Sunday, 17 January 2021

Knight v Bishop (part three)

Black has just captured on e7 in Spanton (147) - Martin Page (156), Paignton Challengers 1990. Who stands better, and by how much?
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Yet another ending from the Exchange Variation of the Spanish. White is winning, according to Stockfish12; has a slight edge, according to Komodo11.01. The former assessment is probably correct. The bishop has no targets on the queenside and there is no realistic possibility of Black creating a passed pawn there. Meanwhile White can steadily advance on the other flank. 
32.Nf2 Kf6 33.Kd2 g5!?
Trying to make it more awkward for White to mobilise his kingside majority.
34.Ke3 Ke5 35.g3 c5 36.h3 Bc8 37.f4+ Kf6 38.fxg5+!?
The engines prefer 38.h4 or 38.e5+.
38...Kxg5!?
MP may have rejected 38...hxg5 because 39.h4 gxh4 40.gxh4 gives White a passed pawn that will divert Black's king from the centre of the board. Black could instead play 39...Kg6, but then the engines give 40.hxg5 Kxg5 41.Kf3, which both reckon is winning for White.
39.h4+ Kf6 40.Kf4 Ke6 41.e5 f5 42.exf6 Kxf6 43.g4 Bb7 44.Ne4+ Kg6 45.Nxc5
Capturing this pawn is irrelevant to the winning process, but does no harm.
The game finished:
45...Bg2 46.Ne6 Bf1?! 47.Nd4 Bd3 48.Nxb5 Kf6 49.Nd6 Be2 50.Nc8 Bd1 51.Nb6 Bb3 52.Ke4 Bd1 53.Kf4 Bb3 54.Nd5+ Kg6 55.g5 hxg5+ 56.hxg5 Bc2 57.Ne3 Bd3 58.Ng4 Be2 59.Ne5+ Kh5 60.g6 Kh6 61.Kf5 Kg7 62.Kg5 Bd3 63.Kf4 Be2 64.Ke3 Bd1 65.Kd4 Bb3 66.Kc5 Kf6 67.Kb4 Kg7 68.Nxc4 1-0

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