r1 G Grigorov vs K Prasanna, 2004 (E32) Nimzo-Indian, Classical, 31 moves, 1/2-1/2 r2 Sengupta vs T L Petrosian, 2004  (C46) Three Knights, 29 moves, 0-1 r3 L D'Costa vs F Mandizha, 2004 (B03) Alekhine's Defense, 45 moves, 1-0 r1 P Jaiswal vs Zhao Jun, 2004 (A46) Queen's Pawn Game, 73 moves, 0-1 r5 L D'Costa vs S Dasari, 2004 (D91) Grunfeld, 5.Bg5, 33 moves, 1-0 r6 T L Petrosian vs Y Drozdovskij, 2004  (A07) King's Indian Attack, 35 moves, 1-0 r7 L D'Costa vs L Perdomo, 2004 (E75) King's Indian, Averbakh, Main line, 37 moves, 0-1 r1 L D'Costa vs Y Sandeep, 2004 (D85) Grunfeld, 39 moves, 1-0 r9 L D'Costa vs G N Gopal, 2004 (D85) Grunfeld, 45 moves, 1-0 r12 L D'Costa vs A Das, 2004 (E12) Queen's Indian, 15 moves, 1/2-1/2 r11 L D'Costa vs C Vaidya, 2004 (C05) French, Tarrasch, 38 moves, 1/2-1/2 r2 K Prasanna vs V Jianu, 2004 (B22) Sicilian, Alapin, 32 moves, 0-1 12 games