Vukovic mate (1 move)
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This checkmate pattern is named after Vladimir Vuković, who discussed this in his book "The Art of Attack in Chess".
White can deliver Vuković's mate with Re7#. The rook is protected by the pawn on d6.
Black can give Vuković's mate with Rg2#. The rook is protected by the bishop on h3.
This does happen usually in endgames with an unprotected king.