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A28i — Four Knights
1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e3 Bb4 5.Qc2
Eval: [-0.04]
Les coups candidats
Ambassadeurs : Hassim, Unes (21x), Tsenkov, Ljubomir (20x), Ellis, James R (20x), Jørgensen, Brian Jørgen (19x), Bishop, William (18x), Suba, Mihai (17x), Lanzani, Paolo (17x), Esin, Maxim (16x)
5…O-O — 40.9% (2249 parties)
Ambassadeurs : Van Deursen, Peter (10x), Linqvist, Grels (10x), Vötter, Hans-Dieter (10x), Miles, Anthony J (9x), Portisch, Lajos (8x), Jeske, Eckhard (8x), Bishop, Nicholas (8x), Timman, Jan H (8x)
5…d6 — 7.9% (437 parties)
Ambassadeurs : von Buttlar, Paul (4x), Lanzani, Paolo (4x), Sodomski, Andrzej (4x), Mareco, Sandro (4x), Harsha Bharathakoti (4x), Almeraya, Eduardo (4x), Timman, Jan H (4x), Stohl, Igor (3x)
5…a5 — 1.1% (60 parties)
Ambassadeurs : Fyllingen, Roy Harald (2x), Jovic, Stanoje (2x), Grunberg, Mihai-Lucian (2x), Petersons, Indulis (2x), Homa, Seth (2x), Stremavicius, Titas (2x), Savon, Vladimir A (1x), Anikaev, Yuri N (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 5…Bxc3 5…O-O 5…d6 5…a5
<1800 94 34% 50% 14% 1%
1800-2200 1353 45% 44% 8% 1%
2200-2600 3072 54% 37% 7% 1%
2600+ 245 70% 20% 8% 1%
Évolution par décennie (% des parties)
Décennie N parties 5…Bxc3 5…O-O 5…d6 5…a5
1880s 1 100%
1930s 2 100%
1950s 6 100%
1960s 17 18% 82%
1970s 240 20% 71% 8% 1%
1980s 361 43% 52% 4% 1%
1990s 525 36% 57% 6% 1%
2000s 876 40% 49% 9% 1%
2010s 2355 54% 35% 10% 1%
2020s 1121 64% 29% 5% 2%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
5…Bxc3 54% 64% ▲ +10.6%
5…O-O 35% 29% ▼ -6.4%
5…d6 10% 5% ▼ -4.9%
5…a5 1% 2% +0.4%
Joueurs célèbres
Champions du monde dans cette position
Smyslov, Vladimir — 10 parties
Ding, Liren — 7 parties
Kasparov, Garry — 4 parties
Karpov, Anatoly — 4 parties
Karpov, Aleksandr — 3 parties
Anand, Viswanathan — 2 parties
Carlsen, Magnus — 2 parties
Tal, Mikhail — 1 partie
Hou, Yifan — 1 partie
Ju, Wenjun — 1 partie
Parties historiques
5…Bxc3 — 49.6% (2729 parties)
1883 — McKenzie, George vs Rosenthal, Samuel — 1/2-1/2 — London ENG
1965 — Antoshin, Vladimir S vs Flohr, Salo — 1/2-1/2 — Sochi RUS
1965 — Poder, Walter vs Preo, Nicolas A — 0-1 — ?
1968 — Poder, William vs Preo, Nicolas A — 0-1 — CCOL5 fin 6568
1974 — Polugaevsky, Lev vs Matanovic, Aleksandar — 1/2-1/2 — Belgrade-Moscow
5…O-O — 40.9% (2249 parties)
1935 — Pirc, Vasja vs Lilienthal, Andor — 0-1 — Warsaw POL
1936 — Flohr, Salo vs Fine, Reuben — 1/2-1/2 — Nottingham ENG
1951 — Heinicke, Herbert vs Bogoljubow, Efim — 0-1 — Augsburg GER
1952 — Filip, Miroslav vs Potucek, Ludovit — 1-0 — Tatranska Lomnica
1954 — Zaruba, Antonin vs Tikovsky, Augustin — 0-1 — Jablonec nad Nisou
5…d6 — 7.9% (437 parties)
1973 — Deleyn, Gunter vs Diesen, Mark C — 1/2-1/2 — Schilde
1974 — Langeweg, Kick vs Timman, Jan H — 1/2-1/2 — Wijk aan Zee NED
1975 — Eising, Johannes vs Enklaar, Bert — 1-0 — Amsterdam NED
1977 — Adamski, Jan vs Kholmov, Ratmir D — 1/2-1/2 — Zala Cup Zalaegerszeg
1977 — Korchnoi, Viktor vs Timman, Jan H — 1-0 — Leeuwarden ch-NED
5…a5 — 1.1% (60 parties)
1976 — Tangborn, Eric vs Brown, Paul — 1-0 — Gresham
1979 — Savon, Vladimir A vs Anikaev, Yuri N — 1-0 — Suomi
1980 — Landsman, Klaas vs Ramaekers, Philippe — 1-0 — Dieren NED
1982 — Santa Torres, Juan M. vs Juarez Flores, Carlos A. — 0-1 — Lucerne SUI
1990 — Derikum, Axel vs Messmer, Martin — 1/2-1/2 — GER