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- 6.Nc3 O-O, E01-E09 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Catalan, closed, E05a - 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 Be7 - Catalan Opening: Open Defense, Classical Line, E05d - 7.Ne5, SÉRIE E
FIDE World Cup 2019 – Round 2.4 – Christiansen, Johan-Sebastian – 1/2-1/2 – Alekseenko, Kirill – G286

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- C60a - C69 1. e4 e5 2. Nf3 Nc6 3. Bb5 Ruy Lopez (Spanish opening), C67a - 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 - Ruy Lopez: Berlin Defense, Rio Gambit Accepted, C67d - 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. Re1 Nd6 6. Nxe5 - Ruy Lopez: Berlin Defense, Rio Gambit Accepted, SÉRIE C
FIDE World Cup 2019 – Round 2.4 – Gemma Jones Ndjoli – 0-1 – Jakovenko, Dmitry – G284

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- 9...Bg4 10.d5 Na5, 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, C91a - 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. d4 - Ruy Lopez: Closed, Yates Variation, C91i - 11.Bc2 c6 12.h3 Bc8, SÉRIE C
FIDE World Cup 2019 – Round 2.4 – Huschenbeth, Niclas – 0-1 – Vitiugov, Nikita – G283

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- D50-D69 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Queen's Gambit Declined, 4.Bg5, D63 - 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 b6 8. cxd5 exd5 9. Bd3 - Queen's Gambit Declined: Orthodox Defense, Pillsbury Variation, SÉRIE D
FIDE World Cup 2019 – Round 2.4 – Radjabov, Teimour – 1-0 – Sjugirov, Sanan – G287

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- 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, B93 - 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4.... - Sicilian Defense, B93a - 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 - Sicilian Defense: Najdorf Variation, Amsterdam Variation, B93g - 6...Qc7 7.Bd3 g6, SÉRIE B 1.e4 2....
FIDE World Cup 2019 – Round 2.4 – Yu, Yangyi – 1/2-1/2 – Adhiban, B. – G281

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