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B28g — O’Kelly
1.e4 c5 2.Nf3 a6 3.c4 e6
Eval: [+0.45]
Les coups candidats
4.Nc3 — 73.4% (2151 parties)
Ambassadeurs : Csom, Istvan (16x), Cordova, Emilio (11x), Eingorn, Vereslav S (9x), Meshcheriakova, Evgenia (9x), Joksic, Sinisa (8x), Porubszky-Angyalosine, Maria (7x), Nader, Mohamed (7x), Analiev, Dimitar (7x)
4.d4 — 23.5% (689 parties)
Ambassadeurs : Csom, Istvan (9x), Cordova, Emilio (6x), Cramling, Pia (6x), Strasil, Pavel (5x), Erenska-Barlo, Hanna (4x), Bastian, Herbert (4x), Ivanov, Mikhail M. (4x), Hoermann, Gunther (3x)
4.Be2 — 1.8% (54 parties)
Ambassadeurs : Komliakov, Viktor (3x), Kovacevic, Slobodan (2x), Berke, Ana (2x), De Prins, Emma (1x), Day, Lawrence A. (1x), Palma Almendra, Jose Amado (1x), Lobron, Eric (1x), Volke, Karsten (1x)
4.b3 — 0.5% (15 parties)
Ambassadeurs : Donovan, Nigel P (2x), Eifler, Tim (1x), Biebinger, Holger (1x), Webster, Andrew A (1x), Bujak Izabela (1x), Mikulewicz, Joanna (1x), Heidenfeld, Mark (1x), Bunk, Dietmar (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 4.Nc3 4.d4 4.Be2 4.b3
<1800 79 72% 23% 1%
1800-2200 1154 70% 26% 2% 0%
2200-2600 1340 76% 21% 2% 0%
2600+ 14 79% 14% 7%
Évolution par décennie (% des parties)
Décennie N parties 4.Nc3 4.d4 4.Be2 4.b3
1920s 1 100%
1940s 2 50% 50%
1950s 10 70% 20%
1960s 32 72% 22% 3%
1970s 39 64% 31% 3%
1980s 82 68% 29% 2%
1990s 390 75% 22% 2% 1%
2000s 879 77% 20% 2% 0%
2010s 1183 72% 25% 2% 1%
2020s 312 70% 29% 0%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
4.Nc3 72% 70% ▼ -1.3%
4.d4 25% 29% ▲ +3.8%
4.Be2 2% 0% ▼ -2.2%
4.b3 1% 0% -0.2%
Joueurs célèbres
Champions du monde dans cette position
Hou, Yifan — 7 parties
Euwe, Max — 1 partie
Carlsen, Magnus — 1 partie
Parties historiques
4.Nc3 — 73.4% (2151 parties)
1922 — Euwe, Max vs Tartakower, Savielly — 0-1 — London ENG
1948 — Acebey Michel, Veroska vs O'Kelly de Galway, Alberic — 1/2-1/2 — Buenos Aires ARG
1951 — Levin, Eugene vs Prins, Lodewijk — 1-0 — Hollywood, CA
1952 — Leiva, JC. vs Garibaldi, Oscar — 1/2-1/2 — Buenos Aires ARG
1955 — Foldi, Jozsef vs Portisch, Lajos — 1/2-1/2 — Budapest HUN
4.d4 — 23.5% (689 parties)
1947 — Taimanov, Mark vs Kuzminykh, Evgeny — 1-0 — Leningrad RUS
1959 — Gromek, Jozef vs Witkowski, Stefan — 0-1 — ch POL plof
1959 — Anderson, Frank Ross vs Vranesic, Zvonko — 0-1 — Toronto CAN
1963 — Manasterski, Lutoslaw vs Fabian Henryk — 1/2-1/2 — Glucholazy
1964 — Leigh, BT. vs Collins, Richard Arnold — 1/2-1/2 — Southampton ENG
4.Be2 — 1.8% (54 parties)
1968 — De Prins, Emma vs Day, Lawrence A. — 0-1 — Lugano SUI
1972 — Lobigas, Julian vs Minaya, Juan — 1-0 — Skopje ol (Men) fin-B
1980 — Volke, Karsten vs Evers, Udo — 1-0 — Rostock GER
1984 — Palma Almendra, Jose Amado vs Lobron, Eric — 0-1 — Thessaloniki GRE
1992 — Barry Bertomeu, Enrique vs Garcia Fernandez, Carlos 2000 — 0-1 — Valencia
4.b3 — 0.5% (15 parties)
1994 — Donovan, Nigel P vs Webster, Andrew A — 1/2-1/2 — Londen open
1994 — Heidenfeld, Mark vs Bunk, Dietmar — 1-0 — Schwabisch
1995 — Eifler, Tim vs Biebinger, Holger — 1-0 — SJRP-ch U17 Sargenroth
1998 — Bujak Izabela vs Mikulewicz, Joanna — 1/2-1/2 — ?
2000 — Ho Vo Toan, Anh vs Dang Giang Nam — 0-1 — Dong Thap