E49a - 7…* - Normal Variation, Botvinnik System (1923)

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E49a — Normal Variation, Botvinnik System (1923)
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.a3 Bxc3+ 7.bxc3
Les coups candidats
Ambassadeurs : Milov, Vadim (26x), Sarana, Alexey (22x), Kozak, Adam (15x), Levitt, Jonathan P (13x), Korneva, Marina (12x), Lobanov, Sergei (11x), Hoi, Carsten (9x), Khanin, Semen (9x)
Ambassadeurs : Szabo, Zsolt (8x), Jelen, Igor (6x), Sarana, Alexey (6x), Gerzhoy, Leonid (4x), Hoi, Carsten (3x), Sax, Gyula (3x), Dumitrache, Dragos-Nicolae (3x), Petkov, Ivan V. (3x)
7…b6 — 6.4% (189 parties)
Ambassadeurs : Gulko, Boris (2x), Liutsko, Igor (2x), Mukhit, Aisezym (2x), Gonzalez Ochoa, Yoana (2x), Enevoldsen, Harald (1x), Johansson, Ingi (1x), Benites Quiche Bernard Steven (1x), Forintos, Gyozo V (1x)
7…c6 — 3.6% (106 parties)
Ambassadeurs : Bocharov, Dmitry (5x), Ibragimov, Ildar (3x), Lobanov, Sergei (3x), Bischoff, Klaus (2x), Rausis, Igors (2x), Hou, Yifan (2x), Sokolov, Ivan (2x), Movsesian, Sergei (2x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 7…dxc4 7…c5 7…b6 7…c6
<1800 86 60% 22% 7% —
1800-2200 707 62% 22% 12% 1%
2200-2600 1720 72% 18% 4% 5%
2600+ 185 84% 6% 2% 7%
Évolution par décennie (% des parties)
Décennie N parties 7…dxc4 7…c5 7…b6 7…c6
1950s 69 51% 32% 6% —
1960s 40 42% 40% 10% —
1970s 57 61% 21% 12% —
1980s 88 65% 26% 5% 1%
1990s 283 57% 26% 9% 3%
2000s 360 57% 28% 8% 1%
2010s 577 58% 24% 10% 4%
2020s 1486 79% 12% 4% 5%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
7…dxc4 58% 79% ▲ +20.3%
7…c5 24% 12% ▼ -12.5%
7…b6 10% 4% ▼ -6.5%
7…c6 4% 5% +0.4%
Joueurs célèbres
Champions du monde dans cette position
Botvinnik, Mikhail — 4 parties
Carlsen, Magnus — 3 parties
Gukesh D — 3 parties
Ju, Wenjun — 3 parties
Hou, Yifan — 2 parties
Karpov, Anatoly — 1 partie
Ding, Liren — 1 partie
Anand, Viswanathan — 1 partie
Parties historiques
7…dxc4 — 68.1% (2017 parties)
1950 — Collins Justin vs Cuadrado Pastor, Antonio — 1-0 — corr Wch1
1950 — Chaude de Silans, Chantal vs Keller-Hermann, Edith — 1-0 — Moscow RUS
1950 — Collet, Hugo vs Donner, Jan-Hein — 0-1 — Beverwijk NED
1950 — Collet, Hugo vs Donner, Jan-Hein — 0-1 — Beverwijk NED
1950 — Sanguinetti, Ricardo vs Rossolimo, Nicolas — 0-1 — Mar del Plata ARG
7…c5 — 19.0% (562 parties)
1950 — Parliaros, Dimitrios vs Zografakis, Aristidis — 1-0 — Athens GRE
1950 — Moiseev, Oleg vs Abhinaya Polaka — 1-0 — Tula RUS
1950 — Ilivitsky, Georgy A vs Simagin, Vladimir — 1-0 — Tula RUS
1951 — Schroeder, Ruperto vs Cordaro, J — 1-0 — Santiago de Chile
1952 — Witkowski, Stefan vs Pytlakowski, Andrzej — 0-1 — Katowice POL
7…b6 — 6.4% (189 parties)
1950 — Enevoldsen, Harald vs Johansson, Ingi — 1/2-1/2 — Dubrovnik olm
1950 — Von Baudissin, Georg vs Rinder, Elfriede — 1/2-1/2 — Weidenau
1950 — Porreca, Giorgio vs Napolitano, Mario — 1-0 — Sorrento ch ITA
1957 — Benites Quiche Bernard Steven vs Forintos, Gyozo V — 0-1 — Reykjavik ISL
1965 — Dzindzichashvili, Roman vs Zaitsev, Igor A — 1-0 — Tbilisi GEO
7…c6 — 3.6% (106 parties)
1987 — Rimpineva Eino vs Huttunen, Yrjo — 1/2-1/2 — ?
1990 — Hallila, Erkki vs Ylijoki — 0-1 — corr ch-SF jr
1995 — Ramos Bonilla, Ibsen vs Gareth Ndhiwa — 1-0 — CompuServe email
1996 — Ibragimov, Ildar vs Bischoff, Klaus — 1/2-1/2 — Linares open
1996 — Milov, Vadim vs Rozentalis, Eduardas — 0-1 — Liechtenstein