B87d - 9.f4 - Sozin-Najdorf (1959)

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B87d — Sozin-Najdorf (1959)
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 a6 7.Bb3 b5 8.O-O Be7 9.f4
Les coups candidats
9…O-O — 46.8% (679 parties)
Ambassadeurs : Bednarski, Jacek (7x), Starace, Umberto (7x), Van Riemsdijk, Herman C. (6x), Ostojic, Predrag (5x), Quinteros, Miguel A. (5x), Ribli, Zoltan (5x), Adorjan, Andras (4x), Skrobek, Ryszard (4x)
9…Bb7 — 38.1% (552 parties)
Ambassadeurs : Borkowski, Franciszek (6x), Marjanovic, Slavoljub (6x), Baljon, Christofoor (4x), Arnason, Jon L (4x), De Firmian, Nick (4x), Platonov, Igor V (3x), Herbrechtsmeier, Christof (3x), Schussler, Harry (3x)
9…b4 — 7.3% (106 parties)
Ambassadeurs : Van Riemsdijk, Herman C. (2x), Bin Naser Ziyad Hasan (2x), Westerinen, Heikki M.J. (1x), Kivipelto, Kaj (1x), Petersen, Finn (1x), Holm, Sejer (1x), Littlewood, John E (1x), Gligoric, Sofija (1x)
9…Qc7 — 6.4% (93 parties)
Ambassadeurs : Krivec, Jana (2x), Margishvili, Giorgi (2x), Khizanashvili, Vakhtang (2x), Bender, Ivan (2x), Hernandez Guerrero, Yadira (1x), Hazim Gonzalez, Elizabeth (1x), Fabbri, Mario (1x), Gatto, Claudio (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 9…O-O 9…Bb7 9…b4 9…Qc7
<1800 52 48% 33% 10% 8%
1800-2200 481 45% 32% 11% 10%
2200-2600 556 48% 42% 5% 4%
2600+ 3 100% — — —
Évolution par décennie (% des parties)
Décennie N parties 9…O-O 9…Bb7 9…b4 9…Qc7
1950s 2 100% — — —
1960s 30 60% 30% 10% —
1970s 228 68% 28% 3% 2%
1980s 270 42% 53% 1% 3%
1990s 304 41% 41% 6% 10%
2000s 355 40% 38% 10% 10%
2010s 203 43% 32% 16% 6%
2020s 58 64% 19% 16% 2%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
9…O-O 43% 64% ▲ +20.4%
9…Bb7 32% 19% ▼ -12.6%
9…b4 16% 16% -0.2%
9…Qc7 6% 2% ▼ -4.2%
Joueurs célèbres
Champions du monde dans cette position
Tal, Mikhail — 3 parties
Kasparov, Garry — 1 partie
Carlsen, Magnus — 1 partie
Parties historiques
9…O-O — 46.8% (679 parties)
1959 — Fischer, Robert J vs Smyslov, Vasily — 0-1 — Bled/Zagreb/Belgrade
1959 — Kotkov, Yuri M vs Polugaevsky, Lev — 0-1 — Voronezh RUS
1960 — Vasiukov, Evgeni vs Sergievsky, Vladimir D — 1-0 — Cheboksary
1961 — Gresser, Gisela Kahn vs Nedeljkovic, Verica — 1/2-1/2 — Vrnjacka Banja SRB
1962 — Ayme, Brandon vs Ostojic, Predrag — 0-1 — Marianske Lazne
9…Bb7 — 38.1% (552 parties)
1965 — Stein, Leonid vs Bobotsov, Milko G — 1-0 — ?
1967 — Pietzsch, Wolfgang vs Tringov, Georgi P — 1/2-1/2 — Sarajevo BIH
1967 — Rubtsova Tatiana vs Nedeljkovic, Alexand — 0-1 — Budva MNE
1968 — Van den Berg, Carel B vs Dahl, Hans-Christian — 1-0 — Ybbs
1969 — Watt, Daniel vs Verber Richard William — 0-1 — ?
9…b4 — 7.3% (106 parties)
1960 — Littlewood, John E vs Gligoric, Sofija — 1/2-1/2 — Engeland simultaan
1966 — Petersen, Finn vs Holm, Sejer — 0-1 — Copenhagen DEN
1968 — Westerinen, Heikki M.J. vs Kivipelto, Kaj — 1-0 — Helsinki FIN
1972 — Van Riemsdijk, Herman C. vs Chemin, Vitorio — 1-0 — Blumenau
1972 — Emma, Jaime vs Miguel, Nahuel — 0-1 — Zarate
9…Qc7 — 6.4% (93 parties)
1970 — Schwartz, Saul vs Blackstone, John — 1/2-1/2 — Santa Monica, CA USA
1972 — Mestel, A Jonathan vs Williams, Kevin D — 1-0 — Sidcup
1975 — Levy, David N L vs Dennehy, Anthony — 1-0 — Glasgow SCO
1976 — Nemes, Gyorgy vs Hansroul, Jacques — 1-0 — Kuortane
1981 — Schroeder, Christoph vs Meyer, Damon Blaine — 1-0 — GER