A90c - 4.Nf3 [+0.47]

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A90c —
1.d4 f5 2.c4 Nf6 3.g3 e6 4.Nf3
Eval: [+0.47]
Les coups candidats
Ambassadeurs : Gleizerov, Evgeny (36x), Ulybin, Mikhail (19x), Karlsson, Lars 1937 (8x), Voyska, Margarita (8x), Vaisser, Anatoly (8x), Lyell, Mark (8x), Glek, Igor (7x), Vihinen, Teemu (7x)
4…Be7 — 31.5% (1676 parties)
Ambassadeurs : Naumkin, Igor (13x), Roos, Jean-Luc (8x), Bischoff, Klaus (7x), Zalys, Ignas (6x), Burmeister, Rick (6x), Pres, Grigorij (5x), Meessen, Rudolf (5x), Fleischer, Frank (5x)
4…c6 — 10.5% (559 parties)
Ambassadeurs : Iljushin, Alexei (9x), Moskalenko, Viktor (6x), Zatonskih, Anna (4x), Kovacevic, Blazimir (4x), Akobian, Varuzhan (4x), Lehmann, Zoltan (4x), Risting, Eivind Olav (4x), Escofet, Jaime (4x)
4…Bb4+ — 9.7% (517 parties)
Ambassadeurs : Karlsson, Lars 1937 (9x), Naumkin, Igor (9x), Opocensky, Karel (4x), Groenegress, Wilfried (4x), Spielmann, Rudolf (3x), Stahlberg, Gideon (3x), Makarichev, Sergey (3x), Lerch, Martin (3x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 4…d5 4…Be7 4…c6 4…Bb4+
<1800 168 37% 32% 13% 5%
1800-2200 2136 35% 32% 10% 9%
2200-2600 2036 44% 27% 12% 9%
2600+ 27 59% 19% 4% 4%
Évolution par décennie (% des parties)
Décennie N parties 4…d5 4…Be7 4…c6 4…Bb4+
1890s 1 100% — — —
1910s 1 100% — — —
1920s 2 — 50% — —
1930s 21 — 24% — 67%
1940s 24 4% 62% — 21%
1950s 57 11% 61% 5% 19%
1960s 73 5% 67% 1% 15%
1970s 100 16% 53% 2% 21%
1980s 322 41% 31% 6% 14%
1990s 1014 40% 32% 12% 8%
2000s 1346 36% 31% 12% 9%
2010s 1887 40% 28% 12% 8%
2020s 468 38% 34% 6% 12%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
4…d5 40% 38% ▼ -2.5%
4…Be7 28% 34% ▲ +6.3%
4…c6 12% 6% ▼ -5.5%
4…Bb4+ 8% 12% ▲ +3.8%
Joueurs célèbres
Champions du monde dans cette position
Alekhine, Alexander — 3 parties
Botvinnik, Mikhail — 3 parties
Tal, Mikhail — 2 parties
Gukesh D — 2 parties
Karpov, Anatoly — 1 partie
Ju, Wenjun — 1 partie
Hou, Yifan — 1 partie
Parties historiques
4…d5 — 37.4% (1990 parties)
1898 — Lipke, Paul vs Walbrodt, Carl — 1/2-1/2 — Vienna AUT
1919 — Rubinstein, Akiba vs Flamberg, Alexander — 0-1 — Warszawa ch-city
1948 — Bruckner, Gerhard vs Watzl, Leopold — 0-1 — Bad Gastein
1951 — Andrich, Alexander vs Ivkov, Bojidar — 0-1 — Sarajevo BIH
1954 — Weigelt Horst vs Besser, Hans — 1/2-1/2 — Schkopau
4…Be7 — 31.5% (1676 parties)
1920 — Gruenfeld, Ernst vs Horowitz, Binyamin — 1-0 — Vienna AUT
1933 — Goglidze, Viktor vs Zubarev, Nikolay — 1/2-1/2 — Leningrad RUS
1934 — Herzog, Franz vs Flohr, Salo — 0-1 — Bad Liebenwerda
1936 — Fine, Richard Alvaro Adrien vs Alekhine, Alexander — 1/2-1/2 — Amsterdam NED
1938 — Bergqvist, Allan vs Johansson, Martin 1979 — 1-0 — Stockholm SWE
4…c6 — 10.5% (559 parties)
1951 — Giustolisi, Alberto vs Adserias Sanz, Juan — 1-0 — Madrid ESP
1954 — Borisenko, Georgy K vs Shamaev, Leonid — 1/2-1/2 — Leningrad RUS
1957 — Koska, Josef vs Novotny, Oldrich — 1-0 — Brno CZE
1967 — Popov, Luben vs Marić, Rudolf — 1/2-1/2 — Skopje MKD
1970 — Sahovic, Dragutin vs Marić, Rudolf — 1/2-1/2 — Yugoslavia
4…Bb4+ — 9.7% (517 parties)
1931 — Pirc, Vasja vs Spielmann, Rudolf — 0-1 — Rogatska Slatina
1931 — Stoltz, Gösta vs Spielmann, Rudolf — 1/2-1/2 — Bled SLO
1931 — Botvinnik, Mikhail vs Konstantinopolsky, Alexander — 0-1 — ?
1931 — Botvinnik, Mikhail vs Konstantinopolsky, Alexander — 0-1 — Moscow ch-SU sf
1933 — Stahlberg, Gideon vs Spielmann, Rudolf — 1-0 — Stockholm SWE