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| White has just captured on f5 in Ton Goris (2007) - Spanton (1862), Bregenz (Austria) Seniors 2017. Who stands better, and by how much? |
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White has four isolated pawns, two of which are doubled, but the key to this position is that White has a fast-moving passed pawn while Black's passer is well-watched by the white king. The engines Stockfish12 and Komodo12.1.1. agree White is winning.
41...g6 42.b5!?
Komodo12.1.1. reckons 42.gxf6+ is just as convincing, but Stockfish12 much prefers the text.
42...Na5 43.fxg6+ Kxg6
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44.Kd1
Not 44.Kd2?? Nb3+.
44...Kf5
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45.Bd6?
Preventing 45...Kf4, but the correct way to do this is 45.Be3.
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45...h5
This probably draws, but clearer seems to be the engines' 45...Nc4!, eg 46.Bc7 Ke6 47.b6 Kd7.
46.Bc7
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46...Nb7
Correct is 46...Nc4 47.b6 Nxb6! 48.Bxb6 Kf4, which Komodo12.1.1 reckons wins for White, but Stockfish12 is almost certainly correct in calculating it as a draw, eg 49.Bc7+ Kxf3 50.Kd2 f5 51.Kxd3 f4 52.Kd4 h4 53.Be5 Kg4 54.Ke4 f3 55.Ke3 Kh3! 56.Kf2 (56.Kxf3 is stalemate) Kg4 etc.
47.Kd2 Ke6 48.Kxd3 Kd5 49.Ke3 Nc5 50.b6 f5 51.Kf4 Ke6 52.Kg5 Nb7 53.f4 1-0
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