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D20j — QGA (1908)
1.d4 d5 2.c4 dxc4 3.Nc3 e6 4.e4
Les coups candidats
4…c5 — 27.0% (217 parties)
Ambassadeurs : Baron Rodriguez, Jesus (5x), Lu, Shanglei (3x), Jurcik, Martin (3x), Solys, Laimutis (3x), Tiitta, Sauli (2x), Dudas, Janos (2x), Kiselev, Gennady (2x), Dang The Nam (2x)
4…Nf6 — 21.8% (175 parties)
Ambassadeurs : Kantyshev, Nikita (3x), Davis Wanjala (1x), Visser, Wim (1x), D'Haens, Charles (1x), Frauenfelder, Ernest (1x), Hatch, E. (1x), Yudacufski, N. (1x), Basoukos, I. (1x)
4…Bb4 — 15.5% (125 parties)
Ambassadeurs : Jonkman, Harmen (2x), Jokmin, Alex (2x), Davidson, Eric (2x), Carlsson, Goran (1x), Svedenklint, Stig (1x), Zielke, Bernd (1x), Kluver, Horst (1x), Nohle (1x)
4…Nc6 — 12.7% (102 parties)
Ambassadeurs : Pasquotto, Mirko (2x), Urban, Vlastimil (2x), Sun, Chao (1x), Sathwick G Che (1x), Klawonn, Malin (1x), Geiskert, M. (1x), Wolf, Andre (1x), Chand, Tilak Bahadur (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 4…c5 4…Nf6 4…Bb4 4…Nc6
<1800 103 17% 25% 28% 12%
1800-2200 221 32% 29% 7% 10%
2200-2600 135 62% 12% 1% —
2600+ 10 90% — 10% —
Évolution par décennie (% des parties)
Décennie N parties 4…c5 4…Nf6 4…Bb4 4…Nc6
1950s 3 33% — — —
1960s 5 40% 20% — —
1970s 7 — 29% 29% 14%
1980s 14 36% 7% 21% —
1990s 163 22% 26% 15% 13%
2000s 315 23% 23% 18% 16%
2010s 210 27% 19% 17% 12%
2020s 87 52% 17% 5% 5%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
4…c5 27% 52% ▲ +24.6%
4…Nf6 19% 17% ▼ -1.8%
4…Bb4 17% 5% ▼ -12.5%
4…Nc6 12% 5% ▼ -7.3%
Parties historiques
4…c5 — 27.0% (217 parties)
1957 — Botez, Constantin vs Tseveloidoff — 1-0 — Reykjavik ISL
1962 — Sliwa, Bogdan vs Drozd, Ryszard — 1-0 — Poznan ch POL
1965 — Schinzel, Wladyslaw vs Manasterski, Lutoslaw — 1-0 — Lublin POL
1980 — Gaberg, S. vs Nikolic, Zivoslav — 0-1 — corr Yugoslavia
1980 — Nielsen, Jan Mose vs Sandahl, Jan — 1-0 — Brondby
4…Nf6 — 21.8% (175 parties)
1969 — Davis Wanjala vs Visser, Wim — 1-0 — ?
1972 — D'Haens, Charles vs Frauenfelder, Ernest — 0-1 — Pula CRO
1972 — Hatch, E. vs Yudacufski, N. — 1-0 — Berkeley
1980 — Basoukos, I. vs Zahilas, Loukas N. — 0-1 — ?
1992 — Berndorff, Beatrix vs Andersson, Christin — 1/2-1/2 — Hradec Kralove ch-EU
4…Bb4 — 15.5% (125 parties)
1978 — Wirtz, Bernhard vs Zrowothke, V — 1-0 — GER
1978 — Chin, Foo Yik vs Aksoy, Talha Esat — 1-0 — Buenos Aires ARG
1984 — Nohle vs Coil — 1-0 — Cincinnati
1987 — Carlsson, Goran vs Svedenklint, Stig — 1-0 — Jonkoping
1988 — Zielke, Bernd vs Kluver, Horst — 0-1 — Landes-Einzelmeister
4…Nc6 — 12.7% (102 parties)
1973 — Sun, Chao vs Sathwick G Che — 1-0 — ACM Atlanta
1992 — Fernschild, Bernd vs Fleck, Norbert — 1-0 — GER
1992 — Rehberg, Anja vs Wenke, Petra — 1/2-1/2 — GER
1993 — Ulburghs, Piet vs Cuyvers, Lucien — 1-0 — Lommel
1994 — James Russell Demyer vs Carpenter, Stephen C D — 0-1 — Grand Rapids ch-MI amateu