FOREST CHESS (#6)
Black can deliver checkmate in one move.
Players must make a right move on the chess board and use its algebraic notation as a password in the Certitude checker - then they'll get coordinates of the cache.
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Use English version of Algebraic chess notation to write the move:
https://en.wikipedia.org/wiki/Algebraic_notation_(chess)
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You can validate your puzzle solution with certitude.
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