Puzzle of the Day

White to move and mate in 1. The oldest trick in the book, and it still wins games at every level, every day.

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Rd8#. The back rank mate. Black's own pawns are the prison bars. If your opponent's king is on its starting rank behind unmoved pawns and you have a rook with an open file, that file is a loaded weapon.

Think you can pull that off with the clock ticking? In ShatterChess, back-rank victims don't just fall over. They shatter.
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