User:Qwertyxp2000/Two bishops checkmate
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The two bishops checkmate in chess is the checkmate of a lone king by the opponent's two bishops and king.[lower-alpha 1] The superior side is able to drive the lone king into a corner and force mate using the two bishops and king collaboratively. The only stipulation is that the two bishops must move on opposite-colored squares.[lower-alpha 2][2] Accomplishing the mate requires a maximum of 18 moves.
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Three basic checkmate positions are possible:[3]
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This article uses algebraic notation to describe chess moves.