Mate in 3

1.Bg7 threatens 2.Sh6 followed by 3.Sxf7. Black can only defend by clearing the seventh rank for the rook to guard f7. In each case the defence contains two weaknesses, abandoning a pawn guard or potential guard of a threat square, while closing a rank to prevent a rook guard. 1...b6 2.Se7 and 3.Sc6; 1...b5 2.Rc2 and 3.Rc5; 1...c6 2.Bf8 and 3.Bd6; 1...c5 2.Re8 and 3.Rd5.

Dafydd Johnston: Nice correspondence between the four thematic lines as each white piece in turn takes advantage of the double weakness of the four black pawn moves.

Guy Meissonnier: A splendid three-mover!