C81b - 9…Bc5 - Open Keres Attack

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C81b — Open Keres Attack
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.Qe2 Bc5
Eval: [+0.55]
Les coups candidats
10.Be3 — 70.0% (266 parties)
Ambassadeurs : Grivas, Efstratios (5x), Lombart, Philippe (5x), Honfi, Karoly (4x), Matulovic, Milan (4x), Antoshin, Vladimir S (4x), Georgiev, Krum (4x), ? (4x), Rossetto, Hector (3x)
10.Nbd2 — 23.7% (90 parties)
Ambassadeurs : Estrin, Yakov (3x), Grivas, Efstratios (3x), Honfi, K. (2x), Jansa, Vlastimil (2x), Augustin, Josef (2x), Sumar, Julio (2x), Sobeck, Guenter (2x), Lombart, Philippe (2x)
10.c3 — 4.2% (16 parties)
Ambassadeurs : Georgescu, Vasile Sr (1x), Troianescu, Octav (1x), Draxl, Rudolph (1x), Anderson, Frank Ross (1x), Karim Firrat (1x), Zapata Jaya, Wilson Daniel (1x), Maus, Siegfried (1x), Pieper-Emden, Carsten (1x)
10.a4 — 1.1% (4 parties)
Ambassadeurs : Ousatchi, Mark (1x), Shianovsky, Vladislav I (1x), Nilsson, Zandor (1x), Hult, Bjorn (1x), Kovacs, Laszlo M (1x), Haag, Ervin (1x), Cygan, Tomasz (1x), Kozdryk, Andrzej (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 10.Be3 10.Nbd2 10.c3 10.a4
<1800 9 56% 33% 11% —
1800-2200 87 64% 32% 3% —
2200-2600 129 75% 20% 3% —
2600+ 5 60% 40% — —
Évolution par décennie (% des parties)
Décennie N parties 10.Be3 10.Nbd2 10.c3 10.a4
1940s 5 80% 20% — —
1950s 25 52% 40% 4% 4%
1960s 46 74% 20% 2% 4%
1970s 37 70% 22% 8% —
1980s 37 73% 19% 5% —
1990s 74 78% 15% 4% 1%
2000s 64 73% 17% 8% —
2010s 66 62% 35% 2% —
2020s 26 62% 38% — —
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
10.Be3 62% 62% ▼ -0.6%
10.Nbd2 35% 38% ▲ +3.6%
10.c3 2% 0% ▼ -1.5%
10.a4 0% 0% +0.0%
Joueurs célèbres
Champions du monde dans cette position
Smyslov, Vladimir — 1 partie
Parties historiques
10.Be3 — 70.0% (266 parties)
1948 — Pilnik, Herman vs Garcia Balado L — 1-0 — Buenos Aires/La Plata
1949 — Aitken, James vs Durham, Daniel — 1-0 — London ENG
1949 — Znosko-Borovsky, Eugene vs Unzicker, Wolfgang — 0-1 — Lucerne SUI
1949 — Ivkov, Borislav vs Fuderer, Andrija — 0-1 — Yugoslavia
1950 — Mertins, Klaus vs Bachl, Alois — 0-1 — Northeim
10.Nbd2 — 23.7% (90 parties)
1947 — Sahlmann, Walter vs Roedl, Ludwig — 0-1 — Weidenau
1950 — Konstantinov, Alexander Ivanovich vs Estrin, Yakov — 1/2-1/2 — Gorky
1950 — Konstantinov, Alexandr vs Estrin, Yakov — 1/2-1/2 — URS-ch sf Gorky
1950 — Flores Alvarez, Rodrigo vs Sumar, Julio — 1-0 — Dubrovnik CRO
1950 — Aguilar Flores, Renata Camila vs Sumar, Julio — 1-0 — Dubrovnik olm
10.c3 — 4.2% (16 parties)
1955 — Draxl, Rudolph vs Anderson, Frank Ross — 1-0 — Toronto CAN
1967 — Georgescu, Vasile Sr vs Troianescu, Octav — 0-1 — Bucharest ROU
1973 — Nepomuceno Moreno, Emilio vs Casacobos — 1-0 — ESP
1976 — Karim Firrat vs Zapata Jaya, Wilson Daniel — 0-1 — Caracas VEN
1976 — Bade, Heidrun vs Winter, Irene — 1/2-1/2 — Groeditz
10.a4 — 1.1% (4 parties)
1953 — Nilsson, Zandor vs Hult, Bjorn — 1-0 — Oerebro
1960 — Ousatchi, Mark vs Shianovsky, Vladislav I — 1/2-1/2 — ?
1965 — Kovacs, Laszlo M vs Haag, Ervin — 1/2-1/2 — Budapest HUN
1991 — Cygan, Tomasz vs Kozdryk, Andrzej — 1/2-1/2 — Pyskovice