A90x - 7.b3 (1937)

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A90x —
1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 c6 5.Nf3 d5 6.O-O Bd6 7.b3
Les coups candidats
7…Qe7 — 79.8% (5039 parties)
Ambassadeurs : Gleizerov, Evgeny (44x), Ulybin, Mikhail (31x), Moskalenko, Viktor (31x), Vaisser, Anatoli (27x), Prokopp, Heinz (21x), Chylik, Rudolf (18x), Jussupow, Artur (16x), Keitlinghaus, Ludger (14x)
7…O-O — 17.2% (1084 parties)
Ambassadeurs : Charochkina, Daria (8x), Llagaria Vidal, Eduardo (5x), Qi, Jingxuan (3x), Nickoloff, Bryon (3x), Bukvic, Mihailo (3x), Puiggros, Guillermo (2x), Hoen, Ragnar Harald (2x), Makarov, Arkady Alexandrovic (2x)
7…Nbd7 — 1.6% (98 parties)
Ambassadeurs : Llagaria Vidal, Eduardo (7x), Krol, Wladyslaw (3x), Harzer, Paul (2x), Birkholz, Hans Joachim (1x), Muehlberg, Siegfried (1x), Loftsson, Julius H (1x), Thacker, Ronald S (1x), Benko, Francisco (1x)
7…b6 — 0.4% (24 parties)
Ambassadeurs : Bricard, Emmanuel (2x), Harestad, Thor Geir (1x), Agdestein, Espen (1x), Van Wely, Loek (1x), Djurhuus, Rune (1x), Zimmermann, Martin (1x), Bloess, Andre (1x), Sabatini, Carlo (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 7…Qe7 7…O-O 7…Nbd7 7…b6
<1800 265 59% 34% 5% 1%
1800-2200 2684 74% 23% 2% 0%
2200-2600 2808 90% 8% 0% 0%
2600+ 50 96% 4% — —
Évolution par décennie (% des parties)
Décennie N parties 7…Qe7 7…O-O 7…Nbd7 7…b6
1950s 25 40% 48% 12% —
1960s 17 41% 53% 6% —
1970s 30 50% 37% 10% —
1980s 359 88% 10% 1% 1%
1990s 1375 83% 15% 1% 0%
2000s 1742 80% 17% 2% 0%
2010s 2369 78% 19% 2% 1%
2020s 398 80% 18% 2% —
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
7…Qe7 78% 80% ▲ +1.7%
7…O-O 19% 18% ▼ -0.7%
7…Nbd7 2% 2% +0.2%
7…b6 1% 0% ▼ -0.5%
Joueurs célèbres
Champions du monde dans cette position
Botvinnik, Mikhail — 3 parties
Kramnik, Vladimir — 3 parties
Carlsen, Magnus — 3 parties
Tal, Mikhail — 1 partie
Kasparov, Garry — 1 partie
Ju, Wenjun — 1 partie
Anand, Viswanathan — 1 partie
Gukesh D — 1 partie
Hou, Yifan — 1 partie
Parties historiques
7…Qe7 — 79.8% (5039 parties)
1951 — Andrich, Alexander vs Ivkov, Bojidar — 0-1 — Sarajevo BIH
1951 — Ilivitsky, Georgy A vs Abanin, Vladimir — 1-0 — Sverdlovsk
1952 — Gadalinski, Jan vs Szymanski, Aleksander — 0-1 — Katowice POL
1954 — Borisenko, Georgy K vs Shamaev, Leonid — 1/2-1/2 — Leningrad RUS
1955 — Zvorykina, Kira Alekseyevna vs Lazarevic, Mihailo — 1-0 — Moscow ct
7…O-O — 17.2% (1084 parties)
1950 — Golombek, Harry vs Castillo Bermudez, Manuel — 1-0 — Venice ITA
1951 — Kovacs, MG. vs Canal, Esteban — 1/2-1/2 — Vienna AUT
1951 — Giustolisi, Alberto vs Sanz, Joel — 1-0 — Madrid ESP
1952 — Rossetto, Hector vs Puiggros, Guillermo — 1-0 — Mar del Plata ARG
1953 — Vidmar, Milan Jr vs Porreca, Giorgio — 1/2-1/2 — Opatija
7…Nbd7 — 1.6% (98 parties)
1954 — Birkholz, Hans Joachim vs Harzer, Paul — 0-1 — Schkopau
1954 — Muehlberg, Siegfried vs Harzer, Paul — 1/2-1/2 — Schkopau
1958 — Benko, Francisco vs Puiggros, Guillermo — 0-1 — Buenos Aires ARG
1960 — Loftsson, Julius H vs Thacker, Ronald S — 1/2-1/2 — ?
1970 — Andersen, Morten Kamp vs Leighton, G. — 0-1 — Chicago, IL USA
7…b6 — 0.4% (24 parties)
1988 — Van Wely, Loek vs Djurhuus, Rune — 0-1 — Arnhem ech-jr
1989 — Harestad, Thor Geir vs Agdestein, Espen — 1-0 — Stavanger NOR
1997 — Zimmermann, Martin vs Bloess, Andre — 1-0 — GER
1997 — Campos Moreno, Javier B. vs Arizmendi Martinez, Julen Luis — 1-0 — Mondariz ESP
1998 — Sabatini, Carlo vs Dorighet, Claudio — 0-1 — Robecchetto