Wednesday 24 March 2021

Knight v Bishop (part 69)

Black has just captured on e4 in Spanton (170) - Russell Goodfellow (147), Doncaster U171 2020. Who stands better, and by how much?
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White has the better minor-piece for dealing with rival pawn-majorities, but Black has the more-active king. The analysis engines Stockfish12 and Komodo12.1.1 reckon the position is dead-equal.
46.Bg7 Kd5 47.Ke2 Ng3+ 48.Kf3 Nf5 49.Bf6 Ke6 50.Bg5 d5 51.g4 Nd6+ 52.Bc1 d4 53.h5 Kf6 54.g5 Kf5 55.g6 Ne8 56.Bh6 Nf6 57.g7 e4+ 58.Kg3?!
This move loses a pawn, but, according to the engines, the position remains completely equal.
58...Nxh5+ 59.Kf2 Nf6!?
RG had been playing with the 10-second increment for about 20 moves. Here he could have effectively forced a draw with 59...Nxg7, but played on for more. The text leaves White with just two moves that maintain the draw, according to the Syzygy tablebase.
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60.Bc1
60.Bd2 also draws, but all king moves lose, eg 60.Ke1? Kg6 etc.
60...Ng8
If 60...Kg6, then 61.Bb2 and 61.Kg3 draw.
61.Bb2 Ke5 1-0 (Time)

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