B23n - 3…e5 - Chameleon (1928)

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B23n — Chameleon (1928)
1.e4 c5 2.Nc3 Nc6 3.Nge2 e5
Les coups candidats
4.Nd5 — 68.4% (609 parties)
Ambassadeurs : Tischbierek, Raj (7x), Perpinya Rofes, Lluis Maria (5x), Inkiov, Ventzislav (4x), Vogt, Lothar (4x), Ghinda, Mihail-Viorel (4x), Jansa, Vlastimil (4x), ? (4x), Zhelnin, Vladimir V (4x)
4.g3 — 15.0% (134 parties)
Ambassadeurs : Pizzato, Charles (2x), Shianovsky, Vladislav I (1x), Beliavsky, Alexander G (1x), Blackstone, John (1x), Shean, B. (1x), Kinzel, Anton (1x), Wolk, Sigmund (1x), Kozomara, Vlado (1x)
4.Ng3 — 10.9% (97 parties)
Ambassadeurs : Maisuradze, Nata (4x), Kontic, Djordjije (3x), Votava, Jan (2x), Manolov, Ivan (2x), Horvath, Peter (2x), Sydor, Andrzej (1x), Szukszta, Janus (1x), Yurkov, Aleksey (1x)
4.d3 — 4.7% (42 parties)
Ambassadeurs : Rosenhahn, Eberhard (2x), Bastrikov, Georgy (1x), Furman, Semyon (1x), Averbakh, Yuri L (1x), Taimanov, Mark (1x), Recalde, Eleuterio (1x), Wexler, Bernardo (1x), Piket, Joop (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 4.Nd5 4.g3 4.Ng3 4.d3
<1800 26 38% 23% 19% 19%
1800-2200 287 62% 20% 8% 8%
2200-2600 486 74% 12% 13% 1%
2600+ 12 58% 17% 25% —
Évolution par décennie (% des parties)
Décennie N parties 4.Nd5 4.g3 4.Ng3 4.d3
1950s 3 — — 33% 67%
1960s 16 56% 25% 6% 12%
1970s 13 54% 15% 31% —
1980s 47 79% 15% — 6%
1990s 229 79% 11% 5% 3%
2000s 235 73% 17% 3% 4%
2010s 228 69% 16% 9% 5%
2020s 120 38% 16% 42% 4%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
4.Nd5 69% 38% ▼ -31.0%
4.g3 16% 16% +0.0%
4.Ng3 9% 42% ▲ +32.5%
4.d3 5% 4% ▼ -1.1%
Joueurs célèbres
Champions du monde dans cette position
Anand, Viswanathan — 2 parties
Carlsen, Magnus — 1 partie
Hou, Yifan — 1 partie
Parties historiques
4.Nd5 — 68.4% (609 parties)
1962 — Hort, Vlastimil vs Vesely, Jiri — 1/2-1/2 — Jablonec
1962 — Hort, Vlastimil vs Spassky, Boris V. — 1/2-1/2 — Marianske Lazne
1962 — Gibbs, Peter Campbell vs Parr, Frank — 1-0 — Whitby ch-BCF
1965 — Jansa, Vlastimil vs Partos, Charles — 1-0 — Sinaia
1965 — Blatny, Frantisek vs Alster, Ladislav — 0-1 — Pardubice CZE
4.g3 — 15.0% (134 parties)
1962 — Kozomara, Vlado vs Bobotsov, Milko G — 1/2-1/2 — Sarajevo BIH
1963 — Kinzel, Anton vs Wolk, Sigmund — 1-0 — Bad Pyrmont GER
1968 — Blackstone, John vs Shean, B. — 1-0 — Sunnyvale, CA
1969 — Shianovsky, Vladislav I vs Beliavsky, Alexander G — 1/2-1/2 — ?
1974 — Garcia Palermo, Carlos Horacio vs Poch, Cesar G. — 1-0 — Caseros ch-ARG
4.Ng3 — 10.9% (97 parties)
1959 — Yurkov, Aleksey vs Salov, Aleksei — 1-0 — USSR
1969 — Sydor, Andrzej vs Szukszta, Janus — 1-0 — Lublin POL
1971 — Oetzel, Roland vs Marcinkowski, Kazimierz — 1/2-1/2 — Leipzig GER
1973 — Lehmann, Christina vs Burchardt, Brigitte — 0-1 — Erfurt GER
1975 — Barnes, Craig vs Rossetto, Hector — 1-0 — Lone Pine open
4.d3 — 4.7% (42 parties)
1958 — Bastrikov, Georgy vs Furman, Semyon — 0-1 — Sochi RUS
1958 — Averbakh, Yuri L vs Taimanov, Mark — 1-0 — Moscow RUS
1960 — Recalde, Eleuterio vs Wexler, Bernardo — 0-1 — Sao Paulo BRA
1969 — Piket, Joop vs De Ruiter, Tom — 1/2-1/2 — Leeuwarden ch-NED
1988 — Rosenhahn, Eberhard vs Riemer, Wolfgang — 1/2-1/2 — corr WT/M/GT