D19a - 9…* - Czech Variation, Classical System, Main Line (1934)

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D19a — Czech Variation, Classical System, Main Line (1934)
1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.e3 e6 7.Bxc4 Bb4 8.O-O O-O 9.Qe2
Les coups candidats
Ambassadeurs : Dolgov, Igor (20x), Velikov, Petar (9x), Hajnal, Zoltan (9x), Uhlmann, Wolfgang (8x), Smyslov, Vasily (7x), Loureiro, Luiz Vasconcellos (7x), Barua, Dibyendu (7x), ? (7x)
Ambassadeurs : Peralta, Fernando (12x), Felgaer, Ruben (8x), Jones, Richard S. (8x), Milov, Leonid (7x), Marez, Sebastien (7x), Packroff, Hermann (7x), Harestad, Hans Krogh (7x), Van Wely, Loek (7x)
Ambassadeurs : Varga, Peter (18x), Hennings, Artur (11x), Ros, Aksel (8x), Svetushkin, Dmitry (8x), Tomcsanyi, Peter (6x), Koczo, Kristof (6x), Lopez Linares, Lizandro Fernando (6x), Barczay, Laszlo (4x)
Ambassadeurs : Campora, Daniel H. (10x), Formanek, Edward (5x), Van Wely, Loek (5x), Mostbauer, Florian (5x), Bonin, Jay (4x), Bolbochan, Jacobo (3x), Oll, Lembit (3x), Nielsen, Axel (2x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 9…Nbd7 9…Bg6 9…Bg4 9…Ne4
<1800 192 54% 19% 11% 7%
1800-2200 1858 45% 28% 13% 8%
2200-2600 2138 40% 36% 12% 10%
2600+ 113 31% 43% 5% 18%
Évolution par décennie (% des parties)
Décennie N parties 9…Nbd7 9…Bg6 9…Bg4 9…Ne4
1950s 125 43% 5% 35% 12%
1960s 78 49% 3% 31% 10%
1970s 100 52% 6% 26% 11%
1980s 183 69% 7% 9% 11%
1990s 688 44% 26% 12% 14%
2000s 1554 42% 35% 10% 10%
2010s 1841 47% 25% 15% 7%
2020s 420 25% 60% 4% 6%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
9…Nbd7 47% 25% ▼ -21.3%
9…Bg6 25% 60% ▲ +34.6%
9…Bg4 15% 4% ▼ -11.8%
9…Ne4 7% 6% ▼ -0.8%
Joueurs célèbres
Champions du monde dans cette position
Kramnik, Vladimir — 4 parties
Anand, Viswanathan — 4 parties
Kasparov, Garry — 3 parties
Karpov, Anatoly — 2 parties
Ju, Wenjun — 2 parties
Capablanca, Jose Raul — 1 partie
Smyslov, Vladimir — 1 partie
Carlsen, Magnus — 1 partie
Hou, Yifan — 1 partie
Parties historiques
9…Nbd7 — 43.9% (2190 parties)
1950 — Keller-Hermann, Edith vs Langos, Jozsa — 1/2-1/2 — Moscow RUS
1951 — Sherwin, James T vs McCormick, Edgar T — 1-0 — USA-op52 Forth Worth
1951 — Sandrin, Albert vs Cross, James — 1-0 — Forth Worth
1951 — Evans, Larry vs McCormick, Edgar T — 1-0 — Forth Worth
1951 — Fox, Maurice vs Hayes, Rea B — 1-0 — Vancouver
9…Bg6 — 29.2% (1459 parties)
1953 — Olafsson, Fridrik vs Tartakower, Savielly — 1-0 — Hastings ENG
1954 — Mititelu, Gheorghe vs Alexandrescu, Bogdan-Gabriel — 0-1 — RUM ch
1954 — Alster, Ladislav vs Al Husari, Zita Fatima — 1-0 — Prague CZE
1958 — Cretulescu vs Alexandrescu, Gheorghe — 0-1 — Sinaia
1958 — Minev, Nikolay N vs Kolarov, Atanas S. — 0-1 — ?
9…Bg4 — 12.9% (646 parties)
1950 — Solana, Robert vs Martin, Raymond — 1-0 — Los Angeles, CA USA
1950 — Vajda, Arpad vs Florian, Tibor — 1/2-1/2 — Budapest HUN
1950 — Rossetto, Hector vs Maderna, Carlos — 1-0 — Mar del Plata ARG
1950 — Gereben, Erno vs Fuster, Geza — 1-0 — Budapest HUN
1950 — Olafsson, Fridrik vs Pritchard, Barrymore Arthur — 1-0 — Birmingham ENG
9…Ne4 — 9.2% (461 parties)
1950 — Petrosian, Tigran A. vs Levenfish, Grigory — 1-0 — Gorki
1950 — Lachmann, Hans G vs Hantke, Rolf — 0-1 — Bielefeld
1950 — Mitchell, Graham vs Van't Veer, P. — 1-0 — corr Wch1
1950 — Viaud, Adolphe vs Mitchell, Graham — 0-1 — corr Wch1
1951 — Niephaus, Walter vs Nuernberg, Friedrich — 1/2-1/2 — Augsburg GER