D28g - 7…b5 8.Bd3 cxd4 9.exd4 - QGA: Classical (1945)

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D28g — Classical
1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2 b5 8.Bd3 cxd4 9.exd4
Les coups candidats
9…Be7 — 60.5% (222 parties)
Ambassadeurs : Neverov, Valeriy (7x), Rublevsky, Sergei (6x), Golz, Werner (4x), Borisenko, Georgy K (3x), Kaidanov, Gregory (3x), Baburin, Alexander (3x), Laghetti, Gaetano (3x), Reshevsky, Samuel (2x)
9…Bb7 — 24.8% (91 parties)
Ambassadeurs : Keres, Paul (5x), Reshevsky, Samuel (3x), Turner, Abe J (3x), Szily, Jozsef (2x), Furman, Semyon (2x), Rashkovsky, Nukhim N (2x), Graf, Rena (2x), Grayland, Stan J (2x)
9…Nc6 — 14.2% (52 parties)
Ambassadeurs : Kupreichik, Viktor D (3x), Rashkovsky, Nukhim N (2x), Garcia Palermo, Carlos Horacio (2x), Trevis, Robert (2x), Geller, Efim P. (1x), Alatortsev, Vladimir N. (1x), Vistaneckis, Isakas (1x), Maslov, Leonid P (1x)
9…Nbd7 — 0.5% (2 parties)
Ambassadeurs : Menas, Borel (1x), Dahl, Peter (1x), Marinelli, Tullio (1x), Lantini, Marco (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 9…Be7 9…Bb7 9…Nc6 9…Nbd7
<1800 7 29% 43% 29% —
1800-2200 67 60% 28% 12% —
2200-2600 206 64% 21% 15% 0%
2600+ 11 91% — 9% —
Évolution par décennie (% des parties)
Décennie N parties 9…Be7 9…Bb7 9…Nc6 9…Nbd7
1930s 3 33% 67% — —
1940s 1 — 100% — —
1950s 14 14% 64% 21% —
1960s 19 74% 21% 5% —
1970s 5 40% 20% 20% 20%
1980s 45 47% 38% 16% —
1990s 78 64% 14% 21% 1%
2000s 94 67% 16% 17% —
2010s 93 66% 28% 6% —
2020s 15 53% 33% 13% —
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
9…Be7 66% 53% ▼ -12.3%
9…Bb7 28% 33% ▲ +5.4%
9…Nc6 6% 13% ▲ +6.9%
9…Nbd7 0% 0% +0.0%
Joueurs célèbres
Champions du monde dans cette position
Lasker, Emanuel — 1 partie
Euwe, Max — 1 partie
Tal, Mikhail — 1 partie
Parties historiques
9…Be7 — 60.5% (222 parties)
1936 — Lasker, Emanuel vs Reshevsky, Samuel — 1-0 — Nottingham IT
1956 — Bertholdt, Dieter vs Golz, Werner — 1-0 — Leipzig ch GDR
1959 — Kjellander, Sven Erik Gunnar vs Endzelins, Lucius — 1/2-1/2 — corr Wch3
1960 — Grechkin, Dmitry M vs Borisenko, Georgy K — 1/2-1/2 — USSR ch-05 6063
1960 — Bisguier, Arthur B vs Golz, Werner — 1-0 — Leipzig GER
9…Bb7 — 24.8% (91 parties)
1937 — Landau, Salo vs Reshevsky, Samuel — 1-0 — It Kemeri LAT
1937 — Burillo Landau, Dante Ramon vs Reshevsky, Samuel — 0-1 — ?
1945 — Euwe, Max vs Devos, Paul — 1-0 — Hastings ENG
1952 — Barcza, Gedeon vs Keres, Paul — 0-1 — Budapest HUN
1955 — Shocron, Ruben vs Dodero, Emilio — 1-0 — Buenos Aires ARG
9…Nc6 — 14.2% (52 parties)
1950 — Geller, Efim P. vs Alatortsev, Vladimir N. — 1/2-1/2 — Moskou ch-URS
1952 — Bozic, Aleksandar vs Vukovic, Sava — 1/2-1/2 — Belgrade SRB
1958 — Szabo, Ladislav vs Pilnik, Herman — 1-0 — Munchen olm
1961 — Vistaneckis, Isakas vs Maslov, Leonid P — 1/2-1/2 — Palanga
1978 — Hanko, Pavel vs Schrancz, Istvan — 0-1 — Prievidza SVK
9…Nbd7 — 0.5% (2 parties)
1970 — Menas, Borel vs Dahl, Peter — 0-1 — No. California
1990 — Marinelli, Tullio vs Lantini, Marco — 1-0 — San Benedetto