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- 5...a6 6.O-O Nc6, 7.Ne5 Bd7 8.Na3 cxd4 9.Naxc4, E01-E09 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Catalan, closed, E04 - 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 - Catalan Opening: Open Defense, SÉRIE E
83. Tata Steel Masters 2021 – Round 8.7 – Donchenko, Alexander – 1/2-1/2 – Aditya Tari – G59

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- 6.d3 b5, 7.Bb3, C80-C89 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 & C84-C89 C84 5. O-O Be7 Ruy Lopez, closed defence, C84 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 - Ruy Lopez: Closed, SÉRIE C
83. Tata Steel Masters 2021 – Round 9.3 – Van Foreest, Jorden – 1/2-1/2 – Donchenko, Alexander – G62

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- 3...c5 4.e3 e6, 5.c3 Nc6, D00-D06 1. d4 d5 Queen's pawn game, D02 - 1. d4 d5 2. Nf3 - Queen's Pawn Game: Zukertort Variation, D02 - 1. d4 d5 2. Nf3 Nf6 - Queen's Pawn Game: Symmetrical Variation, D02 - 1. d4 d5 2. Nf3 Nf6 3. Bf4 - Queen's Pawn Game: London System, SÉRIE D
83. Tata Steel Masters 2021 – Round 9.5 – Firouzja, Alireza – 1/2-1/2 – Esipenko, Andrey – G64

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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....
83. Tata Steel Masters 2021 – Round 9.6 – Aadvika Giri – 1-0 – Vachier-Lagrave, Maxime – G65

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- 4.Nxd4 Nf6 5.Nc3 e5 6.Bb5+ - Venice Attack, B20 - B99 - 1. e4 c5 - Sicilian Defense, B50-B59 Sicilian 1. e4 c5 2. Nf3 d6, B56 - 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 - Sicilian Defense: Classical Variation, B56 - 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4.... - Sicilian Defense, SÉRIE B 1.e4 2....
83. Tata Steel Masters 2021 – Round 9.7 – Anton Guijarro, David – 1/2-1/2 – Harikrishna, Pentala – G66

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