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- 6.O-O O-O — Main Line, 7.Qc2 a6 8.a4 Bd7 9.Qxc4 Bc6 10.Bg5 Bd5, E01-E09 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Catalan, closed, E05 - 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 Be7 - Catalan Opening: Open Defense, Classical Line, SÉRIE E
85. Tata Steel Masters 2023 – Round 1.1 – Carlsen, Magnus – 1/2-1/2 – Aronian, Levon – G1

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- 4...Ba6 5.b3 Bb4+ — Main Line, 6.Bd2 Be7 7.Bg2 d5 8.cxd5 exd5 9.O-O O-O, E12-E19 1. d4 Nf6 2. c4 e6 3. Nf3 b6 Queen's Indian defence, E15 - 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 - Queen's Indian Defense: Fianchetto Variation, SÉRIE E
85. Tata Steel Masters 2023 – Round 1.3 – Gukesh D – 0-1 – Ding, Liren – G3

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- D80-D99 Gruenfeld defence1. d4 Nf6 2. c4 g6 3. Nc3 d5, D87 - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O - Grünfeld Defense: Exchange Variation, Spassky Variation, D87 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O Grünfeld Defense: Exchange Variation, Spassky Variation|, SÉRIE D
85. Tata Steel Masters 2023 – Round 1.6 – Praggnanandhaa R – 1/2-1/2 – Erigaisi Arjun – G6

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- 6.O-O O-O — Main Line, 7.Qc2 a6 8.a4 Bd7 9.Qxc4 Bc6, E01-E09 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Catalan, closed, E05 - 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 Be7 - Catalan Opening: Open Defense, Classical Line, SÉRIE E
85. Tata Steel Masters 2023 – Round 10.2 – So, Wesley – 1/2-1/2 – Aadvika Giri – G65

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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
85. Tata Steel Masters 2023 – Round 10.5 – Caruana, Fabiano – 1/2-1/2 – Erigaisi Arjun – G68

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