B87b - 8.O-O - Sozin-Najdorf (1950)

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B87b — Sozin-Najdorf (1950)
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 a6 7.Bb3 b5 8.O-O
Les coups candidats
Ambassadeurs : Conterno, Dominique (35x), Browne, Walter Shawn (29x), Zapata, Alonso (23x), Starace, Umberto (21x), Langat Samuel (20x), Gelfand, Boris (18x), Vaulin, Alexander P. (15x), De Firmian, Nick (14x)
8…Bb7 — 10.3% (771 parties)
Ambassadeurs : Dvoirys, Semen I. (8x), Honfi, Karoly (6x), Wagman, Stuart (5x), Bellon Lopez, Juan Manuel (5x), Velimirovic, Dragoljub (5x), Plaskett, H James (4x), Zaichik, Gennadi (4x), De Firmian, Nick (4x)
8…b4 — 8.3% (624 parties)
Ambassadeurs : Ilincic, Zlatko (9x), Marjanovic, Slavoljub (8x), Ardeleanu, Alin (6x), Brenjo, Slavisa (4x), Naumann, Alexander (4x), Cvetkovic, Srdjan (3x), Dvoirys, Semen I. (3x), Lautier, Joel (3x)
8…Nbd7 — 1.7% (125 parties)
Ambassadeurs : Rompotti, Pertti (3x), Marjanovic, Slavoljub (2x), Brikov, Illarion (2x), Sowul, Bartosz (2x), Akopian, Gagik (1x), Adler, Viktor (1x), Lepeshkin, Vladimir (1x), Rashkovsky, Nukhim N (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 341 75% 11% 11% 2%
1800-2200 2635 78% 10% 9% 2%
2200-2600 3103 79% 9% 8% 2%
2600+ 71 87% 4% 8% —
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 427 80% 16% 3% 1%
1980s 636 82% 12% 5% 0%
1990s 1792 75% 11% 11% 1%
2000s 2396 77% 9% 10% 2%
2010s 1808 81% 7% 7% 2%
2020s 313 86% 5% 4% 3%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
8…Be7 81% 86% ▲ +4.4%
8…Bb7 7% 5% ▼ -1.9%
8…b4 7% 4% ▼ -2.6%
8…Nbd7 2% 3% ▲ +0.9%
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% (5828 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 — Gresser, Gisela Kahn vs Nedeljkovic, Verica — 1/2-1/2 — Vrnjacka Banja SRB
8…Bb7 — 10.3% (771 parties)
1952 — Barden, Leonard vs Kottnauer, Cenek — 0-1 — Helsinki olm
1954 — Strauss, Erich vs Parr, Frank — 1-0 — England
1957 — Fischer, Robert J vs Cardoso, Radolfo Tan — 1/2-1/2 — New York, NY USA
1957 — Sanguineti, Raúl Carlos vs Aperador Rubio, Ricardo — 1-0 — Rio de Janeiro BRA
1959 — Palermo, Vicente vs Lopez Bahamonde — 1-0 — Buenos Aires ARG
8…b4 — 8.3% (624 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% (125 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, Adam — 1-0 — cr [Konikowski,J
1971 — Stean, Michael F vs Marjanovic, Slavoljub — 1-0 — Schilde