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B25o — Closed
1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.f4 e6 7.Nf3 Nge7 8.O-O
Eval: [-0.34]
Les coups candidats
Ambassadeurs : Starostits, Ilmars (88x), Detela, Walter (55x), Rogulj, Branko (52x), Barkwell, Michael C (34x), Meinhardt, Maximilian, Dr. (31x), ? (24x), Casper, Thomas (23x), Bastian, Herbert (23x)
8…Rb8 — 4.3% (473 parties)
Ambassadeurs : Brodie, Hugh (4x), Todorcevic Antic, Miodrag (3x), Kruljac, Nina (3x), Starostits, Ilmars (3x), Pedersen, Svend (2x), Blackstone, John (2x), Zalys, Ignas (2x), Scholz, Jakob (2x)
8…Nd4 — 1.9% (206 parties)
Ambassadeurs : Groenegress, Wilfried (2x), Peniska, Pavel (2x), Mammadova, Gulnar (2x), Toma, Michal (2x), Ivell, Nicholas W (2x), Pickard, Charles (2x), Blom, Kaj (1x), Kolvig, Bent (1x)
8…a6 — 0.9% (100 parties)
Ambassadeurs : Babayev, Kamran (2x), Romero Jose R (1x), Hanken, Jerome B (1x), Andersson Arne (1x), Bryntse, Arne (1x), Driessen, Wim (1x), Van 't Veen, Ger (1x), Oberst, Thomas (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 8…O-O 8…Rb8 8…Nd4 8…a6
<1800 338 88% 5% 1% 3%
1800-2200 4464 90% 5% 2% 1%
2200-2600 3745 94% 3% 1% 0%
2600+ 23 83% 9%
Évolution par décennie (% des parties)
Décennie N parties 8…O-O 8…Rb8 8…Nd4 8…a6
1930s 1 100%
1950s 19 58% 21% 11%
1960s 154 88% 8% 1%
1970s 355 90% 6% 2% 1%
1980s 776 92% 5% 1% 0%
1990s 2745 91% 4% 2% 1%
2000s 3883 92% 4% 2% 1%
2010s 2533 91% 4% 2% 1%
2020s 435 92% 5% 0% 1%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
8…O-O 91% 92% ▲ +1.8%
8…Rb8 4% 5% +0.3%
8…Nd4 2% 0% ▼ -2.1%
8…a6 1% 1% -0.4%
Joueurs célèbres
Champions du monde dans cette position
Karpov, Aleksandr — 4 parties
Karpov, Anatoly — 2 parties
Anand, Viswanathan — 2 parties
Smyslov, Vladimir — 2 parties
Kramnik, Vladimir — 2 parties
Tal, Mikhail — 1 partie
Parties historiques
8…O-O — 91.2% (9939 parties)
1935 — Krogius, Ragnar vs Pelikán, Jiří — 0-1 — Warsaw POL
1950 — Henneberger, Walter vs Leepin, Peter — 0-1 — Lucerne SUI
1951 — Neikirkh, Oleg vs Ciejka, Tadeusz — 0-1 — Sopot
1951 — Nikolac, Juraj vs Rabar, Braslav — 1/2-1/2 — Sarajevo BIH
1954 — Szabo, Stefan vs Pachman, Ludek — 0-1 — Bucharest ROU
8…Rb8 — 4.3% (473 parties)
1950 — Henneberger, Walter vs Mueller, Philip — 1/2-1/2 — Lucerne SUI
1954 — Kakabadze, Eliso vs Alfeevskaja, E. — 1-0 — Riga LAT
1958 — Van Schoor, Karl vs Kramer, Haije — 0-1 — Munich GER
1959 — Zalys, Ignas vs Joyner, Lionel — 0-1 — Montreal ch
1961 — Khalilbeili, Sultan vs Nei, Iivo — 0-1 — Batumi GEO
8…Nd4 — 1.9% (206 parties)
1956 — Wesselowski, Leo vs Groenegress, Wilfried — 1-0 — Rheda
1959 — Blom, Kaj vs Kolvig, Bent — 1/2-1/2 — Copenhagen DEN
1968 — Van den Herik, Jaap vs Capece, Adolivio — 1-0 — Ybbs
1969 — Payne, John II vs Zalys, Ignas — 1/2-1/2 — Lincoln US op
1971 — Bade, Heidrun vs Georgieva, Antonina — 0-1 — Halle GER
8…a6 — 0.9% (100 parties)
1971 — Romero Jose R vs Hanken, Jerome B — 0-1 — USA-72ch Ventura
1971 — Brueggemann, Joachim vs Pfeil, Hartmut — 1-0 — Strasbourg ch20-DDR
1972 — Andersson Arne vs Bryntse, Arne — 1/2-1/2 — corr SWE/K
1982 — Driessen, Wim vs Van 't Veen, Ger — 1-0 — Alkmaar open
1984 — Roos, Daniel vs Denker, Arnold S — 1-0 — New York, NY USA