No price is too great for the scalp of the enemy King.
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[Event "rated untimed match"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "White player"] [Black "Black player"] [Result "*"] [BlackElo "0"] [FEN "8/8/8/3k4/8/8/8/Q6K w - - 0 1"] [SetUp "1"] [TimeControl "0"] [WhiteElo "0"] { The King and Queen Checkmate.|First, white must drive his opponent's king to the side of the board.|Any of a number of moves will win in this line, but these seem most to the point. } 1. Qc3 { Restricting the black king's move options. } 1... Ke4 { Black will avoid moving to the side of the board for as long as possible. } 2. Kg2 Kd5 3. Kf3 Kd6 4. Ke4 Ke6 5. Qc6+ Ke7 6. Kf5 Kf7 7. Qb7+ Kg8 8. Kf6 Kh8 9. Qg7# *