C80n - 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.a4 - Open

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C80n — Open
1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.a4
Eval: [-0.15]
Les coups candidats
9…b4 — 56.5% (156 parties)
Ambassadeurs : Kindermann, Stefan (4x), Grivas, Efstratios (3x), Bronstein, Luis Marcos (3x), Jussupow, Artur (3x), Herzog, Klaus (3x), Povah, Nigel E (2x), Rigo, Janos (2x), Tukmakov, Vladimir B (2x)
9…Na5 — 21.7% (60 parties)
Ambassadeurs : Hlavac, Rudolf (3x), Vidmar, Milan Sr (2x), Van der Spoel, Ruud (2x), Schoffelmeer, Frans (2x), Mieses, Samuel (1x), Lange, Max (1x), Aadhyeta Roy (1x), Bernstein, Jacob (1x)
9…Rb8 — 10.9% (30 parties)
Ambassadeurs : Rosenthal, Samuel (2x), Salwe, Georg (2x), Yates, Frederic D (2x), Pokojowczyk, Jerzy (2x), Vogt, Lothar (2x), Winawer, Simon (1x), Winawer, Szymon (1x), Romanovsky, Pjotr (1x)
9…Nc5 — 9.8% (27 parties)
Ambassadeurs : Simagin, Vladimir (1x), Ravinsky, Grigory (1x), Savereide, Diane (1x), Richmond, Peter Allan (1x), Maresca, F. (1x), Rallo, V. (1x), Privara, Igor (1x), Matas, Stanislav (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 9…b4 9…Na5 9…Rb8 9…Nc5
<1800 4 75% — — 25%
1800-2200 64 55% 20% 3% 22%
2200-2600 97 68% 14% 13% 4%
2600+ 4 100% — — —
Évolution par décennie (% des parties)
Décennie N parties 9…b4 9…Na5 9…Rb8 9…Nc5
1870s 4 25% 25% 50% —
1880s 1 100% — — —
1890s 3 100% — — —
1900s 13 23% 46% 31% —
1910s 13 23% 23% 54% —
1920s 1 — 100% — —
1930s 1 — 100% — —
1940s 3 33% 67% — —
1950s 2 50% — — 50%
1960s 4 — 25% 50% —
1970s 17 41% 35% 18% 6%
1980s 54 63% 24% 9% 4%
1990s 55 60% 24% 5% 7%
2000s 66 65% 15% 6% 14%
2010s 28 61% 11% — 29%
2020s 11 82% — — 18%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
9…b4 61% 82% ▲ +21.1%
9…Na5 11% 0% ▼ -10.7%
9…Rb8 0% 0% +0.0%
9…Nc5 29% 18% ▼ -10.4%
Joueurs célèbres
Champions du monde dans cette position
Alekhine, Alexander — 3 parties
Ding, Liren — 1 partie
Parties historiques
9…b4 — 56.5% (156 parties)
1870 — Stern Adolf vs Minckwitz, Johannes — 1-0 — It Baden-Baden GER
1881 — Judd, Max vs McKenzie, George — 0-1 — St Louis
1893 — Mieses, Jacques vs Kirschner, Heinrich — 1-0 — Leipzig GER
1894 — Delmar, Eugene vs Baird, David — 1/2-1/2 — New York, NY USA
1898 — Voigt, Hermann G vs Shipley, Walter P — 1-0 — Philadelphia, PA USA
9…Na5 — 21.7% (60 parties)
1875 — Mieses, Samuel vs Lange, Max — 1/2-1/2 — Leipzig GER
1903 — Loman Valencia Gonzalez, Emiliano vs Neumann Feliu, Rodrigo — 0-1 — Hilversum NED
1904 — Boyarkov, V vs Solovtsov, Alexander Vladimiro — 0-1 — Russia
1905 — Tartakower, Savielly vs Spielmann, Rudolf — 1/2-1/2 — Ostende
1905 — Kunze, Carlo vs Vidmar, Milan Sr — 0-1 — Barmen GER
9…Rb8 — 10.9% (30 parties)
1870 — Rosenthal, Samuel vs Winawer, Simon — 1/2-1/2 — Baden-Baden GER
1870 — Rosenthal, Samuel vs Winawer, Szymon — 1/2-1/2 — Baden-Baden GER
1903 — Duz-Khotimirsky, Fedor Ivanovich vs Salwe, Georg — 0-1 — Kiev UKR
1903 — Bernstein, Olivia vs Salwe, Georg — 1/2-1/2 — Kiev UKR
1904 — Fawcett, Edward Douglas vs Willmott, BD. — 1-0 — Hastings ENG
9…Nc5 — 9.8% (27 parties)
1955 — Simagin, Vladimir vs Ravinsky, Grigory — 1/2-1/2 — Moscow RUS
1975 — Privara, Igor vs Matas, Stanislav — 1-0 — Stary Smokovec SVK
1984 — Savereide, Diane vs Richmond, Peter Allan — 1-0 — Catford Cricket Club
1984 — Maresca, F. vs Rallo, V. — 1-0 — Italy
1991 — Schiller, Eric vs Allison Mariama Stern — 0-1 — Las Vegas, NV USA