language
The dramatic finishing move in chess actually began life in Persian, describing not a game piece but the fate of a ruler.
'The king is helpless/defeated' is correct — the phrase traces back to the Persian 'shah mat,' describing a ruler with no way to escape or fight back, which perfectly captured the moment a chess king could no longer avoid capture.
'The game is finished' and 'victory is claimed' are reasonable guesses at what checkmate might mean in modern English usage, but they aren't the literal translation of the original Persian phrase, which specifically describes the king's own helpless fate rather than the state of the game overall.
The phrase traveled a long linguistic road — from Persian into Arabic, then into Old French, and finally into English — picking up small changes in pronunciation and spelling at each stop before becoming the 'checkmate' players say today.
language
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