E03l - 6…c5 7.Nf3 a6 8.Qc2 - Open (1943)

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E03l — Open
1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Qa4+ Nbd7 6.Qxc4 c5 7.Nf3 a6 8.Qc2
Les coups candidats
8…b6 — 35.4% (132 parties)
Ambassadeurs : Akopov, Roman (4x), Gebhardt, Ulrich, Dr. (4x), Tyleek, Drahomír (4x), Andersson, Ulf (3x), Naiditsch, Arkadij (3x), Johnston, Allan (3x), Jenneborg, Seved (3x), Fuchs, Reinhart (2x)
8…b5 — 32.2% (120 parties)
Ambassadeurs : Galjé, Hans (5x), Chronopoulos, Antonios (5x), Aberbach Peltzman, Angel (5x), Kazmierski, Tomasz (5x), Gebhardt, Ulrich, Dr. (4x), Korchnoi, Viktor (3x), Schneider, Lars-Ake (3x), Tyleek, Drahomír (3x)
8…cxd4 — 17.7% (66 parties)
Ambassadeurs : Porreca, Giorgio (3x), Smyslov, Vladimir (2x), Andersson, Ulf (2x), Kan, Igor (1x), Sajtar, Jaroslav (1x), Urbanec, Karel (1x), O'Kelly de Galway, Alberic (1x), Taimanov, Mark (1x)
8…Qb6 — 4.6% (17 parties)
Ambassadeurs : Meijers, Viesturs (2x), Rovner, Dmitry (1x), Byvshev, Vasily (1x), De Freitas, Manuela Schmitz (1x), Maderna, Carlos (1x), Honfi, Karoly (1x), Kozma, Julius (1x), Mikkov, Uno (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 8…b6 8…b5 8…cxd4 8…Qb6
<1800 10 30% 50% 10% —
1800-2200 84 40% 40% 12% 1%
2200-2600 195 33% 28% 21% 5%
2600+ 16 38% 38% 12% 6%
Évolution par décennie (% des parties)
Décennie N parties 8…b6 8…b5 8…cxd4 8…Qb6
1940s 7 — — 57% 29%
1950s 20 15% 25% 40% 10%
1960s 6 — 67% 17% 17%
1970s 17 65% 29% 6% —
1980s 30 40% 40% 13% —
1990s 47 55% 13% 19% 2%
2000s 69 42% 17% 20% 7%
2010s 98 37% 33% 14% 3%
2020s 79 19% 56% 14% 4%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
8…b6 37% 19% ▼ -17.7%
8…b5 33% 56% ▲ +23.0%
8…cxd4 14% 14% -0.4%
8…Qb6 3% 4% ▲ +0.7%
Joueurs célèbres
Champions du monde dans cette position
Smyslov, Vladimir — 4 parties
Botvinnik, Mikhail — 1 partie
Euwe, Max — 1 partie
Kramnik, Vladimir — 1 partie
Anand, Viswanathan — 1 partie
Parties historiques
8…b6 — 35.4% (132 parties)
1954 — Porrecca, Giorgio vs Andersen, Borge — 0-1 — Amsterdam NED
1956 — Golz, Werner vs Fuchs, Reinhart — 0-1 — Leipzig ch GDR
1957 — Bertok, Mario Jr. vs Fuchs, Reinhart — 1-0 — Bratislava Bratislava SVK
1971 — Keene, Raymond D vs Donner, Jan-Hein — 0-1 — London ENG-NLD
1973 — Baumgartner, Walter vs Lagland, Goran M — 1/2-1/2 — CCOL8 prel1-02
8…b5 — 32.2% (120 parties)
1950 — Dunkelblum, Arthur vs Euwe, Max — 0-1 — Antwerp BEL
1952 — Keres, Paul vs Platz Macia, Carlos — 1-0 — Budapest HUN
1952 — Udovcic, Mijo vs Gligorić, Svetozar — 0-1 — Belgrade SRB
1954 — Krogius, Nikolai V vs Gusev, Nikolay N — 0-1 — Leningrad RUS
1957 — Sterner, Olof vs Skold, Kristian — 0-1 — Stockholm SWE
8…cxd4 — 17.7% (66 parties)
1943 — Sajtar, Jaroslav vs Urbanec, Karel — 1-0 — Prague CZE
1946 — Smyslov, Vladimir vs O'Kelly de Galway, Alberic — 1-0 — Groningen NED
1947 — Smyslov, Vladimir vs Kan, Igor — 1-0 — Leningrad ch-URS
1949 — Taimanov, Mark vs Bondarevsky, Igor — 1/2-1/2 — Leningrad RUS
1950 — Alatortsev, Vladimir N. vs Flohr, Salo — 1/2-1/2 — Moskou ch-URS
8…Qb6 — 4.6% (17 parties)
1948 — De Freitas, Manuela Schmitz vs Maderna, Carlos — 1/2-1/2 — Mar del Plata ARG
1949 — Rovner, Dmitry vs Byvshev, Vasily — 1/2-1/2 — Vilnius LTU
1950 — Barcza, Gedeon vs Kluger, Gyula — 1-0 — Budapest HUN
1955 — Mikkov, Uno vs Sorokin, Nikolai — 1-0 — ?
1964 — Honfi, Karoly vs Kozma, Julius — 1/2-1/2 — Pecs