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A39d — Symmetrical, Main Line 7.d4 (1939)
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 Qa5
Les coups candidats
9.Nb3 — 45.8% (571 parties)
Ambassadeurs : Goganov, Aleksey (4x), Banusz, Tamas (4x), Xu, Minghui (4x), Fedder, Steen (3x), Tukmakov, Vladimir B (3x), Matlakov, Maxim (3x), Swayams, Mishra (3x), Pantsulaia, Levan (3x)
9.e3 — 23.8% (296 parties)
Ambassadeurs : Gurgenidze, Bukhuti (2x), Annageldyev, Orazly (2x), Kunte, Abhijit (2x), Romanishin, Oleg M (2x), Meier, Georg (2x), Sadhwani, Raunak (2x), Gabuzyan, Hovhannes (2x), Drygalov, Sergey (2x)
9.Nc2 — 22.6% (282 parties)
Ambassadeurs : Cebalo, Miso (4x), Jansa, Vlastimil (3x), Gipslis, Aivars (2x), Kulaots, Kaido (2x), Kholmov, Ratmir D (1x), Avner, Uri (1x), Bobekov, Radko (1x), Piskov, Kamen Penev (1x)
9.Nxc6 — 2.1% (26 parties)
Ambassadeurs : Kieser, Ernst (1x), Liang, Jinrong (1x), Nazarenus, Olaf (1x), Schluchter, Steffen (1x), Belousek, Michael (1x), Cernousek, Lukas (1x), Mas, Ioana (1x), Paasikangas, Johanna (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 9.Nb3 9.e3 9.Nc2 9.Nxc6
<1800 31 48% 16% 19% 6%
1800-2200 367 40% 23% 22% 5%
2200-2600 669 50% 23% 24% 0%
2600+ 86 47% 42% 9% —
Évolution par décennie (% des parties)
Décennie N parties 9.Nb3 9.e3 9.Nc2 9.Nxc6
1950s 10 30% 20% 30% —
1960s 24 25% 8% 54% —
1970s 30 60% 3% 30% —
1980s 39 56% 13% 21% 3%
1990s 108 42% 23% 22% 6%
2000s 112 39% 17% 29% 4%
2010s 686 51% 25% 19% 1%
2020s 237 36% 30% 25% 2%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
9.Nb3 51% 36% ▼ -14.3%
9.e3 25% 30% ▲ +5.6%
9.Nc2 19% 25% ▲ +5.5%
9.Nxc6 1% 2% ▲ +0.7%
Joueurs célèbres
Champions du monde dans cette position
Anand, Viswanathan — 2 parties
Ding, Liren — 2 parties
Tal, Mikhail — 1 partie
Ju, Wenjun — 1 partie
Parties historiques
9.Nb3 — 45.8% (571 parties)
1956 — Buslaev, Aleksander vs Gurgenidze, Bukhuti — 1/2-1/2 — Georgia
1958 — Varnusz, Egon vs Bak, Istvan — 1/2-1/2 — HUN-ch Budapest HUN
1959 — Forintos, Gyozo V vs Gipslis, Aivars — 1/2-1/2 — Budapest HUN
1960 — Lloyd, Kenneth vs Malich, Burkhard, Dr. — 0-1 — Leningrad RUS
1963 — Spassky, Boris Vasily vs Suetin, Alexey S — 1/2-1/2 — Leningrad ch-URS
9.e3 — 23.8% (296 parties)
1957 — Aaltio, Erkki vs Gurgenidze, Bukhuti — 0-1 — Reykjavik ISL
1958 — Zilber, Israel vs Gurgenidze, Bukhuti — 1-0 — Rostov on Don
1960 — Uusi, Gunnar vs Gipslis, Aivars — 1/2-1/2 — Vilnius LTU
1965 — Kolbak, Jens vs Jansa, Vlastimil — 1/2-1/2 — Sinaia
1977 — Kaspret, Guido vs Rivas Pastor, Manuel — 1/2-1/2 — Innsbruck AUT
9.Nc2 — 22.6% (282 parties)
1950 — Bobekov, Radko vs Piskov, Kamen Penev — 1/2-1/2 — Sofia BUL
1954 — Tarasov, Vadim vs Gurgenidze, Bukhuti — 0-1 — Erevan ARM
1954 — Fridstein, German vs Byvshev, Vasily — 1/2-1/2 — Riga LAT
1961 — Filip, Miroslav vs Afizov, Marsel — 1-0 — Kosice
1961 — Bagirov, Vladimir vs Gipslis, Aivars — 1/2-1/2 — Baku ch-URS
9.Nxc6 — 2.1% (26 parties)
1982 — Kieser, Ernst vs Liang, Jinrong — 0-1 — Lugano op
1990 — Sievilainen, Tuomo vs Lahti, Jouko — 1/2-1/2 — Kuopio Kalakukko
1992 — Mas, Ioana vs Paasikangas, Johanna — 0-1 — Wch U18 Girls
1995 — Aarush More vs Martinez Alcazar, Jesus — 0-1 — Burjasot
1996 — Nazarenus, Olaf vs Schluchter, Steffen — 1-0 — Pfalz-chB Landau