] [Result "0-1"] [WhiteElo "2388"] [BlackElo "2407"] [TimeControl "180+2"] [Termination "Normal"] [Variant "Crazyhouse"] [ECO "D02"] [Opening "Queen's Pawn Game: London System"] [StudyName "02 CWC Rnd 3"] [ChapterName "terra87 - mastertan rollercoaster"] [ChapterURL "https://lichess.org/study/8oJ3TAMe/AoPSO4zw"] [Annotator "https://lichess.org/@/Seirawan-Student"] [FEN "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR/ w KQkq - 0 1"] [SetUp "1"] [Orientation "black"] 1. d4 { [%clk 0:03:00] } 1... Nf6 { [%clk 0:03:00] } 2. Nf3 { [%clk 0:03:01] } 2... d5 { [%clk 0:03:02] } 3. Bf4 { [%clk 0:03:02] } 3... Bf5 { [%clk 0:02:59] } 4. e3 { [%clk 0:03:03] } 4... e6 { [%clk 0:02:59] } 5. Nbd2 { [%clk 0:03:04] } 5... Be7 { [%clk 0:02:57] } 6. Bb5+ { [%clk 0:03:05] } 6... c6 { [%clk 0:02:58] } 7. Bd3 { [%clk 0:03:05] } 7... O-O { [%clk 0:02:50] } 8. Bxf5 { [%clk 0:03:05] } 8... exf5 { [%clk 0:02:52] } 9. B@c7 { [%clk 0:03:05] } 9... Qxc7 { [%clk 0:02:52] } (9... Qc8 { Also fine. The Queen sac was perhaps unnecessary. }) 10. Bxc7 { [%clk 0:03:05] } 10... Nbd7 { [%clk 0:02:53] } (10... B@h5 11. O-O Nbd7 { [%cal Ge4h1] } 12. Be5) 11. Ne5 { [%clk 0:03:05] } 11... B@g6 { [%clk 0:02:49] } 12. O-O { [%clk 0:02:59] } 12... Rac8 { [%clk 0:02:36] } 13. Nxd7 { [%clk 0:02:56] } 13... Nxd7 { [%clk 0:02:34] } 14. Bf4 { [%clk 0:02:56] } 14... N@e6 { [%clk 0:02:23] } 15. N@e5 { [%clk 0:02:55] } 15... Nxe5 { [%clk 0:02:16] } 16. dxe5 { [%clk 0:02:55] } (16. Bxe5 { Often taking with pawn is best but notice here that Black cannot play f6 because of Q@d7 and moreover has no pawns in hand. This bishop is a good attacking piece and can be defended by a knight on f3 or d7. } 16... f6?? (16... B@f6 17. N@d7) (16... B@d6 17. Nf3) 17. Q@d7 B@f7 18. Qxe7 fxe5 19. dxe5 B@d8 20. Qxb7 Rc7 21. Qb4 c5 22. Qb5) 16... N@h5 { [%clk 0:02:01] } 17. Bg3 { [%clk 0:02:40] } 17... B@c7 { [%clk 0:01:44] } 18. Nf3 { [%clk 0:02:00] } 18... Nxg3 { [%clk 0:01:43] } 19. fxg3 { [%clk 0:02:01] } 19... B@h5 { [%clk 0:01:41] } 20. N@d7 { [%clk 0:01:51] } (20. N@f6+ { The direct move is stronger. The main purpose of N@d7 is to support a drop on f6. The pawn on f7 is over-defended so the rook is happy to move so dropping on d7 first leaves more of a liability than a strength. } 20... Kh8 21. Nxh5 Bxh5 22. N@f4 Nxf4 23. gxf4) (20. Q@d7 { Better still! } 20... Bc5 21. N@e7+ Bxe7 22. Qxe7 Rfe8 23. Qb4) 20... Rfd8 { [%clk 0:01:36] } 21. N@f6+ { [%clk 0:01:51] } 21... Kh8 { Taking would of course be a mistake! } { [%clk 0:01:35] } (21... gxf6 22. Nxf6+ Kh8 23. Nxh5 Bxh5 24. B@f6+ Bxf6 25. exf6) 22. Qe1 { [%clk 0:01:24] } 22... Bxf3 { [%clk 0:01:35] } 23. Rxf3 { [%clk 0:01:24] } 23... Bxe5 { This nice move clears away white's pieces at the cost of a piece for a pawn. But it's a slight mistake because black is not prepared yet for a use for that pawn and white can use the bishop to continue the attack. Better therefore is N@g5 first with a threat of @h3 once the pawn is captured. } { [%clk 0:01:36] } (23... N@g5! 24. B@e2 Bxe5 25. Nxe5 Bxf6 26. B@c3 (26. Nxg6+ fxg6 27. B@h4 P@h3) 26... Bxe5 27. Bxe5 N@g4 28. B@d4 Nxd4 (28... f6 { also sound }) (28... Nxf3+ { the most forcing but not the best continuation } { the following analysis is for the die-hard! } 29. Bxf3 P@f2+ 30. Qxf2 R@h1+ 31. Kxh1 Nxf2+ 32. Kg1 N@h3+ 33. gxh3 Nxh3+ 34. Kh1 P@g2+ 35. Kxg2 (35. Bxg2 Q@g1+ 36. Rxg1 Nf2#) 35... Q@f2+ 36. Kh1 (36. Kxh3 Ng5+ 37. Kh4 Nxf3+ 38. Kh3 Qxh2#) 36... Qxf3+ 37. P@g2 Qxg2+ { is unclear } (37... Nf2+ { Black has at least a draw. } 38. Kg1 Nh3+ 39. Kh1 (39. gxh3 B@f2+ 40. Kf1 Bxe3+ 41. Ke1 P@d2#)) 38. Kxg2 B@e4+ 39. Kf1 P@g2+ 40. Ke1 g1=Q+ 41. Kd2 f6 (41... Rg8 { is another way for black to defend, but the evaluation is unclear. Despite the material deficit, Black has considerable compensation. Truncation of a Stockfish line found by Vempele follows: } 42. Q@h6 Qxh2+ 43. P@e2 Qxg3 44. Bxg3 Nxd4 45. Qxh3 Ne6 46. R@h4 (46. P@h6 gxh6 47. Qxh6 P@g7 48. Qxg6 hxg6 49. N@e5 Q@c7 $13) 46... P@h6 47. N@e5 Rcf8 $13) 42. Bxf6 gxf6 43. Bxf6+ B@g7 44. N@e5 Qxe3+ 45. Kxe3 d4+ { is actually losing for black } (45... f4+ 46. Ke2 Nd4+ (46... Rd7 { Bxf6+ and f3+ are both losing for Black! } 47. Q@h4 Nd4+ 48. Kd1 P@e2+ 49. Kd2 Nf3+ 50. Nxf3 Bxf3 51. Bxg7+ Rxg7 52. Q@d8+ Rxd8 53. Qxd8+ B@g8 54. Qxg8+ Rxg8 55. B@e5+ N@g7 56. Bxg7+ Rxg7 57. R@c8+ B@g8 58. Rxg8+ Rxg8 59. B@d4+ { draw }) 47. Kd1 (47. Kd2 { may be losing for White } 47... Nf3+ 48. Ke2 (48. Nxf3 Bxf6 49. P@h6 (49. Q@g4 B@g7) 49... B@e3+ 50. Ke1 (50. Kd1 { #-7 }) (50. Ke2 { #-5 }) 50... Bf2+ 51. Kd1 { #-11 } (51. Kd2 Rg8 $19) (51. Kf1 P@g2+ 52. Kxg2 (52. Ke2 { #-7 }) 52... Bxf3+ 53. Kxf3 Rg8 $19)) 48... Nhg1+ 49. Kf2 fxg3+ (49... Nh3+ 50. Ke2 { draws }) 50. hxg3 P@e3+ 51. Kxe3 d4+ 52. Kf2 Nh3+ 53. Ke2 Nhg1+ 54. Kf2 Nh3+ 55. Ke2 d3+ 56. cxd3 Nhg1+ 57. Kf2 Nh3+ 58. Ke2 (58. Kf1? Nh2+ 59. Ke2 Bxd3+ 60. Ke3 Ng4+ 61. Kd2 { #-12 } (61. Kf3 { #-5 }) (61. Nxg4 Bxf6 $19)) 58... Nfg1+ 59. Kf1 P@g2+ 60. Ke1 Nf3+ 61. Ke2 g1=N+ 62. Kf1 Nh2+ 63. Ke1 Ngf3+ 64. Kd1 Rxd3+ 65. Kc1 P@d2+ 66. Kd1 Nf2+ 67. Ke2 Nd4+ 68. Kxf2 Rf3+ 69. Kg1 Rxf6 $19) 47... Bxc2+ 48. Kc1 Ne2+ 49. Kd2 P@e3+ 50. Ke1 P@d2+ 51. Kxe2 Bcd3+ 52. Kf3 Bde4+ { draws }) 46. Kd2 Bxf6 47. Nxg6+ hxg6 48. N@f7+ Kg8 49. Q@h7+!! { Mate in 19! } (49. Nh6+ { and white can force the draw if he did not have better }) 49... Kxh7 50. Q@h6+ Kg8 51. Qxg6+ Kf8 52. R@g8+ Ke7 53. Qxf6+ Kxf6 54. B@e5+ Kxf7 55. P@g6+ Kxg8 56. P@h7+ Kf8 57. h8=Q+ Ke7 58. B@f6+ Kd7 59. Qxd8+ Rxd8 60. R@d6+ Kc7 61. Rxe6+ Kc8 62. N@e7+ Kd7 63. Rd6+ Kc7 64. Rxc6+ Kd7 65. P@e6+ Ke8 66. P@f7+ Kf8 67. g7#) 29. Bxd4 (29. Bxg7+)) 24. Nxe5 { [%clk 0:01:18] } 24... Bxf6 { [%clk 0:01:37] } 25. B@c3 { [%clk 0:01:17] } 25... N@e4 { [%clk 0:01:34] } 26. Nxg6+ { [%clk 0:01:14] } 26... hxg6 { Taking towards the centre is the general rule, but here is an exception because BxB PxB would leave severe dark square weaknesses around the black king, so black ends up having to retreat his active knight as happened in the game. } { [%clk 0:01:36] } (26... fxg6 27. Bxf6 gxf6 28. B@e7 B@g7 29. Bxd8 Rxd8 30. Q@e7 N@g5 31. Rf1 Rf8 32. B@b4 P@h3) 27. Bxf6 { [%clk 0:01:14] } 27... Nxf6 { [%clk 0:01:38] } (27... gxf6 { also playable } 28. B@e7 B@g7 29. Bxd8 Rxd8 30. R@h4+ P@h5 (30... P@h7 31. Q@e7 N@e5) 31. Q@e7 B@g4) 28. B@e5 { [%clk 0:01:15] } 28... B@e7 { [%clk 0:01:39] } 29. B@c3 { [%clk 0:01:12] } 29... N@e4 { [%clk 0:01:37] } 30. B@d4 { [%clk 0:01:10] } 30... N@g4 { [%clk 0:01:34] } 31. Bxf6 { [%clk 0:00:55] } 31... Ngxf6 { [%clk 0:01:34] } 32. Bxf6 { [%clk 0:00:56] } 32... Nxf6 { [%clk 0:01:36] } 33. N@e5 { [%clk 0:00:46] } 33... B@g8 { [%clk 0:01:35] } 34. N@f4 { [%clk 0:00:42] } 34... Nxf4 { [%clk 0:01:29] } 35. Rxf4 { [%clk 0:00:40] } (35. gxf4 { slightly more active: it would have opened the queen diagonal & allowed White to start an attack down the h-file } 35... P@g4?? { is far too slow } (35... P@h7 36. Nxf7+ Bxf7 37. N@g5 B@e6 38. Q@e5 N@g4 39. Nxf7+ Bxf7 40. Qxe7 Rd7 41. Qxd7 Nxd7 42. Bxg7+ Kxg7 43. B@c3+ N@f6 44. P@g5 B@e7 45. P@h6+ Nxh6 46. gxh6+ Kxh6 47. Qh4+ N@h5 48. N@g3 Kg7 49. Qxh5 gxh5 50. B@h6+ Kg8 (50... Kxh6 51. Nxf5+ Kg6 52. N@h4#) 51. Nxf5 P@f2+ 52. Rxf2 Q@f8 53. R@h8+ Kxh8 54. P@g7+ Kg8 55. gxf8=Q+ Bxf8 56. N@e7+ Kh8 57. P@g7+ Bxg7 58. Bxg7#) 36. Nxf7+ Bxf7 37. N@g5 B@g8 38. Bxf6 Bxf6 39. Q@h7+ Bxh7 40. Nxf7+ Kg8 41. B@e6 B@d7 42. Nxd8+ Bxe6 43. R@e8+ B@f8 44. Rxf8+ Kxf8 45. Nxe6+ Kf7 46. Ng5+ Bxg5 47. N@e5+ Kg8 48. B@e6+ Kf8 49. B@d6+ Be7 50. Nd7+ Ke8 51. Nf6+ gxf6 52. P@d7+ Kf8 53. dxc8=Q+ Kg7 54. R@f7+ Kh6 55. Rxh7+ Kxh7 56. Qg8+ Kh6 57. Qh4+ Q@h5 58. B@g7#) 35... P@g5 { [%clk 0:01:16] } 36. Rf1 { [%clk 0:00:38] } 36... N@e4 { [%clk 0:01:16] } 37. N@e6 { [%clk 0:00:33] } 37... B@h6 { creative move exploiting the weakness on g6 } { [%clk 0:00:52] } (37... fxe6 38. Nxg6+ Kh7 39. Nxe7 B@h5 40. P@g6+) 38. Nxd8 { [%clk 0:00:25] } 38... Rxd8 { [%clk 0:00:54] } 39. R@c7 { [%clk 0:00:26] } 39... N@d7 { [%clk 0:00:26] } 40. Nxd7 { [%clk 0:00:22] } 40... Nxc3 { [%clk 0:00:27] } 41. Nxf6 { If instead knight back to e5, black has two pieces hanging } { [%clk 0:00:18] } 41... Bxf6 { [%clk 0:00:29] } 42. bxc3 { [%clk 0:00:18] } 42... Bxc3 { Bishop is protected by threat of a knight fork on e2 } { [%clk 0:00:30] } 43. Qe2 { [%clk 0:00:14] } 43... Bxa1 { [%clk 0:00:30] } 44. Rxa1 { [%clk 0:00:13] } (44. Rxf7! { Stockfish is desperate to drop a pawn on the 7th! } 44... Bxf7 45. P@e7 R@c8 (45... Rg8 46. N@d8 B@e8 47. N@d6 N@e5 48. Q@f8) 46. exd8=Q+ Rxd8 47. Q@e7) 44... N@c3 { [%clk 0:00:32] } 45. Qf2 { [%clk 0:00:13] } 45... P@b2 { [%clk 0:00:32] } 46. Rf1 { [%clk 0:00:14] } 46... Ne4 { [%clk 0:00:32] } 47. Qe2 { [%clk 0:00:11] } 47... b1=Q { [%clk 0:00:25] } (47... R@d2! { It is awkward to see how to defend... } 48. Q@e1 b1=Q 49. Q2xd2 Nxd2 50. Qxb1 Nxb1) 48. Rxb1 { [%clk 0:00:11] } 48... Nc3 { [%clk 0:00:27] } 49. Qf1 { [%clk 0:00:12] } 49... Nxb1 { [%clk 0:00:28] } 50. N@e5 { [%clk 0:00:14] } 50... B@e8 { [%clk 0:00:15] } 51. B@e7 { [%clk 0:00:11] } 51... Nd2 { [%clk 0:00:16] } 52. Qe2 { [%clk 0:00:11] } (52. P@h7! { followed by N@f6+ is crushing } 52... Bxh7 (52... Kxh7 53. N@f6+ (53. Bxd8 { also wins convincingly } 53... Nxf1 54. N@f8+ Kh8 55. Nfxg6+ fxg6 56. R@h7+ Kxh7 57. N@f8+ Kh8 58. Nexg6+ Bxg6 59. Nxg6+ Kh7 60. Q@h8+ Kxg6 61. Rxg7+ Kh5 (61... Bxg7 62. B@h5#) 62. Rxg5#) 53... gxf6 (53... Kh8 54. Q@f8 { threatening Qxg8++ } 54... gxf6 55. Qxh6+ Bh7 56. Bxf6+ Kg8 57. Qg7#) 54. N@f8+ Bxf8 (54... Kh8 55. Bxf6+ R@g7 56. Bxg7+ Bxg7 57. Rxf7 { Black's bishops are paralysed and mate will follow shortly. }) 55. Bxf8 P@g7 56. Bxg7 Kxg7 57. B@f8+ Kxf8 58. Q@h6+ R@g7 59. P@e7#) (52... Nxf1 53. hxg8=R+ Kxg8 54. B@h7+ Kxh7 55. N@f8+ Kg8 56. Q@h7#) 53. Q@f8+ R@g8 54. Qxe8 { and an eventual smothered mate on f7 is unstoppable }) 52... R@b1+ { [%clk 0:00:16] } 53. N@e1 { [%clk 0:00:12] } 53... R@f1+ { [%clk 0:00:17] } 54. Qxf1 { [%clk 0:00:13] } 54... Nxf1 { [%clk 0:00:19] } 55. Q@e2 { [%clk 0:00:13] } (55. R@f8! Q@h7 (55... Kh7 56. Rxg8 Kxg8 57. P@h7+ Kxh7 58. N@f8+ Kg8 59. Q@h7#) 56. N@d6 Rxd6 57. Rxe8 { smothered mate cannot be stopped }) 55... Q@d2 { [%clk 0:00:11] } 56. Qxd2 { [%clk 0:00:12] } 56... Nxd2 { [%clk 0:00:13] } 57. Q@e2 { [%clk 0:00:13] } 57... Rxe1+ { [%clk 0:00:13] } (57... Q@c1 { (or Q@a1 as Vempele noted during the game) Doubling up pressure: the threat is greater than its execution }) 58. Qxe1 { [%clk 0:00:13] } 58... Ne4 { [%clk 0:00:11] } (58... Q@c3 59. R@f8 N@h7 60. Rxg8+ Kxg8 61. B@d4 { unclear who is better }) 59. R@f8 { [%clk 0:00:12] } 59... N@e6 { [%clk 0:00:09] } 60. Rxg8+ { [%clk 0:00:11] } 60... Kxg8 { [%clk 0:00:11] } 61. Bxd8 { [%clk 0:00:11] } 61... R@f8 { [%clk 0:00:07] } 62. P@e7! { [%clk 0:00:09] } 62... Kh7 { [%clk 0:00:08] } 63. exf8=Q { [%clk 0:00:10] } 63... Nxf8 { [%clk 0:00:10] } 64. B@g8+ { [%clk 0:00:10] } 64... Kh8 { [%clk 0:00:10] } 65. Nxf7+?? { [%clk 0:00:08] } (65. Bxf7 { white takes with the wrong piece: losing a knight is treacherous for white } 65... P@f2+ (65... Bxf7 66. Nxf7+ Kh7 67. R@h8#) 66. Qxf2 Q@h1+ 67. Kxh1 Nxf2+ 68. Kg1 { Black has nothing! }) 65... Bxf7 { [%clk 0:00:10] } 66. Bxf7 { Black to move and mate! } { [%clk 0:00:10] } 66... P@f2+ { [%clk 0:00:11] } 67. Qxf2 { [%clk 0:00:09] } 67... Q@h1+ { [%clk 0:00:13] } 68. Kxh1 { [%clk 0:00:11] } 68... Nxf2+ { [%clk 0:00:14] } 69. Kg1 { [%clk 0:00:13] } 69... Q@e1+ { [%clk 0:00:16] } 70. R@f1 { [%clk 0:00:11] } 70... N@e2# { 0-1 Black wins by checkmate. } { [%clk 0:00:16] } 0-1