Test your chess: Reitstein problem 143

White to play and win

RF Griffiths v G Bouelle 1968

Solution

I saw the solution intuitively, 1 Rg6! whose main purpose is to give the white queen a checking square on the e file; after 1…fg[] 2 Qe4+ black can only choose how to lose:

2…Kd8 3 Qe7+ Kc8[] 4 d7+ and the LPDO Qc5 falls;

2…Kd7 3 Qe7+ Kc6 (3…Kc8 as above) 4 Qc7 mate;

2…Qe5 3 Qc6+ Kd8[] 4 Qc7+ Ke8[] 5 Qc8 mate.

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