Cordingley puzzle 16

White to play and win

Solution

I think this is straightforward, or at least fairly so. The only calculation needed is to check that after the double rook sacrifice (1Rh7+, 2 Rf7+) and the captures by the queen on g6 and f7, that black can't avoid mate. The fact that the Qd7 is LPDO (as might be seen from my previous blogs, this is one of my favourite chess terms) means that the Be7 is pinned, so the only move to avoid Qh7 mate is Nf8, when e6+ wins the house.

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