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[FEN 2k2N2/K4N2/1P2n3/8/2P3R1/7B/8/8 w - - 0 1]

White to mate in two

Solution

[Index of Chessprints]

Solution
 

Today's position is from FIDE Master of Chess Composition Peter Wong's article What is a Chess Problem? Problem 2 is an example.  Its key 1.c5! doesn’t threaten an immediate mate, but all moves by the black knight commit some kind of error that allows a mating reply.  The variations 1…Nd4 2.Rxd4, 1…Nf4 2.Rxf4, 1...Ng5 2.Rxg5, and 1…Ng7 2.Nxg7 are similar – White discovers check and captures the knight to stop it from interfering with the bishop mate.  1...Nxc5 2.Rc4 and 1…Nxf8 2.Rg8 see the white rook pinning the knight, to prevent its return to e6.  In the remaining two lines, 1…Nc7 2.b7 and 1…Nd8 2.Nd6, the errors committed by the knight are called self-blocks: a black piece obstructs a square next to the black king, freeing a white piece that was guarding it to give mate.

2. William Shinkman The Power of the Pieces 1976 Mate in 2

Index of Chessprints

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