![]() Here, the defending king tries to leave the edge of the board. Bd7 (now the defending king is confined to the right corner, and checkmate can be given) 15. ![]() ![]() Kb6 (now the king is in the correct position, a knight's move away from the right corner) 13. Nc5 (continuing the knight's manoeuvre) 10. Now there are two possible defenses:īlack clings to the "safe" corner, but loses more quickly.ĥ. The key to the standard winning method is the Nf7–e5–d7–c5–b7 movement of the knight as first demonstrated by Philidor in L'Analyse des Échecs (1777), forming a "W" shape. The white bishop is positioned so that the next two moves, gaining control of g8, are possible.Ī waiting move, forcing Black's king to move so White can play 3.Bh7, taking away g8 from the king. White to move begins executing the W manoeuvreįirst White forces the king to leave the corner. The following method to push the king to the "right" corner is commonly given: The position on the right is one that typically arises after the first phase has been completed and the defender has headed to a corner opposite in color to that occupied by the bishop. Now White can force the king to the a8 corner (the "right" corner for checkmate) by one of the methods below, or by similar techniques. Keeping the black king out of the h8 corner. Ne5! Centralizing the knight and preparing to force the black king out of the h8 corner. Kd5 The black king now must decide where to go, so he goes to the h8 corner, where checkmate cannot be forced. Kf6 The black king is too close to the h8 corner. Be4 White has a wall and will push the king into a corner, see diagram M. Here is an example of how the first phase can be accomplished from the position L.ġ. As noted above, White achieves mate more quickly by preventing the black king from reaching the longest diagonal of the color opposite to that of the bishop. In the first phase, White uses their pieces to force the black king to the edge of the board. These are the majority, in which the general method beginning with Phase 1 as described below can be applied.Ĭheckmate is usually quicker from the third type of position than the fourth type, so White should usually aim for the former and Black the latter. Positions in which the black king can reach the longest diagonal of the color opposite to that of the bishop, such as positions L–N.In such positions White can force mate using Delétang's triangle method, described below. Positions in which White can prevent the black king reaching the longest diagonal of the color opposite to that of the bishop, such as positions O–S.Positions in which White can force mate on a square adjacent to the "wrong" corner, such as position K after 1.Kh8.These form a significant minority, in almost all of which Black to play can immediately take a piece or irrecoverably fork the pieces or White to play has their pieces irrecoverably forked. Positions which are stalemate, or in which White cannot prevent stalemate or the loss of one of their pieces, such as in the positions I and J (below). ![]() Positions in this endgame fall into four categories:
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