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- 6.O-O O-O — Main Line, E01-E09 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Catalan, closed, E05a - 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 Be7 - Catalan Opening: Open Defense, Classical Line, E05i - 1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. g3 Be7 5. Bg2 O-O 6. O-O dxc4 7. Qc2, SÉRIE E
FIDE World Cup 2017 – Round 2.3 – Bu, Xiangzhi – 1/2-1/2 – Bacrot, Etienne – G270

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- 8.Nc3 Ne4, D70-D79 1. d4 Nf6 2. c4 g6 3. f3 d5 Neo-Gruenfeld defence, D79a - 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 c6 6. O-O d5 7. cxd5 cxd5 - Neo-Grünfeld Defense: Ultra-Delayed Exchange Variation, D79e - 9.Nxe4, SÉRIE D
FIDE World Cup 2017 – Round 2.3 – Cori, Jorge – 1/2-1/2 – Grischuk, Alexander – G264

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- E20-E59 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 Nimzo-Indian defence, E54 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 - Nimzo-Indian Defense: Normal Variation, Gligoric System, Exchange Variation, SÉRIE E
FIDE World Cup 2017 – Round 2.3 – Kravtsiv, Martyn – 0-1 – Ding, Liren – G256

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- D20-D29 1. d4 d5 2. c4 dxc4 Queen's gambit accepted, D27a - 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 - Queen's Gambit Accepted: Classical Defense, Main Line, D27l - 7.dxc5 (not 7...Qxd1), SÉRIE D
FIDE World Cup 2017 – Round 2.3 – Lenic, Luka – 1/2-1/2 – Caruana, Fabiano – G257

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- 6.Nbd2 O-O — Capablanca, E12-E19 1. d4 Nf6 2. c4 e6 3. Nf3 b6 Queen's Indian defence, E16a - 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ - Queen's Indian Defense: Capablanca Variation, E16d - 7.O-O d5, SÉRIE E
FIDE World Cup 2017 – Round 2.3 – Matlakov, Maxim – 1/2-1/2 – Andreikin, Dmitry – G260

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