D29h - 9.Rd1 Nbd7 10.a4 - QGA: Classical (1937)

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D29h — QGA: Classical (1937)
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.Rd1 Nbd7 10.a4
Les coups candidats
Ambassadeurs : Simacek, Pavel (2x), Incutto, Carlos (1x), Bartis, Gustavo (1x), Faleg, Alberto (1x), Abhishek Mari S (1x), Gruenfeld, Ernst (1x), O'Kelly, Albéric de Galway (1x), Moskowitz, Jack (1x)
10…Qb6 — 21.2% (60 parties)
Ambassadeurs : Pilnik, Herman (2x), Kakageldyev, Amanmurad (2x), Bialas, Wolfram (2x), Hottes, Dieter (1x), Bachmann, Karlheinz (1x), Gerusel, Mathias (1x), Wexler, Bernardo (1x), Fuchs, Reinhart (1x)
10…Qb8 — 20.8% (59 parties)
Ambassadeurs : Baburin, Alexander (4x), Vaulin, Alexander P. (2x), Burmakin, Vladimir (2x), Jaracz, Pawel (2x), Evans, Larry (1x), Sherwin, James T (1x), Sunye Neto, Jaime (1x), Kuligowski, Adam (1x)
10…Be7 — 15.5% (44 parties)
Ambassadeurs : Krallmann, Matthias (3x), Ivanov, Vladimir (2x), Ac, Michal (2x), Saigin, Vladimir (1x), Taimanov, Mark (1x), Stoliar, Efim Samoilovich (1x), Olafsson, Fridrik (1x), Keres, Paul (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 10…b4 10…Qb6 10…Qb8 10…Be7
<1800 5 20% 40% — —
1800-2200 74 30% 23% 24% 8%
2200-2600 164 30% 20% 23% 15%
2600+ 3 — — 33% —
Évolution par décennie (% des parties)
Décennie N parties 10…b4 10…Qb6 10…Qb8 10…Be7
1950s 13 23% — — 69%
1960s 12 8% 33% 8% 33%
1970s 7 29% 57% — —
1980s 11 18% 27% 18% 18%
1990s 62 21% 29% 19% 21%
2000s 88 31% 20% 26% 7%
2010s 64 33% 14% 30% 11%
2020s 26 38% 15% 8% 12%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
10…b4 33% 38% ▲ +5.6%
10…Qb6 14% 15% ▲ +1.3%
10…Qb8 30% 8% ▼ -22.0%
10…Be7 11% 12% ▲ +0.6%
Parties historiques
10…b4 — 27.9% (79 parties)
1952 — Incutto, Carlos vs Bartis, Gustavo — 0-1 — Buenos Aires ARG
1952 — Gruenfeld, Ernst vs O'Kelly, Albéric de Galway — 1/2-1/2 — Belgrade SRB
1954 — Moskowitz, Jack vs Amand, Harry — 1/2-1/2 — Hollywood
1962 — Faleg, Alberto vs Abhishek Mari S — 0-1 — Belgrade SRB
1972 — Debarnot, Roberto vs Padevsky, Nikola — 1/2-1/2 — Skopje ol (Men) fin-A
10…Qb6 — 21.2% (60 parties)
1960 — Wexler, Bernardo vs Fuchs, Reinhart — 0-1 — Leipzig olm
1961 — Rejfir, Josef vs Filip, Miroslav — 0-1 — Kosice
1962 — Hottes, Dieter vs Bachmann, Karlheinz — 1/2-1/2 — It Bamberg GER
1963 — Gerusel, Mathias vs Bialas, Wolfram — 1/2-1/2 — Bad Pyrmont GER
1970 — Brond, Victor vs Pilnik, Herman — 0-1 — Miramar
10…Qb8 — 20.8% (59 parties)
1962 — Evans, Larry vs Sherwin, James T — 1-0 — New York ch-USA
1986 — Sunye Neto, Jaime vs Kuligowski, Adam — 0-1 — Brussels BEL
1986 — Pirttimaki, Timo vs Kivisto, Mikko — 1/2-1/2 — Jarvenpaa FIN
1992 — Schleining, Zoya vs Baburin, Alexander — 0-1 — Helsinki open
1992 — Loeffler, Stefan vs Yakovich, Yuri — 1/2-1/2 — Munich GER
10…Be7 — 15.5% (44 parties)
1950 — Bondarevsky, Igor vs Alatortsev, Vladimir N. — 0-1 — Moscow RUS
1951 — Novotelnov, Nikolai vs Flohr, Salo — 1-0 — Moskou ch-URS
1955 — Ilivitsky, Georgy A vs Petrosian, Tigran V. — 1/2-1/2 — Moskou ch-URS
1956 — Porath, Yosef vs Wade, Robert G — 1/2-1/2 — Moscow RUS
1956 — Szilagyi, Gyorgy Laszlo vs Uhlmann, Wolfgang — 1-0 — Marianske Lazne