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- 5.e3 (not 5...b5), D10-D19 1. d4 d5 2. c4 c6 Queen's Gambit Slav defence, D15 - 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 - Slav Defense: Three Knights Variation, D15 - 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 a6 - Slav Defense: Chebanenko Variation, SÉRIE D
Qatar Masters Open 2015 – Round 6.7 – Jakovenko, Dmitry – 1-0 – Bologan, Victor – G223

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- 6.O-O O-O, 7.Re1 d5, E12-E19 1. d4 Nf6 2. c4 e6 3. Nf3 b6 Queen's Indian defence, E17 - 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 - Queen's Indian Defense: Traditional Variation, SÉRIE E
Qatar Masters Open 2015 – Round 6.8 – Nguyen, Ngoc Truong Son – 1/2-1/2 – Vitiugov, Nikita – G224

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- 7.Nbd2 (not 7...Bf5, 7...Nbd7, 7...Ne4), D70-D79 1. d4 Nf6 2. c4 g6 3. f3 d5 Neo-Gruenfeld defence, D78 - 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 c6 6. O-O d5 - Neo-Grünfeld Defense: Classical Variation, Original Defense, SÉRIE D
Qatar Masters Open 2015 – Round 6.9 – Wojtaszek, Radoslaw – 0-1 – Sjugirov, Sanan – G225

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- 6...e5 7.Nb3 Be7, B20 - B99 - 1. e4 c5 - Sicilian Defense, B90-B99 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 Sicilian, Najdorf, B92a - 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 - Sicilian Defense: Najdorf Variation, Opocensky Variation, B92f - (not 8.Be3, 8.O-O), SÉRIE B 1.e4 2....
Qatar Masters Open 2015 – Round 7.1 – Carlsen, Magnus – 1/2-1/2 – Aadvika Giri – G226

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- D50-D69 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Queen's Gambit Declined, 4.Bg5, D56 - 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. e3 Ne4 - Queen's Gambit Declined: Lasker Defense, SÉRIE D
Qatar Masters Open 2015 – Round 7.10 – Korobov, Anton – 0-1 – Nguyen, Ngoc Truong Son – G227

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