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Theory commonly refers to the erudite study and the philosophy behind the moves in chess (like the opening or endgame theory), but this tag can also be used for questions about the theoretic study of the game itself.

6 votes
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2k views

What is the longest possible forced checkmate sequence?

As title says. My question is about legal positions (positions which could be reached in actual games), but if there is a known solution with an illegal position to start the sequence, I'd be interest …
Mauro Giliberti's user avatar