E21a - 4…* - Three Knights Variation (1920)

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E21a — Three Knights Variation (1920)
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3
Les coups candidats
Ambassadeurs : Barsov, Alexei (38x), Kolanek, Roman (28x), Bacrot, Etienne (25x), Campos Moreno, Javier B. (22x), Stocek, Jiri (22x), Borisenko, Georgy K (21x), Ubilava, Elizbar (19x), Babujian, Levon (19x)
Ambassadeurs : Borisenko, Georgy K (39x), Bakheet Farag (34x), Pinter, Jozsef (32x), Barsov, Alexei (32x), Bacrot, Etienne (30x), Ubilava, Elizbar (28x), Korchnoi, Viktor (26x), Karpov, Anatoly (25x)
Ambassadeurs : Habes, Jiri (15x), Mamedyarov, Shakhriyar (14x), Chatalbashev, Boris (13x), Ding, Liren (11x), Vetter, Udo (8x), Nakamura, Hikaru (8x), Borisenko, Georgy K (7x), Carlsen, Magnus (7x)
Ambassadeurs : Aleksandrov, Viktor A. (11x), Kolanek, Roman (10x), Dizdar, Goran (9x), Chatalbashev, Boris (9x), Xu, Yi (8x), Stocek, Jiri (7x), Batsiashvili, Nino (7x), Bakheet Farag (6x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 4…b6 4…c5 4…O-O 4…d5
<1800 1209 29% 22% 29% 10%
1800-2200 6135 35% 25% 22% 9%
2200-2600 8718 36% 33% 16% 10%
2600+ 1041 37% 31% 13% 14%
Évolution par décennie (% des parties)
Décennie N parties 4…b6 4…c5 4…O-O 4…d5
1950s 234 29% 38% 18% 7%
1960s 392 28% 41% 20% 7%
1970s 273 27% 49% 13% 4%
1980s 1296 32% 45% 11% 6%
1990s 2467 29% 41% 16% 6%
2000s 5191 34% 35% 16% 8%
2010s 7466 39% 23% 20% 12%
2020s 2378 32% 11% 31% 17%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
4…b6 39% 32% ▼ -7.0%
4…c5 23% 11% ▼ -11.6%
4…O-O 20% 31% ▲ +11.1%
4…d5 12% 17% ▲ +5.0%
Joueurs célèbres
Champions du monde dans cette position
Tal, Mikhail — 10 parties
Karpov, Anatoly — 10 parties
Kasparov, Garry — 10 parties
Anand, Viswanathan — 10 parties
Kramnik, Vladimir — 10 parties
Carlsen, Magnus — 10 parties
Hou, Yifan — 10 parties
Ju, Wenjun — 10 parties
Ding, Liren — 10 parties
Gukesh D — 6 parties
Botvinnik, Mikhail — 4 parties
Smyslov, Vladimir — 1 partie
Parties historiques
4…b6 — 34.6% (6817 parties)
1950 — Barendregt, Johan vs Spanjaard, Eduard — 1/2-1/2 — Amsterdam ch-NED
1950 — Alexander, FFL. vs Golombek, Harry — 1-0 — Southsea
1950 — Hartleb, Glenn E vs Anderson, Frank Ross — 0-1 — USA vs Canada
1950 — Borisenko, Georgy K vs Smyslov, Vasily — 1-0 — Moskou ch-URS
1950 — Donner, Jan-Hein vs Golombek, Harry — 1-0 — Venice ITA
4…c5 — 29.3% (5764 parties)
1950 — Lastovicka, Jiri vs Pechan, Z. — 1/2-1/2 — Chocen
1950 — Winterton, Ken vs Bogoljubow, Efim — 0-1 — Southsea
1950 — Stahlberg, Gideon vs Donner, Jan-Hein — 1/2-1/2 — Amsterdam NED
1950 — Heemskerk, Fenny vs Chaude de Silans, Chantal — 0-1 — Moscow RUS
1951 — Pachman, Ludek vs Balanel, Ion — 1-0 — Marianske Lazne zt
4…O-O — 19.1% (3766 parties)
1950 — Kauder, Hartmut vs Pietzsch, Wolfgang — 1/2-1/2 — Soemmerda GER
1950 — Miguel, Nahuel vs Pirc, Vasja — 1-0 — Bled SLO
1950 — Bosch van Rosenthal, Edzard vs Pirc, Vasja — 0-1 — Dubrovnik CRO
1950 — Enevoldsen, Harald vs Mueller, Hans — 1-0 — Dubrovnik CRO
1950 — Gusev, Aleksandr vs Blagidze — 1-0 — Moscow RUS
4…d5 — 10.0% (1978 parties)
1950 — Bosch van Rosenthal, Edzard vs Rabar, Braslav — 0-1 — ?
1950 — Collet, Hugo vs Eken, Max — 1/2-1/2 — It Beverwijk NED
1951 — Niephaus, Walter vs Bogoljubow, Efim — 1-0 — Baden-Baden GER
1954 — Botvinnik, Mikhail vs Kan, Ilya A — 1-0 — Training
1955 — Kwilecki, Andrzej vs Szymanski, Andrzej — 1/2-1/2 — Wroclaw POL