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Arturo Pomar vs Ulf Andersson
Palma de Mallorca (1972), Palma ESP, rd 4, Dec-01
English Opening: Symmetrical. Anti-Benoni Variation Spielmann Defense (A32)  ·  0-1

8
7
6
5
4
3
2
a
1
b
c
d
e
f
g
h
White to move.
ANALYSIS [x]
Notes by Stockfish 11 (minimum 6s/ply)better is 2.Nf3 e6 3.Nbd2 d5 4.b3 Bd6 5.e3 O-O 6.Bb2 Nbd7 = +0.30 (42 ply) 2...e6 3.Nf3 d5 4.Nc3 c6 5.e3 Nbd7 6.Qc2 Bd6 7.Bd3 = -0.27 (36 ply) ⩲ +0.53 (41 ply) after 3.d5 b5 4.Nf3 b4 5.Nbd2 g6 6.e4 d6 7.Bd3 Bg7 8.O-O better is 5...d5 6.cxd5 Nxd5 7.Bd2 Be7 8.e3 O-O 9.Be2 Nf6 = -0.29 (30 ply)better is 6.Qb3 Bc5 7.Be3 b6 8.Rd1 O-O 9.Bg5 Bb7 10.Qc2 Nc6 = +0.33 (30 ply)= -0.23 (33 ply)better is 8.a3 Bc5 9.Nxc6 bxc6 10.Na4 Be7 11.Be2 d5 12.O-O Ba6 = +0.18 (30 ply)= -0.32 (29 ply)better is 9...b6 10.Nxc6 dxc6 11.Qc2 Qc7 12.h3 Bb7 13.Rad1 Rfd8 = -0.27 (34 ply)= +0.47 (32 ply) 10...Qc7 11.Rac1 Bd7 12.Rfd1 Rac8 13.Nxc6 bxc6 14.Bf3 e5 = 0.00 (35 ply) ⩲ +0.77 (34 ply)better is 12...Nc6 13.Nxc6 bxc6 14.e4 c5 15.Bf4 Qb6 16.Rd2 Bb7 = +0.29 (32 ply) ⩲ +0.83 (33 ply) after 13.Qd3 Nc6 14.e4 Bd7 15.Rac1 Ne5 16.Qg3 Rac8 17.b3 Ng6 16.Qd3 Nc6 17.Nxc6 Bxc6 18.Bb4 Rfd8 19.Bxd6 Qb6 20.Rb1 ⩲ +1.02 (35 ply)better is 16...Rfd8 17.Qd2 b6 18.Bc3 Nb7 19.Bf3 Nc5 20.b3 Qb8 21.h3 = 0.00 (37 ply)better is 17.Bc3 Nxc4 18.b3 Ne5 19.Bxa6 Ra8 20.Be2 Rfc8 21.Qd2 Qb7 ⩲ +0.54 (32 ply)= 0.00 (39 ply)better is 18.b3 Rfd8 19.Bf3 Nc5 20.Bc3 Qb8 21.h3 b5 22.cxb5 axb5 ⩲ +0.54 (26 ply) 18...Rfd8 19.b3 Qb8 20.Bc3 Nc5 21.Qb2 Be5 22.h3 Bf6 = 0.00 (38 ply) 19.Ba3 Rfd8 20.b4 Ba4 21.Re1 Nc5 22.Ne2 Bf6 23.Nc3 Bxc3 ⩲ +0.78 (34 ply)better is 19...h6 20.Rc2 Rfe8 21.g3 Bg5 22.Qe1 Bf6 23.b3 Nc5 24.Qd2 = 0.00 (38 ply) ⩲ +0.55 (35 ply)better is 21.b3 Nc5 22.Bg2 Be7 23.Bc3 Bf6 24.h4 Qb8 25.Ne2 Bxc3 ⩲ +0.74 (27 ply)better is 21...Be7 22.Bc3 Nc5 23.b3 h6 24.Nc2 Bc6 25.Qe2 Nd7 26.Nd4 = +0.02 (23 ply)better is 22.Qe2 Nc5 23.h4 h6 24.Kh2 Be7 25.Qe3 Bf6 26.b3 Re8 ⩲ +0.64 (28 ply) 22...Nc5 23.h4 Re8 24.b3 h6 25.Rc2 d5 26.e5 a5 27.Ba3 = 0.00 (36 ply) ⩲ +1.30 (34 ply) 24.Bf1 Nc5 25.e5 dxe5 26.Nf3 e4 27.Ng5 h6 28.Bxc5 Bxc5 ⩲ +1.20 (35 ply)= +0.34 (33 ply) after 24...e5 25.a3 Qa8 26.Bf1 Rxc1 27.Nxc1 Nc5 28.f3 Na4 better is 26.Qb6 Rxc1+ 27.Nxc1 Qc8 28.Ne2 Nc5 29.Nc3 Na4 30.Nxa4 ⩲ +0.67 (42 ply)= 0.00 (34 ply)better is 36.Bb4 Kg7 37.Kh1 Qb6 38.Kg1 = 0.00 (42 ply) ⩱ -0.71 (33 ply) after 36...Qa7+ 37.Kh1 Ne3 38.Bb4 Nc4 39.Qc2 Bd7 40.b3 Ne3 38.Nh3 Nc4 39.Qc2 Qe3 40.Nf2 d5 41.exd5 Bxd5 42.Nd1 Qb6 = -0.36 (34 ply) ⩱ -1.34 (42 ply) 40.Be1 Qd4 41.Bc3 Qe3 42.Qxe3 Nxe3 43.Bd2 Nd1 44.b3 Nf2+ ⩱ -0.83 (37 ply) 40...Nxa3 41.fxe5 dxe5 42.Nxf7 Kxf7 43.Qf3+ Bf6 44.bxa3 -+ -2.89 (34 ply) ⩱ -0.62 (33 ply) 42...Qc5 43.Bb4 Qa7 44.Kh2 Ne3 45.Qd2 Qd4 46.fxe5 dxe5 ⩱ -0.94 (33 ply)= 0.00 (44 ply) 51.Nd3 Kd6 52.Kg1 Nc4 53.Bf1 Bd7 54.Kf2 Nd2 55.Bg2 Be6 = 0.00 (42 ply) ⩱ -0.85 (35 ply) after 51...Nd1 52.b4 Nc3 53.Bh3 Nb1 54.g4 Nxa3 55.gxh5 gxh5 56.a4 Ke5 57.axb5 Bxb5 58.Bf7 e3 59.Bxg6 Nxg3 60.Bd3 = 0.00 (44 ply) 56...e3 57.Nb3 Bd5 58.Nc5 Ke5 59.Bd3 Nxg3 60.Bxb5 Nf5 -+ -4.51 (34 ply) 57.a4 bxa4 58.Bxa4 Bxa4 59.Nxa4 Nxg3 60.Kf2 Nf5 61.b5 = 0.00 (48 ply)-+ -4.42 (37 ply) 58.Bb1 Nd6 59.Ba2 Kc3 60.Ke2 Kb2 61.Be6 Kxa3 62.Na6 Kb2 -+ -4.29 (35 ply)-+ -11.53 (37 ply) 62.Nb6+ Kxb4 63.Ke2 Kc5 64.Nd7+ Kd5 65.Kd3 Ke6 66.Nf8+ -+ -4.34 (38 ply)-+ -11.48 (32 ply)-+ mate-in-16 after 75.Kf2 Ng6 76.Ke3 Nh8 77.h7 Ke5 78.Ke2 Kf4 79.Kd182.Kh2 Kf2 83.Kh3 g1=Q 84.Kh4 Qg6 85.Kh3 Qh5# -+ mate-in-40-1

rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1
FEN COPIED

Annotations by Stockfish (Computer).      [35435 more games annotated by Stockfish]

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Kibitzer's Corner
Sep-05-06
Premium Chessgames Member
  Mateo: Accurate technical win.

61.Nxa4 Kc4 62.Ke2 Kxb4 63.Nb6 Kc5! <63... Nxg3+? 64. Kxe3 Nf5+ (64... Kc5 65. Nd7+ Kd6 66. Nf8 Nf5+ 67. Kf4 Nxh4 68. Kg5 Nf3+ 69. Kf4! Ke7 70. Nxg6+ Kf6 71. Nf8 Ng1 72. Nd7+ Kg6 73. Ne5 Kh6 74. Ng4+! Kg7 75. Kg5! draw) 65. Kf4 Nxh4 66. Nd5+ Kc4 67. Nf6 Ng3 58. Kg3 Ne3 59. Nxh5! g5 (59... gxh4 60. Kh4) 60. Nf4!, draw.> Nf3+ 67. Kxg6 h4 68. Nd5+, draw.> 64.Nd7+ Kd5! 65.Kf3 <65. Kd3 Ke6 66. Nf8+ Kf7 67. Nd7 Nxg3 68. Kxe3 Nf5+ 69. Ke4 Nxh4, Black wins.> Kd4 66.Nf8 Kd3 67.Nxg6 Nd4+ 68.Kg2 e2 69.Nf4+ Ke3 70.Nxe2 Nxe2 71.g4 hxg4 72.h5 Ke4 73.h6 Nf4+ 74.Kg3 Kf5 75.h7 Ng6 76.Kg2 Kf4 77.Kf2 g3 78.Kg2 Kg4 79.Kg1 Kf3 80.Kf1 g2 81.Kg1 Nh8 0-1

Feb-02-11  madhatter5: Ulf Andersson is a genius. He develops, provokes miniscule pawn weaknesses, and then moves all his pieces backwards to drive his opponents insane. They then start to go crazy, and let him reach an endgame where those miniscule weaknesses will be exploited in 80-something moves. AMAZING!
Oct-20-11  Old King Cole: Fine artistic endgame by the Swedish GM as black here, using the KP/K stalemate (and its avoidance) theme, defying Zugzwang, and blocking. A good study would push it up 12-13 moves for a [black] to play and win.

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