A40r — Keres Defence
1.d4 e6 2.c4 Bb4+ 3.Bd2 a5
Eval: [+0.43]
Les coups candidats
4.Nf3 — 42.5% (837 parties)
Ambassadeurs : Eingorn, Vereslav S (35x), Malakhatko, Vadim (12x), Paehtz, Elisabeth (11x), Ward, Chris G (10x), Epishin, Vladimir (9x), Psakhis, Lev (8x), Panno, Oscar (8x), Gulko, Boris (8x)
4.g3 — 19.4% (382 parties)
Ambassadeurs : Eingorn, Vereslav S (9x), Van Wely, Loek (8x), Ward, Chris G (6x), Dgebuadze, Alexandre (6x), Krallmann, Matthias (5x), Paehtz, Elisabeth (5x), Short, Nigel D (5x), Sedlak, Nikola (4x)
4.Nc3 — 18.3% (360 parties)
Ambassadeurs : Eingorn, Vereslav S (10x), Richards, Heather S (7x), Sokolov, Ivan (7x), Peralta, Fernando (6x), Gulko, Boris (4x), Meshcheriakova, Evgenia (4x), Tereick, Benjamin (4x), Mundorf, Johannes (4x)
4.a3 — 8.8% (174 parties)
Ambassadeurs : Richards, Heather S (5x), Kaid, Almar, Dr. (3x), Karagiannis, Athanasios NA (3x), Sedlak, Nikola (3x), Gorlanov, Vladislav (2x), Malakhatko, Vadim (2x), Wiesner, Paula (2x), Aranaz Murillo, Amalia (2x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 4.Nf3 4.g3 4.Nc3 4.a3
<1800 20 35% 35% 20%
1800-2200 380 38% 16% 19% 17%
2200-2600 1403 44% 21% 18% 6%
2600+ 84 45% 21% 23% 5%
Évolution par décennie (% des parties)
Décennie N parties 4.Nf3 4.g3 4.Nc3 4.a3
1960s 3 33% 67%
1970s 1
1980s 93 56% 13% 6% 1%
1990s 349 50% 17% 15% 7%
2000s 469 47% 16% 19% 7%
2010s 908 36% 23% 21% 10%
2020s 148 41% 14% 16% 16%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
4.Nf3 36% 41% ▲ +4.9%
4.g3 23% 14% ▼ -8.9%
4.Nc3 21% 16% ▼ -4.5%
4.a3 10% 16% ▲ +5.3%
Joueurs célèbres
Champions du monde dans cette position
Ju, Wenjun — 2 parties
Tal, Mikhail — 1 partie
Karpov, Anatoly — 1 partie
Parties historiques
4.Nf3 — 42.5% (837 parties)
1960 — Veresov, Gavriil vs Bronstein, David I — 0-1 — Moscow RUS
1980 — Karlsson, Mats 1976 vs Wicker, Kevin J — 1-0 — Politiken Cup
1981 — Petrosian, Arshak B vs Eingorn, Vereslav S — 0-1 — Moscow RUS
1982 — Farago, Ivan vs Short, Nigel D — 1/2-1/2 — Hastings ENG
1983 — Langeweg, Kick vs Timman, Jan H — 1/2-1/2 — Hilversum ch-NED
4.g3 — 19.4% (382 parties)
1962 — Muehlberg, Siegfried vs Moehring, Guenther — 0-1 — GDR-ch Gera GER
1969 — Huguet, Francois vs Sanner, Michel — 1/2-1/2 — Pau
1982 — Rodriguez Cespedes, Amador vs Vera Gonzalez-Quevedo, Reynaldo — 1-0 — Havana CUB
1982 — Ligterink, Gert vs Short, Nigel D — 1-0 — Marbella I zt
1983 — Grivas, Efstratios vs Skalkotas, Nikolaos — 1/2-1/2 — Heraklion
4.Nc3 — 18.3% (360 parties)
1984 — Timoscenko, Gennadij vs Lputian, Smbat — 1-0 — Minsk BLR
1987 — Timoscenko, Gennadij vs Graf, Alexander — 0-1 — Tashkent UZB
1988 — Korchnoi, Viktor vs Dolmatov, Sergey — 1/2-1/2 — Madrid ESP
1989 — Korchnoi, Viktor vs Passager, Jean-Pierre — 1-0 — Bordeaux FRA
1989 — Tisdall, Jonathan D vs Korchnoi, Viktor — 1-0 — Haifa ISR
4.a3 — 8.8% (174 parties)
1989 — Karagiannis, Athanasios NA vs Keitlinghaus, Ludger — 1-0 — Corfu GRE
1990 — Simon, Holger vs Kuhn, Clemens — 1/2-1/2 — Munster C chy-D
1990 — Santolini, Luigi vs King, Daniel J — 0-1 — Cappelle la Grande FRA
1991 — Pirnat, Saso vs Kastelic, Marian — 0-1 — Slovenia ch
1992 — Stokstad, Petter G. vs Lupu, Mircea-Sergiu — 0-1 — Parthenay FRA