Introduction Back-rank checkmate

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back-rank mates guarded against friendly rook or queen protecting rank. however, may possible attacking side deflect 1 of these pieces away defensive duties. in example shown left, white can play 1.qxc6 , black cannot reply 1...rxc6 because of 2.rd8+ rxd8 3.rxd8# back-rank mate. black therefore loses bishop no compensation—and black has no continuation because of threat of qxa8 or qxc8, example, 1...qa6 2.qxa8! rxa8 3.rd8+ rxd8 4.rxd8#. if black tries defend rank white s queen , bishop skewered, white can keep piece, example 1...b5 (defending d8 queen) 2.qf3! keeping rook on c8 stuck defense of rook on a8, or 1...g6 (creating luft) 2.qf6! , black still cannot take due back-rank mate.


back-rank threats can guarded against more permanently moving 1 of pawns in front of king give king flight square (or luft). if black play in example left, counter white s threat with, example, 1...g6, giving king square on g7 can safely move. note, however, 1...h6 in example not job, after d3-rook moves, h7-square covered white bishop.


it not idea play such pawn moves unless there pressing need so, can not represent loss of time, may allow enemy penetration around squares weakened pawn advance. in many chess openings, however, played other purpose, before back-rank threat has emerged (...h6 played put question white bishop on g5, example; see fianchetto).







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