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- D50-D69 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Queen's Gambit Declined, 4.Bg5, D66 - 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 - QGD [+0.25], D66j - 8…h6 9.Bh4 dxc4 10.Bxc4 - Orthodox Main Line [+0.21], SÉRIE D
1929 Karlsbad – Round 1 – Saemisch, Friedrich – 1-0 – Thomas, George Alan – G63

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- D50-D69 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Queen's Gambit Declined, 4.Bg5, D66 - 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 - QGD [+0.25], D66k - 8…h6 9.Bh4 dxc4 10.Bxc4 b5 - Orthodox Main Line [+0.29], SÉRIE D
1929 Karlsbad – Round 12 – Saemisch, Friedrich – 1/2-1/2 – Becker, Albert – G183

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- D50-D69 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Queen's Gambit Declined, 4.Bg5, D66 - 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 - QGD [+0.25], D66a - 8.Bd3 - Orthodox Main Line [+0.22], SÉRIE D
1929 Odessa ch-URS – Round 1 – Freiman, Sergey Nikolaevich – 0-1 – Botvinnik, Mikhail – G4

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- D50-D69 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Queen's Gambit Declined, 4.Bg5, D66 - 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 - QGD [+0.25], D66a - 8.Bd3 - Orthodox Main Line [+0.22], SÉRIE D
1930 Hamburg ol (Men) – Round 14.4 – Pokorny, Amos – 0-1 – Sembergas, M – G25

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- D50-D69 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Queen's Gambit Declined, 4.Bg5, D66 - 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 - QGD [+0.25], D66g - 8…dxc4 9.Bxc4 - Orthodox Main Line [+0.22], SÉRIE D
1930 Hastings 3031 – Round 2 – Capablanca, Jose – 1-0 – Yates, Frederic D – G5

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- D50-D69 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Queen's Gambit Declined, 4.Bg5, D66 - 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 - QGD [+0.25], D66j - 8…h6 9.Bh4 dxc4 10.Bxc4 - Orthodox Main Line [+0.21], SÉRIE D
1930 Prague Ch – Round 3 – Dobias, Josef – 1-0 – Kubanek, Jindrich – G7

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- D50-D69 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Queen's Gambit Declined, 4.Bg5, D66 - 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 - QGD [+0.25], D66b - 8…a6 - Orthodox Main Line [+0.50], SÉRIE D
1930 San Remo – Round 14 – Vidmar, Milan Sr – 0-1 – Yates, Frederic D – G115

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- D50-D69 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Queen's Gambit Declined, 4.Bg5, D66 - 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 - QGD [+0.25], D66b - 8…a6 - Orthodox Main Line [+0.50], SÉRIE D
1931 Buenos Aires – Round 6 – Querencio, Carlos – 0-1 – Palau, Luis – G42

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- D50-D69 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Queen's Gambit Declined, 4.Bg5, D66 - 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 - QGD [+0.25], D66d - 8…Re8 - Orthodox Main Line [+0.44], SÉRIE D
1931 It Bled SLO – Round 25 – Stoltz, Gösta – 1-0 – Maroczy, Geza – G18

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- D50-D69 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Queen's Gambit Declined, 4.Bg5, D66 - 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 - QGD [+0.25], D66b - 8…a6 - Orthodox Main Line [+0.50], SÉRIE D
1931 Moskou ch-URS – Round 1 – Sorokin, Nikolay – 0-1 – Rauzer, Vsevolod – G23

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- D50-D69 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Queen's Gambit Declined, 4.Bg5, D66 - 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 - QGD [+0.25], D66b - 8…a6 - Orthodox Main Line [+0.50], SÉRIE D
1931 Moskou ch-URS – Round 1 – Sozin, Veniamin – 1/2-1/2 – Rauzer, Vsevolod – G18

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