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- E01-E09 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Catalan, closed, E03 - 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Qa4+ Nbd7 6.Qxc4 - Catalan Opening: Open Defense (1954), E03l - 6…c5 7.Nf3 a6 8.Qc2 - Open (1943), SÉRIE E
Johannesburg 1981 – Round 1 – Andersson, Ulf 1949 – 1/2-1/2 – Korchnoi, Viktor – G6
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- 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, C09p - 6.Bb5 Bd6 7.O-O Ne7 8.dxc5 Bxc5 9.Nb3 Bd6 10.Re1 O-O 11.Bg5 - Tarrasch, Open, Main Line (1957), SÉRIE C
Johannesburg 1981 – Round 1 – Huebner, Robert – 1-0 – Korchnoi, Viktor – G5
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- 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 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.g4 - Sicilian, B81i - 6…h6 7.h3 Nc6 8.Bg2 - Scheveningen, Keres (1953), SÉRIE B 1.e4 2....
Johannesburg 1981 – Round 1 – Huebner, Robert – 1/2-1/2 – Andersson, Ulf 1949 – G3
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- E60-E99 1. d4 Nf6 2. c4 g6 King's Indian defence, E94 - 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O - King's Indian Defense: Orthodox Variation, E94s - 7…Nbd7 8.Qc2 - King’s Indian (1949), SÉRIE E
Johannesburg 1981 – Round 1 – Korchnoi, Viktor – 0-1 – Nunn, John D M – G2
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- D40-D42 – 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 – Queen’s Gambit Declined: Semi-Tarrasch Defense, D41 - 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 5.cxd5 - QGD, D41g - 5…Nxd5 6.g3 Nc6 7.Bg2 Be7 8.O-O O-O 9.e4 Ndb4 - Semi-Tarrasch, Main Line (1965), SÉRIE D
Johannesburg 1981 – Round 1 – Korchnoi, Viktor – 1-0 – Huebner, Robert – G1
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- 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, C09p - 6.Bb5 Bd6 7.O-O Ne7 8.dxc5 Bxc5 9.Nb3 Bd6 10.Re1 O-O 11.Bg5 - Tarrasch, Open, Main Line (1957), 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 (1952), E96f - 10.dxe5 dxe5 - King’s Indian, Old Main Line (1954), SÉRIE E
Johannesburg 1981 – Round 2 – Huebner, Robert – 1-0 – Nunn, John D M – G8
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