D27b - 7.b3 - QGA: Classical (1958)

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D27b — QGA: Classical (1958)
1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.b3
Les coups candidats
7…cxd4 — 38.2% (581 parties)
Ambassadeurs : Ilyin, Pavel Egorovich (18x), Vachier-Lagrave, Maxime (11x), Gerhards, Guntis (10x), Vinchev, Simeon (10x), Deforel, Jorge Eduardo (8x), Timofeev, Artyom (8x), Morley, Paul (6x), Hoang, Thanh Trang (5x)
7…b5 — 23.8% (361 parties)
Ambassadeurs : Volodarsky, Yury Aleksandrovich (6x), Seelig, Jürgen (4x), Vujovic, Vera (4x), Edouard, Romain (3x), Inarkiev, Ernesto (3x), Casimiro Gabriel Luanda (2x), Graf, Rena (2x), Boensch, Uwe (2x)
7…Nbd7 — 17.2% (261 parties)
Ambassadeurs : Ozen, Bahadir (9x), Mannion, Stephen R (6x), Riccio, Eros (4x), Perevozchikov, Vjacheslav (4x), Oberoi, Shelev (4x), Malaniuk, Vladimir P (3x), Legrand, Stephane (3x), Hoang, Thanh Trang (2x)
7…Nc6 — 13.8% (209 parties)
Ambassadeurs : Baikov, Vladimir A (5x), Varga, Zoltan (3x), Botsari, Anna-Maria (3x), Sadler, Matthew D (3x), Hoang, Thanh Trang (2x), Legky, Nikolay A (2x), Aleksandrov, Aleksej (2x), Volzhin, Alexander (2x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 7…cxd4 7…b5 7…Nbd7 7…Nc6
<1800 60 40% 37% 18% 5%
1800-2200 391 40% 30% 16% 10%
2200-2600 914 37% 20% 19% 16%
2600+ 100 49% 11% 16% 8%
Évolution par décennie (% des parties)
Décennie N parties 7…cxd4 7…b5 7…Nbd7 7…Nc6
1950s 1 — 100% — —
1980s 10 10% 60% — 30%
1990s 189 22% 26% 17% 26%
2000s 188 29% 29% 10% 22%
2010s 522 49% 25% 10% 10%
2020s 610 37% 20% 25% 10%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
7…cxd4 49% 37% ▼ -11.8%
7…b5 25% 20% ▼ -5.4%
7…Nbd7 10% 25% ▲ +15.1%
7…Nc6 10% 10% +0.4%
Joueurs célèbres
Champions du monde dans cette position
Ding, Liren — 3 parties
Carlsen, Magnus — 2 parties
Gukesh D — 2 parties
Karpov, Anatoly — 1 partie
Parties historiques
7…cxd4 — 38.2% (581 parties)
1988 — Seirawan, Yasser vs Lein, Andreas — 1-0 — World Open
1990 — Miles, Anthony J vs Ivanchuk, Vasyl — 1/2-1/2 — Moscow RUS
1993 — Kiriakov, Petr vs Mesropov, Konstantin — 1/2-1/2 — Voskresensk,RUS
1993 — Maiwald, Jens-Uwe vs Dao, Thien Hai — 1-0 — Budapest HUN
1993 — Rodriguez, Jorge Luis vs Ricardi, Pablo — 1-0 — Buenos Aires FMDAsup
7…b5 — 23.8% (361 parties)
1958 — Szilagyi, Gyorgy Laszlo vs Golz, Werner — 1/2-1/2 — Sofia BUL
1981 — Tessars, Roland vs Rasch, Dieter, Dr. — 0-1 — GER
1982 — Deschamps, Julio Cesar vs Braitt, Milton Dos Santos — 0-1 — Blumenau
1985 — Vogt, Peter vs Van der Poel, T. — 0-1 — Groningen NED
1987 — Paehtz, Thomas vs Gruenberg, Hans-Ulrich — 1/2-1/2 — Glauchau
7…Nbd7 — 17.2% (261 parties)
1991 — Luik, Helmuth vs Kekki, Petri — 1-0 — FIN-chT
1991 — Zsinka, Laszlo vs Putzbach, Gerd — 1-0 — Hamburg GER
1992 — Schlosser, Philipp vs Maiwald, Jens-Uwe — 1-0 — Munchen open
1992 — Malaniuk, Vladimir P vs Donchenko, Anatoly — 1-0 — Moscow RUS
1993 — Hoang, Thanh Trang vs Sapi, Laszlo — 1/2-1/2 — Budapest HUN
7…Nc6 — 13.8% (209 parties)
1987 — Chernin, Alexander vs Speelman, Jon S — 0-1 — Subotica SRB
1988 — Dzindzichashvili, Roman vs Scherzer, Grant — 1-0 — USA
1989 — Murugan, Krishnamoorthy vs Vladimirov, Yevgeniy — 0-1 — Alma Ata KAZ
1991 — Keitlinghaus, Ludger vs Thesing, Matthias — 1-0 — Dortmund III
1991 — Malisauskas, Vidmantas vs Gelpke, Peter — 1-0 — Groningen open