D24i - 4…a6 5.a4 - QGA (1905)

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D24i —
1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Nc3 a6 5.a4
Les coups candidats
Ambassadeurs : Schmitz, Manuela (6x), Bernard, Ryszard (4x), Grottke, Hans-Joachim, Dr. (4x), Fominyh, Alexander (4x), Schmitz, Andreas Arnold (4x), Reis, Alan De Albuquerque Maran (4x), Foguelman, Alberto (3x), Danielian, Elina (3x)
5…e6 — 20.6% (341 parties)
Ambassadeurs : Kazmierczak, Ewa (3x), Flohr, Salo (2x), Olivier, Jean-Christophe (2x), Jackova, Jana (2x), Krivec, Jana (2x), Lorenz, Oda (2x), Mosler Christa (2x), Ulms, Sandra (2x)
5…c5 — 7.3% (120 parties)
Ambassadeurs : Janowski, Dawid (6x), Rubinstein, Akiba (5x), Saemisch, Friedrich (3x), Sazhinov, Alexander (3x), ? (2x), Rothman, Isidore (2x), Spesny, Jan (2x), Steiner, Herman (1x)
5…Bf5 — 5.1% (85 parties)
Ambassadeurs : Moguilevsky M (2x), Grachev, Jury (2x), Gazvoda, Franc (2x), Nilsson, Zandor (1x), Stoltz, Gosta (1x), Rossetto, Hector (1x), Marini, Luis (1x), Steger, Josef (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 5…Nc6 5…e6 5…c5 5…Bf5
<1800 41 34% 39% 2% 12%
1800-2200 645 62% 22% 6% 5%
2200-2600 554 73% 17% 6% 3%
2600+ 5 80% 20% — —
Évolution par décennie (% des parties)
Décennie N parties 5…Nc6 5…e6 5…c5 5…Bf5
1900s 5 20% 40% 40% —
1910s 1 — — 100% —
1920s 3 — — 100% —
1930s 24 12% 33% 46% —
1940s 14 29% 36% 7% 29%
1950s 23 35% 30% — 22%
1960s 52 60% 15% 12% 6%
1970s 42 62% 24% — 5%
1980s 85 61% 8% 14% 12%
1990s 345 61% 21% 10% 5%
2000s 476 63% 24% 5% 5%
2010s 469 65% 20% 4% 4%
2020s 114 77% 15% 4% 1%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
5…Nc6 65% 77% ▲ +12.4%
5…e6 20% 15% ▼ -4.9%
5…c5 4% 4% -0.1%
5…Bf5 4% 1% ▼ -3.6%
Joueurs célèbres
Champions du monde dans cette position
Euwe, Max — 1 partie
Smyslov, Vladimir — 1 partie
Kramnik, Vladimir — 1 partie
Parties historiques
5…Nc6 — 62.1% (1026 parties)
1900 — Carrera Sterling, Jesus David vs Rosen Vivek Murugesan — 1/2-1/2 — Paris FRA
1935 — Sacconi, Antonio vs Book, Eero — 0-1 — Warsaw ol Warsaw POL
1936 — Saemisch, Friedrich vs Barcza, Gedeon — 1/2-1/2 — Liberec
1936 — Lindner Lages, Jorge vs Fuster, Geza — 1-0 — Budapest HUN
1940 — Wijnans, Arthur vs Euwe, Max — 0-1 — Beverwijk NED
5…e6 — 20.6% (341 parties)
1905 — Morrison, John vs Forgacs, Leo — 0-1 — Barmen GER
1907 — Nimzowitsch, Aron vs Neumann, Augustin — 1/2-1/2 — Vienna AUT
1931 — Berger Chepurniak, Violetta vs Flohr, Salo — 0-1 — Brno CZE
1932 — De Winter Gallegos, Willy vs Flohr, Salo — 0-1 — London ENG
1934 — Sacconi, Antonio vs Spielmann, Rudolf — 1-0 — Sopron
5…c5 — 7.3% (120 parties)
1906 — Teichmann, Richard vs Janowski, Dawid — 1-0 — Ostende
1906 — Fahrni, Hans vs Janowski, Dawid — 1/2-1/2 — Ostend
1916 — Showalter, Jackson vs Janowski, Dawid — 0-1 — Lexington, KY USA
1925 — Haida, August Konrad vs Janowski, Dawid — 0-1 — Marienbad CZE
1925 — Opocensky, Karel vs Janowski, Dawid — 1/2-1/2 — it Marienbad Czech Republic
5…Bf5 — 5.1% (85 parties)
1946 — Nilsson, Zandor vs Stoltz, Gosta — 0-1 — Stockholm SWE
1946 — Steger, Josef vs Zemgalis, Elmars — 0-1 — Nt Regensburg GER
1947 — Rossetto, Hector vs Marini, Luis — 1/2-1/2 — Mar del Plata ARG
1948 — Platt, Josef vs Lokvenc, Josef — 1/2-1/2 — Bad Gastein
1950 — Rudenko, Ludmila vs Benini, Clarice — 1-0 — Moscow RUS