[Event "Kiev, 1965"] [White "viktor Korchnoi"] [Black "Andrei Peterson"] [FEN "r2r1n2/pp2bk2/2p1p2p/3q4/3PN1QP/2P3R1/P4PP1/5RK1 w - - 1 0"] %Hidden=1 1. Qg7+ Ke8 2. Qxe7+ Kxe7 3. Rg7+ Ke8 4. Nf6#