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- 5.O-O O-O — Janowski, 6.Bxc6 - Nimzowitsch (Paulsen) Variation, C40-C49 King's knight opening, C49 - 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 - Four Knights Game: Spanish Variation, Double Spanish, SÉRIE C
Smyslov Region Group Cup 2021 – Round 8.3 – Chigaev, Maksim – 0-1 – Artemiev, Vladislav – G80

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- A10-A39 English Opening, A28 - 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. d3 - English Opening: King's English Variation, Four Knights Variation, Flexible Line, A28 - 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4.... - English Opening, SÉRIE A
Smyslov Region Group Cup 2021 – Round 8.5 – Zvjaginsev, Vadim – 1/2-1/2 – Karpov, Anatoly – G82

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- 7.Ne5, 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
Smyslov Region Group Cup 2021 – Round 8.7 – Esipenko, Andrey – 0-1 – Rakhmanov, Aleksandr – G84

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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
Smyslov Region Group Cup 2021 – Round 8.8 – Karjakin, Sergey – 0-1 – Predke, Alexandr – G85

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- 6.Ndb5 d6 7.Nd5 - 7.Nd5, B20 - B99 - 1. e4 c5 - Sicilian Defense, B30 - B39 1.e4 c5 2. Nf3 Nc6 Sicilian defence, B33 - 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 - Sicilian Defense: Open, B33 - 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bc5 - Sicilian Defense: Four Knights Variation, Cobra Variation, B33 - 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4.... - Sicilian Defense, SÉRIE B 1.e4 2....
Smyslov Region Group Cup 2021 – Round 9.1 – Nepomniachtchi, Ian – 1-0 – Sjugirov, Sanan – G87

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