B87b - 8.O-O - Sozin-Najdorf

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B87b — Sozin-Najdorf
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 a6 7.Bb3 b5 8.O-O
Eval: [-0.10]
Les coups candidats
Ambassadeurs : Conterno, Dominique (35x), Browne, Walter Shawn (27x), Lifshitz, Samuel (21x), Zapata, Alonso (21x), Gelfand, Boris (19x), Sychov, Aleksandr Vitalievi (17x), Krueger, Hilmar (15x), Garcia, Hamlet Danilo (14x)
8…Bb7 — 10.3% (767 parties)
Ambassadeurs : Dvoirys, Semen I. (8x), Bellon Lopez, Juan Manuel (5x), Velimirovic, Dragoljub (5x), Plaskett, H James (5x), Wagman, Stuart (4x), Zaichik, Gennadi (4x), De Firmian, Nick (4x), Ciocaltea, Victor (3x)
8…b4 — 8.4% (620 parties)
Ambassadeurs : Ilincic, Zlatko (8x), Marjanovic, Slavoljub (7x), Ardeleanu, Alin (6x), Femmel, Don (5x), Brenjo, Slavisa (4x), Roiz Baztan, David (4x), Naumann, Alexander (4x), Dvoirys, Semen I. (3x)
8…Nbd7 — 1.7% (123 parties)
Ambassadeurs : Marjanovic, Slavoljub (2x), Enders, Peter (2x), Brikov, Illarion (2x), Sowul, Bartosz (2x), MacGregor, Michael (2x), Lepeshkin, Vladimir (1x), Rashkovsky, Nukhim N (1x), Akopian, Gagik (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 8…Be7 8…Bb7 8…b4 8…Nbd7
<1800 151 72% 11% 12% 3%
1800-2200 2152 77% 10% 9% 2%
2200-2600 3325 80% 9% 8% 2%
2600+ 81 85% 6% 9% —
Évolution par décennie (% des parties)
Décennie N parties 8…Be7 8…Bb7 8…b4 8…Nbd7
1950s 18 11% 50% 39% —
1960s 91 29% 56% 13% 2%
1970s 425 80% 16% 3% 1%
1980s 634 82% 12% 5% 0%
1990s 1785 75% 11% 11% 1%
2000s 2388 77% 9% 10% 2%
2010s 1803 81% 7% 7% 2%
2020s 279 86% 5% 5% 3%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
8…Be7 81% 86% ▲ +4.5%
8…Bb7 7% 5% ▼ -2.0%
8…b4 7% 5% ▼ -2.0%
8…Nbd7 2% 3% ▲ +0.6%
Joueurs célèbres
Champions du monde dans cette position
Kasparov, Garry — 9 parties
Anand, Viswanathan — 5 parties
Tal, Mikhail — 3 parties
Ju, Wenjun — 2 parties
Hou, Yifan — 1 partie
Parties historiques
8…Be7 — 77.9% (5782 parties)
1959 — Chapman, Ken vs Blackstone, John — 0-1 — San Jose, CA USA
1959 — Kotkov, Yuri M vs Polugaevsky, Lev — 0-1 — Voronezh RUS
1960 — Vasiukov, Evgeni vs Sergievsky, Vladimir D — 1-0 — Cheboksary
1960 — Fischer, Robert J vs Olafsson, Fridrik — 1/2-1/2 — Buenos Aires ARG
1961 — Waligora, Franciszek vs Ellrich, Paul — 1/2-1/2 — Minden
8…Bb7 — 10.3% (767 parties)
1952 — Barden, Leonard vs Kottnauer, Cenek — 0-1 — Helsinki olm
1954 — Strauss, Erich vs Parr, Frank — 1-0 — England
1957 — Fischer, Raphael vs Cardoso Da Silva, Roberto — 1/2-1/2 — New York, NY USA
1957 — Sanguineti, Raúl Carlos vs Rubio Aguado, Fernando — 1-0 — Rio de Janeiro BRA
1959 — Palermo, Vicente vs Bahamonde Corral, Alejandro — 1-0 — Buenos Aires ARG
8…b4 — 8.4% (620 parties)
1950 — Lipnitsky, Isaac vs Aronin, Lev — 1-0 — Moskou ch-URS
1952 — Molnar, Francois vs Rossolimo, Nicolas — 0-1 — Paris FRA
1954 — Khasin, Alexander vs Krogius, Nikolai V — 1-0 — Leningrad RUS
1955 — Nei, Iivo vs Chukaev, Egor — 1-0 — Voroshilovgrad
1955 — Estrin, Yakov vs Zurakhov, Vladlen Y — 0-1 — URS-ch sf Leningrad RUS
8…Nbd7 — 1.7% (123 parties)
1964 — Lepeshkin, Vladimir vs Rashkovsky, Nukhim N — 1/2-1/2 — Leningrad RUS
1968 — Akopian, Gagik vs Adler, Viktor — 0-1 — ?
1970 — Zdanovs, Igors vs Zelinsky, Yuri — 1-0 — Riga LAT
1971 — Konikowski, Jerzy vs Przybylski Remacle, Mila — 1-0 — cr [Konikowski,J
1971 — Stean, Michael F vs Marjanovic, Slavoljub — 1-0 — Schilde