Monday, 18 January 2021

Knight v Bishop (part four)

Black has just captured on d7 in Spanton (147) - D Healey (-), Highbury (London) Rapid 1990. Who stands better, and by how much?
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Once again my main analysis engines disagree in their precise assessment of a Spanish Exchange ending, but less so than on previous occasions in this series. Stockfish12 has White winning; Komodo11.01 gives White the upper hand (+1.22).
20.Nd4 Ke7 21.Kd2 c5 22.Ne2 Kd6!?
This comes to be Stockfish12's choice, at least for a while, but eliminating Black's doubled pawns with 22...f5 is a natural alternative. However Black then still has the problem of being unable to create a passed pawn on the queenside, while White gradually advances on the kingside.
23.Ke3
Komodo11.01 prefers 23.g4!?, which rules out ...f5, but I am wary of putting pawns on light squares in this type of ending.
23...f5 24.Ng3 fxe4
The engines prefer 24...Ke5?! but Black has few drawing chances in the pawn-ending that arises after 25.Nxf5 Bxf5 etc.
25.Kxe4 Bc6+ 26.Kf5 Ke7
Attempting counterplay with 26...Kd5!? is objectively worse, according to the engines, but at least gives White something to think about.
27.Ne4 Bd5 28.a3 c4 29.Nf6 Be6+ 30.Ke5 b5
Black can save the h6 pawn, but not the game, with 30...Kf8. However 31.Nd5 wins a queenside pawn by one means or another.
31.Ng8+ Kd7 32.Nxh6 (1-0, 51 moves)

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