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- E12-E19 1. d4 Nf6 2. c4 e6 3. Nf3 b6 Queen's Indian defence, E15 - 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 - Queen’s Indian [+0.41], E15s - 4…Ba6 5.b3 Bb4+ 6.Bd2 Be7 7.Bg2 c6 8.Bc3 d5 9.Ne5 - Nimzowitsch Main Line [+0.22], SÉRIE E
Reykjavik 1987 – Round 1 – Petursson, Magnus V. – 0-1 – Portisch, Lajos – G14
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- D50-D69 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Queen's Gambit Declined, 4.Bg5, D55 - 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 - QGD [+0.18], D55j - 6…h6 7.Bxf6 Bxf6 8.Rc1 - Neo-Orthodox Gligoric Variation [+0.07], SÉRIE D
Reykjavik 1987 – Round 1 – Polugaevsky, Lev – 1/2-1/2 – Portisch, Lajos – G17
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