B59j - 9.f4 - Boleslavsky (1947)

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B59j — Boleslavsky (1947)
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 e5 7.Nb3 Be7 8.O-O O-O 9.f4
Les coups candidats
9…a5 — 76.4% (602 parties)
Ambassadeurs : Schneider, Lars-Ake (4x), Ragozin, Viacheslav (3x), Kasparov, Garry (3x), Galazewski, Tomasz (3x), Skurski, Jan (3x), Penrose, Jonathan (2x), Heikkila, Heikki (2x), Olafsson, Fridrik (2x)
9…exf4 — 13.3% (105 parties)
Ambassadeurs : Feher, Gyula (2x), Zozulia, Anna (2x), Bouna, Safwan younes (1x), Delon, Ilia Nick (1x), Jarzynski, Andrzej (1x), Tischbierek, Raj (1x), Kuzmin, Gennadi (1x), Tsaturian, Valeri (1x)
9…a6 — 4.7% (37 parties)
Ambassadeurs : Fuller, John (1x), Diez del Corral, Jesus (1x), Anderson, Frank Ross (1x), Stadt, Hans (1x), Jahnichen, E. (1x), Kropp, Volker (1x), Esser, Peter, Dr. (1x), Steinhart, Christoph (1x)
9…Qb6+ — 2.4% (19 parties)
Ambassadeurs : Suhobeck, Alex H (1x), Burger, Karl (1x), Hlavac, Rudolf (1x), Paukert, Martin (1x), Andarte Rosillo, Carlos Eduardo (1x), Lapena Bayo, Cosme (1x), Cheski, Joanna (1x), Margold, John (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 9…a5 9…exf4 9…a6 9…Qb6+
<1800 25 68% 12% — 12%
1800-2200 292 71% 15% 8% 2%
2200-2600 339 82% 14% 2% 1%
2600+ 3 100% — — —
Évolution par décennie (% des parties)
Décennie N parties 9…a5 9…exf4 9…a6 9…Qb6+
1950s 39 90% — 5% 3%
1960s 6 67% 17% — —
1970s 40 85% 5% 5% 2%
1980s 75 84% 13% 3% —
1990s 195 73% 16% 4% 3%
2000s 242 76% 15% 4% 2%
2010s 161 71% 14% 8% 3%
2020s 30 87% 3% 3% —
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
9…a5 71% 87% ▲ +15.9%
9…exf4 14% 3% ▼ -10.3%
9…a6 8% 3% ▼ -4.7%
9…Qb6+ 3% 0% ▼ -3.1%
Joueurs célèbres
Champions du monde dans cette position
Kasparov, Garry — 3 parties
Tal, Mikhail — 2 parties
Parties historiques
9…a5 — 76.4% (602 parties)
1950 — Paoli, Enrico vs Baldanello, Mario — 1-0 — ?
1950 — Khasin, Abram vs Kopilov, Nikolay Georgiyevich — 1/2-1/2 — Leningard
1950 — Bisguier, Arthur B vs Ivkov, Borislav — 1/2-1/2 — USA
1950 — Staudte, Hans-Hilmar vs Unzicker, Ferdinand, Dr. — 0-1 — FRG-ch Bad Pyrmont GER
1950 — Paoli, Alessio Matteo vs Baldanello — 1-0 — Venice ITA
9…exf4 — 13.3% (105 parties)
1964 — Bouna, Safwan younes vs Delon, Ilia Nick — 1-0 — Tel Aviv ISR
1972 — Tabor, Jozsef vs Paoli, Enrico — 1-0 — Toth mem Kecskemet HUN
1979 — Jarzynski, Andrzej vs Tischbierek, Raj — 0-1 — Bratislava SVK
1982 — Cocozza, Mario vs Reyes Najera, Carlos A. — 1/2-1/2 — Lucerne SUI
1983 — Atanasov, Petko vs Inkiov, Ventzislav — 1/2-1/2 — Varna BUL
9…a6 — 4.7% (37 parties)
1955 — Fuller, John vs Diez del Corral, Jesus — 0-1 — Hastings ENG
1956 — Anderson, Frank Ross vs Stadt, Hans — 1-0 — Toronto CAN
1971 — Polgar, Istvan vs Cobo Arteaga, Eldis — 1/2-1/2 — Baja
1979 — Ozaki, Yukitaka vs Saeed, Saeed-Ahmed — 0-1 — Singapore SIN
1987 — Jahnichen, E. vs Kropp, Volker — 0-1 — Mainz
9…Qb6+ — 2.4% (19 parties)
1955 — Suhobeck, Alex H vs Burger, Karl — 1/2-1/2 — Long Beach, CA USA
1978 — Hlavac, Rudolf vs Paukert, Martin — 1-0 — Bohutin (1
1990 — Wuts, Frank vs Harwar, Julie A — 1/2-1/2 — Sas van Gent NED
1993 — Murphy, Richard vs Nagy, Abdel Fatah — 1-0 — Szombathely
1993 — Kuehn, David vs Azimi, Reza — 1/2-1/2 — Cologne GER