D28a — Classical
1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2
Eval: [+0.08]
Les coups candidats
Ambassadeurs : Garcia Palermo, Carlos Horacio (16x), Golz, Werner (13x), Reshevsky, Samuel (12x), Suetin, Alexey S (11x), Krallmann, Matthias (10x), Jussupow, Artur (10x), ? (10x), Pilnik, Herman (9x)
Ambassadeurs : Euwe, Max (11x), Radulov, Ivan (8x), Gruenfeld, Ernst (7x), Landau, Salo (6x), Flohr, Salo (5x), Alekhine, Alexander (4x), Book, Eero (4x), Stahlberg, Gideon (4x)
Ambassadeurs : Fine, Reuben (2x), Najdorf, Miguel (2x), Westerinen, Heikki M.J. (2x), Konopelchenkova, Tatyana (2x), Jedrzejowski, Maciej (2x), Haynes, Nicolas (2x), Galopoulos, Nikolaos (2x), Koblencs, Alexander (1x)
7…Nbd7 — 2.0% (68 parties)
Ambassadeurs : Alekhine, Alexander (3x), Keres, Paul (3x), Keres, Paul Petrovich (3x), Horowitz, Albert Israel (2x), Spassky, Boris Vasily (2x), Janosevic, Dragoljub (2x), Furman, Semyon (2x), Hjorth, Sune (2x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 7…b5 7…Nc6 7…cxd4 7…Nbd7
<1800 41 80% 17% 2%
1800-2200 620 79% 13% 3% 2%
2200-2600 1691 79% 14% 4% 2%
2600+ 70 84% 10% 6%
Évolution par décennie (% des parties)
Décennie N parties 7…b5 7…Nc6 7…cxd4 7…Nbd7
1890s 1 100%
1910s 3 67% 33%
1920s 10 30% 30% 10% 30%
1930s 59 47% 44% 2% 7%
1940s 104 49% 48% 2% 1%
1950s 155 68% 23% 3% 5%
1960s 189 86% 10% 2% 2%
1970s 82 66% 27% 2% 5%
1980s 340 86% 11% 1% 1%
1990s 872 84% 10% 3% 2%
2000s 825 77% 14% 5% 2%
2010s 595 78% 15% 4% 1%
2020s 187 67% 22% 5% 4%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
7…b5 78% 67% ▼ -10.8%
7…Nc6 15% 22% ▲ +7.5%
7…cxd4 4% 5% +0.4%
7…Nbd7 1% 4% ▲ +2.4%
Joueurs célèbres
Champions du monde dans cette position
Euwe, Max — 10 parties
Alekhine, Alexander — 10 parties
Smyslov, Vladimir — 5 parties
Anand, Viswanathan — 5 parties
Lasker, Emanuel — 1 partie
Tal, Mikhail — 1 partie
Karpov, Anatoly — 1 partie
Ju, Wenjun — 1 partie
Parties historiques
7…b5 — 77.6% (2657 parties)
1899 — Klatt, Otto vs Kniebel G — 1-0 — cr.
1911 — Kostic, Boris vs Důras, Oldřich — 1/2-1/2 — Carlsbad CZE
1911 — Gregory, Bernhard vs Loewy, Leopold Jr — 1-0 — Berlin GER
1925 — Gruenfeld, Ernst vs Opocensky, Karel — 1/2-1/2 — Marienbad CZE
1927 — Rabinovich, Ilya Mar vs Vilner, Yakov S — 0-1 — Moscow RUS
7…Nc6 — 15.2% (521 parties)
1910 — Alekhine, Alexander vs GoncharovRubinstei — 1-0 — Moskou consult
1926 — Rubinstein, Akiba vs Gruenfeld, Ernst — 1-0 — Semmering AUT
1926 — Alekhine, Alexander vs Janowski, Dawid — 1/2-1/2 — Semmering AUT
1928 — Steiner, Herman vs Rubinstein, Akiba — 1/2-1/2 — New York (Exhibition
1930 — Landau, Salo vs Rubinstein, Akiba — 0-1 — NED
7…cxd4 — 3.5% (119 parties)
1926 — Davidson, Jacques vs Gruenfeld, Ernst — 0-1 — Semmering AUT
1936 — Koblencs, Alexander vs Wood, Baruch — 1-0 — Margate ENG
1943 — Reshevsky, Samuel vs Fine, Reuben — 0-1 — New York USA speed ch (10-sec/move), USA
1948 — Vlagsma, Chris vs Vinken, Alex — 0-1 — Nijmegen NED
1951 — Euwe, Max vs Najdorf, Miguel — 0-1 — New York, NY USA
7…Nbd7 — 2.0% (68 parties)
1929 — Alekhine, Alexander vs Steiner, Heinrich Jun. — 1-0 — Bradley Beach
1929 — Alekhine, Alexander vs Steiner, Herman — 1-0 — Bradley Beach
1929 — Kupchik, Abraham vs Alekhine, Alexander — 1/2-1/2 — Bradley Beach
1932 — Hoenlinger, Baldur vs Gruenfeld, Ernst — 1/2-1/2 — Trebitsch mem15
1933 — Horowitz, Albert Israel vs Fine, Reuben — 0-1 — New York, NY USA