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It’s Your Move: daily chess puzzle # 31

June 26, 2015

White to play and win

 

Dückstein v Pachman, Varna Olympiad 1962

 

Solution

 

I couldn't quite get this puzzle, which, really means, I couldn't get it. I found the winning move, but not the subsequent key rook lift.

So, 1 Ba4!!

The Rb8 is LPDO, and the threat of a jump biff (a jump check) Rb1*Rb8 means that 1…Na4? loses simply, so Black must play 1…Qa4[], met by 2 Qe6+.

If Black's king goes to f8, then 3 Rf6+ breaks through, and it is more less clear that the Q and remaining rook will mate, partly because at some stage there will be a Q check forking the K and LPDO Rb8, and also that a king move to the seventh rook will let the R move upwards.

I will leave it to my readers to either compute every line, or 'see enough', or see that white must have at least a perpetual.

What I couldn't break was 2…Kd8. The best I could find was 3 Rfd1+ (?) Qd1+ 4 Rd1[] Nd1[] 5 Qd6+ Kc8[] and white either has to settle with a perpetual, which I would take, or play 6 Qd1 with the forlorn hope that somehow the Q can defeat the two rooks.

I suspect the objective evaluation is equal, but I would take black, on the basis that if white were to mess up, and Black get organised, his two rooks could mop up.
However, White has considerably better. 3 Qd6+ Kc8 [] 4 Rf5! and it is game over.
 

I would like to think that I would play 1 Ba4, with the intention of going into the perpetual or 6. Qd1 line, but then, when 2…Kd8 is played, think, and see 4 Rf5!. I would like to think that.

 

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