B83n - 11.a4 - Scheveningen, Modern (1925)

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B83n — Scheveningen, Modern (1925)
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 Nc6 7.O-O Be7 8.Be3 O-O 9.f4 Bd7 10.Nb3 a6 11.a4
Les coups candidats
11…b6 — 42.5% (309 parties)
Ambassadeurs : Mozny, Milos (7x), Savereide, Diane (5x), Pritchett, Craig W (5x), Schoeneberg, Manfred (5x), Truman, Richard G (4x), Kapengut, Albert (3x), Prandstetter, Eduard (3x), Gomez Baillo, Jorge H. (3x)
11…Na5 — 28.3% (206 parties)
Ambassadeurs : Espig, Lutz (11x), Boensch, Uwe (4x), Westerinen, Heikki M.J. (3x), Anikaev, Yuri N (3x), Tukmakov, Vladimir B (3x), Mamedyarov, Shakhriyar (3x), Laznicka, Viktor (3x), Moehring, Guenther (2x)
11…Rc8 — 11.0% (80 parties)
Ambassadeurs : Cebalo, Miso (6x), Djurhuus, Rune (2x), Torre, Eugenio (2x), Gheorghiu, Florin (2x), Maus, Siegfried (2x), Sarenac, Matija (1x), Kovacevic, Milorad A (1x), Pritchett, Craig W (1x)
11…Nb4 — 6.7% (49 parties)
Ambassadeurs : Sanakoev, Grigory (2x), Dobierzin, Olaf (2x), Rittner, Horst (1x), Ilievski, Dimitar (1x), Gligoric, Sofija (1x), Geller, Efim P. (1x), Bukic, Enver (1x), Lambert, Grant R (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 11…b6 11…Na5 11…Rc8 11…Nb4
<1800 35 37% 17% 23% —
1800-2200 204 39% 26% 11% 8%
2200-2600 364 46% 31% 10% 6%
2600+ 19 32% 53% 5% —
Évolution par décennie (% des parties)
Décennie N parties 11…b6 11…Na5 11…Rc8 11…Nb4
1960s 11 27% 45% — 27%
1970s 93 53% 32% 3% 6%
1980s 90 62% 20% 8% 7%
1990s 159 46% 25% 12% 8%
2000s 174 38% 30% 14% 5%
2010s 176 31% 33% 14% 6%
2020s 24 33% 17% 8% 12%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
11…b6 31% 33% ▲ +2.7%
11…Na5 33% 17% ▼ -16.3%
11…Rc8 14% 8% ▼ -5.9%
11…Nb4 6% 12% ▲ +6.8%
Joueurs célèbres
Champions du monde dans cette position
Hou, Yifan — 3 parties
Tal, Mikhail — 1 partie
Kasparov, Garry — 1 partie
Karpov, Anatoly — 1 partie
Anand, Viswanathan — 1 partie
Parties historiques
11…b6 — 42.5% (309 parties)
1966 — Haag, Ervin vs Varnusz, Egon — 0-1 — HUN
1967 — Mertens, Paul vs Stork, Christopher — 0-1 — Harrachov
1968 — Maeder, Karl-Heinz vs Lombard, Andre — 1-0 — Groningen NED
1970 — Mecking, Henrique vs Tukmakov, Vladimir B — 1/2-1/2 — Buenos Aires ARG
1972 — Gaprindashvili, Nona vs Kushnir Aleksandr — 0-1 — Riga wch-m
11…Na5 — 28.3% (206 parties)
1967 — Schmidt, Wlodzimierz vs Moehring, Guenther — 0-1 — Varna BUL
1969 — Tesic, Radenko vs Anay Barche — 0-1 — Vrsac SRB
1969 — Maeder, Karl-Heinz vs Schroeder, Hannes — 0-1 — Frankfurt GER
1969 — Zhukhovitsky, Samuel vs Tukmakov, Vladimir B — 1-0 — Moskou ch-URS
1969 — Kapengut, Albert vs Malich, Burkhard, Dr. — 0-1 — Schwedt/Oder
11…Rc8 — 11.0% (80 parties)
1975 — Pritchett, Craig W vs Hartston, William R — 0-1 — Morecambe ch-BCF
1976 — Thall, Andrew S vs Byanasaye Enrique Williams — 1-0 — Gem City Open,OH
1979 — Jaster, Robert, Prof. Dr. vs Teske, Henrik — 0-1 — DDR jr
1980 — Sarenac, Matija vs Kovacevic, Milorad A — 1-0 — corr YUG Mkl
1981 — Torre, Eugenio vs Gheorghiu, Florin — 1/2-1/2 — Moskou
11…Nb4 — 6.7% (49 parties)
1967 — Geller, Efim P. vs Bukic, Enver — 1-0 — Skopje MKD
1968 — Rittner, Horst vs Sanakoev, Grigory — 1/2-1/2 — corr Wch6
1968 — Ilievski, Dimitar vs Gligoric, Sofija — 0-1 — Skopje MKD
1970 — Suetin, Alexey S vs Tukmakov, Vladimir B — 1/2-1/2 — ?
1970 — Ruckschloss, Karol vs Plhal, Petr — 1-0 — Harrachov