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B25k — Closed (1962)
1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.f4 e5 7.Nf3 Nge7 8.O-O
Les coups candidats
8…O-O — 82.0% (804 parties)
Ambassadeurs : Bastian, Herbert (6x), Gheorghiu, Florin (5x), Krapivin, Alexander (4x), Blatny, Frantisek (3x), Siaperas, Triantafyllos (3x), Csom, Istvan (3x), Drexel, Christian (3x), Caire, Francois (3x)
8…Nd4 — 8.0% (78 parties)
Ambassadeurs : Franco Ocampos, Zenon (5x), Liebert, Heinz (3x), Bartsch, Berthold (3x), Kveinys, Aloyzas (2x), Bujosa Ribas, Joan (2x), Clarke, Peter (1x), Zichichi, Alvise (1x), Yilmaz, Turhan (1x)
8…exf4 — 4.4% (43 parties)
Ambassadeurs : Sammalvuo, Tapani (3x), Clares Huanca, Danner Saed (2x), Lehti, Juhani (2x), Kudrin, Sergey (2x), Kucera, Petr (1x), Znamenacek, Kvetoslav (1x), Whitehead, Jay Edwin (1x), Watson, John (1x)
8…h6 — 1.4% (14 parties)
Ambassadeurs : Velema, Sander (2x), Lupo, Alfredo (1x), Passerotti, Pierluigi (1x), Trisic, Aleksandar (1x), Bruemmel, Arend (1x), Horak, Michal (1x), Jaracz, Pawel (1x), Koster, Ramon (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 8…O-O 8…Nd4 8…exf4 8…h6
<1800 48 92% 2% 6% —
1800-2200 431 81% 7% 4% 1%
2200-2600 369 79% 11% 6% 3%
2600+ 4 75% — 25% —
Évolution par décennie (% des parties)
Décennie N parties 8…O-O 8…Nd4 8…exf4 8…h6
1960s 33 97% 3% — —
1970s 36 89% — 6% —
1980s 52 90% 4% 2% —
1990s 230 81% 7% 6% 1%
2000s 362 80% 10% 4% 2%
2010s 218 82% 9% 4% 1%
2020s 49 78% 6% 8% 4%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
8…O-O 82% 78% ▼ -4.1%
8…Nd4 9% 6% ▼ -2.6%
8…exf4 4% 8% ▲ +4.0%
8…h6 1% 4% ▲ +2.7%
Joueurs célèbres
Champions du monde dans cette position
Karpov, Anatoly — 2 parties
Ju, Wenjun — 1 partie
Parties historiques
8…O-O — 82.0% (804 parties)
1961 — Milev, Zdravko vs Prakhov, Valentin Asenov — 1/2-1/2 — Sofia BUL
1961 — Chernov, Anton vs Salov, Sergej — 0-1 — ?
1962 — Ignatiev, Felix N vs Vasiukov, Evgeni — 1/2-1/2 — Moscow RUS
1962 — Minev, Nikolay N vs Vasiukov, Evgeni — 1/2-1/2 — Lasker mem Berlin-Ost
1964 — Blatny, Frantisek vs Cucka, Josef — 1-0 — Brno CZE
8…Nd4 — 8.0% (78 parties)
1968 — Clarke, Peter vs Zichichi, Alvise — 1/2-1/2 — Lugano olm
1981 — Bohm, E vs Hlavac, Rudolf — 1/2-1/2 — SK Vresova-Dresden M
1989 — Yilmaz, Turhan vs Brunner, Lucas — 0-1 — Haifa etc
1990 — Schmidt, Aaron Joel vs Rechmann, Peter — 1-0 — GER
1990 — Boutin, Bernard vs Mihevc-Mohr, Narcisa — 0-1 — Sas van Gent NED
8…exf4 — 4.4% (43 parties)
1979 — Kucera, Petr vs Znamenacek, Kvetoslav — 1/2-1/2 — Decin CZE
1979 — Whitehead, Jay Edwin vs Watson, John — 1/2-1/2 — Lone Pine open
1981 — Przewoznik, Jan vs Kudrin, Sergey — 1/2-1/2 — WchT U26 Graz AUT
1990 — Frappier, Clement vs Berube, Richard — 0-1 — Quebec Open
1990 — Rehm, Robert, Dr. vs Schuh, Hubert — 0-1 — Baden-Baden GER
8…h6 — 1.4% (14 parties)
1998 — Lupo, Alfredo vs Passerotti, Pierluigi — 0-1 — Campobasso
1998 — Horak, Michal vs Jaracz, Pawel — 1/2-1/2 — Pardubice CZE
1999 — Trisic, Aleksandar vs Bruemmel, Arend — 1-0 — Hamburg GER
2000 — Niemers, Johannes vs Podzielny, Karl-Heinz — 0-1 — Essen GER
2002 — Velema, Sander vs Bjarnason, Saemundur — 0-1 — Vlissingen NED