C81a - 9…* - Open, Howell Attack (1940)

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C81a — Open, Howell Attack (1940)
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
Les coups candidats
Ambassadeurs : Matulovic, Milan (16x), Jansa, Vlastimil (16x), Timman, Jan H (13x), ? (10x), Korchnoi, Viktor (9x), Donner, Jan-Hein (8x), Kavalek, Lubomir (8x), Buj, Pablo (8x)
Ambassadeurs : Honfi, Karoly (10x), Grivas, Efstratios (10x), Lombart, Philippe (7x), Anderson, Frank Ross (5x), ? (5x), Simacek, Pavel (5x), Sobeck, Guenter (4x), Abanin, Vladimir (4x)
9…Nc5 — 12.7% (332 parties)
Ambassadeurs : Ujtumen, Tudev (9x), Anderson, Frank Ross (8x), German, Eugenio (4x), Myagmarsuren, Lkhamsuren (4x), Palermo, Vicente (4x), Girya, Olga (4x), Siemms, Ross E (3x), Jansa, Vlastimil (3x)
9…Na5 — 3.4% (89 parties)
Ambassadeurs : Bohatyrchuk, Fedir Parfenovych (2x), Neubert, Gerhard (2x), Janik, Stanislav (2x), Kampman, Tijmen (1x), Illgen, Hans (1x), Mazzoni, Guido (1x), Gardais Philippe (1x), Hammar, Bengt (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 80 62% 20% 10% 8%
1800-2200 610 67% 18% 10% 4%
2200-2600 848 71% 15% 12% 1%
2600+ 72 71% 6% 24% —
Évolution par décennie (% des parties)
Décennie N parties 9…Be7 9…Bc5 9…Nc5 9…Na5
1950s 186 44% 13% 32% 10%
1960s 253 61% 18% 17% 4%
1970s 375 75% 10% 10% 4%
1980s 355 81% 10% 6% 2%
1990s 403 74% 19% 4% 3%
2000s 307 69% 21% 7% 3%
2010s 411 65% 16% 14% 4%
2020s 320 64% 10% 24% 1%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
9…Be7 65% 64% ▼ -1.1%
9…Bc5 16% 10% ▼ -5.7%
9…Nc5 14% 24% ▲ +10.7%
9…Na5 4% 1% ▼ -2.7%
Joueurs célèbres
Champions du monde dans cette position
Tal, Mikhail — 8 parties
Carlsen, Magnus — 4 parties
Karpov, Anatoly — 2 parties
Kasparov, Garry — 1 partie
Kramnik, Vladimir — 1 partie
Anand, Viswanathan — 1 partie
Ding, Liren — 1 partie
Gukesh D — 1 partie
Parties historiques
9…Be7 — 68.5% (1789 parties)
1950 — Malmgren, Harald vs Cuadrado Orlando — 1-0 — cr.
1950 — Neatby, Leslie Hamilton vs Anderson, Frank Ross — 0-1 — Toronto CAN
1950 — Mross, Paul vs Eken, Max — 0-1 — ?
1950 — Franklin Kagoni vs Ragozin, Viacheslav — 0-1 — URS-ch sf Kiev UKR
1950 — Bosch van Rosenthal, Edzard vs Cuadrado Pastor, Antonio — 1/2-1/2 — ?
9…Bc5 — 14.6% (382 parties)
1950 — Skold, Kristian vs Poulsen, Christian — 1/2-1/2 — Dubrovnik olm
1950 — Konstantinov, Alexander vs Estrin, Yakov — 1/2-1/2 — Gorky
1950 — Konstantinov, Alexandr vs Estrin, Yakov — 1/2-1/2 — URS-ch sf Gorky
1950 — Mertins, Klaus vs Bachl, Anton — 0-1 — Northeim
1950 — Weiss, Adam vs Watzl — 0-1 — cr.
9…Nc5 — 12.7% (332 parties)
1950 — Siemms, Ross E vs Anderson, Frank Ross — 0-1 — Toronto CAN
1950 — Smyslov, Vasily vs Castillo Bermudez, Manuel — 1-0 — Venice ITA
1950 — Munch, Anders vs Hrudka, Oleksandr — 0-1 — DDR
1950 — Madsen, Sverre vs Malmgren, Harald — 1/2-1/2 — ICCF
1950 — Madsen, Alexander vs Malmgren, Adrian — 1/2-1/2 — cr.
9…Na5 — 3.4% (89 parties)
1950 — Kampman, Tijmen vs Illgen, Hans — 1/2-1/2 — Bielefeld
1950 — Fontana, Alessandro vs Gabiro Soul — 1-0 — cr.
1950 — Shaffer, Alexander vs Hadolt, Matthias — 1-0 — ?
1950 — Bohatyrchuk, Fedir Parfenovych vs Paterson, Smyth — 0-1 — Toronto CAN
1950 — Sigurdsson, Gudjon vs Vestol, Aage — 1-0 — Reykjavik ISL