D29e - 9.a4 Nbd7 - QGA: Classical (1933)

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D29e — QGA: Classical (1933)
1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2 b5 8.Bb3 Bb7 9.a4 Nbd7
Les coups candidats
10.axb5 — 52.9% (171 parties)
Ambassadeurs : Uhlmann, Wolfgang (7x), Golz, Werner (5x), Jussupow, Artur (3x), Huebner, Robert (3x), Schrancz, Istvan (3x), Raetsky, Alexander (3x), Krallmann, Matthias (3x), Fuchs, Reinhart (2x)
Ambassadeurs : Vaulin, Alexander P. (2x), Ac, Michal (2x), Bialas, Wolfram (2x), Bachmann, Karlheinz (2x), Jaracz, Pawel (2x), Saigin, Vladimir (1x), Ivanov, Vladimir (1x), Hottes, Dieter (1x)
10.Nbd2 — 11.1% (36 parties)
Ambassadeurs : Hempson, Peter W (2x), Michiels, Bart (2x), Uneklint, U. (1x), Samuelsson Stefan (1x), Hodakowsky, Georg (1x), Rickers, Gerd (1x), Clarke, Peter (1x), Afizov, Marsel (1x)
10.e4 — 1.9% (6 parties)
Ambassadeurs : Mello, Jose Benicio (1x), Rocha, Antonio (1x), Kotov, Alexander (1x), Flohr, Salo (1x), Petrosian, Tigran V. (1x), Smyslov, Vasily (1x), Piket, Jeroen (1x), Seirawan, Yasser (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 10.axb5 10.Rd1 10.Nbd2 10.e4
<1800 4 50% 25% 25% —
1800-2200 58 36% 38% 21% 2%
2200-2600 188 51% 33% 11% 1%
2600+ 12 83% 17% — —
Évolution par décennie (% des parties)
Décennie N parties 10.axb5 10.Rd1 10.Nbd2 10.e4
1950s 18 56% 28% — 11%
1960s 29 52% 28% 14% 3%
1970s 5 100% — — —
1980s 18 67% 28% 6% —
1990s 104 72% 19% 3% 1%
2000s 80 49% 35% 10% 2%
2010s 55 20% 42% 33% —
2020s 14 29% 57% 14% —
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
10.axb5 20% 29% ▲ +8.6%
10.Rd1 42% 57% ▲ +15.3%
10.Nbd2 33% 14% ▼ -18.4%
10.e4 0% 0% +0.0%
Joueurs célèbres
Champions du monde dans cette position
Anand, Viswanathan — 2 parties
Kramnik, Vladimir — 1 partie
Parties historiques
10.axb5 — 52.9% (171 parties)
1951 — Kopilov, Nikolay Georgiyevich vs Flohr, Salo — 1/2-1/2 — Moscow RUS
1951 — Suetin, Alexey S vs Alatortsev, Vladimir N. — 1-0 — Leningrad RUS
1952 — Florian, Tibor vs Pilnik, Herman — 1/2-1/2 — Helsinki olm
1953 — Miguel, Nahuel vs Rapaka Samuel Paul — 1/2-1/2 — Buenos Aires ARG
1957 — Uhlmann, Wolfgang vs Stahlberg, Gideon — 1-0 — Wageningen zt
10.Rd1 — 30.0% (97 parties)
1950 — Bondarevsky, Igor vs Alatortsev, Vladimir N. — 0-1 — Moscow RUS
1951 — Kapu, Jeno vs Borloy, Karoly — 1/2-1/2 — Hungary ch
1952 — Gruenfeld, Ernst vs O'Kelly, Albéric de Galway — 1/2-1/2 — Belgrade SRB
1955 — Ilivitsky, Georgy A vs Petrosian, Tigran V. — 1/2-1/2 — Moskou ch-URS
1957 — Taimanov, Mark vs Stoliar, Efim Samoilovich — 1/2-1/2 — Leningrad RUS
10.Nbd2 — 11.1% (36 parties)
1962 — Afizov, Marsel vs Fichtl, Jiri — 1/2-1/2 — Jablonec
1966 — Hodakowsky, Georg vs Rickers, Gerd — 1-0 — Heilbronn
1969 — Uneklint, U. vs Samuelsson Stefan — 0-1 — corr Sweden
1969 — Hempson, Peter W vs Clarke, Peter — 0-1 — Rhyl ch-BCF
1988 — Hernandez Onna, Roman vs Barua, Dibyendu — 1/2-1/2 — It Koyenko Calicut IND
10.e4 — 1.9% (6 parties)
1950 — Kotov, Alexander vs Flohr, Salo — 1-0 — Budapest HUN
1950 — Petrosian, Tigran V. vs Smyslov, Vasily — 1/2-1/2 — Moskou ch-URS
1964 — Mello, Jose Benicio vs Rocha, Antonio — 0-1 — Brasilia BRA
1994 — Piket, Jeroen vs Seirawan, Yasser — 0-1 — Monte Carlo MNC
2002 — Mayer, Johann vs Dopper, Johan C — 1/2-1/2 — ICCF Email