[Event "Herceg Novi Blitz, 1970"] [White "Korchnoi, Viktor"] [Black "Fischer, Bobby"] [Result "0-1"] [ECO "E73"] [Opening "King's Indian: 5.Be2 O-O"] 1.d4 {Notes by Bobby Fischer} Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Nf3 e5 7.O-O Nc6 8.d5 Ne7 9.Nd2 {This move is apparently considered best by the Russians. In the "Turner Mira" 1970, Petrosian played 9 b4 Nh5 10 Nd2!? Nf4 11 a4, but without great success against Gligoric.} c5 {I think this is a logical move. Black takes a tempo from his King side play to slow down White's Queen side initiative which usually comes quite quickly with b4, c5, etc.} 10.a3 Ne8 11.b4 b6 12.Rb1 f5 {! Having made all the necessary precautions on the Queen's side Black is now ready to attack on the King's flank.} 13.f3 {Maybe better is 13 Nb3 as in the game Gligoric-Tringov, Belgrade, 1969.} f4 14.a4 g5 15.a5 Rf6 {!} 16.bxc5 {? This is, as Korchnoi pointed out afterwards, a "terrible mistake" because now it is impossible for White to get any initiative on the Queen side.} bxc5 17.Nb3 Rg6 18.Bd2 Nf6 {or ...h5!} 19.Kh1 g4 {Maybe more exact was 19...h5} 20.fxg4 {Forced because of the threat of 20...g3 and then white cannot play 21 h3 because of 21...Bxh3 etc.} Nxg4 21.Rf3 {? 21 Bf3! was better, with a more tenacious defence..} Rh6 22.h3 Ng6 23.Kg1 Nf6 24.Be1 Nh8 {!! This attacking manouver is decisive.} 25.Rd3 Nf7 26.Bf3 {h4!? held out a little longer.} Ng5 27.Qe2 Rg6 28.Kf1 {Or 28 Kh2 Qd7 threatens 29...Nxh3 etc.} Nxh3 29.gxh3 Bxh3+ 30.Kf2 {At this moment my hand hovered over White's Pawn on e4, but at the last second I realized that 30...Nxe4 is answered by 31 Qxe4 and White wins.} Ng4+ 31.Bxg4 Bxg4 {And here Korchnoi thought for about a minute and a half and not seeing a defence to the double threat of 31...Bxe2 and 32...Qh4+ resigned.} 0-1