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B23a — Closed (1921)
1.e4 c5 2.Nc3
Les coups candidats
Ambassadeurs : Mitkov, Nikola (132x), ? (129x), Rogulj, Branko (112x), Starostits, Ilmars (98x), Bastian, Herbert (93x), Hort, Vlastimil (87x), Jansa, Vlastimil (68x), Blatny, Frantisek (67x)
Ambassadeurs : Nekhaev, Andrey Ivanovich (59x), ? (52x), Mitkov, Nikola (47x), Gelfand, Boris (42x), Gutman, Lev (41x), Sammalvuo, Tapani (26x), Gdanski, Jacek (26x), Clares Huanca, Danner Saed (24x)
Ambassadeurs : Mitkov, Nikola (67x), ? (44x), Balashov, Yuri (33x), Bastian, Herbert (31x), Espig, Lutz (29x), Suetin, Alexey S (20x), Spraggett, Kevin (19x), Hebden, Mark L (18x)
2…a6 — 5.6% (12439 parties)
Ambassadeurs : Vehi Bach, Victor Manuel (27x), Lyell, Mark (23x), Ghaem Maghami, Ehsan (22x), Mitkov, Nikola (20x), Doluhanova, Evgeniya (18x), Deus Filho, Joaquim de (14x), Starostits, Ilmars (12x), Macieja, Bartlomiej (10x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 2…Nc6 2…d6 2…e6 2…a6
<1800 19838 53% 19% 16% 6%
1800-2200 105576 60% 14% 15% 6%
2200-2600 65629 59% 15% 15% 7%
2600+ 1418 38% 35% 17% 8%
Évolution par décennie (% des parties)
Décennie N parties 2…Nc6 2…d6 2…e6 2…a6
1950s 797 79% 11% 4% 2%
1960s 2138 78% 10% 7% 1%
1970s 3634 66% 16% 15% 1%
1980s 6746 67% 14% 16% 1%
1990s 37073 67% 14% 15% 2%
2000s 70883 62% 15% 15% 4%
2010s 74714 54% 17% 15% 8%
2020s 27720 51% 19% 15% 9%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
2…Nc6 54% 51% ▼ -3.2%
2…d6 17% 19% ▲ +2.3%
2…e6 15% 15% +0.2%
2…a6 8% 9% ▲ +0.7%
Joueurs célèbres
Champions du monde dans cette position
Tal, Mikhail — 10 parties
Karpov, Anatoly — 10 parties
Smyslov, Vladimir — 10 parties
Anand, Viswanathan — 10 parties
Kasparov, Garry — 10 parties
Kramnik, Vladimir — 10 parties
Carlsen, Magnus — 10 parties
Ju, Wenjun — 10 parties
Hou, Yifan — 10 parties
Gukesh D — 10 parties
Botvinnik, Mikhail — 8 parties
Karpov, Aleksandr — 4 parties
Ding, Liren — 4 parties
Smyslov, Vassily — 1 partie
Parties historiques
2…Nc6 — 59.3% (132581 parties)
1950 — Karacsonyi, Laszlo vs Soos, Bela — 1-0 — Marosvasarhely
1950 — Poulsen, Christian vs Rapaka Samuel Paul — 0-1 — Dubrovnik olm
1950 — Afizov, Marsel vs Hejduk, Jakub — 0-1 — Chocen
1950 — Bykova, Elizaveta vs Karff, Mona M — 1-0 — Moscow RUS
1950 — Sinclair, Don vs Holowach, Walter — 0-1 — Edmonton CAN
2…d6 — 15.7% (35133 parties)
1950 — Bykova, Elizaveta vs Mora, Maria Teresa — 1/2-1/2 — Moscow RUS
1950 — Kauder, Hartmut vs Mueller, Claus — 1/2-1/2 — Soemmerda ch GDR
1950 — Palda, Karl vs Pinzon Solis, Felipe — 1/2-1/2 — Dubrovnik olm
1950 — Henneberger, Walter vs Van Mol, Yves — 1-0 — Switzerland
1950 — Rapaka Samuel Paul vs Dygert, Bert — 0-1 — Springfield,MA simul
2…e6 — 14.9% (33290 parties)
1950 — Balogh, Janos vs Benko, Pal — 0-1 — Budapest HUN
1950 — Ivkov, Borislav vs Pilnik, Herman — 1-0 — Bled SLO
1950 — Bykova, Elizaveta vs Keller-Hermann, Edith — 1-0 — Moscow RUS
1950 — Palda, Karl vs Kupferstich, Moises — 1/2-1/2 — Dubrovnik olm
1951 — Smyslov, Vasily vs Kotov, Alexander — 1/2-1/2 — Moskou ch-URS
2…a6 — 5.6% (12439 parties)
1951 — Aabel Thomas Eapen vs Donner, Jan-Hein — 1-0 — Hastings ENG
1954 — Eretova, Kveta vs Wojcik, X — 0-1 — Moscow SU-CS w
1954 — Engert, Immo vs Hantke, Rolf — 1-0 — Bad Salzuflen
1955 — Beni, Alfred vs Prins, Laura — 1-0 — Hamburg GER
1955 — Engert, Immo vs Mross, Paul — 0-1 — Hoechst ch-GER