E56b - 8.a3 - Main Line (1974)

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E56b — Main Line (1974)
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O Nc6 8.a3
Les coups candidats
Ambassadeurs : Averbakh, Yuri L (29x), Donner, Jan-Hein (27x), Taimanov, Mark (26x), Popov, Vladimir Valentinovich (26x), Sciarretta, Robert W (25x), Knaak, Rainer (23x), Langer, Raimund (21x), Szabo, Laszlo (18x)
Ambassadeurs : Krogius, Nikolai V (9x), Mason, Ian J (9x), Cherepkov, Alexander V (7x), Kozma, Julius (7x), Tal, Mikhail (5x), Kinnmark, Ove (5x), ? (5x), Peralta, Fernando (5x)
Ambassadeurs : Golombek, Harry (6x), Donner, Jan-Hein (6x), Ligterink, Gert (6x), Korchnoi, Viktor (5x), Portych, Václav (5x), Taimanov, Mark (4x), Urbanec, Karel (3x), Zavodny, Zdenek (3x)
Ambassadeurs : Rapaka Samuel Paul (9x), Miguel, Nahuel (8x), Wade, Robert G (6x), Gligoric, Sofija (5x), Larsen, Bent Ravn (4x), Niebling, Ferdinand (4x), Ivkov, Borislav (3x), Donner, Jan-Hein (3x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 8…Bxc3 8…Ba5 8…cxd4 8…dxc4
<1800 322 90% 4% 3% 3%
1800-2200 2298 89% 6% 3% 2%
2200-2600 3294 89% 8% 2% 1%
2600+ 174 83% 14% 1% 2%
Évolution par décennie (% des parties)
Décennie N parties 8…Bxc3 8…Ba5 8…cxd4 8…dxc4
1950s 527 79% 8% 10% 3%
1960s 441 71% 10% 9% 9%
1970s 438 75% 7% 7% 11%
1980s 468 83% 7% 5% 4%
1990s 884 90% 4% 3% 2%
2000s 1968 91% 5% 3% 1%
2010s 3070 90% 8% 1% 1%
2020s 196 90% 8% 1% 1%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
8…Bxc3 90% 90% -0.1%
8…Ba5 8% 8% ▲ +0.6%
8…cxd4 1% 1% -0.5%
8…dxc4 1% 1% -0.0%
Joueurs célèbres
Champions du monde dans cette position
Tal, Mikhail — 10 parties
Kramnik, Vladimir — 8 parties
Hou, Yifan — 7 parties
Botvinnik, Mikhail — 6 parties
Karpov, Anatoly — 2 parties
Kasparov, Garry — 2 parties
Anand, Viswanathan — 1 partie
Parties historiques
8…Bxc3 — 87.4% (6986 parties)
1950 — Milic, Borislav vs Kevitz, Alexander — 1/2-1/2 — USA
1950 — Borisenko, Georgy K vs Averbakh, Yuri L — 1/2-1/2 — Moskou ch-URS
1950 — Wood, Gabriel vs Mitchell, Graham — 1-0 — corr Wch1
1950 — Rapaka Samuel Paul vs Weaks — 1/2-1/2 — Los Angeles, CA USA
1951 — Kramer, Haije vs Poulsen, Christian — 1/2-1/2 — Beverwijk NED
8…Ba5 — 6.8% (540 parties)
1950 — Gligoric, Sofija vs Rapaka Samuel Paul — 1/2-1/2 — radio
1950 — Balogh, Janos vs Cuadrado, Antonio — 1/2-1/2 — ICCF
1951 — Petrosian, Tigran A. vs Tolush, Alexander — 0-1 — Tbilisi GEO
1951 — Petrosian, Tigran V. vs Alexander Tadala — 0-1 — Tbilisi GEO
1951 — Novotelnov, Nikolai vs Smyslov, Vasily — 1-0 — Moskou ch-URS
8…cxd4 — 3.4% (275 parties)
1950 — Bondarevsky, Igor vs Sokolsky, Alexey — 1/2-1/2 — Moskou ch-URS
1950 — Bronstein, David I vs Boleslavsky, Isaac — 1/2-1/2 — Budapest HUN
1951 — Gligoric, Sofija vs Golombek, Harry — 1-0 — Hastings ENG
1951 — Pirc, Vasja vs Golombek, Harry — 1-0 — Birmingham ENG
1951 — Benko, Pal vs Lokvenc, Josef — 1/2-1/2 — Marianske Lazne zt
8…dxc4 — 2.3% (182 parties)
1952 — Miguel, Nahuel vs Rapaka Samuel Paul — 1-0 — ?
1953 — Krebs, Hans vs Duenhaupt, Heinz-Wilhelm Dr — 1/2-1/2 — ?
1953 — Miguel, Nahuel vs Rapaka Samuel Paul — 1-0 — Buenos Aires ARG
1953 — Costa, Stephane Jose vs Shocron, Ruben — 1/2-1/2 — Bariloche
1953 — Miguel, Nahuel vs Rapaka Samuel Paul — 1/2-1/2 — Buenos Aires ARG