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D20t — QGA (1961)
1.d4 d5 2.c4 dxc4 3.e4 c5 4.d5
Les coups candidats
4…Nf6 — 57.2% (584 parties)
Ambassadeurs : Spangenberg, Hugo (12x), Szakolczai, Peter (8x), Polgar, Susan (7x), Peric, Slavisa (7x), Beliavsky, Alexander G (7x), Firouzja, Alireza (7x), Nakamura, Hikaru (7x), Ehlvest, Jaan (6x)
4…e6 — 38.0% (388 parties)
Ambassadeurs : Afek, Yochanan (20x), Gyimesi, Zoltan (16x), Lev, Ronen (14x), Cifuentes Parada, Roberto (9x), Krizsany, Laszlo (7x), Polgar, Susan (6x), Heinbuch, Detlef Ulrich (6x), Ibragimov, Ildar (5x)
4…b5 — 3.0% (31 parties)
Ambassadeurs : Tiitta, Sauli (6x), Laine, Heikki (2x), Krupkova, Petra (2x), Dudas, Janos (2x), Loeffler, Stefan (1x), Efimov, Igor (1x), Timoscenko, Gennadij (1x), Dudas, Jan (1x)
4…e5 — 0.8% (8 parties)
Ambassadeurs : Schneiders, Albert (1x), De Francisci, Lorenzo (1x), Claus, Simon Martin (1x), Metzing, Joachim (1x), Krause, Fabian (1x), Liu, Yi-Nan Julian (1x), Jerez, Miriam (1x), Martinez, Silvio (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 4…Nf6 4…e6 4…b5 4…e5
<1800 46 63% 20% 11% 2%
1800-2200 247 63% 32% 2% 1%
2200-2600 557 57% 39% 3% 1%
2600+ 39 87% 13%
Évolution par décennie (% des parties)
Décennie N parties 4…Nf6 4…e6 4…b5 4…e5
1950s 1 100%
1960s 9 44% 56%
1970s 19 53% 42%
1980s 61 39% 59% 2%
1990s 370 49% 45% 5%
2000s 275 62% 33% 3% 2%
2010s 195 64% 31% 2% 2%
2020s 91 74% 22%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
4…Nf6 64% 74% ▲ +9.5%
4…e6 31% 22% ▼ -9.3%
4…b5 2% 0% ▼ -2.1%
4…e5 2% 0% ▼ -1.5%
Joueurs célèbres
Champions du monde dans cette position
Karpov, Anatoly — 3 parties
Anand, Viswanathan — 3 parties
Kasparov, Garry — 2 parties
Kramnik, Vladimir — 1 partie
Carlsen, Magnus — 1 partie
Ju, Wenjun — 1 partie
Parties historiques
4…Nf6 — 57.2% (584 parties)
1956 — Nei, Iivo vs Arulaid, Alexander — 1-0 — Tallinn EST
1961 — Buslaev, Aleksander vs Roizman, Michael — 1/2-1/2 — Batumi GEO
1961 — Ghitescu, Theodor vs Filip, Miroslav — 1/2-1/2 — Marianske Lazne zt
1968 — Furman, Semyon vs Birkan, Elif Rana — 1-0 — USSR
1968 — Kopecek, Ivan vs Nemec, Anton — 1/2-1/2 — Brno KOLT Brno CZE
4…e6 — 38.0% (388 parties)
1961 — Keres, Paul Petrovich vs Johansson, Martin 1979 — 1/2-1/2 — Stockholm Stockholm SWE
1964 — Veresov, Gavriil vs Neishtadt, Yakov — 1-0 — Moscow RUS
1967 — Weaver, Norris vs Sloan, Sam — 1-0 — San Francisco, CA USA
1969 — Vukic, Milan vs Zinn, Lothar — 1-0 — Zinnowitz GER
1969 — Espig, Lutz vs Knaak, Rainer — 1/2-1/2 — Zinnowitz GER
4…b5 — 3.0% (31 parties)
1988 — Loeffler, Stefan vs Efimov, Igor — 0-1 — Hradec Kralove CZE
1990 — Plaskett, H James vs Ray, Chris A — 1-0 — London ENG
1990 — Arencibia Rodriguez, Walter vs Dao, Thien Hai — 1/2-1/2 — Novi Sad olm
1991 — Stoisavljevic, Sava vs Vujic-Katanic, Branka — 0-1 — Kladovo
1992 — Kincs, Imre vs Gudat, Alfons — 0-1 — ?
4…e5 — 0.8% (8 parties)
2000 — Claus, Simon Martin vs Metzing, Joachim — 1-0 — Griesheim
2002 — Schneiders, Albert vs De Francisci, Lorenzo — 1-0 — Cocquio-Trevisago ITA
2004 — Krause, Fabian vs Liu, Yi-Nan Julian — 0-1 — Wolfsberg
2008 — Jerez, Miriam vs Martinez, Silvio — 1-0 — FICGS
2008 — Pflantz, Mike vs Sarbok, Torsten — 1/2-1/2 — GER