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- 6...Nbd7 (not 7.f4, 7.Bc4), 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, B94 - 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 - Sicilian Defense: Najdorf Variation, SÉRIE B 1.e4 2....
Qatar Masters Open 2015 – Round 4.17 – Zhang, Zhong – 1/2-1/2 – Ponomariov, Ruslan – G134

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- B20 - B99 - 1. e4 c5 - Sicilian Defense, B90 - 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 - Sicilian Defense: Najdorf Variation, B90 - 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3 - Sicilian Defense: Najdorf Variation, Adams Attack, B90 - 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4.... - Sicilian Defense, B90-B99 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 Sicilian, Najdorf, SÉRIE B 1.e4 2....
Qatar Masters Open 2015 – Round 4.18 – Hou, Yifan(HLJ) – 1-0 – Esen Baatarsukh – G135

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- 6.Bd2 a5 — Capablanca, 7.O-O O-O, E12-E19 1. d4 Nf6 2. c4 e6 3. Nf3 b6 Queen's Indian defence, E16 - 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ - Queen's Indian Defense: Capablanca Variation, SÉRIE E
Qatar Masters Open 2015 – Round 4.19 – Fedoseev, Vladimir – 1-0 – Xu, Jun(SD) – G136

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- (not 8.Be3, 8.O-O), 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, B92 - 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 - Sicilian Defense: Najdorf Variation, Opocensky Variation, SÉRIE B 1.e4 2....
Qatar Masters Open 2015 – Round 4.2 – Duda, Jacob – 0-1 – Carlsen, Magnus – G137

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- 10...Nbd7 11.Nbd2 Bb7 — Main Line, 12.a4, C90-C99 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 Ruy Lopez, closed, C95 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nb8 10. d4 - Ruy Lopez: Closed, Breyer, SÉRIE C
Qatar Masters Open 2015 – Round 4.20 – Bok, Benjamin – 0-1 – Bologan, Victor – G138

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- 8.Be2 Bb7 — Tartakower, 9.Bxf6 Bxf6 10.cxd5 exd5 11.O-O, D50-D69 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Queen's Gambit Declined, 4.Bg5, D58 - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 h6 6. Bh4 O-O 7. e3 b6 - Queen's Gambit Declined: Tartakower Defense, SÉRIE D
Qatar Masters Open 2015 – Round 4.23 – Nguyen, Ngoc Truong Son – 1/2-1/2 – Gagare, Shardul – G141

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- A80-A99 1. d4 f5 Dutch, A88 - 1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. Nf3 Bg7 5. O-O O-O 6. c4 d6 7. Nc3 c6 - Dutch Defense: Leningrad Variation, Warsaw Variation, A88 - 1. d4 f5 2. g3 Nf6 3. Bg2 g6 4.... - Dutch Defense, SÉRIE A
Qatar Masters Open 2015 – Round 4.24 – Xu, Yinglun – 1-0 – Srinivasan Sethuraman – G142

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- 7...Bf5 - Larsen System, 7.O-O Bf5, E60-E99 1. d4 Nf6 2. c4 g6 King's Indian defence, E62 - 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nc6 - King's Indian Defense: Fianchetto Variation, Carlsbad Variation, SÉRIE E
Qatar Masters Open 2015 – Round 4.25 – Sasikiran, Krishnan – 1/2-1/2 – Wang, Yiye – G143

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