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The opposite-colored bishops endgame is a chess endgame in which each side has a single bishop, but the bishops reside on opposite-colored squares on the chessboard, thus cannot attack or block each other. Without other pieces (but with pawns) these endings are notorious for their tendency to result in a draw. These are the most difficult endings in which to convert a small material advantage to a win. With additional pieces, the stronger side has more chances to win, but not as many as if the bishops were on the same color. Many players in a poor position have saved themselves from a loss by trading down to such an endgame. They are often drawn even when one side has an advantage of two or even three pawns, since the weaker side can create a blockade on the squares on which his bishop operates. ==General principles== Edmar Mednis gives two principles for endgames with bishops on opposite colors: # If a player is down material he should look for drawing chances in an endgame with only the bishops and pawns. # With major pieces (queen or rook) on the board, having bishops on opposite colors favors the side with an attack . Ian Rogers gives three principles when there are only the bishops and pawns: # Two connected pawns are not sufficient to win unless they reach their sixth rank # If the attacker has two widely-separated passed pawns that cannot be controlled by the opposing bishop on a single diagonal, they usually win # When the attacker has an outside passed pawn, it should be stopped by the bishop only when the king can block the opposing king . 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Opposite-colored bishops endgame」の詳細全文を読む スポンサード リンク
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