[Event "corr., 1964"] [White "Hans-Jochen Schiffer"] [Black "MA Jorde"] [FEN "r2Bk2r/pb1n1pQ1/3np3/1p2P3/2p3K1/3p4/PP1b1PPP/R4B1R b - - 0 1"] %Hidden=1 1... f5+ 2. Kg3 Ne4+ 3. Kf3 Nef6+ 4. Kg3 f4#