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A23a — Bremen Keres System
1.c4 e5 2.Nc3 Nf6 3.g3 c6
Eval: [+0.18]
Les coups candidats
Ambassadeurs : Vetter, Udo (13x), Boll, Peter (6x), Basagic, Zlatko (6x), Rosenberg, Clemens von (6x), Kudoke, Willy (6x), Stavrakakis, Vasilios (5x), Raetsky, Alexander (5x), Leisebein, Peter (5x)
Ambassadeurs : Leisebein, Peter (17x), Nadenau, Oskar (10x), Taimanov, Mark (8x), Schuler, Georg (8x), Grott, Peter (8x), Schindler, Sven (8x), Golz, Werner (7x), Ivkov, Borislav (6x)
4.d4 — 25.0% (1242 parties)
Ambassadeurs : Miezis, Normunds (8x), Leisebein, Peter (6x), Weyerstrass, Ronald (5x), Rahls, Peter (5x), Boll, Peter (4x), Albarran, Gustavo (4x), Geenen, Marc (4x), Keres, P. (3x)
4.e4 — 3.1% (153 parties)
Ambassadeurs : Schmitzer, Heinrich (3x), Tausch, Dirk (2x), Mejzlik, Ondrej (2x), Jamba, Alexandru (2x), Eisgrau, Sigfried (1x), Gandarias Geller, Marcos (1x), Deslauriers, J. (1x), Groiss, Werner (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 4.Bg2 4.Nf3 4.d4 4.e4
<1800 256 59% 15% 19% 5%
1800-2200 1788 39% 27% 28% 4%
2200-2600 1090 21% 39% 38% 1%
2600+ 30 3% 63% 33%
Évolution par décennie (% des parties)
Décennie N parties 4.Bg2 4.Nf3 4.d4 4.e4
1890s 2 100%
1900s 1 100%
1920s 8 38% 12% 50%
1930s 6 67% 33%
1950s 70 29% 41% 29% 1%
1960s 175 22% 67% 10% 1%
1970s 258 18% 63% 17% 0%
1980s 314 25% 53% 18% 2%
1990s 940 40% 36% 20% 3%
2000s 1452 43% 26% 25% 3%
2010s 1383 41% 22% 32% 4%
2020s 363 26% 40% 28% 4%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
4.Bg2 41% 26% ▼ -14.8%
4.Nf3 22% 40% ▲ +18.5%
4.d4 32% 28% ▼ -3.9%
4.e4 4% 4% ▲ +0.7%
Joueurs célèbres
Champions du monde dans cette position
Botvinnik, Mikhail — 6 parties
Smyslov, Vladimir — 3 parties
Tal, Mikhail — 3 parties
Karpov, Anatoly — 2 parties
Kasparov, Garry — 2 parties
Euwe, Max — 1 partie
Parties historiques
4.Bg2 — 37.1% (1847 parties)
1898 — Delmar, Eugene vs Koehler, Gustav Henschel — 0-1 — New York, NY USA
1898 — Delmar, Eugene vs Koehler, Gustav Henschel — 0-1 — New York, NY USA
1903 — Tarrasch, Siegbert vs Reggio, Arturo — 1-0 — Monte Carlo MNC
1923 — Kersten, J L vs Haalebos, FC. — 0-1 — NED
1923 — Euwe, Max vs Bogoljubow, Efim — 1/2-1/2 — Maehrisch Ostrau
4.Nf3 — 32.9% (1637 parties)
1928 — Beutum, Sigmund vs Wolf, Siegfried — 1/2-1/2 — Vienna AUT
1955 — Averbakh, Yuri L vs Ragozin, Viacheslav — 1-0 — Moscow RUS
1955 — Taimanov, Mark vs Vladimirov, Boris T — 1/2-1/2 — Leningrad RUS
1955 — Taimanov, Mark vs Gawlikowski, Stanislaw — 1/2-1/2 — Lodz POL
1957 — Doda, Zbigniew vs Plater, Kazimierz — 1/2-1/2 — Szczawno Zdroj
4.d4 — 25.0% (1242 parties)
1921 — Tenner, Oscar vs Bogoljubow, Efim — 0-1 — Berlin GER
1924 — Kinch, Svend vs Giersing, Johannes H — 1-0 — Copenhagen DEN
1925 — Capablanca, Jose vs Emil Gross — 1/2-1/2 — Warsaw POL
1925 — Jacobs, Herbert Levi vs Gooding, William — 1/2-1/2 — Stratford-upon-Avon
1935 — Laaman, Thomas R vs Keres, P. — 0-1 — cr.
4.e4 — 3.1% (153 parties)
1950 — Eisgrau, Sigfried vs Gandarias Geller, Marcos — 1-0 — Los Angeles, CA USA
1960 — Deslauriers, J. vs Groiss, Werner — 0-1 — Leipzig GER
1976 — Seliger, Bedrich vs Radojevic, Zoran M — 1/2-1/2 — Decin CZE
1982 — Whymark vs Naldrett, Geoffrey — 1-0 — corr GB
1984 — Naehr, Erik vs Brattstrom Nilsson, Adam — 0-1 — Frederiksvark