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- 6.O-O O-O — Main Line, 7.Ne5, 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
Saint Louis Rapid 2019 – Round 4.3 – Rapport, Richard – 0-1 – Dominguez Perez, Leinier – G18

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- 3...e6 (not 4.e3), 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
Saint Louis Rapid 2019 – Round 5.1 – Carlsen, Magnus – 0-1 – Aronian, Levon – G21

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- 7.Qb3 Qb6, 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
Saint Louis Rapid 2019 – Round 5.2 – Mamedyarov, Shakhriyar – 0-1 – Vachier-Lagrave, Maxime – G22

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