Clue #1 So vs R Praggnanandhaa, 2018  (A45) Queen's Pawn Game, 64 moves, 0-1 Clue #2 Grischuk vs Aronian, 2010  (D39) Queen's Gambit Declined, Ragozin, Vienna Variation, 101 moves, 1/2-1/2 Clue #3 Fruit vs Ant, 2006  (E19) Queen's Indian, Old Main line, 9.Qxc3, 45 moves, 1-0 Clue #4 I Sokolov vs J Fluvia Poyatos, 2012  (E48) Nimzo-Indian, 4.e3 O-O 5.Bd3 d5, 45 moves, 0-1 Clue #5 Bill Gates vs Carlsen, 2014  (B00) Uncommon King's Pawn Opening, 9 moves, 0-1 Clue #6 Woei Haw Tseng vs V T Nguyen, 2008 (B52) Sicilian, Canal-Sokolsky (Rossolimo) Attack, 33 moves, 1/2-1/2 Clue #7 F Ashiku vs S L Narayanan, 2013  (B22) Sicilian, Alapin, 31 moves, 1/2-1/2 Clue #8 J S Rubin vs E Winter, 1974  (A06) Reti Opening, 14 moves, 0-1 Clue #9 Dubov vs Duda, 2015 (D16) Queen's Gambit Declined Slav, 34 moves, 1/2-1/2 Clue #10 Navara vs A Dergatschova, 2007  (D07) Queen's Gambit Declined, Chigorin Defense, 36 moves, 1-0 Clue #11 J Zegada vs A Prameshuber, 1964  (C44) King's Pawn Game, 80 moves, 0-1 Clue #12 J F Cubas vs O Zambrana, 2002  (A00) Uncommon Opening, 3 moves, 1/2-1/2 Clue #13 E Steiner vs Capablanca, 1929  (C71) Ruy Lopez, 32 moves, 0-1 Clue #14 Short vs J Vakhidov, 2014  (A45) Queen's Pawn Game, 39 moves, 1-0 Clue #15 Euwe vs Alekhine, 1935  (D21) Queen's Gambit Accepted, 40 moves, 1/2-1/2 Clue #16 P Ostojic vs J Tarjan, 1974  (B77) Sicilian, Dragon, Yugoslav Attack, 23 moves, 1-0 Clue #17 V Kunin vs T K Antal, 2017 (B50) Sicilian, 72 moves, 1-0 Clue #18 B Amin vs Gelfand, 2015 (B30) Sicilian, 26 moves, 1/2-1/2 Clue #19 B Margolin vs V Babula Sr, 2017 (B22) Sicilian, Alapin, 20 moves, 1/2-1/2 Clue #20 G Newnes vs Count de Tamisier, 1890  (C50) Giuoco Piano, 35 moves, 1-0 Clue #21 M Istona vs K Bulski, 2017  (B43) Sicilian, Kan, 5.Nc3, 41 moves, 0-1 Clue #22 C Perena vs A Sharevich, 2008 (D30) Queen's Gambit Declined, 47 moves, 0-1 Clue #23 R Sprague vs G E Hartleb, 1959 (C77) Ruy Lopez, 35 moves, 0-1 Clue #24 U S Arat vs K Megalios, 2015 (A07) King's Indian Attack, 92 moves, 1-0 Clue #25 Bachir Chihani vs N E Ghabache, 2000 (B32) Sicilian, 34 moves, 0-1 Clue #26 N Mnushkin vs V Vepkhvishvili, 1987 (C44) King's Pawn Game, 38 moves, 1-0 Clue #27 L Times vs J Gonzales, 2001  (A46) Queen's Pawn Game, 30 moves, 1-0 Clue #28 J Silman vs V Moskalenko, 1994  (A84) Dutch, 41 moves, 0-1 Clue #29 A Bangiev vs W Mglosiek, 1984 (C36) King's Gambit Accepted, Abbazia Defense, 33 moves, 1-0 Clue #30 A Suhobeck vs O Oberon, 1954  (C59) Two Knights, 36 moves, 1-0 Clue #31 J Pereira Santos vs Taimanov, 1985 (E00) Queen's Pawn Game, 37 moves, 1/2-1/2 Clue #32 A Antinyan vs E Moradiabadi, 2011 (B06) Robatsch, 45 moves, 1/2-1/2 Clue #33 C Landenbergue vs Chiburdanidze, 1990 (A15) English, 8 moves, 1/2-1/2 Clue #34 S Prayitno vs A Margana, 2012 (D34) Queen's Gambit Declined, Tarrasch, 87 moves, 1/2-1/2 Clue #35 G Gallus vs F Jacoby, 1989 (A00) Uncommon Opening, 12 moves, 1-0 Clue #36 V Georgiev vs G Borgo, 2001 (D46) Queen's Gambit Declined Semi-Slav, 37 moves, 1/2-1/2 Clue #37 J Ballent vs Larsen, 2002 (B06) Robatsch, 26 moves, 0-1 Clue #38 D Dzhakaev vs Y Bayram, 2003  (C46) Three Knights, 27 moves, 0-1 Clue #39 H Silbermann vs Vidmar, 1935 (D43) Queen's Gambit Declined Semi-Slav, 53 moves, 0-1 Clue #40 Carlsen vs P Potapov, 2002 (C46) Three Knights, 34 moves, 1/2-1/2 Clue #41 N Georgiadis vs Leko, 2017 (B91) Sicilian, Najdorf, Zagreb (Fianchetto) Variation, 22 moves, 1/2-1/2 Clue #42 A Artidiello vs D Freeman, 2002  (B01) Scandinavian, 45 moves, 1/2-1/2 42 games