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E04a — Open Defense (1947)
1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Nf3
Les coups candidats
Ambassadeurs : Allawi Rawlings (40x), Sveshnikov, Evgeny (34x), Deforel, Jorge Eduardo (32x), Dorer, Manfred (29x), Pérez López, Alberto (26x), Salzmann, Stefan (25x), Novikov, Igor (22x), Beliavsky, Alexander G (20x)
Ambassadeurs : Aleksandrov, Viktor A. (34x), Gleizerov, Evgeny (18x), Wojtkiewicz, Aleksander (17x), Luther, Thomas (15x), Langer, Raimund (15x), Raetsky, Alexander (14x), Sage, François (13x), Beliavsky, Alexander G (13x)
Ambassadeurs : Lu, Shanglei (40x), Sokolov, Andrei (35x), Inkiov, Ventzislav (21x), Smagin, Sergey (12x), Postny, Evgeny (12x), Razuvaev, Yuri S (11x), Stukalov, Mikhail Vasilievich (11x), Van der Wiel, John T.H. (11x)
Ambassadeurs : Landa, Konstantin (14x), Probola, Ryszard (12x), Michenka, Jozef (11x), Ilincic, Zlatko (11x), Kovacevic, Vlatko (10x), Brunello, Sabino (10x), Allawi Rawlings (9x), Bourgoin, Claude (9x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 5…a6 5…Nc6 5…c5 5…Bb4+
<1800 908 30% 20% 19% 11%
1800-2200 8620 33% 22% 16% 12%
2200-2600 14806 33% 22% 14% 13%
2600+ 1138 24% 17% 28% 15%
Évolution par décennie (% des parties)
Décennie N parties 5…a6 5…Nc6 5…c5 5…Bb4+
1950s 86 16% 2% 42% 7%
1960s 52 17% 4% 25% 10%
1970s 193 32% 3% 16% 10%
1980s 990 26% 6% 34% 4%
1990s 1701 19% 29% 21% 4%
2000s 4461 31% 30% 16% 8%
2010s 12490 35% 23% 13% 14%
2020s 7094 31% 13% 18% 17%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
5…a6 35% 31% ▼ -4.0%
5…Nc6 23% 13% ▼ -9.5%
5…c5 13% 18% ▲ +4.9%
5…Bb4+ 14% 17% ▲ +2.9%
Joueurs célèbres
Champions du monde dans cette position
Karpov, Anatoly — 10 parties
Anand, Viswanathan — 10 parties
Kramnik, Vladimir — 10 parties
Carlsen, Magnus — 10 parties
Ju, Wenjun — 10 parties
Hou, Yifan — 10 parties
Gukesh D — 10 parties
Kasparov, Garry — 8 parties
Ding, Liren — 7 parties
Tal, Mikhail — 4 parties
Smyslov, Vladimir — 1 partie
Botvinnik, Mikhail — 1 partie
Parties historiques
5…a6 — 31.9% (8634 parties)
1951 — Gereben, Erno vs Pogats, Jozsef Jr. — 1-0 — Hungary ch
1951 — Golombek, Harry vs Eken, Max — 1-0 — Paignton
1951 — Donner, Jan-Hein vs Gligorić, Svetozar — 1/2-1/2 — Birmingham Birmingham ENG
1952 — Platz, Hans vs Zenker, Lothar — 1-0 — Binz GER
1952 — Konstantinopolsky, Alexander vs Ravinsky, Grigory — 1-0 — Odessa UKR
5…Nc6 — 21.2% (5732 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 ch
1971 — Bukic, Enver vs Cvetkovic, Srdjan — 0-1 — Portoroz SLO
5…c5 — 16.1% (4348 parties)
1950 — Milev, Zdravko vs Neikirkh, Oleg — 1/2-1/2 — Sofia BUL
1950 — Golombek, Harry vs Unzicker, Ferdinand, Dr. — 1/2-1/2 — Hastings ENG
1950 — Alatortsev, Vladimir N. vs Flohr, Salo — 1/2-1/2 — Moscow RUS
1950 — Barda, Olaf vs Watzal, Dennis — 1-0 — corr Wch1
1950 — Ravinsky, Grigory vs Zagoriansky, Evgeny — 1/2-1/2 — Moscow RUS
5…Bb4+ — 12.6% (3411 parties)
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, Heino — 1-0 — Tartu EST
1953 — Van Seters, Frits vs Soultanbeieff, Victor — 1-0 — Antwerp BEL
1957 — Gimeno Patino, Tomas vs Rodriguez Garcia, Jesus — 1-0 — Zaragoza