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A43b —
1.d4 c5 2.dxc5
Eval: [+0.20]
Les coups candidats
2…e6 — 50.0% (1273 parties)
Ambassadeurs : Rossi, Giampiero (5x), Szilagyi, Gyorgy Laszlo (4x), Matnadze Bujiashvili, Ann (4x), Bass Stanley (4x), Zelcic, Robert (4x), Slajs, Vlastimil (4x), Kurajica, Bojan (4x), Horák, Jaroslav (4x)
2…Nf6 — 16.3% (415 parties)
Ambassadeurs : bekerschaak (27x), Gulrik (24x), Gnasher (19x), trebbor (16x), checy (9x), Karkulin (9x), thecowboy (7x), ? (6x)
2…Qa5+ — 12.9% (328 parties)
Ambassadeurs : Hansen, Torben (6x), Karpoff, Kari (5x), Velickovic, Sasa (5x), Jernberg, Karl-Petter (4x), Klett, Harald (3x), Grawe, Herbert (3x), Castro Smith, Javier Antonio (3x), Costin Gantea, Alex (2x)
2…Na6 — 11.2% (286 parties)
Ambassadeurs : Reddmann, Hauke, Dr. (5x), Bogdan, Dan (3x), Kunsztowicz, Uwe (2x), Schammo, Jean (2x), Sulava, Nenad (2x), Dumitrescu, Dragos-Nicolae (2x), Fischer, Johann (2x), Sikorova, Olga (2x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 2…e6 2…Nf6 2…Qa5+ 2…Na6
<1800 103 46% 5% 20% 8%
1800-2200 895 59% 4% 15% 12%
2200-2600 613 61% 4% 11% 21%
2600+ 2 50% 50%
Évolution par décennie (% des parties)
Décennie N parties 2…e6 2…Nf6 2…Qa5+ 2…Na6
1900s 4 75%
1910s 2 50% 50%
1920s 3 33% 67%
1930s 9 78% 11% 11%
1940s 3 100%
1950s 7 57% 29%
1960s 21 81% 5% 14%
1970s 28 57% 11% 18% 11%
1980s 80 69% 4% 15% 10%
1990s 488 51% 5% 15% 19%
2000s 1062 45% 27% 11% 8%
2010s 736 53% 12% 14% 10%
2020s 104 49% 7% 13% 12%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
2…e6 53% 49% ▼ -4.1%
2…Nf6 12% 7% ▼ -5.8%
2…Qa5+ 14% 13% -0.4%
2…Na6 10% 12% ▲ +2.4%
Parties historiques
2…e6 — 50.0% (1273 parties)
1906 — Suechting, Hugo vs Blackburne, Joseph — 0-1 — Ostende
1907 — Kelly, Thomas J vs Blackburne, Joseph — 0-1 — Crystal Palace
1909 — Marshall, Frank vs Blackburne, Joseph — 1-0 — England
1913 — Důras, Oldřich vs Grommer — 1-0 — New York, NY USA
1925 — Yates, Bertram A. vs Enke, Max — 1-0 — Vancouver
2…Nf6 — 16.3% (415 parties)
1978 — Windt, Lothar vs Andersen, Jens Knud — 1-0 — Hamburg GER
1979 — Bauza Mercere, Eduardo vs Steinbaum, Fernando — 0-1 — Mar del Plata op-12
1979 — Krueger, Erich vs Backwinkel, Paul — 1/2-1/2 — Bochum GER
1981 — ? vs Ioseliani, Nana — 1-0 — Tbilisi GEO
1983 — Airey, E. vs Sommerfeld, Gilbert — 0-1 — Moose Jaw CAN
2…Qa5+ — 12.9% (328 parties)
1914 — Krause, Christian vs Costin Gantea, Alex — 1-0 — corr
1924 — Thoms, Henry James Macthom vs Wilkinson, F. — 1-0 — Southport ENG
1928 — Vianna Neto, Levy Freire vs Mamani Montalban, Joaquin Andre — 0-1 — Mar del Plata ARG
1938 — Kraus, Ferdynand vs Costin Gantea, Alex — 1-0 — Switzerland
1950 — Haefner Erich vs Werner, Stephan — 0-1 — Bielefeld
2…Na6 — 11.2% (286 parties)
1934 — Rejfir, Josef vs Drezga, Tihomil — 1-0 — Maribor
1962 — Csulits, Anton vs Muehlberg, Siegfried — 1/2-1/2 — GDR-ch Gera GER
1965 — Brameyer, Hermann vs Bruentrup, Dieter — 1/2-1/2 — Annaberg-Buchholz GER
1967 — Jimenez Zerquera, Eleazar vs Calvo José Minguez, Ricardo — 1/2-1/2 — Palma de Majorca ESP
1978 — Windt, Lothar vs Wille, Winfried — 1/2-1/2 — Hamburg GER