28 ... ? Black to draw Lilienthal vs Tolush, 1947  (E72) King's Indian, 43 moves, 1/2-1/2 Karpov vs E Gik, 1968  (B77) Sicilian, Dragon, Yugoslav Attack, 36 moves, 1-0 28: white to move R Beyen vs Filip, 1971  (E20) Nimzo-Indian, 31 moves, 1-0 29 ... : black to move Blackburne vs Mackenzie, 1882  (C45) Scotch Game, 32 moves, 0-1 42. Black to move and draw Portisch vs Kasparov, 1981  (A70) Benoni, Classical with 7.Nf3, 49 moves, 1/2-1/2 9. White to move and mate W N Potter vs F Matthews, 1868  (C21) Center Game, 13 moves, 1-0 18. White to move and win S Kuemin vs R Staechelin, 2005  (D30) Queen's Gambit Declined, 20 moves, 1-0 32. White to move and win Vladimirov vs A V Kharitonov, 1977  (A06) Reti Opening, 33 moves, 1-0 White to move at 64 Tiviakov vs V Arbakov, 1989  (B67) Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 8...Bd7, 64 moves, 1-0 14 white to move N Krogius vs O Chernikov, 1970  (C43) Petrov, Modern Attack, 31 moves, 1-0 33 ... Black to play C Lutz vs Kramnik, 1995  (B33) Sicilian, 35 moves, 0-1 31 ... ? (black to play) A Kosten vs Chandler, 1991  (B33) Sicilian, 35 moves, 0-1 12 games