Retrograde Analysis
Chess Problems

by Leo Mano


AR01 - Leo Mano
(11x16) nb6 - Rpp1P1n1 - brp3p1 - Pk6 - 1P4p1 - 1KPP1p2 - 1Npp1PP1 - qrB5

Mate in 1. Who?

Solution: 1 ... Qa4++!

It is the Black's move (1 c4++? is illegal) becose the only way to reach this position is showed retracting 15 e6-e7!, Nf5-g7; 14 e5-e6, Ne3-f5; 13 e4-e5, Nd1-e3; 12 Nc4-b2, Nb2-d1; 11 Ne5-c4! (the key move! - allowed by the free e5 square), f4-f3; 10 Nf7-e5, f5-f4; 9 Nh8-f7, f6-f5; 8 h7-h8=N, f7-f6; 7 h6-h7, h7xBg6; 6 Bh5-g6, g5-g4; 5 Be2-h5, g6-g5; 4 Bf1-e2, g7-g6; 3 e2-e4, e3xNd2; 2 Nf3-d2, e4-e3; 1 Bg5-c1, Re1-b1; etc.

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(p)1999-2008 by Leo Mano. Rio de Janeiro - RJ, Brazil.