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Perpetual check. Explanation of perpetual check with an animated diagram.[All Comments] [Add Comment or Rating]NeuroDoc is correct - perpetual check is 'chess slang', commonly used for a forced sequence of moves. Note for computer programmers: any time a position repeats five times in a game, it must be true that the same position with the same player to move has repeated at least three times. Just mentioned this in case a plain 'fivefold repetition rule' is easier to code.
<p>In my database is the game [R. Pert - M. Franklin, 1996] in which both players have two rooks on the board. Black sets up a possible stalemate position on move 33 by advancing his passed Pawn to h3. All White needs to do is sacrifice both Rooks. After 21 consecutive Rook checks, they agreed to a draw. Of course, Black can always end the checks (and stalemate White) by capturing the last Rook.