B28j - 3.c3 d5 - O’Kelly (1949)

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B28j — O’Kelly (1949)
1.e4 c5 2.Nf3 a6 3.c3 d5
Les coups candidats
4.exd5 — 93.1% (3197 parties)
Ambassadeurs : Csom, Istvan (31x), Kurajica, Bojan (20x), Borda, Lajos (16x), Analiev, Dimitar (16x), Durán Vallverdú, Joan (15x), Taimanov, Mark (12x), Sternik, Ryszard (12x), Meshcheriakova, Evgenia (10x)
4.e5 — 5.8% (199 parties)
Ambassadeurs : Rau, Herbert (3x), Nitsch, Thomas (3x), Jordan, James (2x), Van Dommelen, Martin (2x), Batkoski, Nenad (2x), Kizza, Faruk Fauza Karim (2x), Kilgour, Ian A. (1x), Kleinplatz, Sam (1x)
4.d3 — 0.5% (17 parties)
Ambassadeurs : Dermitzoglou (1x), Bousios, Hristos (1x), Gauthier, Frederic (1x), Zalys, Ignas (1x), Abaza, Marin (1x), Gonzalez, Fabian (1x), Lo Curto, Emanuele (1x), Racioppo, Paolo (1x)
4.Bd3 — 0.2% (6 parties)
Ambassadeurs : Barnes, Courtney (2x), Fabio, Ferreira (2x), Frankot, E. (1x), Boonman, P. (1x), Kostov, Nikolay (1x), Yordanov, Boris (1x), Soler, Soraya (1x), Castrillon Gomez, Melissa (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 4.exd5 4.e5 4.d3 4.Bd3
<1800 234 87% 10% 2% 0%
1800-2200 1643 91% 8% 0% 0%
2200-2600 1246 98% 2% 0% —
2600+ 28 96% 4% — —
Évolution par décennie (% des parties)
Décennie N parties 4.exd5 4.e5 4.d3 4.Bd3
1950s 25 100% — — —
1960s 50 100% — — —
1970s 47 91% 4% 4% —
1980s 90 97% 3% — —
1990s 346 91% 7% 1% 1%
2000s 882 93% 6% 0% —
2010s 1187 93% 6% 0% 0%
2020s 807 94% 5% 1% —
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
4.exd5 93% 94% ▲ +1.6%
4.e5 6% 5% ▼ -1.4%
4.d3 0% 1% +0.3%
4.Bd3 0% 0% -0.3%
Joueurs célèbres
Champions du monde dans cette position
Karpov, Anatoly — 1 partie
Tal, Mikhail — 1 partie
Kasparov, Garry — 1 partie
Carlsen, Magnus — 1 partie
Ju, Wenjun — 1 partie
Anand, Viswanathan — 1 partie
Parties historiques
4.exd5 — 93.1% (3197 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
4.e5 — 5.8% (199 parties)
1978 — Schwarz, Milan vs Jordan, James — 1/2-1/2 — US Open
1978 — Vasconocellos vs Jordan, James — 0-1 — US Open
1982 — Kilgour, Ian A. vs Kleinplatz, Sam — 1-0 — Toronto CAN
1982 — Coerts, Marten vs Driessen, Wim — 0-1 — Alkmaar open
1986 — Roji, Cwenga vs Andres Francisco Jimenez Rodriguez — 0-1 — Colonia cadetes
4.d3 — 0.5% (17 parties)
1972 — Gauthier, Frederic vs Zalys, Ignas — 0-1 — Montreal CAN
1976 — Dermitzoglou vs Bousios, Hristos — 0-1 — Thessaloniki GRE
1996 — Abaza, Marin vs Gonzalez, Fabian — 0-1 — Barcelona ESP
1999 — Lo Curto, Emanuele vs Racioppo, Paolo — 0-1 — Turin ITA
2008 — Castaignet, Laurent vs Van Rompu, Alexandre — 1/2-1/2 — France
4.Bd3 — 0.2% (6 parties)
1992 — Barnes, Courtney vs Fabio, Ferreira — 0-1 — Manila ol-W
1992 — Barnes, Courtney vs Fabio, Ferreira — 0-1 — Manila ol women
1992 — Frankot, E. vs Boonman, P. — 1-0 — Nijmegen NED
2010 — Kostov, Nikolay vs Yordanov, Boris — 0-1 — Sofia BUL
2013 — Soler, Soraya vs Castrillon Gomez, Melissa — 0-1 — Ibague