In chess, a smothered mate is a checkmate delivered by a knight in which the mated king is unable to move because he is surrounded (or smothered) by his own pieces.The mate is usually seen in a corner of the board, since fewer pieces are needed to surround the king there. For a smothered mate of this sort to occur in a game, it is usually necessary to sacrifice material to compel pieces to smother the king. One method is particularly common and involves: check with the knight, then move the knight away to deliver a double check from the queen and knight, then sacrifice the queen to force the rook next to the king, then mate with the knight! In this video you can see an above mentioned mating idea, but everything is not so easy and there are some underwater stones which should be taken into consideration!
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Alois Johandl,
Deutsche Schachblätter, 1966
Mate in 5
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This position in Forsyth-Edwards Notation (FEN) is: k4r2/rp3b2/pp2N3/2pp4/1b3Q2/2p5/K7/8 w – – 0 0
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