D34d - 9.b3 - QGD Tarrasch (1922)

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D34d — QGD Tarrasch (1922)
1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O O-O 9.b3
Les coups candidats
Ambassadeurs : Uhlmann, Wolfgang (19x), Espig, Lutz (10x), Marjanovic, Slavoljub (8x), Weyerstrass, Ronald (8x), Frey Beckman, Kenneth (7x), Banas, Jan (6x), Heinig, Wolfram, Dr. (5x), Ermenkov, Evgenij (4x)
9…Bg4 — 16.7% (264 parties)
Ambassadeurs : Espig, Lutz (6x), Magomedov, Magaram (5x), Timman, Jan H (4x), Uhlmann, Wolfgang (4x), Flueckiger, Christian (3x), Gorelov, Sergey G (2x), Zuk, Robert D. (2x), Hill, Alan (2x)
9…Re8 — 9.9% (156 parties)
Ambassadeurs : Zolnierowicz, Krzysztof (8x), Petursson, Margeir (5x), Liverios, Thisefs (3x), Inkiov, Ventzislav (3x), Hjartarson, Johann (2x), Uhlmann, Wolfgang (2x), Bozek, Adam (2x), Bischoff, Klaus (2x)
9…Be6 — 4.8% (76 parties)
Ambassadeurs : Dietze, Wolfgang, Dr. (5x), Iskov, Gert (1x), Westerinen, Heikki M.J. (1x), Sulava, Nenad (1x), Kovacevic, Damir (1x), Tichy, Vladimir (1x), Bakheet Farag (1x), Kollberg, Lothar (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 9…Ne4 9…Bg4 9…Re8 9…Be6
<1800 37 19% 14% 16% 16%
1800-2200 505 51% 16% 12% 8%
2200-2600 869 66% 18% 8% 3%
2600+ 4 75% — 25% —
Évolution par décennie (% des parties)
Décennie N parties 9…Ne4 9…Bg4 9…Re8 9…Be6
1950s 2 50% — — —
1960s 3 100% — — —
1970s 124 71% 11% 6% 6%
1980s 232 66% 19% 10% 1%
1990s 348 67% 16% 9% 2%
2000s 389 56% 17% 8% 7%
2010s 376 48% 17% 16% 7%
2020s 103 57% 17% 2% 7%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
9…Ne4 48% 57% ▲ +8.9%
9…Bg4 17% 17% ▼ -0.8%
9…Re8 16% 2% ▼ -14.3%
9…Be6 7% 7% -0.1%
Joueurs célèbres
Champions du monde dans cette position
Kasparov, Garry — 1 partie
Parties historiques
9…Ne4 — 59.3% (935 parties)
1954 — Bauza, Lorenzo vs Benko, Francisco — 1/2-1/2 — Mar del Plata ARG
1960 — Seleznev, Valentin vs Yudovich, Mikhail Jr — 0-1 — Perm RUS
1967 — Redolfi, Argentino Rodolfo vs Bronstein, Luis Marcos — 1-0 — Cordoba ARG
1969 — Panno, Oscar vs Parma, Bruno — 1-0 — Palma de Majorca ESP
1970 — Uhlmann, Wolfgang vs Spassky, Boris Vasily — 1/2-1/2 — Siegen olm prel
9…Bg4 — 16.7% (264 parties)
1971 — Hartoch, Robert G vs Denker, Arnold S — 1-0 — Wijk aan Zee NED
1971 — Liebert, Heinz vs Baumbach, Friedrich, Dr. — 1/2-1/2 — Strasbourg ch20-DDR
1972 — Zuk, Robert D. vs Hill, Alan — 1-0 — Vancouver BC CAN
1972 — Macskasy, Elod vs Hill, Alan — 1/2-1/2 — Vancouver BC CAN
1973 — Timman, Jan H vs Keres, Paul Petrovich — 1/2-1/2 — Tallinn EST
9…Re8 — 9.9% (156 parties)
1970 — Garcia R., Luis Ernesto vs Schweber, Samuel — 0-1 — Mar del Plata ARG
1976 — Uhlmann, Wolfgang vs Espig, Lutz — 1-0 — Groeditz
1976 — Spiridonov, Nikola vs Espig, Lutz — 1/2-1/2 — Halle GER
1977 — A Janki Rao vs Berry, Jonathan — 1/2-1/2 — Toronto CAN
1977 — Weyerstrass, Ronald vs Bernink, Dennis Bernardus Kwang-Seok — 1-0 — Velp op ch-NLD
9…Be6 — 4.8% (76 parties)
1972 — Ruehlemann, Siegfried vs Mueller, Klaus Uwe — 0-1 — Krumpa
1975 — Bakheet Farag vs Dietze, Wolfgang, Dr. — 1/2-1/2 — Rimavska Sobota SVK
1976 — Uhlmann, Wolfgang vs Dietze, Wolfgang, Dr. — 1-0 — Groeditz GER
1977 — Tichy, Vladimir vs Dietze, Wolfgang, Dr. — 1/2-1/2 — Prague CZE
1977 — Kollberg, Lothar vs Dietze, Wolfgang, Dr. — 1/2-1/2 — Frankfurt/Oder