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Parham Maghsoodloo vs Vadim Moiseenko
Tradewise Gibraltar (2018), Catalan Bay GIB, rd 1, Jan-09
Zukertort Opening: Symmetrical Variation (A04)  ·  1-0



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Kibitzer's Corner
Premium Chessgames Member
  g15713: "If both sides have connected passed pawns, the result is often difficult to foresee." Y. Averbakh and N. Kopayev

Black to move. Last: 51.Re8

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Black should now take the pawn with 51...Rxh4 instead of game continuation 51...Rh3+ why allow the White King to advance with tempo to support his pawns?

Stockfish analysis has this as equal after 51...Rxh4

1) +0.08 (46 ply) 52.d4 Rh3+ 53.Kd2 Kf7 54.Rc8 Rh2+ 55.Kd3 Rh3+ 56.Ke2 g5 57.d5 Rh4 58.Rc7+ Kf6 59.Rc6+ Kg7 60.Ke3 Rh1 61.Kf2 Rd1 62.Ke2 Rd4 63.Ke3 Rd1 64.Rc4 g4 65.Ke2 g3 66.Rc3 Rg1 67.Rd3 g2 68.Kf2 Rb1 69.Kxg2 Kf6 70.Kf3 Ke5 71.Re3 Rf1+ 72.Ke2 Ra1 73.Rd3 Ra8 74.Kf3 h5 75.Rd2 Rb8 76.Ke3 h4 77.Kf3 Rb6 78.Kg4 h3 79.Kg5 Kxe4 80.d6 h2

2) =0.00 (46 ply) 52.e5+ Kf5 53.d4 Re4+ 54.Kd3 Re1 55.Rh8 h5 56.Kc4 g5 57.Rxh5 Ra1 58.Rh8 Ra4+ 59.Kc5 Ra5+ 60.Kd6 Ra6+ 61.Kd7 Ra4 62.Rf8+ Ke4 63.e6 Rxd4+ 64.Kc6 Rc4+ 65.Kb5 Rc7 66.Rf7 Rc8 67.e7 Re8 68.Kc6 Ke5 69.Kd7 Rxe7+

3) =0.00 (46 ply) 52.Rc8 h5 53.Rc6+ Kf7 54.d4 g5 55.d5 Rh1 56.Rh6 Re1+ 57.Kf3 h4 58.d6 Kg7 59.Re6 Kf7 60.Re5 Rd1 61.Rxg5 Rxd6 62.Rf5+ Ke6 63.Kg4 Rd1 64.Kxh4

After game continuation 51...Rh3+ we have the following:

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52.Kd4 Rxh4 53.Kd5 g5 54.e5+

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and now 54...Kg7! draws instead of 54...Kf7?

Stockfish analysis:

1) =0.00 (38 ply) 54...Kg7 55.Ra8 Rh3 56.d4 g4 57.Ra7+ Kg6 58.Ra1 Rd3 59.Re1 Kf7 60.Ke4 Rd2 61.Rg1 h5 62.d5 Kg6 63.e6 Kf6 64.Rf1+ Kg7 65.Rf5 h4 66.Rg5+ Kf6 67.Rxg4 h3 68.Rh4 h2 69.Rh7 Kg6 70.Rh8 Kf6 71.Rh6+ Ke7 72.Ke5 Re2+ 73.Kd4 Kd6 74.Rh7 Rd2+ 75.Kc4 Rxd5 76.e7 Re5 77.Rxh2

2) +5.80 (37 ply) 54...Kf7 55.Rh8 Ra4 56.Rxh6 Ra5+ 57.Ke4 Ra1 58.d4 g4 59.Rf6+ Ke7 60.Rg6 Rg1 61.d5 Re1+ 62.Kf5 Rf1+ 63.Kxg4 Rg1+ 64.Kf5 Rf1+ 65.Ke4 Re1+ 66.Kd4 Rd1+ 67.Kc5 Rc1+ 68.Kb5 Rb1+ 69.Kc6 Rc1+ 70.Kb7 Rd1 71.d6+ Kd7 72.Rg7+ Ke6 73.Re7+ Kd5 74.e6 Rb1+ 75.Kc7 Rc1+ 76.Kd7 Ra1 77.Rf7 Ra7+ 78.Kc8 Ra3 79.d7 Rc3+ 80.Kb7 Rb3+ 81.Kc7 Rc3+ 82.Kb6 Rb3+ 83.Ka5

3) +132.55 (37 ply) 54...Kg6 55.e6 Rf4 56.Rh8 Kf6 57.Rxh6+ Kg7 58.e7 Kxh6 59.e8=Q Rf2 60.d4 Rf1 61.Qc6+ Kh5 62.Ke4 Re1+ 63.Kf3 Rf1+ 64.Ke3 Re1+ 65.Kf2 Rb1 66.Qe8+ Kh6 67.d5 Rb2+ 68.Ke3 Rb1 69.Qe6+ Kh5 70.Qc6 Re1+ 71.Kf2 Re4 72.Kf3 Rf4+ 73.Ke3 Rg4 74.d6 Rb4 75.d7 Rb3+ 76.Kd4 Rb8 77.Ke5 Rd8 78.Qf6 Rb8 79.d8=Q Rb5+ 80.Ke4 Rb4+ 81.Ke3 Rb3+ 82.Qd3 Rxd3+

Just to double check, I ran Stockfish for an hour after 54...Kg7! Black prevents 55.Rh8 while at same time keeps a close eye on White's pawns.

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Stockfish analysis:

1) =0.00 (50 ply) 55.Re7+ Kg6 56.Re8 Kg7 57.Rb8 Rh3 58.Rb7+ Kg6 59.d4 g4 60.Rb1 Ra3 61.Ke4 Ra4 62.Rf1 Ra2 63.Re1 g3 64.Kf3 g2 65.e6 Kf6 66.e7 Ra8 67.d5 g1=Q 68.Rxg1 Kxe7 69.Ke4 Kd6 70.Rg6+ Kd7 71.Rxh6

2) =0.00 (49 ply) 55.Ra8 Rh3 56.d4 g4 57.Ra1 h5 58.Re1 Ra3 59.e6 Kf8 60.Kd6 g3 61.d5 h4 62.Kc7 Ke8 63.d6 Rc3+ 64.Kb7 g2 65.Ra1 Rb3+ 66.Kc6 Rb8 67.e7 Kf7 68.Re1 Rc8+ 69.Kd7 Re8 70.Kc7 h3 71.d7 h2 72.d8=Q g1=Q 73.Qd5+ Kg7 74.Qe5+ Kg8 75.Qe6+ Kh8 76.Qh6+ Kg8 77.Rxg1+ hxg1=Q 78.Qe6+ Kh7 79.Qf7+ Kh6 80.Qxe8

3) =0.00 (49 ply) 55.Rb8 Rh3 56.Rb7+ Kg6 57.d4 g4 58.Rb1 Ra3 59.Ke4 Ra4 60.Rf1 Ra2 61.Re1 g3 62.Kf3 g2 63.e6 Kf6 64.e7 Ra8 65.d5 g1=Q 66.Rxg1 Kxe7 67.Ke4 Kd6 68.Rg6+ Kd7 69.Rxh6

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