[Event "Brilon, 1978"] [White "Tigran V. Petrosian"] [Black "Rudi Koepsell"] [FEN "2rn2k1/1q1N1pbp/4pB1P/pp1pPn2/3P4/1Pr2N2/P2Q1P1K/6R1 w - - 1 0"] %Hidden=1 1. Rxg7+ Nxg7 2. Qg5 Qxd7 3. Qxg7#