A39g - 8…d6 - Symmetrical, Main Line 7.d4 (1942)

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A39g — Symmetrical, Main Line 7.d4 (1942)
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 d6
Les coups candidats
9.Nxc6 — 60.1% (863 parties)
Ambassadeurs : Vaulin, Alexander P. (7x), Szieberth, Adam (7x), Sermek, Drazen (5x), Trauth, Michael, Dr. (5x), Loeffler, Stefan (4x), Klipper, Rebecca (4x), Ghitescu, Theodor (3x), Reeh, Oliver (3x)
9.Nc2 — 22.3% (320 parties)
Ambassadeurs : Luther, Thomas (5x), Krogius, Nikolai V (4x), Loginov, Valery A (4x), Liebert, Heinz (3x), Danailov, Silvio (2x), Osnos, Viatcheslav (2x), Pribyl, Josef (2x), Portisch, Lajos (2x)
9.e3 — 6.8% (97 parties)
Ambassadeurs : Melkumyan, Hrant (3x), Szekely, Peter (2x), Fridman, Daniel (2x), Huzman, Alexander (2x), Forintos, Gyozo V (1x), Gheorghiu, Florin (1x), Peterson, Andrejs (1x), Kholmov, Ratmir D (1x)
9.b3 — 4.3% (62 parties)
Ambassadeurs : Vadasz, Laszlo (2x), Vokroj, Rene (2x), Szieberth, Adam (2x), Balogh, Tomas (2x), Schatz, Christian (2x), Darga, Klaus (1x), Larsen, Bent Ravn (1x), Keitlinghaus, Ludger (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 9.Nxc6 9.Nc2 9.e3 9.b3
<1800 40 82% 18% — —
1800-2200 520 65% 15% 7% 4%
2200-2600 753 55% 28% 7% 5%
2600+ 29 59% 17% 21% —
Évolution par décennie (% des parties)
Décennie N parties 9.Nxc6 9.Nc2 9.e3 9.b3
1960s 25 52% 32% 8% 4%
1970s 45 53% 36% 7% —
1980s 62 66% 21% 3% 5%
1990s 272 60% 21% 6% 6%
2000s 317 59% 23% 9% 3%
2010s 518 61% 22% 6% 4%
2020s 196 61% 19% 8% 7%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
9.Nxc6 61% 61% -0.5%
9.Nc2 22% 19% ▼ -3.3%
9.e3 6% 8% ▲ +1.7%
9.b3 4% 7% ▲ +3.5%
Joueurs célèbres
Champions du monde dans cette position
Karpov, Anatoly — 2 parties
Tal, Mikhail — 1 partie
Kramnik, Vladimir — 1 partie
Botvinnik, Mikhail — 1 partie
Hou, Yifan — 1 partie
Parties historiques
9.Nxc6 — 60.1% (863 parties)
1963 — Brinck-Claussen, Bjorn vs Lengyel, Laszlo — 1-0 — Hastings ENG
1964 — Kholmov, Ratmir D vs Haag, Ervin — 1/2-1/2 — Pecs
1964 — Mardle, Denis vs Gheorghiu, Florin — 0-1 — Hastings ENG
1964 — Atamanov, Andrey vs ? — 1/2-1/2 — ?
1964 — Krogius, Nikolai V vs Kholmov, Ratmir D — 1/2-1/2 — Sochi RUS
9.Nc2 — 22.3% (320 parties)
1964 — Pachman, Ludek vs Szabo, Laszlo — 1/2-1/2 — Kecskemet HUN
1966 — Averbakh, Yuri L vs Shamkovich, Leonid — 1-0 — Moscow Training
1967 — Langeweg, Kick vs Krogius, Nikolai V — 0-1 — Sochi RUS
1968 — Ek, Hans vs Gaprindashvili, Nona — 1-0 — Goteborg SWE
1968 — Shashin, Alexsander A vs Bokuchava, Alexander — 0-1 — ?
9.e3 — 6.8% (97 parties)
1964 — Forintos, Gyozo V vs Gheorghiu, Florin — 1/2-1/2 — Bordeaux FRA
1964 — Peterson, Andrejs vs Kholmov, Ratmir D — 0-1 — Kiev ch-URS
1970 — Maltsev, Leonid vs Pinchuk, Sergey T — 1-0 — ?
1973 — Marszalek, Rafal vs Doda, Zbigniew — 1/2-1/2 — Gdynia POL
1979 — Robertson, PC. vs Cafferty, Bernard — 0-1 — ?
9.b3 — 4.3% (62 parties)
1964 — Darga, Klaus vs Larsen, Bent Ravn — 0-1 — Hoogovens Beverwijk NED
1987 — Gruen, Gerd-Peter vs Wenzel, Reinhard — 1-0 — Muenster GER
1988 — Schulz, Klaus-Juergen vs Klundt, Klaus — 1/2-1/2 — Duitsland tt
1989 — Keitlinghaus, Ludger vs Haliamanis, Georgios — 1-0 — Athens GRE
1990 — Mattern, Markus vs Peterson, Emery — 1/2-1/2 — Polch