[Event "Belgrade"] [Site "?"] [Round "0"] [White "Gligoric"] [Black "Petrosian"] [Result "1-0"] [FEN "5rk1/2nnr2q/p2p1p1p/2pP1Rp1/2P1P1Q1/1P1N4/4B1PP/5RK1 w - - 0 1"] [ECO "A00"] [Opening "Polish (Sokolsky; Orang-Utan)"] 1. b4 {By means of this breakthrough White unhinges Black's Queenside and as a result is able to undertake decisive operations on the f-file} 1... cxb4 2. c5 $1 h5 $1 (2... dxc5 3. d6 {fork tactic}) 3. Qg3 $1 (3. Qf3 Nb5) (3. Qxh5 Qxh5 4. Bxh5 Rxe4 $15) 3... Rxe4 4. c6 $1 { Driving away Nd7, the greatest obstacle to White's ambition on the f-file} 4... Rxe2 5. Qxd6 Nb5 (5... Qe7 6. Qxe7 Rxe7 7. Nxb4 Nb5 8. cxd7 Rxd7) 6. Qxb4 Nb8 ( 6... Qe7) 7. Rxg5+ {Xrayed} 7... Kf7 (7... fxg5 8. Qxf8#) 8. Rxf6+ $1 { destruction down the f-file} 8... Kxf6 9. Qxf8+ Kxg5 10. h4+ 1-0