Futility Closet

 http://www.futilitycloset.com/2008/03/23/king-queen-knave/

King, Queen, Knave

Posted in Literature, Puzzles by Greg Ross on March 23rd, 2008
 

nabokov chess problem

 

Vladimir Nabokov composed chess problems. Here's a clever one from 1932: "White retracts its last move and mates in one."
 
This is an instance of retrograde analysis: Of the many legal moves that White might just have made, only one can be revised to yield an immediate mate. Can you find it?
 
 

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