Tuesday 9 June 2020

Fundamentals (part 42)

Spanton (1936) - Aaron Viudes Serra (1791)
Benidorm U2000 2015
White has just captured on e3 - who stands better?
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Black is winning because he has a passed pawn while White has two queenside pawns held up by one black queenside pawn.
61...e4 62.b4!?
Without counterplay, White must succumb, eg 62.Ke2 g5 63.hxg5 Kxg5 64.Ke3 Kf5! (but 64...Kg4 65.b4! cxb4 66.Kxe4 is a draw, according to Stockfish11 and Komodo11.01) 65.Ke2 Ke6 66.Kd2 Kf6 67.Ke2 Kf5 68.Kf2 (if 68.Ke3 then 68...Ke5) Kg4, and here 65.b4 does not work, viz 65...cxb4 66.c5 Kf5 etc.
The text does not save White either, but Black has chances to go wrong.
62...cxb4 63.c5 Ke6
This wins, but simpler is 63...b3 64.c6 Ke6.
64.Kxe4 b3 65.Kd3
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65...b2?
This loses a tempo. Winning is 65...Kd5 66.Kc3 Kxc5 67.Kxb3 Kd4.
66.Kc2 Kd5 67.Kxb2 Kxc5 68.Kc3 Kd5 69.Kd3 Ke5 70.Ke3
Black offered a draw.
70...Kf5 71.Kf3 g5 72.hxg5 Kxg5 73.Kg2 ½–½

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