D14b — Exchange
1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.cxd5 cxd5 5.Nc3 Nc6 6.Bf4 Bf5 7.e3
Les coups candidats
Ambassadeurs : Meduna, Eduard (65x), Andersson, Ulf (28x), Nenciulescu, Silviu (25x), Velikov, Petar (25x), Dao, Thien Hai (24x), Popov, Luben (23x), Lukacs, Peter (18x), Rashkovsky, Nukhim N (16x)
Ambassadeurs : Euwe, Max (4x), Vukovic, Sava (3x), Makogonov, Vladimir (3x), Tuzinskiy, Denis (3x), Purdy, Cecil J S (2x), Koshnitsky, Gregory (2x), Kmoch, Hans (2x), Stahlberg, Gideon (2x)
7…Qb6 — 1.7% (146 parties)
Ambassadeurs : Hromadka, Karel (3x), Petrosian, Tigran V. (2x), Aubry Levy, Leonard (2x), Sveshnikov, Evgeny (2x), Vu, Phuong Thao (2x), Le Thanh Tu (2x), Pham, Thi Nu (2x), Stepán, Josef (2x)
7…Rc8 — 0.4% (33 parties)
Ambassadeurs : Tokhirjonova, Gulrukhbegim (3x), Piraud, Louis (1x), PETRO PETROVIC, PINCHUK (1x), Igney, Volkhard (1x), Letmathe, Adolf (1x), Gosciniak, Tomasz (1x), Brozynski, Adam (1x), Rohde, Michael (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 7…e6 7…a6 7…Qb6 7…Rc8
<1800 157 78% 13% 6%
1800-2200 2047 89% 7% 3% 1%
2200-2600 4619 96% 3% 1% 0%
2600+ 273 98% 2% 0%
Évolution par décennie (% des parties)
Décennie N parties 7…e6 7…a6 7…Qb6 7…Rc8
1920s 10 30% 70%
1930s 14 21% 50% 29%
1940s 59 47% 37% 15%
1950s 51 88% 4% 8%
1960s 153 94% 4% 1%
1970s 233 97% 2% 1%
1980s 783 98% 1% 0% 0%
1990s 1488 94% 3% 1% 0%
2000s 2283 91% 6% 2% 0%
2010s 2673 92% 5% 2% 1%
2020s 689 93% 4% 2% 0%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
7…e6 92% 93% ▲ +1.8%
7…a6 5% 4% ▼ -1.4%
7…Qb6 2% 2% +0.0%
7…Rc8 1% 0% -0.2%
Joueurs célèbres
Champions du monde dans cette position
Smyslov, Vladimir — 7 parties
Euwe, Max — 6 parties
Botvinnik, Mikhail — 6 parties
Kramnik, Vladimir — 5 parties
Carlsen, Magnus — 4 parties
Kasparov, Garry — 2 parties
Anand, Viswanathan — 2 parties
Gukesh D — 2 parties
Alekhine, Alexander — 1 partie
Tal, Mikhail — 1 partie
Ju, Wenjun — 1 partie
Parties historiques
7…e6 — 92.3% (7783 parties)
1923 — Marshall, Frank vs Santasiere, Anthony — 1/2-1/2 — Lake Hopatcong
1925 — Asztalos, Lajos vs Kitaeff Mattison, Andres Constantin — 1/2-1/2 — Debrecen HUN
1928 — Anaya Oger, Hector vs Gabarain J — 1-0 — Montevideo ch-URU
1934 — Chekhover, Vitaly vs Veresov, Gavriil — 1-0 — Leningrad ch-URS
1937 — Gudmundsson, Jon Jorundur vs Landau Salomon — 1/2-1/2 — Stockholm SWE
7…a6 — 5.0% (423 parties)
1936 — Gordon, AL. vs Fleming, Ronald Desmond — 1/2-1/2 — Margate ENG
1937 — Purdy, Cecil J S vs Koshnitsky, Gregory — 0-1 — Sydney AUS
1937 — Purdy, Cecil J S vs Koshnitsky, Gregory — 1/2-1/2 — Sydney AUS
1937 — Ebralidze, Arkhil vs Makogonov, Vladimir — 0-1 — Tbilisi GEO
1937 — Ebralidze, Alexandre vs Makogonov, Vladimir — 0-1 — Tbilisi ch-URS
7…Qb6 — 1.7% (146 parties)
1924 — Kier, Aage vs Loewenborg, Otto von — 0-1 — Copenhagen DEN
1925 — Apscheneek, Fricis vs Hromadka, Karel — 1-0 — Bromley
1925 — Voellmy, Erwin vs Hromadka, Karel — 0-1 — Bromley
1926 — Hopman, Pieter vs Jurkowski, Adam — 1-0 — cr.
1926 — Gonzalez May, Daniel Francisco vs Hromadka, Karel — 1-0 — Maehrisch Ostrau
7…Rc8 — 0.4% (33 parties)
1989 — Piraud, Louis vs PETRO PETROVIC, PINCHUK — 0-1 — Parijs open I
1990 — Rohde, Michael vs ? — 1-0 — ?
1992 — Mancebao, M. vs Conde Dominguez, Francisco Manue — 1-0 — cr.
1993 — Meduna, Eduard vs Medunova, Vera — 1-0 — Ceske Budejovice CZE
1998 — Igney, Volkhard vs Letmathe, Adolf — 1/2-1/2 — Weilburg GER