Rating 726 · Beginner · mate, mate in 1, one move, opening, opera mate.
White: king f1; queen f3; rooks a1/h1; bishops b2/e4; knight b1; pawns a2/b3/f2/g2/h4. Black: king g8; queen c6; rooks a8/e8; bishops a5/c8; knights b8/g6; pawns a7/b7/c7/f7/g7/h6. Black is ahead by 4 points of material. Black to move.
mate, mate in 1, one move, opening, opera mate. The combination ends with Re1# delivering checkmate.
FEN: rnb1r1k1/ppp2pp1/2q3np/b7/4B2P/1P3Q2/PB3PP1/RN3K1R w - - 1 21
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