Caro Kann Defense Endgame Offer Sacrifice Puzzle (Rated 922): Spot Mate — Back Rank
A back rank mate occurs when a king is boxed in by its own pieces or weakened pawn shield, allowing an attacking rook or queen to deliver a decisive check. In this middlegame position, Black exploits White’s exposed back-rank weaknesses and the pressure around the king. The key idea is a forcing mating attack that turns active piece placement into a concrete threat, even though White appears to have extra material and strong attacking pieces.