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E04a — Open
1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Nf3
Les coups candidats
Ambassadeurs : Rawlings, Alan J C (41x), Pérez López, Alberto (41x), Deforel, Jorge Eduardo (37x), Sveshnikov, Evgeny (35x), Novikov, Igor (29x), Dorer, Manfred (29x), Salzmann, Stefan (26x), Beliavsky, Alexander G (21x)
Ambassadeurs : Langer, Raimund (25x), Gleizerov, Evgeny (18x), Aleksandrov Ivanchev, Aleksandar (18x), Frolyanov, Dmitry (17x), Raetsky, Alexander (16x), Krasenkow, Michal (16x), Naiditsch, Arkadij (16x), Luther, Thomas (15x)
Ambassadeurs : Lu, Shanglei (32x), Sokolov, Andrei (27x), Inkiov, Ventzislav (21x), Fridman, Daniel (17x), Stukalov, Mikhail Vasilievich (11x), Salonen, Jukka (11x), Alburt, Lev (10x), Andersson, Ulf (10x)
Ambassadeurs : Landa, Konstantin (14x), Michenka, Jozef (13x), Korneev, Oleg (13x), Probola, Ryszard (13x), Tsvetkov, Andrey (13x), Brunello, Sabino (11x), Ilincic, Zlatko (11x), Horvath, Peter (10x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 5…a6 5…Nc6 5…c5 5…Bb4+
<1800 339 27% 21% 21% 10%
1800-2200 6510 32% 22% 16% 12%
2200-2600 15434 34% 22% 14% 13%
2600+ 1228 26% 17% 27% 15%
Évolution par décennie (% des parties)
Décennie N parties 5…a6 5…Nc6 5…c5 5…Bb4+
1930s 5 20%
1940s 30 13% 23% 3%
1950s 85 15% 2% 42% 7%
1960s 53 17% 4% 25% 9%
1970s 194 31% 3% 15% 11%
1980s 980 26% 6% 35% 3%
1990s 1701 19% 30% 21% 4%
2000s 4450 31% 30% 16% 8%
2010s 12357 35% 23% 13% 14%
2020s 5615 33% 13% 17% 16%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
5…a6 35% 33% ▼ -1.9%
5…Nc6 23% 13% ▼ -9.8%
5…c5 13% 17% ▲ +3.9%
5…Bb4+ 14% 16% ▲ +2.5%
Joueurs célèbres
Champions du monde dans cette position
Karpov, Aleksandr — 10 parties
Anand, Viswanathan — 10 parties
Karpov, Anatoly — 10 parties
Kramnik, Vladimir — 10 parties
Carlsen, Magnus — 10 parties
Ju, Wenjun — 10 parties
Gukesh D — 10 parties
Kasparov, Garry — 8 parties
Ding, Liren — 7 parties
Smyslov, Vladimir — 4 parties
Euwe, Max — 3 parties
Tal, Mikhail — 3 parties
Hou, Yifan — 3 parties
Botvinnik, Mikhail — 1 partie
Parties historiques
5…a6 — 32.5% (8268 parties)
1947 — Ozols, Karlis vs Zemgalis, Elmars — 1-0 — Hanau
1948 — Opocensky, Karel vs Fletzer, Gino — 1/2-1/2 — Venice ITA
1948 — Opocensky, Karel vs Fletzer — 1/2-1/2 — Venice ITA
1948 — Opocensky, Karel vs Castaldi, Vincenzo — 0-1 — Venice ITA
1951 — Gereben, Erno vs Pogats, Jozsef Jr. — 1-0 — Budapest HUN
5…Nc6 — 21.5% (5488 parties)
1955 — Secchi, Eduardo vs Corbijn Juan — 1-0 — cr.
1956 — Zilber, Israel vs Rovner, Dmitry — 1-0 — Leningrad RUS
1960 — Shamkovich, Leonid vs Vladimirov, Boris T — 1/2-1/2 — Moscow RUS
1961 — Bronstein, David I vs Estrin, Yakov — 1/2-1/2 — Moscow RUS
1971 — Bukic, Enver vs Cvetkovic, Srdjan — 0-1 — Portoroz SLO
5…c5 — 15.7% (4006 parties)
1939 — Reinfeld, Fred vs Mccormick Sanchez, Elliot Gael — 1/2-1/2 — Ventnor City
1940 — Bondarevsky, Igor vs Veresov, Gavriil — 1-0 — Moskou ch-URS
1940 — Bondarevsky, Igor vs Veresov, Gavriil — 1-0 — Moscow RUS
1943 — Opocensky, Karel vs Louma, Josef — 1/2-1/2 — Prague CZE
1945 — Opocensky, Karel vs Prucha, Karel — 1-0 — Prague Prague CZE
5…Bb4+ — 12.2% (3114 parties)
1946 — Ragozin, Viacheslav vs Pinkus, Albert — 1-0 — Moscow RUS
1951 — O'Kelly de Galway, Alberic vs Van Seters, Frits — 0-1 — Brussels BEL
1953 — Petrosian, Tigran V. vs Bronstein, David I — 1/2-1/2 — Zurich SUI
1953 — Keres, Paul Petrovich vs Hindre — 1-0 — Tartu EST
1953 — Van Seters, Frits vs Soultanbeieff, Victor — 1-0 — Antwerp BEL