E92q - 7…a5 - Stein Defense (1923)

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E92q — Petrosian Variation, Stein Defense (1923)
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.d5 a5
Les coups candidats
Ambassadeurs : Naumkin, Igor (79x), Laketic, Gojko (43x), Clares Huanca, Danner Saed (35x), Lugovoi, Aleksei (27x), Socko, Monika (18x), Narciso Dublan, Marc (18x), Kaniansky, Miroslav (18x), Polak, Tomas (17x)
8.O-O — 20.9% (2224 parties)
Ambassadeurs : Clares Huanca, Danner Saed (23x), Kolanek, Roman (21x), Reede, Arvo (15x), Huss, Andreas (12x), Abanin, Vladimir (11x), Happel, Henk (11x), Franco Ocampos, Zenon (9x), Basson, Heinrich (8x)
Ambassadeurs : Zvjaginsev, Vadim (18x), Vosselman, Jan (18x), Postny, Evgeny (16x), Kempinski, Robert (15x), Hausrath, Daniel (10x), Mista, Aleksander (8x), Rahul Srivatshav P (8x), Ivanov, Mikhail M. (7x)
8.Be3 — 6.6% (705 parties)
Ambassadeurs : Clares Huanca, Danner Saed (17x), Huss, Andreas (16x), Nikolaidis, Ioannis NA (9x), Kumaran, Dharshan (8x), Khenkin, Igor (8x), Kljucharev, Sergey (8x), Wagner, Dinara (7x), Loginov, Valery A (6x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 8.Bg5 8.O-O 8.h3 8.Be3
<1800 542 39% 38% 9% 5%
1800-2200 4001 54% 27% 8% 5%
2200-2600 4921 66% 11% 11% 8%
2600+ 108 63% 6% 17% 11%
Évolution par décennie (% des parties)
Décennie N parties 8.Bg5 8.O-O 8.h3 8.Be3
1950s 6 — 100% — —
1960s 70 61% 30% 4% 4%
1970s 164 48% 40% — 7%
1980s 392 61% 25% 4% 5%
1990s 2666 62% 15% 11% 6%
2000s 2627 57% 23% 7% 5%
2010s 3615 58% 24% 8% 7%
2020s 1112 51% 16% 17% 14%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
8.Bg5 58% 51% ▼ -6.5%
8.O-O 24% 16% ▼ -8.0%
8.h3 8% 17% ▲ +9.0%
8.Be3 7% 14% ▲ +7.4%
Joueurs célèbres
Champions du monde dans cette position
Kasparov, Garry — 10 parties
Kramnik, Vladimir — 10 parties
Tal, Mikhail — 1 partie
Ju, Wenjun — 1 partie
Karpov, Anatoly — 1 partie
Botvinnik, Mikhail — 1 partie
Ding, Liren — 1 partie
Anand, Viswanathan — 1 partie
Parties historiques
8.Bg5 — 57.7% (6148 parties)
1960 — Szabo, Laszlo vs Ciocaltea, Victor — 1-0 — Bucharest ROU
1960 — Benko, Pal vs Weinstein, Raymond — 0-1 — New York Metropolita
1961 — Rossetto, Hector vs Moyano, Marco — 1-0 — Balcarce
1961 — Petrosian, Tigran V. vs Lutikov, Anatoly S — 1-0 — Moskou
1961 — Schroeder, Ruperto vs Pilnik, Herman — 1/2-1/2 — Santiago de Chile
8.O-O — 20.9% (2224 parties)
1955 — Makarczyk, Kazimierz vs Alster, Ladislav — 1/2-1/2 — Prague tm Prague CZE
1955 — Franz, Joachim vs Eising, Johannes — 1/2-1/2 — Zittau GER
1957 — Simagin, Vladimir vs Ilivitsky, Georgy A — 1/2-1/2 — Sverdlovsk
1958 — Johannsson, Ingi R vs Czerniak, Moshe — 1/2-1/2 — Munich GER
1958 — Pachman, Ludek vs Rapaka Samuel Paul — 0-1 — Munchen olm
8.h3 — 9.4% (997 parties)
1966 — Aloni, Itzchak vs Stepak, Yedael — 1/2-1/2 — Tel Aviv ISR
1967 — Toth, Bela vs Barczay, Laszlo — 1/2-1/2 — HUN-ch Budapest HUN
1969 — Bustos, Cristian vs Rubinetti, Jorge — 0-1 — Villa Gesell ARG
1982 — Pangrazzi, Marco vs Bouaziz, Slim — 1/2-1/2 — Rome ITA
1983 — Kovacs, Lajos D vs Martorelli, Antonio — 0-1 — Banco di Roma
8.Be3 — 6.6% (705 parties)
1969 — Hort, Vlastimil vs Ostojic, Predrag — 1-0 — Monte Carlo MNC
1969 — Fuller, Maxwell Leonard vs Littlewood, John E — 1/2-1/2 — Rhyl ch-BCF
1969 — Wade, Robert G vs De Paiva, Hortencia Duarte — 1-0 — Rhyl ch-BCF
1970 — Petrosian, Tigran V. vs Quinteros, Miguel A. — 1/2-1/2 — Vinkovci CRO
1970 — Petrosian, Tigran V. vs Quinteros, Miguel A. — 1/2-1/2 — Vinkovci CRO