Editing Checkmate (section)

===Unusual mates===
There are also positions in which a king and a knight can checkmate a king and a bishop, knight, or rook; or a king and a bishop can checkmate a king with a bishop on the other color of squares or with a knight, but the checkmate cannot be forced if there is no other material on the board (see the diagrams for some examples).<ref name=pand09p63>{{harvnb|Pandolfini|2009|p=63}}</ref> Nevertheless, it keeps these {{chessgloss|material}} combinations from being ruled a [[draw (chess)|draw]] because of "insufficient mating material" or "impossibility of checkmate" under the [[FIDE]] [[rules of chess]]. The [[U.S. Chess Federation]] rules are different. In a typical position with a {{chessgloss|minor piece}} versus a minor piece, a player would be able to claim a draw if they have a limited amount of time left.<ref>{{harvnb|Just|Burg|2003|pp=49, 291}}</ref>
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|Pandolfini
|  |  |  |  |  |  |bd|kd
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|Checkmate, but cannot be forced
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|  |  |  |  |  |  |  |kd
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|Checkmate, but cannot be forced
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|fen=8/8/8/8/8/KN6/8/kb6
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|footer= Checkmate, but cannot be forced
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|kl|nl|  |  |  |  |  |  
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|kd|bd|  |  |  |  |  |  
|Checkmate, but cannot be forced
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{{chess diagram-fen
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|  |  |  |  |  |  |nl|  
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|Checkmate, but cannot be forced
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|fen=8/8/8/8/8/1N6/r7/k1K5
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|kd|  |kl|  |  |  |  |  
|Checkmate, but cannot be forced
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| =
|  |  |  |  |  |  |  |kd
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|Checkmate, but cannot be forced
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