Source: by Karl Fabel & was reprinted in Martin Gardner's New Mathematical Diversions from Scientific American (pub. Simon & Schuster), ch.19, p.223
Another commonly seen solution to this sort of problem:
White can legally resign.
I suspect the trick is, as with so many chess puzzles, that:
we are looking at the board the wrong way.
In this case, there are several possible moves:
Actually, I think there's no move that can force mate, if this is the case, because now the pawns are 'blocking' the wrong squares.
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protected by Beastly Gerbil May 27 '17 at 11:52
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