E97z - 8.d5 Ne7 9.Nd2 a5 10.a3 Nd7 11.Rb1 f5 12.b4 - Mar del Plata

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E97z — Mar del Plata
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 9.Nd2 a5 10.a3 Nd7 11.Rb1 f5 12.b4
Les coups candidats
12…Kh8 — 75.9% (1358 parties)
Ambassadeurs : Gleizerov, Evgeny (22x), Epishin, Vladimir (16x), Lputian, Smbat (16x), Chuchelov, Vladimir (16x), Ulybin, Mikhail (14x), Kasparov, Garry (13x), Gelfand, Boris (13x), Dolmatov, Sergey (12x)
12…axb4 — 14.4% (258 parties)
Ambassadeurs : Solonar, Stefan (5x), Harestad, Hans Krogh (4x), Doroshkievich, Vladimir K (3x), Whiteley, Andrew J (3x), Farago, Ivan (2x), Antunac, Goran (2x), Sznapik, Aleksander (2x), Timoscenko, Gennadij (2x)
12…b6 — 4.5% (80 parties)
Ambassadeurs : Mortensen, Erling (2x), Spraggett, Kevin (2x), Blees, Albert (2x), Riemersma, Li (2x), Berg, Klaus (2x), Kasparov, Garry (2x), Petrakov, A. (2x), Farago, Ivan (2x)
12…Nf6 — 4.2% (75 parties)
Ambassadeurs : Ulybin, Mikhail (4x), Nikolaidis, Ioannis NA (2x), Shabalov, Alexander (2x), Guerra Navarro, Pablo (1x), Rodriguez Talavera, Juan Carlos (1x), Dautov, Rustem (1x), Ubilava, Elizbar (1x), Schaufelberger, Heinz (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 12…Kh8 12…axb4 12…b6 12…Nf6
<1800 10 80% 10% 10% —
1800-2200 302 66% 22% 6% 5%
2200-2600 1037 77% 15% 3% 4%
2600+ 89 94% 2% 2% 1%
Évolution par décennie (% des parties)
Décennie N parties 12…Kh8 12…axb4 12…b6 12…Nf6
1970s 8 — 50% 38% 12%
1980s 108 56% 19% 21% 2%
1990s 991 80% 11% 4% 4%
2000s 437 78% 16% 2% 3%
2010s 228 69% 20% 4% 6%
2020s 18 56% 28% 6% 11%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
12…Kh8 69% 56% ▼ -13.3%
12…axb4 20% 28% ▲ +7.6%
12…b6 4% 6% ▲ +2.0%
12…Nf6 6% 11% ▲ +5.0%
Joueurs célèbres
Champions du monde dans cette position
Kasparov, Garry — 10 parties
Karpov, Anatoly — 3 parties
Kramnik, Vladimir — 2 parties
Ju, Wenjun — 2 parties
Karpov, Aleksandr — 1 partie
Ding, Liren — 1 partie
Parties historiques
12…Kh8 — 75.9% (1358 parties)
1985 — Prystenski, Arthur vs Talbot, Gerard — 1/2-1/2 — Canada corr
1987 — Rashkovsky, Nukhim N vs Loginov, Valery A — 1/2-1/2 — Tashkent UZB
1987 — Dokhoian, Yury vs Loginov, Valery A — 0-1 — Pavlodar
1988 — Ftacnik, Lubomir vs Nunn, John D M — 1/2-1/2 — Groningen Groningen NED
1988 — Ruzele, Darius vs Kuzmin, Alexey — 0-1 — Blagoveshchensk
12…axb4 — 14.4% (258 parties)
1971 — Schauwecker, Meinrad vs Biriescu, Ioan — 1/2-1/2 — Groningen NED
1975 — Vaganian, Rafael A vs Doroshkievich, Vladimir K — 1-0 — Erevan ch-URS
1979 — Antunac, Goran vs Sznapik, Aleksander — 1/2-1/2 — Zagreb CRO
1979 — Antunac, Goran vs Sznapik, Aleksander — 1/2-1/2 — Zagreb CRO
1981 — Vilela De Acuna, Jose Luis vs Pavlov, Mircea-Sergiu-Aurelian — 1/2-1/2 — Halle GER
12…b6 — 4.5% (80 parties)
1972 — Langeweg, Kick vs Savon, Vladimir — 1/2-1/2 — Wijk aan Zee NED
1974 — Sosonko, Gennadi vs Ligterink, Gert — 1/2-1/2 — Leeuwarden ch-NED
1978 — Vilela De Acuna, Jose Luis vs Rodriguez Cespedes, Amador — 1-0 — Cuba
1980 — Magerramov, Elmar vs Kengis, Edvins — 0-1 — Riga LAT
1983 — Odendahl, Steven vs Spraggett, Kevin — 1-0 — Can. Open, Toronto
12…Nf6 — 4.2% (75 parties)
1970 — Schaufelberger, Heinz vs Toran Albero, Roman — 0-1 — Malaga ESP
1989 — Guerra Navarro, Pablo vs Rodriguez Talavera, Juan Carlos — 0-1 — Seville ESP
1989 — Dautov, Rustem vs Ubilava, Elizbar — 1-0 — Daugavpils LAT
1990 — Shirov, Alexei vs Ivanovic, Bozidar — 1-0 — Manila PHI
1990 — Schoeneberg, Guenter vs Lausch, S. — 1-0 — corr WT/M