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- 7...c5 8.Be2 O-O — Exchange, 9.O-O Nc6, D80-D99 Gruenfeld defence1. d4 Nf6 2. c4 g6 3. Nc3 d5, D85 - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 - Grünfeld Defense: Exchange Variation, Modern Exchange Variation, D85 - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5- Grünfeld Defense, SÉRIE D
Hoogovens 1978 – Round 1 – Korchnoi, Viktor – 1/2-1/2 – Timman, Jan H – G21

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- 7...Ne4 8.Nxe4 Bxe4, 9.Ne1 Bxg2 10.Nxg2 d5, E12-E19 1. d4 Nf6 2. c4 e6 3. Nf3 b6 Queen's Indian defence, E18 - 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 - Queen's Indian Defense: Classical Variation, Traditional Variation, SÉRIE E
Hoogovens 1978 – Round 1 – Mecking, Henrique – 1/2-1/2 – Portisch, Lajos – G11

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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
Hoogovens 1978 – Round 1 – Miles, Anthony J – 1/2-1/2 – Portisch, Lajos – G3

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- A10-A39 English Opening, A17 - 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3 c5 5. e3 e6 - English Opening: Anglo-Indian Defense, A17 - 1. c4 Nf6 2. Nc3 e6 - English Opening: Anglo-Indian Defense, Hedgehog System, SÉRIE A
Hoogovens 1978 – Round 1 – Portisch, Lajos – 1-0 – Najdorf, Miguel – G6

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- A10-A39 English Opening, A17 - 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3 c5 5. e3 e6 - English Opening: Anglo-Indian Defense, A17 - 1. c4 Nf6 2. Nc3 e6 - English Opening: Anglo-Indian Defense, Hedgehog System, SÉRIE A
Hoogovens 1978 – Round 1 – Portisch, Lajos – 1/2-1/2 – Andersson, Ulf 1949 – G7

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- 6.Bd2 Qe7 — Capablanca, 7.O-O Bxd2 8.Qxd2, E12-E19 1. d4 Nf6 2. c4 e6 3. Nf3 b6 Queen's Indian defence, E16 - 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ - Queen's Indian Defense: Capablanca Variation, SÉRIE E
Hoogovens 1978 – Round 1 – Ree, Hans – 1/2-1/2 – Korchnoi, Viktor – G12

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