Bradford U171 2018
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| White to make his 38th move - what should the result be? |
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38.d5+
White had to find 38.Kf3!, the idea being to meet 38...Kd5 with 39.Ke3, when 39...c3 40.Kd3 c2 41.Kxc2 Kxd4 42.Kd2 is drawn thanks to White having the opposition. Black could try 41...Kc4!? but White draws with 42.Kd1 (or 42.Kc1) Kxd4 43.Kd2. The analysis engines Komodo11.01 and Stockfish11 show that, after 41...Kc4!?, even 42.d5!? draws, eg 42...cxd5 43.Kd2 d4 44.Kc2 d3+ 45.Kd2 c6 46.Kc1, when Black cannot play 46...Kc3? as it loses to 47.b5 etc.
Note that 38.Ke3 loses to 38...Kd5 as the d pawn falls, and 38.b5 cxb5 39.d5+ loses wherever the black king moves to, eg 39...Ke7 40.Kd4 Kf6 41.Ke4 b4! 42.axb4 a3.
The game finished:
38...cxd5+ 39.Kd4 c6 (an only-move but an obvious one) 40.Kc3 Ke5 41.Kd2 Kd4 42.Kc1 c3 43.Kc2 Kc4 44.Kc1 d4 45.Kc2 d3+ 46.Kd1 Kb3 47.b5 Kb2 48.bxc6 c2+ 49.Kd2 c1=Q+ 0-1
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