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| White has just captured on e3 in Spanton (1934) - Andre Nicolas Heidel (2178), Malta (BuÄĦibba) 2019. Who stands better, and by how much? |
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The position is dead-equal, according to the analysis engines Stockfish12 and Komodo12.1.1.
33...b5 34.e4 Ke6
34...dxe4+? spends a tempo giving White a protected passed pawn while helping the white king to advance.
However the engines prefer 34...Ne7!? 35.Bxe7 Kxe7 36.exd5 Kd6 37.Ke4 a4 38.a3 Ke7, which they reckon is dead-equal despite White's extra pawn.
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35.a4?
The right idea, but the wrong move-order. Correct is 35.exd5+ Kxd5 36.a4! bxa4 37.c4+ with advantage.
35...dxe4+ 36.Kxe4 f5+
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37.Kf4?
Correct is 37.gxf5+ gxf5+ 38.Ke3! bxa4 39.Ba3 with approximate equality. Note that 38.Kf4? loses to 38...Ne7, eg 39.Bxe7 Kxe7 40.Ke3 (or 40.axb5 a4 41.b6 Kd7 etc) bxa4, when Black queens either the f5 or a4 pawn.
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37...bxa4?
Winning is 37...fxg4 38.hxg4 bxa4, eg 39.c4 Ne7 40.Bg7 Kf7 41.Be5 Nc6 42.Bh8 a3 43.d5 Nb4 44.Ke5 Ke7 45.Bf6+ Kd7 46.c5 a2 47.c6+ Kc8 48.Ke6 h5 49.gxh5 gxh5 50.Be5 h4 51.c7 Nxd5! 52.Kxd5 h3 etc. There are many plausible alternatives, but Black is winning in all of them, according to the engines, whereas the text restores dead-equality.
38.gxf5+ gxf5 39.Ba3 Ne7 40.c4 Ng6+ 41.Kf3 Kd7 42.Ke3 Ne7 43.d5 Ng6 44.c5
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44...Ne5!?
This active-looking move is probably good enough to hold the draw. The engines give 44...f4+ 45.Ke4 f3! 46.Kxf3 Ne5+ 47.Ke4 Nc4 48.c6+ Kc7 49.Bc5 a3 50.Kd3 Ne5+ 51.Kc2 a2! 52.Bd4 (52.Kb2?? Nd3+) Nc4 53.Kd3 Nd6, with the verdict still dead-equality.
45.Kd4 Nf3+
This is best, according to the engines.
46.Kd4
More interesting is 46.Kc3!?, as the next note explains.
46...f4?
Best, according to the engines, is 46...Ne5+, after which White 47.Kd4 (47.Kb5 f4) Nf3+ 48.Kc3!? Ne5 49.c6+ seems to be a draw after 49...Nxc6! 50.dxc6+ Kxc6, the engines' main line running 51.Kd4 Kb5 52.Bd6 Kc6 53.Bf8 Kb5 54.h4 f4! 55.h5 f3 56.Ke3 Kc4 57.Kxf3 Kb3 58.Bg7 a3 59.Kf4 a2 60.Kg5 Kc2 61.Kh6 Kb1 62.Kxh7 a4 63.h6 a3 64.Kg8 a1=Q 65.Bxa1 Kxa1 66.h7 Kb1 67.h8=Q a2 etc.
47.c6+ Kc7 48.Kc5 Ne5 49.d6+ Kc8 50.Bb2!?
A deliberate piece sacrifice, but not the only way to win.
50...Nd3+
50...Nd7+!? 51.Kd5! Nb8 52.d7+!? Nxd7 53.cxd7+ Kxd7 54.Ke4 is a simple win for White.
51.Kb6 Nxb2 52.d7+ Kd8 53.Kb7 a3 54.c7+ Kxd7 55.c8=Q+ Kd6 56.Qf8+ Kd5 57.Qxa3
The game finished:
57...Nc4 58.Qf3+ Ke5 59.Kc6 Ne3 60.Kb5 Nf5 61.Kxa5 Nd4 62.Qh5+ Ke4 63.Qxh7+ Ke3 64.Qe7+ Kd3 65.Qe1 f3 66.h4 Ne2 67.h5 Ke3 68.h6 f2 69.Qxf2+ Kxf2 70.h7 1-0
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