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A method for checkmate applicable when the lone king is in the corner of the opposite color from the bishop (the "wrong" corner, where checkmate cannot be forced), was given by François-André Danican Philidor in the 1777 update [5] to his famous 1749 treatise, L'Analyse des Échecs. [6]
The bishop and knight mate is one of the four basic checkmates and occurs when the king works together with a bishop and knight to force the opponent king to the corner of the board. The bishop and knight endgame can be difficult to master: some positions may require up to 34 moves of perfect play before checkmate can be delivered.
king's field The set of squares—horizontal, vertical and diagonal—adjacent to the square occupied by a king. [4] The squares to which the king might ordinarily move, unless attacked by enemy pieces. Inspection of the field is important in both problems and real gameplay to evaluate threats, and to confirm checkmate.
In a chess game, each player begins with sixteen pieces: one king, one queen, two rooks, two knights, two bishops, and eight pawns. The object of the game is to checkmate the opponent's king, whereby the king is under immediate attack (in "check") and there is no way to remove or defend it from attack, or force the opposing player to forfeit.
The king is more valuable than all of the other pieces combined, since its checkmate loses the game, but is still capable as a fighting piece; in the endgame, the king is generally more powerful than a bishop or knight but less powerful than a rook. [19]
Boden's Mate is a checkmating pattern in chess characterized by bishops on two criss-crossing diagonals (for example, bishops on a6 and f4 delivering mate to a king on c8), with possible flight squares for the king being occupied by friendly pieces or under attack by enemy
) without succumbing to a checkmate in two moves, 5...Nxe5 would win the white knight (for the pawn) and protect the bishop on g4. Instead, with 5.h3, White "puts the question" to the bishop which must either retreat on the c8–h3 diagonal, capture the knight, be captured, or as in this game, move to an insecure square.
king + two bishops cannot checkmate a lone king, except for some very rare positions (0.17%); king + knight + bishop cannot checkmate a lone king, except for some very rare positions (0.5%); king + queen does not beat king + rook: 4.3% of the positions are perpetual check draws, and 37.2% are fortress draws; king + rook can checkmate a lone king.