C81a - 9.Qe2 - Open Keres Attack

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C81a — Open Keres Attack
1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.Qe2
Eval: [+0.16]
Les coups candidats
Ambassadeurs : ? (16x), Matulovic, Milan (16x), Jansa, Vlastimil (16x), Timman, Jan H (13x), Buj, Pablo (10x), Donner, Jan-Hein (9x), Korchnoi, Viktor (9x), Boleslavsky, Isaac (8x)
Ambassadeurs : Grivas, Efstratios (11x), Simacek, Pavel (7x), Lombart, Philippe (7x), Honfi, Karoly (5x), Honfi, K. (5x), Sobeck, Guenter (5x), ? (5x), Anderson, Frank Ross (4x)
9…Nc5 — 13.0% (342 parties)
Ambassadeurs : Anderson, Frank Ross (9x), Ujtumen, Tudev (9x), Unzicker, Wolfgang (8x), Mamedyarov, Shakhriyar (5x), Girya, Olga (5x), Smyslov, Vladimir (4x), German, Eugenio (4x), Keres, Paul (3x)
9…Na5 — 3.7% (98 parties)
Ambassadeurs : Abrahams, Gerald (2x), Estrada Degrandi, Walter (2x), Bohatyrchuk, Fedir Parfenovych (2x), Neubert, Gerhard (2x), Juricek, Stanislav (2x), Adam, Edmund (1x), Seibold, Matthaus (1x), Malmgren, Harald (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 9…Be7 9…Bc5 9…Nc5 9…Na5
<1800 33 61% 27% 12% —
1800-2200 473 66% 18% 10% 5%
2200-2600 852 71% 15% 12% 1%
2600+ 85 68% 6% 26% —
Évolution par décennie (% des parties)
Décennie N parties 9…Be7 9…Bc5 9…Nc5 9…Na5
1900s 2 100% — — —
1930s 3 67% — — 33%
1940s 47 30% 11% 32% 21%
1950s 190 45% 13% 32% 9%
1960s 255 61% 18% 16% 4%
1970s 376 76% 10% 9% 4%
1980s 356 81% 10% 6% 2%
1990s 401 74% 18% 4% 3%
2000s 305 69% 21% 8% 3%
2010s 411 65% 16% 14% 3%
2020s 293 65% 9% 25% 1%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
9…Be7 65% 65% ▼ -0.6%
9…Bc5 16% 9% ▼ -7.2%
9…Nc5 14% 25% ▲ +11.6%
9…Na5 3% 1% ▼ -2.7%
Joueurs célèbres
Champions du monde dans cette position
Euwe, Max — 7 parties
Tal, Mikhail — 6 parties
Smyslov, Vladimir — 5 parties
Carlsen, Magnus — 4 parties
Karpov, Anatoly — 2 parties
Kasparov, Garry — 1 partie
Kramnik, Vladimir — 1 partie
Ding, Liren — 1 partie
Anand, Viswanathan — 1 partie
Gukesh D — 1 partie
Parties historiques
9…Be7 — 68.1% (1797 parties)
1903 — Lebedev, Sergey F vs Rabinovich, Abram — 1-0 — Kiev 3rd Russian ch
1903 — Izbinsky, Stefan vs Rubinstein, Akiba — 0-1 — Kiev UKR
1937 — Bauer, Randy vs Chalupetzky — 1/2-1/2 — corresp.
1939 — Adam, Edmund vs Malmgren, Harald — 1/2-1/2 — ?
1940 — Malmgren, Harald vs Brynhammar Hilding — 1-0 — ?
9…Bc5 — 14.4% (380 parties)
1947 — Sahlmann, Walter vs Roedl, Ludwig — 0-1 — Weidenau
1948 — Pilnik, Herman vs Garcia Balado L — 1-0 — Buenos Aires/La Plata
1949 — Aitken, James vs Durham, Daniel — 1-0 — London ENG
1949 — Znosko-Borovsky, Eugene vs Unzicker, Wolfgang — 0-1 — Lucerne SUI
1949 — Ivkov, Borislav vs Fuderer, Andrija — 0-1 — Yugoslavia
9…Nc5 — 13.0% (342 parties)
1946 — Stoltz, Gösta vs Cortlever, Nico — 1/2-1/2 — Zaandam
1947 — Gray, Sydney vs Anderson, Frank Ross — 0-1 — Toronto CAN
1947 — De Carbonnel, Heinz vs Unzicker, Wolfgang — 0-1 — Munich GER
1947 — Smyslov, Vladimir vs Sokolsky, Alexey — 1-0 — Moscow Chigorin mem
1947 — Keres, Paul vs Alatortsev, Vladimir N. — 1-0 — Leningrad ch-URS
9…Na5 — 3.7% (98 parties)
1938 — Adam, Edmund vs Seibold, Matthaus — 1-0 — corr 1938-39
1940 — Malmgren, Harald vs Gavelin, Knuth — 1-0 — ?
1940 — Kohler Rosa, Tony Denis vs Gilg, Karl — 1-0 — Krakow POL
1947 — Tomovic, Vasilje vs Bozic, Aleksandar — 1-0 — Yugoslavia
1948 — Alexander, Conol Hugh vs Abrahams, Gerald — 1-0 — London, Bishopsgate