Tuesday, 22 December 2020

Opposite Exceptions (part 12)

White has just captured on f2 in Spanton (1923) - Jan Divis (1526), Highlands Open (Třebíč, Czechia), 2018. How big is White's advantage?
*****
*****
*****
*****
*****
*****
*****
*****
*****
*****
Stockfish12 and Komodo11.01 reckon White has a slight edge.
33...Kf6?
A horrible oversight, perhaps caused by relaxing after reaching a drawn ending. Even after the text, however, the engines reckon White 'only' has the upper hand (about +1.03) rather than a winning advantage.
34.Bxb7
*****
*****
*****
*****
*****
34...Ke5?
Correct is 34...Bc1 to force b3, after which the position may well be drawn.
The game finished:
35.Be4 h6 36.a4 bxa3 37.bxa3 Kd4 38.a4 Bd8 39.Kf3 Ke5 40.Kg4 Kf6 41.h4 Ba5 42.Kf3 Be1 43.h5 Kg5 44.g4 Bc3 45.Bf5 Kf6 46.Ke4 Ke7 47.Kd5 Be5 48.Kc6 Kd8 49.a5 Bc3 50.a6 d5 51.a7 1-0

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