D21j — QGA (1904)
1.d4 d5 2.c4 dxc4 3.Nf3 c5 4.e3 cxd4
Les coups candidats
Ambassadeurs : Afek, Yochanan (15x), Sermek, Drazen (10x), Schalkwijk, Peter H (10x), Kozul, Zdenko (8x), Mikhalchishin, Adrian (7x), Krizsany, Laszlo (6x), Stojanovic, Mih (6x), Polgar, Susan (5x)
5.exd4 — 32.9% (279 parties)
Ambassadeurs : Stavrakakis, Vasilios (11x), Afek, Yochanan (8x), Kallai, Gabor (7x), Krizsany, Laszlo (6x), Nemeth, Zoltan (5x), Fingerov, Dmitry (4x), Kivimaki, Jaakko (4x), Gyimesi, Zoltan (3x)
5.Qxd4 — 9.8% (83 parties)
Ambassadeurs : Vaulin, Alexander P. (3x), Kivimaki, Jaakko (3x), Portisch, Ferenc (2x), Nemeth, Zoltan (2x), Gyimesi, Zoltan (2x), Lengyel, Levente (2x), Turner, Matthew J (2x), Fitzsimons, David (2x)
5.Nxd4 — 1.6% (14 parties)
Ambassadeurs : Sahovic, Dragutin (2x), Stojanovic, Mih (2x), Laustsen, Albert (1x), Haahr, Thorkild (1x), Enetselis, Vasilios (1x), Stavrakakis, Vasilios (1x), Muehlbauer, Martin (1x), Blank, Helmut (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 5.Bxc4 5.exd4 5.Qxd4 5.Nxd4
<1800 26 58% 19% 15% 8%
1800-2200 242 44% 44% 10% 2%
2200-2600 497 60% 29% 10% 1%
2600+ 7 86% — 14% —
Évolution par décennie (% des parties)
Décennie N parties 5.Bxc4 5.exd4 5.Qxd4 5.Nxd4
1950s 5 60% 20% — 20%
1960s 6 17% 67% 17% —
1970s 1 100% — — —
1980s 41 56% 39% 5% —
1990s 182 43% 42% 13% 2%
2000s 304 54% 36% 8% 2%
2010s 214 63% 27% 8% 2%
2020s 96 68% 15% 17% —
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
5.Bxc4 63% 68% ▲ +4.6%
5.exd4 27% 15% ▼ -12.1%
5.Qxd4 8% 17% ▲ +8.3%
5.Nxd4 2% 0% ▼ -1.9%
Parties historiques
5.Bxc4 — 55.5% (471 parties)
1957 — Nielsen, Hartvig vs Haahr, Thorkild — 1/2-1/2 — Odense DEN
1957 — Korning, Peter vs Laustsen, Albert — 1/2-1/2 — ?
1958 — Hansen, Victor Juul vs Haahr, Thorkild — 1/2-1/2 — Herning
1960 — Hamann, Svend vs Haahr, Thorkild — 1-0 — Aalborg DEN
1978 — Saunders, Steve vs Desforges, Jean — 1-0 — D8 corr
5.exd4 — 32.9% (279 parties)
1959 — Wells, Peter J vs Renee Wood — 0-1 — Bognor Regis
1965 — OBrien, Erik Michael vs Blackstone, John — 1-0 — San Jose
1966 — Sommovigo, Elia Giacomo vs Junemann — 1-0 — cr.
1966 — Aegerter, Martin vs Deblois, J. — 1-0 — North Central Open
1968 — Hacker, Christian vs Rathgeber, S. — 1-0 — GER
5.Qxd4 — 9.8% (83 parties)
1967 — Reicher, Emanoil-George vs Partos, Charles — 1/2-1/2 — Bucharest ROU
1984 — Hager, Franz vs Garcia Palermo, Carlos Horacio — 1-0 — Berlin-West
1988 — Kozlov, Vladimir E vs Yermolinsky, Alex — 1/2-1/2 — Frunze KGZ
1990 — Palkovi, Jozsef vs Karolyi, Tibor — 1/2-1/2 — Budapest HUN
1991 — Lako, Laszlo Dr. vs Nemeth, Zoltan — 1/2-1/2 — HUN
5.Nxd4 — 1.6% (14 parties)
1957 — Laustsen, Albert vs Haahr, Thorkild — 0-1 — Denmark ch corr
1993 — Eperjesi, Laszlo Dr. vs Krizsany, Laszlo — 1/2-1/2 — Budapest HUN
1995 — Muehlbauer, Martin vs Blank, Helmut — 0-1 — Bayern
1998 — Enetselis, Vasilios vs Stavrakakis, Vasilios — 0-1 — Thessaloniki, Agiou Dimitriou
2000 — Carvalho, Wagner de Paula vs Borensztajn, David — 1/2-1/2 — Petropolis FIDE-3