B59f - 7…Be7 8.O-O - Boleslavsky (1949)

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B59f — Boleslavsky (1949)
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 e5 7.Nb3 Be7 8.O-O
Les coups candidats
Ambassadeurs : Pilnik, Herman (13x), Janosevic, Dragoljub (11x), Unzicker, Ferdinand, Dr. (9x), Paoli, Enrico (9x), Upton, Timothy J (8x), Benko, Pal (6x), Sulek, Viliam (6x), Bisguier, Arthur B (5x)
8…a5 — 4.1% (131 parties)
Ambassadeurs : Barden, Leonard (3x), Gara, Ticia (3x), Wagner-Michel, Annett (3x), Wcislo, Damian (3x), Malich, Burkhard, Dr. (2x), Belic, Jordanka (2x), Biros, Robert (2x), Penrose, Jonathan (1x)
8…Be6 — 4.0% (128 parties)
Ambassadeurs : Yanik, Mehmet (2x), Fridvalszki, Richard (2x), Roos, Louise (2x), Havelka, Josef (2x), Johner, Hans (1x), Leinweber, Thaddaeus (1x), Clarke, Peter (1x), Wade, Robert G (1x)
8…a6 — 0.4% (14 parties)
Ambassadeurs : Pomar Salamanca, Arturo (2x), Barlocco, Carlo (2x), Ayala, Asensio (1x), Unzicker, Ferdinand, Dr. (1x), Schweber, Samuel (1x), Rodriguez, Alberto (1x), Fischer, Robert (1x), Walter, Berthold (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 8…O-O 8…a5 8…Be6 8…a6
<1800 135 85% 3% 8% 2%
1800-2200 1283 88% 5% 5% 1%
2200-2600 1235 94% 4% 2% 0%
2600+ 15 100% — — —
Évolution par décennie (% des parties)
Décennie N parties 8…O-O 8…a5 8…Be6 8…a6
1950s 136 90% 5% 3% 1%
1960s 70 96% 1% 1% 1%
1970s 116 91% 3% 5% —
1980s 285 95% 2% 2% 0%
1990s 710 91% 4% 4% 0%
2000s 935 90% 5% 4% 0%
2010s 772 90% 5% 4% 0%
2020s 164 89% 2% 7% 1%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
8…O-O 90% 89% ▼ -1.0%
8…a5 5% 2% ▼ -2.7%
8…Be6 4% 7% ▲ +2.7%
8…a6 0% 1% +0.2%
Joueurs célèbres
Champions du monde dans cette position
Tal, Mikhail — 4 parties
Kasparov, Garry — 3 parties
Botvinnik, Mikhail — 2 parties
Anand, Viswanathan — 2 parties
Hou, Yifan — 2 parties
Ju, Wenjun — 2 parties
Karpov, Anatoly — 1 partie
Carlsen, Magnus — 1 partie
Parties historiques
8…O-O — 91.0% (2900 parties)
1950 — Paoli, Enrico vs Baldanello, Mario — 1-0 — ?
1950 — Khasin, Abram vs Kopilov, Nikolay Georgiyevich — 1/2-1/2 — Leningard
1950 — Stumpers, Louis vs Spanjaard, Eduard — 1-0 — Amsterdam ch-NED
1950 — Lavrinenko, Aleksandr vs Tal, Mikhail — 0-1 — Riga LAT
1950 — Bisguier, Arthur B vs Ivkov, Borislav — 1/2-1/2 — USA
8…a5 — 4.1% (131 parties)
1950 — Penrose, Jonathan vs Barden, Leonard — 1/2-1/2 — Hastings ENG
1951 — Vasconcellos, Fernando O vs De Souza Mendes, Joao — 0-1 — Mar del Plata ARG
1952 — Pilnik, Herman vs Kottnauer, Cenek — 1/2-1/2 — Budapest HUN
1954 — Anderson, PB. vs Copping, Arthur David William — 1-0 — Nottingham ch-BCF
1954 — Wade, Robert G vs Barden, Leonard — 0-1 — Nottingham ch-BCF
8…Be6 — 4.0% (128 parties)
1952 — De Haas, Jessica vs Elfferich, H. — 0-1 — Netherlands tt
1953 — Pilnik, Herman vs Gligoric, Sofija — 1/2-1/2 — Mar del Plata ARG
1957 — Johner, Hans vs Leinweber, Thaddaeus — 1/2-1/2 — Bern SUI
1959 — Clarke, Peter vs Wade, Robert G — 1/2-1/2 — Bognor Regis
1961 — Pfleger, Helmut, Dr. vs Clemens, Christian, Dr. — 0-1 — Hitzacker
8…a6 — 0.4% (14 parties)
1958 — Unzicker, Ferdinand, Dr. vs Pomar Salamanca, Arturo — 1/2-1/2 — Munich GER
1959 — Ayala, Asensio vs Pomar Salamanca, Arturo — 0-1 — Santa Cruz de Tenerife
1965 — Schweber, Samuel vs Rodriguez, Alberto — 0-1 — Buenos Aires ch-ARG
1988 — Fischer, Robert vs Barlocco, Carlo — 1/2-1/2 — Mendrisio SUI
1996 — Krumm, Johannes vs Barlocco, Carlo — 1/2-1/2 — Italy