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A39c — Symmetrical, Main Line 7.d4 (1951)
1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.d4 cxd4 8.Nxd4
Les coups candidats
Ambassadeurs : Pribyl, Josef (13x), Arkell, Keith C (13x), Geller, Efim P. (11x), Bukic, Enver (11x), Senzacqua, Fabrizio (11x), Smejkal, Jan (9x), Zuckerman, Bernard (7x), Stein, Leonid (7x)
Ambassadeurs : Obregon Rivero, Juan Carlos (7x), Wang, Yiye (6x), Cerveny, Martin (5x), Lochte, Thomas (4x), Gutierrez Herrera, Jose Antonio (4x), Steindorsson, Sigurdur P. (3x), Petersen, Nils (3x), Kolanek, Roman (3x)
Ambassadeurs : Szalanczi, Emil (43x), Hegeler, Frank (13x), Madl, Ildiko (11x), Holzke, Frank (11x), Tolnai, Tibor (10x), Leko, Peter (9x), Horvath, Jozsef (9x), Stocek, Jiri (7x)
Ambassadeurs : Adamski, Jan (8x), Japiassu, Ricardo De Villa Nova (4x), Balcerowski, Witold (3x), Golombek, Harry (3x), Khadempour, Farhad (3x), Loginov, Valery A (3x), Frois, Antonio (3x), Al-Awadhi, Khalid (2x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 8…Nxd4 8…Qb6 8…Ng4 8…a6
<1800 782 42% 17% 6% 18%
1800-2200 7409 45% 17% 8% 15%
2200-2600 6184 46% 8% 18% 6%
2600+ 203 30% 0% 12% 0%
Évolution par décennie (% des parties)
Décennie N parties 8…Nxd4 8…Qb6 8…Ng4 8…a6
1950s 78 31% 17% 17% 18%
1960s 284 57% 10% 8% 7%
1970s 426 61% 6% 3% 10%
1980s 815 54% 9% 15% 9%
1990s 3100 44% 13% 18% 10%
2000s 4004 47% 15% 13% 13%
2010s 6370 43% 14% 9% 12%
2020s 1414 39% 10% 7% 13%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
8…Nxd4 43% 39% ▼ -4.3%
8…Qb6 14% 10% ▼ -4.6%
8…Ng4 9% 7% ▼ -2.8%
8…a6 12% 13% ▲ +1.0%
Joueurs célèbres
Champions du monde dans cette position
Tal, Mikhail — 9 parties
Anand, Viswanathan — 7 parties
Kasparov, Garry — 7 parties
Kramnik, Vladimir — 6 parties
Karpov, Anatoly — 5 parties
Carlsen, Magnus — 5 parties
Ju, Wenjun — 4 parties
Botvinnik, Mikhail — 2 parties
Ding, Liren — 2 parties
Gukesh D — 1 partie
Parties historiques
8…Nxd4 — 45.1% (7440 parties)
1950 — Decker, Arnold Sheldon vs Rabar, Braslav — 1-0 — telex
1952 — Parak, Frantisek vs Jost, Felix — 1-0 — Helsinki olm
1952 — Heinicke, Herbert vs Levy, Pascal — 1-0 — Helsinki olm
1953 — Fuchs, Reinhart vs Knothe, Karl — 1/2-1/2 — GDR-ch Jena GER
1953 — Udovcic, Mijo vs Eugenio, Sarah De Oliveira — 1-0 — Venice ITA
8…Qb6 — 13.2% (2175 parties)
1952 — Morcken, Otto B vs Morel, Fernand — 0-1 — Helsinki olm
1952 — Canton, B. vs O'sullivan, Clara — 1-0 — Dublin IRL
1953 — Anay Barche vs Dely, Peter — 1/2-1/2 — HUN-ch Budapest HUN
1954 — Larsen, Bent vs Andersen, Henry — 0-1 — Copenhagen DEN
1955 — Kreppenhofer vs Muller, Wilhelm — 1/2-1/2 — Antwerp BEL
8…Ng4 — 11.7% (1935 parties)
1953 — Larsen, Bent vs Jacobsen, Arenth — 1-0 — Copenhagen DEN
1954 — Polugaevsky, Lev vs Lipnitsky, Isaac — 1-0 — Riga LAT
1954 — Arnold, Dietmar vs Malich, Burkhard, Dr. — 0-1 — Schkopau
1955 — Lombardy, William J vs Pinkus, Albert — 0-1 — New York, NY USA
1955 — Smyslov, Vasily vs Milic, Borislav — 1-0 — Zagreb CRO
8…a6 — 11.4% (1888 parties)
1955 — Aditya Balu Jadhav vs Golombek, Harry — 1-0 — Mont Pelerin sur Vevey
1955 — Feuerstein, Arthur vs Rodriguez Garcia, Benedicto — 1-0 — New York, NY USA
1956 — Rodriguez Rodriguez, Rodrigo vs Franco Raymundo, Eduardo — 1-0 — Barcelona ESP
1956 — Kolvig, Bent vs Nilsson, Mogens — 1-0 — Copenhagen DEN
1957 — Boey, Josef vs Decleir, Walter — 1-0 — Antwerp BEL