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- 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, E05m - 10.* - Open, Classical, SÉRIE E
Riga FIDE Grand Prix 2019 – Round 1.2 – Harikrishna, Pentala – 1/2-1/2 – So, Wesley – G10
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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-B99 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 Sicilian, Najdorf, B90a - 6.* - Najdorf Variation (1926), SÉRIE B 1.e4 2....
Riga FIDE Grand Prix 2019 – Round 1.3 – Karjakin, Sergey – 1-0 – Giri, Anish – G17
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- D80-D99 Gruenfeld defence1. d4 Nf6 2. c4 g6 3. Nc3 d5, D94 - 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3 - Grünfeld Defense: Three Knights Variation, Burille Variation, D94o - 7.O-O - Gruenfeld: Slav/Schlecter (1922), SÉRIE D
Riga FIDE Grand Prix 2019 – Round 1.4 – Aronian, Levon – 1/2-1/2 – Yu, Yangyi – G23
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