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| White has just captured on e2 in Manfred Sonntagbauer (1431) - Spanton (1854), Mariánské Lázně Seniors 2020. Who stands better, and by how much? |
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Black has two isolated pawn, and there are rival pawn-majorities, a fact that usually favours a bishop. But the black queenside pawns are not targets for the bishop, and White's queenside dark squares are weak. The analysis engine Stockfish12 rates the position as equal, but Komodo12.1.1 gives a slight edge to Black.
30...Ne4 31.Bd3 Nd6
31...Nc3?! is risky, eg 32.a3 a5 (more-or-less required to stop the white queenside pawns rolling) 33.Kf2, when the engines reckon Black must play 33...a4 34.bxa4 Nxa4, after which White has a passed pawn and the more-centralised king.
32.g4!?
Not 32,Bxh7?? g6, but the immediate 32.Kf2 is natural.
32...h6 33.Kf2 Ke7 34.Kf3!?
Probably a tad better is is 34.Ke3, which leaves the king better placed to react to activity on the queenside.
34...Kf6!?
And here 34...Ke6 is probably better, for the same reason as in the previous note.
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35.h4?
It cannot be right to let the black king advance to the fourth rank. I was expecting 35.Kf4, when I intended 35...g5+!? 36.Ke3 Ke5, when the black king has reached the fourth rank but the black pawn-majority is compromised.
The engines give 35.b4!? cxb4 36.c5 Ne8 37.Ke4 when White has full compensation for the pawn, but Black is holding on with 37...Nc7.
35...Ke5 36.Ke3
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36...Nc8?
Planning to redeploy via e7 and c6 to d4 or b4, but it is too slow. The engines reckon Black is winning after 36...f5.
37.a3 a5
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38.a4?
Completely the wrong idea. The engines reckon Black is only slightly better after 38.h5.
The game finished:
38...Ne7 39.Bc2 f5 40.Kf3 fxg4+ 41.Kxg4 Nc6 42.Kh5 Ne7 43.Kg4 g6 44.h5 g5 45.Bb1 Nc6 0-1
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