D15l - 5.a4 - Chameleon (2001)

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D15l — Chameleon (2001)
1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 a6 5.a4
Les coups candidats
Ambassadeurs : Velicka, Petr (23x), Burmakin, Vladimir (20x), Bacrot, Etienne (19x), Shulman, Yury (19x), Van Wely, Loek (17x), Volkov, Sergey (17x), Beliavsky, Alexander G (15x), Ikonnikov, Vyacheslav (15x)
5…g6 — 8.8% (309 parties)
Ambassadeurs : Fang, Yuxiang (5x), Dovzik, Juri (3x), Hellsten, Johan (3x), Zichichi, Alvise (3x), Seres, Lajos (2x), Shulman, Yury (2x), Schneider, Stefan (2x), Klichev, Mikhail (2x)
5…Bf5 — 8.1% (284 parties)
Ambassadeurs : Volkov, Sergey (7x), Smirnov, Valerij (2x), Liutsko, Igor (2x), Labib, Ibrahim Hasan (2x), Saric, Kristina (2x), Yevseev, Denis (1x), Karger, Frank (1x), Fischdick, Gisela (1x)
5…a5 — 2.6% (92 parties)
Ambassadeurs : Dableo, Ronald II (6x), Liutsko, Igor (3x), Bobinski, Lukasz (2x), Sokolovs, Andrei (1x), Czanderle, Guenther (1x), Tummes, Boris (1x), Seepe, Udo (1x), Gregor, Michal (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 5…e6 5…g6 5…Bf5 5…a5
<1800 120 65% 4% 15% 2%
1800-2200 1093 66% 10% 12% 4%
2200-2600 1945 80% 9% 6% 2%
2600+ 227 93% 4% 1% —
Évolution par décennie (% des parties)
Décennie N parties 5…e6 5…g6 5…Bf5 5…a5
1980s 6 50% 17% — —
1990s 357 65% 20% 10% 1%
2000s 1413 79% 6% 7% 2%
2010s 1541 76% 9% 7% 3%
2020s 181 70% 5% 16% 5%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
5…e6 76% 70% ▼ -6.2%
5…g6 9% 5% ▼ -4.2%
5…Bf5 7% 16% ▲ +8.6%
5…a5 3% 5% ▲ +2.1%
Joueurs célèbres
Champions du monde dans cette position
Kramnik, Vladimir — 10 parties
Carlsen, Magnus — 10 parties
Kasparov, Garry — 3 parties
Ding, Liren — 3 parties
Botvinnik, Mikhail — 1 partie
Anand, Viswanathan — 1 partie
Ju, Wenjun — 1 partie
Parties historiques
5…e6 — 75.8% (2650 parties)
1985 — Belov, Igor vs Dreev, Aleksey — 1/2-1/2 — Moscow RUS
1987 — Sarwinski, Miroslaw vs Seifert, Henryk — 1-0 — Jachranka
1989 — Bajovic, Milan vs Lissowska, Anna — 1/2-1/2 — Naleczow
1990 — Peric, Slavisa vs Nemeth, Maria — 1-0 — Kecskemet HUN
1991 — Kluss, Kai vs Dobosz, Henryk — 1/2-1/2 — Goch op
5…g6 — 8.8% (309 parties)
1989 — Monnard, Laurent vs Ohl, Christophe — 1/2-1/2 — Lyon FRA
1991 — Bator, Robert vs Engqvist, Thomas — 0-1 — Taby
1992 — Khalifman, Alexander vs Sokolov, Ivan — 0-1 — Groningen NED
1994 — Zueger, Beat vs Preissmann, Emmanuel — 0-1 — Neuchatel
1994 — Steger, Markus vs Holzweber, Martin — 0-1 — Schladming
5…Bf5 — 8.1% (284 parties)
1993 — Kaidanov Shabalov vs Sterud — 1-0 — USA Championship Rd.
1993 — Kaidanov, Gregory vs Shabalov, Alexander — 1-0 — Long Beach ch-USA
1994 — Smirnov, Valerij vs Liutsko, Igor — 1-0 — ?
1994 — Smirnov, Valerij vs Liutsko, Igor — 1-0 — Minsk BLR
1994 — Dydyshko, Viacheslav vs Koutsin, Sergey — 1-0 — Czechoslovakia
5…a5 — 2.6% (92 parties)
1993 — Tummes, Boris vs Seepe, Udo — 1/2-1/2 — Muenster GER
1996 — Sokolovs, Andrei vs Czanderle, Guenther — 1-0 — Berlin GER
1999 — Liutsko, Igor vs Gregor, Michal — 1-0 — Presov op Presov SVK
2000 — Turna, Stefan vs Betko, Lubomir — 1/2-1/2 — Slovakia
2002 — Cativelli, Gerardo vs Wisniacki, Flavio — 1-0 — Buenos Aires ARG