D14b - 7.e3 - Exchange (1927)

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D14b — Exchange (1927)
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), Hector, Jonny (34x), Andersson, Ulf (31x), Nenciulescu, Silviu (25x), Velikov, Petar (23x), Dao, Thien Hai (21x), ? (18x), Lukacs, Peter (17x)
Ambassadeurs : Jahn, Constanze (3x), Erdelyi, Tamas Dr (3x), Zecha, Gerhard Dr (2x), Jahr, Ulrich (2x), Kaczorowska, Barbara (2x), Dudas, Janos (2x), Fischer, Ernst (2x), Gaertner, Guntram (2x)
7…Qb6 — 1.5% (132 parties)
Ambassadeurs : Sveshnikov, Evgeny (2x), Vu, Phuong Thao (2x), Le Thanh Tu (2x), Necesany, Zdenek (1x), Fichtl, Jiri (1x), Benko, Pal (1x), Szabo, Laszlo (1x), Molnar, Istvan (1x)
7…Rc8 — 0.4% (33 parties)
Ambassadeurs : Piraud, Louis (1x), Petrovic, Patrik (1x), Mancebao, M. (1x), Conde Fisas, Claudia (1x), Igney, Volkhard (1x), Letmathe, Adolf (1x), Gosciniak, Tomasz (1x), Brozynski, Adam (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 319 82% 11% 5% 0%
1800-2200 2560 89% 7% 3% 1%
2200-2600 4470 96% 3% 1% 0%
2600+ 238 97% 2% — 0%
Évolution par décennie (% des parties)
Décennie N parties 7…e6 7…a6 7…Qb6 7…Rc8
1950s 51 88% 4% 8% —
1960s 155 94% 4% 1% —
1970s 236 97% 2% 1% —
1980s 787 98% 1% 0% 0%
1990s 1502 94% 3% 1% 0%
2000s 2281 91% 6% 2% 0%
2010s 2699 92% 6% 2% 1%
2020s 873 93% 5% 2% 0%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
7…e6 92% 93% ▲ +1.0%
7…a6 6% 5% ▼ -0.9%
7…Qb6 2% 2% +0.2%
7…Rc8 1% 0% -0.3%
Joueurs célèbres
Champions du monde dans cette position
Kramnik, Vladimir — 6 parties
Botvinnik, Mikhail — 4 parties
Carlsen, Magnus — 4 parties
Kasparov, Garry — 2 parties
Anand, Viswanathan — 2 parties
Gukesh D — 2 parties
Ju, Wenjun — 1 partie
Parties historiques
7…e6 — 92.7% (7957 parties)
1950 — Chestnov, Vitaliy A. vs Furman, Semyon — 0-1 — Dzintari
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
1950 — Rethy, Pal vs Pogats, Jozsef Jr. — 0-1 — Budapest HUN
1950 — Morcken, Otto B vs Letelier Martner, Rene — 0-1 — Dubrovnik olm
7…a6 — 4.8% (410 parties)
1951 — Westbrock, C. vs Cross, James — 0-1 — Forth Worth
1953 — O'Kelly, Albéric de Galway vs Eken, Max — 1/2-1/2 — Beverwijk NED
1964 — Mendel G vs Zecha, Gerhard Dr — 0-1 — cr.
1967 — Navarovszky, Laszlo vs Jahr, Ulrich — 1/2-1/2 — Reggio Emilia ITA
1967 — Trincardi, Tullio vs Jahr, Ulrich — 0-1 — Reggio Emilia ITA
7…Qb6 — 1.5% (132 parties)
1950 — Benko, Pal vs Szabo, Laszlo — 0-1 — Budapest HUN
1950 — Molnar, Istvan vs Kluger, Gyula — 1-0 — Budapest HUN
1953 — Golz, Werner vs Baumbach, Friedrich, Dr. — 1/2-1/2 — Brandenburg/Havel
1956 — Necesany, Zdenek vs Fichtl, Jiri — 0-1 — CSR-ch sf Bratislava SVK
1961 — Minaya, Juan vs Gilden, Lawrence — 0-1 — The Hague NED
7…Rc8 — 0.4% (33 parties)
1989 — Piraud, Louis vs Petrovic, Patrik — 0-1 — Parijs open I
1990 — Rohde, Michael vs ? — 1-0 — ?
1992 — Mancebao, M. vs Conde Fisas, Claudia — 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