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- A10-A39 English Opening, A26 - 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 - English Opening: King's English Variation, Closed System, Full Symmetry, A26 - 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. e4 - English Opening: King's English Variation, Botvinnik System, A26 - 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4.... - English Opening, SÉRIE A
Johannesburg 1981 – Round 1 – Andersson, Ulf 1949 – 1-0 – Nunn, John D M – G7

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- 6.Bb5 Bd6 — Main Line, 7.O-O Ne7 8.dxc5 Bxc5 9.Nb3 Bd6 10.Re1 O-O 11.Bg5 — Main Line, C00-C19 1. e4 e6 French defence, C09 - 1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 exd5 5. Ngf3 Nc6 - French Defense: Tarrasch Variation, Open System, Main Line, SÉRIE C
Johannesburg 1981 – Round 1 – Huebner, Robert – 1-0 – Korchnoi, Viktor – G5

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- 6...h6 7.h3 Nc6 8.Bg2, B20 - B99 - 1. e4 c5 - Sicilian Defense, B80-B85 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 Sicilian, Scheveningen variation, B81 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. g4 - Sicilian Defense: Scheveningen Variation, Keres Attack, B81 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4.... - Sicilian Defense, SÉRIE B 1.e4 2....
Johannesburg 1981 – Round 1 – Huebner, Robert – 1/2-1/2 – Andersson, Ulf 1949 – G3

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- 6.g3 Nc6 — Main Line, 7.Bg2 Be7 8.O-O O-O 9.e4 Ndb4 — Main Line, D40-D42 – 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 – Queen’s Gambit Declined: Semi-Tarrasch Defense, D41 - 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. g3 d5 5. d4 e6 - Queen's Gambit Declined: Semi-Tarrasch Defense, SÉRIE D
Johannesburg 1981 – Round 1 – Korchnoi, Viktor – 1-0 – Huebner, Robert – G1

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- 6.Bb5 Bd6 — Main Line, 7.O-O Ne7 8.dxc5 Bxc5 9.Nb3 Bd6 10.Re1 O-O 11.Bg5 — Main Line, C00-C19 1. e4 e6 French defence, C09 - 1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 exd5 5. Ngf3 Nc6 - French Defense: Tarrasch Variation, Open System, Main Line, SÉRIE C
Johannesburg 1981 – Round 2 – Huebner, Robert – 1-0 – Korchnoi, Viktor – G11

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- E60-E99 1. d4 Nf6 2. c4 g6 King's Indian defence, E96 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nbd7 8. Re1 c6 9. Bf1 a5 - King's Indian Defense: Orthodox Variation, Positional Defense, Main Line, SÉRIE E
Johannesburg 1981 – Round 2 – Huebner, Robert – 1-0 – Nunn, John D M – G8

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- 6...Bb4 (not 7.Nb3, 7.Bf4), A10-A39 English Opening, A33 - 1. c4 e6 2. Nf3 Nf6 3. Nc3 c5 4. d4 Nc6 5. g3 cxd4 6. Nxd4 Qb6 - English Opening: Symmetrical Variation, Anti-Benoni Variation, Geller Variation, A33 - 1. c4 e6 2. Nf3 Nf6 3. Nc3 c5 4.... - English Opening, SÉRIE A
Johannesburg 1981 – Round 2 – Korchnoi, Viktor – 1-0 – Andersson, Ulf 1949 – G1

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