B28a - 3.* - O'Kelly Variation (1936)

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B28a — O'Kelly Variation (1936)
1.e4 c5 2.Nf3 a6
Les coups candidats
Ambassadeurs : Zalys, Ignas (41x), Collins, Richard (35x), Bakalar, Jan (16x), Borda, Lajos (15x), Frey, Walter (14x), Skorobogatykh, Andrey (13x), Schweber, Samuel (12x), Helin, Mikael (12x)
Ambassadeurs : Csom, Istvan (42x), Borda, Lajos (25x), Sternik, Ryszard (24x), Ackermann, Hans Werner (23x), Kurajica, Bojan (23x), Franklin, Michael J (20x), Green, Michael (20x), Meshcheriakova, Evgenia (16x)
Ambassadeurs : Csom, Istvan (26x), Franklin, Michael J (26x), Borda, Lajos (20x), Meshcheriakova, Evgenia (18x), Joksic, Sinisa (12x), Bastian, Herbert (12x), Zalys, Ignas (11x), Erenska-Barlo, Hanna (11x)
Ambassadeurs : Csom, Istvan (17x), Franklin, Michael J (10x), Vasilevich, Tatjana (9x), Zuluaga Mancilla, Cesar (9x), Karimov, Farukh (8x), Gaponenko, Inna (7x), Ackermann, Hans Werner (7x), Taimanov, Mark (6x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 3.d4 3.c3 3.c4 3.Nc3
<1800 2725 47% 21% 12% 10%
1800-2200 13637 34% 25% 22% 9%
2200-2600 7683 12% 35% 28% 14%
2600+ 112 4% 49% 21% 8%
Évolution par décennie (% des parties)
Décennie N parties 3.d4 3.c3 3.c4 3.Nc3
1950s 248 42% 20% 24% 7%
1960s 539 41% 23% 16% 12%
1970s 483 29% 24% 25% 13%
1980s 725 28% 28% 23% 11%
1990s 3509 37% 22% 21% 9%
2000s 8062 35% 24% 20% 11%
2010s 10039 30% 28% 21% 11%
2020s 4390 18% 32% 29% 8%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
3.d4 30% 18% ▼ -11.6%
3.c3 28% 32% ▲ +3.5%
3.c4 21% 29% ▲ +8.2%
3.Nc3 11% 8% ▼ -2.7%
Joueurs célèbres
Champions du monde dans cette position
Hou, Yifan — 10 parties
Tal, Mikhail — 8 parties
Carlsen, Magnus — 5 parties
Ju, Wenjun — 4 parties
Karpov, Anatoly — 3 parties
Kasparov, Garry — 2 parties
Anand, Viswanathan — 1 partie
Parties historiques
3.d4 — 30.8% (8632 parties)
1950 — Versfeld, Loet vs Stumpers, Louis — 1-0 — Brabants
1950 — Penrose, Jonathan vs Tartakower, Savielly — 1-0 — Southsea ENG
1950 — Ivkov, Borislav vs Van den Berg, Carel B — 1-0 — Utrecht NED
1950 — Smyslov, Vasily vs Mueller, Hans — 1-0 — Venice ITA
1950 — Poulsen, Christian vs O'Kelly, Albéric de Galway — 0-1 — Dubrovnik olm
3.c3 — 26.6% (7438 parties)
1950 — Unzicker, Ferdinand, Dr. vs Beni, Alfred — 1-0 — Dubrovnik olm
1950 — Pachman, Ludek vs Mueller, Hans — 1-0 — Venice ITA
1950 — Rellstab, Ludwig vs O'Kelly, Albéric de Galway — 1/2-1/2 — Bled SLO
1951 — Canal, Esteban vs Paoli, Enrico — 1/2-1/2 — Reggio Emilia ITA
1951 — Canal, Esteban vs Keller, Hans — 0-1 — Reggio Emilia ITA
3.c4 — 22.0% (6149 parties)
1950 — Schmid, Lothar vs Steiner, Herman — 1-0 — Dubrovnik olm
1950 — Canal, Esteban vs Eken, Max — 1/2-1/2 — Dubrovnik olm
1950 — Stumpers, Louis vs Van Schoor, Karl — 1-0 — Antwerp BEL
1950 — Dimitrov Petar vs Kottnauer, Cenek — 1-0 — CSR-BUL Prague CZE
1950 — Adams, Weaver vs Penrose, Jonathan — 1-0 — Hastings ENG
3.Nc3 — 10.6% (2959 parties)
1950 — Rossolimo, Nicolas vs Steiner, Herman — 1-0 — Venice ITA
1950 — Paoli, Enrico vs Bahro, Tom — 1/2-1/2 — Vienna AUT
1951 — Medina-Garcia, Antonio vs Fuentes, Manuel — 0-1 — Madrid ESP
1951 — Eastman, Gavey vs Martin, Raymond — 1-0 — Forth Worth
1953 — Tal, Mikhail vs Josif Israel Zilber — 1-0 — Riga LAT