B21a — McDonnell Attack (1955)
1.e4 c5 2.f4
Les coups candidats
Ambassadeurs : Villing, Dieter (28x), Bisguier, Arthur B (20x), Day, Lawrence A. (20x), Langner, Ladislav (20x), Sveshnikov, Evgeny (19x), Krol, Wladyslaw (19x), Mas, Hafizulhelmi (18x), Hebden, Mark L (14x)
Ambassadeurs : Krol, Wladyslaw (123x), Kadonas, Kestutis (48x), Van Daatselaar, Jan Bart (33x), Pintor, Manuel Abranches (31x), Mas, Hafizulhelmi (23x), Sveshnikov, Evgeny (22x), Keber, Ernst (22x), Hebden, Mark L (21x)
Ambassadeurs : Krol, Wladyslaw (30x), Hebden, Mark L (21x), Hodgson, Julian M (20x), Kadonas, Kestutis (19x), Poletaev, Vitaly Avenirovich (17x), Westerinen, Heikki M.J. (15x), Sikora-Lerch, Jan (15x), Day, Lawrence A. (13x)
Ambassadeurs : Vann, Monica S (14x), Roos, Karin (10x), Kadonas, Kestutis (10x), Wall, Bill (8x), Montoro, Gustavo E. (7x), Horn, Pascal (6x), Odonnell, Kieran C (5x), Gaciu, Vlad-Jan (5x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 2…Nc6 2…d5 2…e6 2…d6
<1800 2671 28% 27% 18% 17%
1800-2200 10608 29% 31% 16% 11%
2200-2600 4354 28% 35% 18% 4%
2600+ 20 5% 60% 20%
Évolution par décennie (% des parties)
Décennie N parties 2…Nc6 2…d5 2…e6 2…d6
1950s 67 42% 7% 10% 21%
1960s 282 38% 5% 26% 10%
1970s 628 38% 5% 28% 12%
1980s 1715 31% 21% 23% 8%
1990s 5218 31% 28% 16% 13%
2000s 8115 28% 30% 17% 12%
2010s 6165 28% 33% 16% 11%
2020s 1133 24% 42% 15% 9%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
2…Nc6 28% 24% ▼ -4.0%
2…d5 33% 42% ▲ +9.0%
2…e6 16% 15% ▼ -0.7%
2…d6 11% 9% ▼ -1.8%
Joueurs célèbres
Champions du monde dans cette position
Kramnik, Vladimir — 10 parties
Botvinnik, Mikhail — 3 parties
Tal, Mikhail — 3 parties
Kasparov, Garry — 3 parties
Anand, Viswanathan — 1 partie
Carlsen, Magnus — 1 partie
Gukesh D — 1 partie
Hou, Yifan — 1 partie
Parties historiques
2…Nc6 — 29.3% (6842 parties)
1951 — Rico, Amina vs Toran Albero, Roman — 0-1 — Gijon
1951 — Rico Gonzalez, Antonio vs Toran Albero, Roman — 0-1 — Gijon
1951 — Yerhoff, Frank vs Fox, Alan — 1/2-1/2 — Vancouver
1951 — Bohatyrchuk, Fedir Parfenovych vs Yanofsky, Daniel Abraham — 1-0 — Canada
1951 — Bohatyrchuk, Fedir Parfenovych vs Holowach, Walter — 1/2-1/2 — Vancouver
2…d5 — 29.0% (6759 parties)
1954 — Bohatyrchuk, Fedir Parfenovych vs Sajtar, Jaroslav — 1/2-1/2 — Amsterdam olm
1955 — Atnikov, Frank vs Jursevskis, Miervaldis — 1/2-1/2 — Vancouver
1957 — Partyka, Kazimierz vs Benko, Pal — 1/2-1/2 — Dublin zt
1957 — Carter III, William G vs Hendricks, Benjamin — 0-1 — San Quentin, CA
1959 — Szobi, Tibor vs Baranyi, Gyorgy — 1-0 — Zalaegerszeg
2…e6 — 17.2% (4015 parties)
1951 — Zamora Lima, Hazael vs Letelier Martner, Rene — 0-1 — ?
1951 — Jackson, John Alexander vs Olafsson, Fridrik — 0-1 — Birmingham/Coventry
1951 — Canepa, Jose vs Eliskases, Erich — 0-1 — San Rafael
1954 — Nielsen, E Verner vs Conrad, Norman — 1-0 — Copenhagen DEN
1957 — Correa, Hilton vs Wade, Robert G — 0-1 — Plymouth
2…d6 — 11.6% (2714 parties)
1950 — Deppe, Georg vs Stappenbeck, Heinz — 1-0 — Detmold
1950 — Gordon, Morris vs Solana, Robert — 0-1 — Los Angeles, CA USA
1951 — Leinweber, Martina vs Paoli, Alessio Matteo — 0-1 — Venice ITA
1951 — Juarez, Carlos Eleodoro vs Casas Perea, Fernando — 1-0 — Buenos Aires ARG
1953 — Belkadi, Ridha vs Bidjarano, Sami — 0-1 — Paris FRA