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Evgeny Najer vs Shakhriyar Mamedyarov
European Club Cup (2017), Antalya TUR, rd 7, Oct-14
Spanish Game: Closed. Averbakh Variation (C87)  ·  0-1

ANALYSIS [x]

FEN COPIED

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sac: 42...Re4+ PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
Oct-14-17  Andrew Chapman: I think after Rf8 black queens and then checks on a2.
Oct-16-17
Premium Chessgames Member
  ajk68: Short computer analysis indicates that 42...Re4+ leads to an = position. A deeper analysis shows a significant advantage for black.

Here is an instance where the GM's positional instincts outweigh what can probably be computed in his head.

White to move
1) -1.18 (37 ply) 43.Bxe4 fxe4 44.Rc1 b6 45.Rfd1 d4 46.Rc4 Rd8 47.Kf1 Rd5 48.Kg2 Kf5 49.Re1 d3 50.e6 d2 51.Rd1 e3 52.Kf3 Kxe6 53.Ke2 Kf5 54.Rg1 Rd8 55.Rd1 Rc8 56.Rg1 Re8 57.Rc3 Rd8 58.Rc4 Rd6 59.Rf1 Rd7 60.Rd1 Kg4 61.f5+ Kxf5 62.g4+ Ke5 63.gxh5 gxh5 64.Rxc5+ bxc5 65.Kxe3 Rd4 66.Rxd2 Rxh4 67.Rd3 Rg4

2) -2.64 (37 ply) 43.Kd2 Bb4+ 44.Kc1 Rc8 45.Kb1 Re3 46.Rd3 Rc3 47.Rfd1 Rxg3 48.Rxd5 Rg4 49.R5d4 Bc5 50.R4d3 Rxd3 51.Bxd3 Rxh4 52.Bc4+ Ke7 53.Rf1 Be3 54.Rd1 Bxf4 55.Rd5 Rh1+ 56.Kc2 h4 57.Rb5 h3 58.Rxb7+ Kd8 59.e6 Re1 60.Rd7+ Kc8 61.Bd5 h2 62.Rh7 Re5 63.Bc4 g5 64.Kc3 Re1 65.Bd3 h1=Q 66.Rxh1 Rxh1 67.Bxf5 Be5+ 68.Kc4

Oct-16-17
Premium Chessgames Member
  ajk68: To complete the story a bit, here is what Stockfish thinks at 24 ply before making the move, and then what it thinks at 41 ply.

1) -0.20 (24 ply) 42...Rc8 43.Rf3 Bd4 44.Bb1 Rc5 45.Rfd3 Bb2 46.Ba2 b6 47.Kf3 b5 48.R1d2 Bc1 49.Rd1 d4 50.Rxd4 Rxd4 51.Rxd4 Rc3+ 52.Ke2 Rxg3 53.b4+ Ke7 54.Bd5 Be3 55.Rd3 Bxf4 56.bxa5 bxa4

1) -1.36 (41 ply) 42...Re4+ 43.Bxe4 fxe4 44.Rc1 b6 45.Rfe1 Rd8 46.Kf1 Kf5 47.Kg2 d4 48.Rc4 Rd5 49.e6 Rd6 50.e7 Re6 51.Kf1 Kg4 52.Kg2 e3 53.f5 Kxf5 54.Kf3 Rxe7 55.Ke2 Re6 56.Rg1 Re4 57.Rf1+ Kg4 58.Rf6 Kxg3 59.Rc1 Rg4 60.Rg1+ Kxh4 61.Rxg6 Kh3 62.Kd3 Rxg1 63.Rxg1 h4 64.Rg5 Kh2 65.Ke2 h3 66.Rg6 Ba3 67.Rxb6

Apr-17-18
Premium Chessgames Member
  Mateo: Beautiful exchange sacrifice by Mamedyarov. The way he played the ending since 42...Re4+!! until the end was highly interesting. The two connected pawns in the center supported by the King were too strong.

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