D28h - 8.Bb3 - QGA: Classical (1934)

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D28h — QGA: Classical (1934)
1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2 b5 8.Bb3
Les coups candidats
Ambassadeurs : Garcia Palermo, Carlos Horacio (14x), Suetin, Alexey S (10x), Krallmann, Matthias (10x), Burmakin, Vladimir (9x), Golz, Werner (8x), Uhlmann, Wolfgang (8x), Sasikiran, Krishnan (8x), Clarke, Peter (7x)
Ambassadeurs : Evans, Larry (2x), Spiller, Arthur R (1x), Albert, Gerhard (1x), Stenborg, Ake (1x), Partyka, Kazimierz (1x), Spassky, Boris V. (1x), Kots, Yuri I (1x), Steiner, Herman (1x)
8…Nbd7 — 1.8% (33 parties)
Ambassadeurs : Borges Matos, Juan (2x), Koblencs, Alexander (1x), Klovans, Janis (1x), Zuidema, Coen (1x), Gheorghiu, Florin (1x), Alexander, Ken R D (1x), Roiter, Andrey V (1x), Kierzek, Matthias, Dr. (1x)
8…c4 — 1.4% (25 parties)
Ambassadeurs : Perez Garcia, Jose Miguel 1981 (2x), Albiolo, Tommaso (1x), Agam Singh Nagra (1x), Martin, Robert Bryan (1x), Craib, Bruce (1x), Colias, Billy (1x), Cohen, Lawrence (1x), Szeberenyi, Adam (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 8…Bb7 8…Nc6 8…Nbd7 8…c4
<1800 56 86% 7% 2% —
1800-2200 434 89% 2% 2% 3%
2200-2600 836 94% 2% 2% 1%
2600+ 28 100% — — —
Évolution par décennie (% des parties)
Décennie N parties 8…Bb7 8…Nc6 8…Nbd7 8…c4
1950s 72 89% 7% 1% —
1960s 129 93% 2% 3% 1%
1970s 42 90% 5% — 2%
1980s 217 94% 3% 0% 0%
1990s 574 95% 2% 2% 1%
2000s 457 91% 3% 2% 2%
2010s 257 90% 2% 3% 3%
2020s 62 84% 2% 5% 3%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
8…Bb7 90% 84% ▼ -6.0%
8…Nc6 2% 2% -0.3%
8…Nbd7 3% 5% ▲ +2.1%
8…c4 3% 3% ▲ +0.5%
Joueurs célèbres
Champions du monde dans cette position
Anand, Viswanathan — 5 parties
Parties historiques
8…Bb7 — 92.4% (1672 parties)
1950 — Bolbochan, Julio vs Devos, Paul — 1-0 — Dubrovnik CRO
1950 — Honan, N. vs Akonde Marshall — 1-0 — England
1950 — Smyslov, Vasily vs Keres, Paul Petrovich — 1/2-1/2 — Budapest HUN
1950 — Winter, William vs Newman, Richard — 1-0 — Buxton
1950 — Bondarevsky, Igor vs Alatortsev, Vladimir N. — 0-1 — Moscow RUS
8…Nc6 — 2.5% (46 parties)
1951 — O'Kelly, Albéric de Galway vs Evans, Larry — 1/2-1/2 — New York, NY USA
1952 — Steiner, Herman vs Evans, Larry — 0-1 — USA
1954 — Bartuszat, Fritz vs Kuhn, Paul — 0-1 — Meerane
1957 — Stenborg, Ake vs Partyka, Kazimierz — 1-0 — Dublin zt
1957 — Weinstein, Raymond vs McCormick, Alan — 1-0 — New York, NY USA
8…Nbd7 — 1.8% (33 parties)
1958 — Alexander, Ken R D vs Roiter, Andrey V — 1/2-1/2 — ?
1961 — Zuidema, Coen vs Gheorghiu, Florin — 0-1 — The Hague NED
1962 — Koblencs, Alexander vs Klovans, Janis — 1/2-1/2 — Riga LAT
1962 — Beni, Alfred vs Fichtl, Jiri — 1-0 — Berlin East
1968 — Kierzek, Matthias, Dr. vs Federau, Juergen — 0-1 — Saarbruecken
8…c4 — 1.4% (25 parties)
1965 — Albiolo, Tommaso vs Agam Singh Nagra — 1-0 — corr Italy
1975 — Martin, Robert Bryan vs Craib, Bruce — 1-0 — Montreal CAN
1989 — Colias, Billy vs Cohen, Lawrence — 1/2-1/2 — Peoria
1994 — Diaz Ponce, Angel vs Salgado Gonzalez, Julio — 1/2-1/2 — Orense
1996 — Roeder, Matthias vs Van Damme, Henri — 1-0 — Brussels Tch-BEL