B89b - 7…a6 - Sozin (1948)

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B89b — Sozin (1948)
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 Nc6 7.Be3 a6
Les coups candidats
Ambassadeurs : Madl, Ildiko (22x), Lamford, Paul (12x), Kupreichik, Viktor D (11x), Lerner, Konstantin Z (11x), Inkiov, Ventzislav (11x), Nunn, John D M (10x), Gupta, Abhijeet (10x), Lisenko, Alexander V (9x)
8.Bb3 — 31.8% (1199 parties)
Ambassadeurs : Madl, Ildiko (12x), Lerner, Konstantin Z (11x), De Firmian, Nick (11x), Velimirovic, Dragoljub (9x), Aseev, Konstantin N (8x), Lupulescu, Constantin (8x), Popovic, Petar (7x), Mitkov, Nikola (7x)
8.O-O — 3.9% (148 parties)
Ambassadeurs : Thipsay, Praveen M (3x), Sandrin, Angelo (1x), Kaiser, Wolfgang (1x), Hennings, Artur (1x), Polugaevsky, Lev (1x), Liberzon, Vladimir M (1x), Portisch, Lajos (1x), Heintze, Marion (1x)
8.f3 — 2.5% (93 parties)
Ambassadeurs : Albert, Kornelia (3x), Grabics, Monika (2x), Zamalloa, Fidel (2x), Blackstone, John (1x), Pedez, Onestes (1x), Dokladal, P (1x), Zavodny, Zdenek (1x), Ukkonen, Tapio (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 8.Qe2 8.Bb3 8.O-O 8.f3
<1800 105 30% 21% 14% 6%
1800-2200 958 50% 31% 6% 5%
2200-2600 2190 60% 34% 2% 1%
2600+ 29 48% 38% 3% —
Évolution par décennie (% des parties)
Décennie N parties 8.Qe2 8.Bb3 8.O-O 8.f3
1950s 6 — 17% 33% 17%
1960s 63 30% 56% 8% 2%
1970s 206 59% 36% 1% —
1980s 439 76% 17% 1% 1%
1990s 975 56% 34% 3% 2%
2000s 1132 53% 33% 4% 3%
2010s 677 45% 35% 7% 3%
2020s 274 57% 27% 4% 2%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
8.Qe2 45% 57% ▲ +11.4%
8.Bb3 35% 27% ▼ -8.4%
8.O-O 7% 4% ▼ -2.3%
8.f3 3% 2% ▼ -1.1%
Joueurs célèbres
Champions du monde dans cette position
Tal, Mikhail — 4 parties
Kasparov, Garry — 3 parties
Hou, Yifan — 3 parties
Kramnik, Vladimir — 2 parties
Anand, Viswanathan — 2 parties
Ju, Wenjun — 1 partie
Ding, Liren — 1 partie
Gukesh D — 1 partie
Parties historiques
8.Qe2 — 55.3% (2085 parties)
1964 — Litvinov, Vladimir vs Muehlberg, Siegfried — 1-0 — Minsk BLR
1966 — Kupreichik, Viktor D vs Liljedahl, Lennart — 1-0 — Groningen NED
1967 — Zatulovskaya, Tatiana vs ? — 1/2-1/2 — Subotica SRB
1967 — Palda, Karl vs Grabler — 1-0 — Austria
1968 — Schoeneberg, Manfred vs Smejkal, Jan — 0-1 — Ybbs
8.Bb3 — 31.8% (1199 parties)
1959 — Fabian, Jaroslav vs Rejfir, Josef — 1/2-1/2 — Cerveny Kostelec
1963 — Ladanyike-Karakas, Eva vs Borisenko-Belova, Valentina — 0-1 — ?
1964 — Fischer, Robert J vs King, Stan — 0-1 — Westerly
1964 — Fischer, Kevin R vs King, Saharah — 0-1 — Westerly simultaan
1965 — Honfi, Karoly vs Jakobsen, Ole — 0-1 — Copenhagen DEN
8.O-O — 3.9% (148 parties)
1955 — McLellan, Richard Alan vs Colby, Kenneth Mark — 1-0 — Long Beach, CA USA
1955 — Cross, Robert Gary vs Kovacs, Zoltan — 1-0 — ?
1965 — Sandrin, Angelo vs Kaiser, Wolfgang — 1-0 — North Central Open
1965 — Liberzon, Vladimir M vs Portisch, Lajos — 1-0 — Erevan ARM
1966 — Jackson, Leroy vs Dahlberg, Ivars — 0-1 — Seattle, WA USA
8.f3 — 2.5% (93 parties)
1959 — Blackstone, John vs Pedez, Onestes — 0-1 — Omaha, NE
1965 — Dokladal, P vs Zavodny, Zdenek — 1-0 — Brno CZE
1982 — Slavotinek, Anne vs David Glaz, Ilana — 0-1 — Lucerne SUI
1983 — Jerkovic, Boris vs Galic, Zeljko — 0-1 — Bela Crkva open
1985 — Ignacio, Robin B. vs Loureda Garcia, Jose Antonio — 0-1 — ?