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D14a — Exchange (1928)
1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.cxd5 cxd5 5.Nc3 Nc6 6.Bf4 Bf5
Les coups candidats
Ambassadeurs : Meduna, Eduard (58x), Andersson, Ulf (31x), Nenciulescu, Silviu (27x), Dao, Thien Hai (22x), ? (18x), Velikov, Petar (17x), Heinig, Wolfram, Dr. (15x), Rashkovsky, Nukhim N (15x)
7.Qb3 — 8.2% (704 parties)
Ambassadeurs : Campani, Paolo (7x), Erigaisi Arjun (7x), Alves, Elisa Wisniewki (6x), Carter, Maurice H (5x), Manarin, Franco (5x), Voiculescu, Costel (4x), Ibanez Salazar, Victor Manuel (4x), Clark, Richard I (3x)
7.Rc1 — 1.3% (107 parties)
Ambassadeurs : Voyska, Margarita (3x), Matlak, Marek (2x), Olaizola Ortega, Luis (2x), Bermejo Arruego, Luis (2x), Rantanen, Matti (1x), Muhring, Willem Jan (1x), Biyiasas, Peter (1x), Mednis, Edmar J (1x)
7.a3 — 0.8% (69 parties)
Ambassadeurs : Reyes Cortés, Rafael (4x), Yee, Lorne (2x), Vencl, Radivoje (2x), Plattner, Rolf (2x), Bader, Arnd (1x), Matzat, Andre (1x), Czegledi, Zsolt (1x), Polajzer, Danilo (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 7.e3 7.Qb3 7.Rc1 7.a3
<1800 348 79% 16% 2% 2%
1800-2200 2687 84% 12% 1% 1%
2200-2600 4262 92% 6% 1% 0%
2600+ 225 88% 10% 0% —
Évolution par décennie (% des parties)
Décennie N parties 7.e3 7.Qb3 7.Rc1 7.a3
1950s 53 91% 8% 2% —
1960s 155 97% 3% — —
1970s 224 97% 2% 1% —
1980s 715 97% 1% 1% 0%
1990s 1430 94% 3% 1% 1%
2000s 2246 92% 5% 1% 1%
2010s 2818 84% 12% 2% 1%
2020s 900 75% 20% 2% 1%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
7.e3 84% 75% ▼ -9.0%
7.Qb3 12% 20% ▲ +7.2%
7.Rc1 2% 2% +0.2%
7.a3 1% 1% ▲ +0.5%
Joueurs célèbres
Champions du monde dans cette position
Carlsen, Magnus — 5 parties
Botvinnik, Mikhail — 4 parties
Kramnik, Vladimir — 4 parties
Kasparov, Garry — 2 parties
Gukesh D — 2 parties
Anand, Viswanathan — 1 partie
Parties historiques
7.e3 — 88.8% (7583 parties)
1950 — Chestnov, Vitaliy A. vs Furman, Semyon — 0-1 — Dzintari
1950 — Benko, Pal vs Szabo, Laszlo — 0-1 — Budapest HUN
1950 — Molnar, Istvan vs Kluger, Gyula — 1-0 — Budapest HUN
1950 — Kottnauer, Cenek vs Rossolimo, Nicolas — 1/2-1/2 — Amsterdam NED
1950 — Al Husari, Zita Fatima vs Kottnauer, Cenek — 1/2-1/2 — Schiavno Zdroj
7.Qb3 — 8.2% (704 parties)
1954 — Keres, Paul Petrovich vs Smyslov, Vasily — 1/2-1/2 — Hastings ENG
1954 — Geller, Sandor vs Henderson, Callum — 1-0 — Los Angeles, CA USA
1958 — GIDEON SUNDAY vs Szabo, Laszlo — 1/2-1/2 — Munich GER
1959 — Fazekas, Stephan vs Kol J W A van — 1-0 — ?
1967 — Kuzmin, Gennadi vs Kots, Yuri I — 1/2-1/2 — ?
7.Rc1 — 1.3% (107 parties)
1956 — Rantanen, Matti vs Muhring, Willem Jan — 1/2-1/2 — Moscow olm fin-B
1970 — Dobrovolsky, Ladislav vs Skacel, Bohuslav — 1/2-1/2 — Harrachov
1973 — Jacobsen, Bo vs Larsen, Bent — 1/2-1/2 — Nordic ch Grenaa (DK
1977 — Biyiasas, Peter vs Mednis, Edmar J — 1/2-1/2 — New York, NY USA
1984 — Matlak, Marek vs Hernandez Gonzalez, Albert Josue — 1-0 — Kiljava
7.a3 — 0.8% (69 parties)
1986 — Czegledi, Zsolt vs Polajzer, Danilo — 1/2-1/2 — ?
1989 — Bader, Arnd vs Matzat, Andre — 0-1 — Porz op22 Porz GER
1992 — Javier Wahome vs Caso Pardo, Andres — 0-1 — Asturias
1993 — Mantzouneas, Nikolaos vs Kasueschke, Gregor — 0-1 — Wch Seniors Bad Wildbad GER
1994 — Kielgast, Ottomar vs Andersen, Uwe — 1/2-1/2 — Schwabstedt