E15a —
1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3
Les coups candidats
Ambassadeurs : Salzmann, Stefan (164x), Farago, Ivan (159x), Timman, Jan H (146x), Epishin, Vladimir (133x), Karpov, Anatoly (125x), Pérez López, Alberto (117x), Nikolic, Predrag (113x), Van Wely, Loek (108x)
Ambassadeurs : Naumkin, Igor (144x), Popov, Vladimir Valentinovich (94x), Ilyasov, Anatoly Fedorovich (88x), Ivkov, Borislav (78x), Karpov, Anatoly (59x), Mayorau, Mikita (56x), Ribli, Zoltan (47x), Timman, Jan H (45x)
Ambassadeurs : Fedorchuk, Sergey A. (47x), Romanishin, Oleg M (37x), Tiviakov, Sergei (34x), Miles, Anthony J (31x), Liebert, Heinz (29x), Bernal Varela, Nelson (27x), Popov, Vladimir Valentinovich (22x), Rodriguez Cespedes, Amador (19x)
4…c6 — 0.5% (360 parties)
Ambassadeurs : Kovalyov, Anatoly (30x), Tiviakov, Sergei (9x), Ostrovskiy, Andrey (8x), Kovalyov, Anton (7x), Shuvalova, Polina (7x), Vallejo Pons, Francisco (5x), Horvath, Csaba (5x), Samunenkov, Ihor (5x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 4…Ba6 4…Bb7 4…Bb4+ 4…c6
<1800 1140 33% 61% 4% 0%
1800-2200 19591 47% 48% 4% 0%
2200-2600 40776 59% 35% 5% 1%
2600+ 3506 59% 33% 7% 1%
Évolution par décennie (% des parties)
Décennie N parties 4…Ba6 4…Bb7 4…Bb4+ 4…c6
1920s 197 1% 93% 5%
1930s 496 2% 92% 5% 0%
1940s 423 1% 96% 3%
1950s 629 18% 79% 2% 0%
1960s 753 14% 78% 7%
1970s 1472 21% 73% 5% 0%
1980s 4233 52% 41% 6% 0%
1990s 8840 52% 43% 5% 0%
2000s 18928 60% 36% 3% 0%
2010s 30708 52% 42% 5% 1%
2020s 8215 55% 39% 5% 1%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
4…Ba6 52% 55% ▲ +3.7%
4…Bb7 42% 39% ▼ -2.7%
4…Bb4+ 5% 5% -0.3%
4…c6 1% 1% +0.0%
Joueurs célèbres
Champions du monde dans cette position
Alekhine, Alexander — 10 parties
Euwe, Max — 10 parties
Botvinnik, Mikhail — 10 parties
Smyslov, Vladimir — 10 parties
Tal, Mikhail — 10 parties
Karpov, Anatoly — 10 parties
Karpov, Aleksandr — 10 parties
Anand, Viswanathan — 10 parties
Kasparov, Garry — 10 parties
Kramnik, Vladimir — 10 parties
Carlsen, Magnus — 10 parties
Hou, Yifan — 10 parties
Ju, Wenjun — 10 parties
Ding, Liren — 10 parties
Gukesh D — 5 parties
Lasker, Emanuel — 2 parties
Parties historiques
4…Ba6 — 52.2% (39080 parties)
1925 — Gruenfeld, Ernst vs Nimzowitsch, Aaron — 1/2-1/2 — Breslau GER
1930 — Sultan Khan, Mir vs Nimzowitsch, Aron — 0-1 — Liege Belgium
1930 — Fontein, George vs Noteboom, Daniel — 0-1 — Amsterdam NED
1931 — Pirc, Vasja vs Nimzowitsch, Aaron — 1/2-1/2 — Bled SLO
1934 — Stoltz, Gosta vs Nimzowitsch, Aron — 1-0 — Stockholm SWE
4…Bb7 — 42.0% (31479 parties)
1920 — Krenzisky, Simon vs Norman Hansen, Holger — 0-1 — Goteborg SWE
1920 — Tarrasch, Siegbert vs Nimzowitsch, Aron — 1/2-1/2 — Goteborg SWE
1920 — Rubinstein, Akiba vs Bogoljubow, Efim — 0-1 — Goteborg SWE
1921 — Alekhine vs Bogoljubow — 1-0 — Triberg
1921 — Werneck de Castro, Raul vs Grau, Roberto G — 0-1 — Carrasco
4…Bb4+ — 4.5% (3354 parties)
1926 — Thomas, George Alan vs Fallet Kahn, Victor — 1-0 — Scarborough/ North Yorkshire
1926 — Mackenzie, Arthur J vs Alekhine, Alexander — 0-1 — Birmingham ENG
1926 — Mackenzie Jonathan vs Alekhine, Alexander — 0-1 — Birmingham ENG
1926 — Soultanbeieff, Victor vs Lenglez, M. — 1-0 — ESP
1927 — Thomas, George Alan vs Reti, Richard — 1-0 — London ENG
4…c6 — 0.5% (360 parties)
1930 — Landau, Salo vs Takacs, Sandor — 0-1 — Rotterdam NED
1956 — Uhlmann, Wolfgang vs O'Kelly, Albéric de Galway — 1/2-1/2 — Moscow RUS
1972 — Williams, A. Howard vs Tan, Lian Ann — 1-0 — Skopje MKD
1989 — Damljanovic, Branko vs Dizdarevic, Emir — 1-0 — Zenica BIH
1991 — Pavlovic, Dragoljub vs Maksimovic, Branimir — 0-1 — Banja Vrucica BIH