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The two bishops checkmate is the checkmate of a lone king by the opponent's two bishops and king. [b] 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.
In contrast to a king and two bishops (on opposite-colored squares), or a bishop and a knight, a king and two knights cannot force checkmate against a lone king (however, the superior side can force stalemate [1] [2]). Although there are checkmate positions, a king and two knights cannot force them against proper, relatively easy defense. [3]
In the first diagram with White to play, White can force checkmate as follows: 1. Rxg7+ Kh8 2. Rxh7+ Kg8 3. Rbg7# For this type of mate, the rooks on White's 7th rank can start on any two files from a to e, and although black pawns are commonly present as shown, they are not necessary to deliver the mate. The second diagram shows the final ...
With the stronger side to move, checkmate can be forced in at most thirty-three moves from almost any starting position. [1] [2] Although this is classified as one of the four basic checkmates [3] [a], it occurs in practice only approximately once in every 6,000 games. [4]
2. Kc7. followed by 3. d8=Q. Otherwise, if the black king stays on one of those two squares, he keeps the white king from occupying a key square. [17] Rule 2: White wins if at least any two of the following conditions are met: (a) the white king is in front of the pawn (b) white has the opposition (c) the white king is on the sixth rank. [18]
Philidor's mate, also known as Philidor's legacy, is a checkmating pattern that ends in smothered mate. This method involves checking with the knight forcing the king out of the corner of the board, moving the knight away to deliver a double check from the queen and knight, sacrificing the queen to force the rook next to the king, and mating with the knight.
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A move of the king could expose the opposing king to a discovered check (and, rarely, checkmate) by another piece, however. In fast chess , depending on the rules in effect, placing or leaving one's king in check may result in immediate loss of the game.