[Event "corr., 1977"] [White "E Stoddard"] [Black "S Sorenson"] [FEN "5rk1/ppp3pp/8/3pQ3/3P2b1/5rPq/PP1P1P2/R1BB1RK1 b - - 0 1"] %Hidden=1 1... Qxf1+ 2. Kxf1 Rxf2+ 3. Kg1 Rf1+ 4. Kg2 R8f2#