B68a - 9…Be7 - Richter-Rauzer

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B68a — Richter-Rauzer
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6 8.O-O-O Bd7 9.f4 Be7
Eval: [+0.39]
Les coups candidats
Ambassadeurs : Matsukevich, Vladimir Vladimirov (25x), Schneider, Lars-Ake (23x), Timman, Jan H (17x), Aigmueller, Max Ing (15x), Lukin, Andrei M (15x), Maki, Veijo (14x), Demchenko, Aleksandr (14x), ? (13x)
Ambassadeurs : Byrne, Ray (6x), Kavalek, Lubomir (4x), Mednis, Edmar J (4x), Jansa, Vlastimil (3x), Pandavos, Panayotis (3x), Hausner, Ivan (3x), Tahmassebi, Bijan (3x), Tahay, Alexis (3x)
10.Kb1 — 5.3% (185 parties)
Ambassadeurs : Lobanov, Sergei (3x), Demchenko, Aleksandr (3x), Stribuk, Artiom (3x), Riemersma, Li (2x), Schneider, Lars-Ake (2x), Popovic, Patrik (2x), Pinheiro, Iung Alicio de O. (2x), Tischbierek, Raj (2x)
10.Nb3 — 2.8% (97 parties)
Ambassadeurs : Ivanovic, Bozidar (3x), Popovic, Petar (3x), Bellin, Robert (2x), Ioseliani, Nana (2x), Gutenev, Alexander (2x), Van den Berg, Cees (1x), Stahlberg, Gideon (1x), Tumurbator, Purev (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 10.Nf3 10.Be2 10.Kb1 10.Nb3
<1800 39 62% 13% — 8%
1800-2200 694 65% 14% 7% 4%
2200-2600 2009 80% 8% 6% 3%
2600+ 94 86% 6% 4% 1%
Évolution par décennie (% des parties)
Décennie N parties 10.Nf3 10.Be2 10.Kb1 10.Nb3
1930s 1 100% — — —
1940s 6 50% 17% — —
1950s 91 85% 9% 1% 1%
1960s 139 81% 9% 1% 1%
1970s 300 74% 11% 1% 3%
1980s 279 80% 11% 2% 2%
1990s 398 70% 13% 5% 6%
2000s 476 74% 13% 7% 2%
2010s 832 74% 9% 7% 3%
2020s 958 79% 6% 8% 2%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
10.Nf3 74% 79% ▲ +5.1%
10.Be2 9% 6% ▼ -2.6%
10.Kb1 7% 8% ▲ +0.9%
10.Nb3 3% 2% ▼ -1.4%
Joueurs célèbres
Champions du monde dans cette position
Tal, Mikhail — 8 parties
Anand, Viswanathan — 3 parties
Ju, Wenjun — 3 parties
Karpov, Aleksandr — 2 parties
Botvinnik, Mikhail — 1 partie
Kasparov, Garry — 1 partie
Hou, Yifan — 1 partie
Ding, Liren — 1 partie
Carlsen, Magnus — 1 partie
Parties historiques
10.Nf3 — 76.1% (2647 parties)
1939 — Prins, Lodewijk vs Christensen, Alfred — 1-0 — Buenos Aires ARG
1948 — Alexander, Conol Hugh vs Wood, Gabriel — 0-1 — London, Bishopsgate
1948 — Anderson, Frank Ross vs Williams, J Noel — 0-1 — Toronto CAN
1949 — Unzicker, Wolfgang vs Mueller, Hans — 1/2-1/2 — Lucerne SUI
1950 — Ravinsky, Grigory vs Koblencs, Alexander — 1/2-1/2 — Leningard
10.Be2 — 9.5% (331 parties)
1949 — Sokolsky, A. vs Kopylov, Nikita — 0-1 — Moskou ch-URS
1954 — Cross, Robert Gary vs Grumette, L — 1-0 — Los Angeles, CA USA
1955 — Lapiken, Peter Petrovich vs Rossolimo, Nicolas — 1/2-1/2 — Long Beach, CA USA
1957 — Hanninen, Veikko vs Olafsson, Fridrik — 1/2-1/2 — Wageningen NED
1957 — Rodriguez Garcia, Jesus vs Franco Raymundo, Eduardo — 0-1 — Zaragoza
10.Kb1 — 5.3% (185 parties)
1956 — Keres, Paul Petrovich vs Ciocaltea, Victor — 1/2-1/2 — Moscow RUS
1962 — Cobo Arteaga, Eldis vs Perez Perez, Francisco Jose — 1/2-1/2 — Havana CUB
1976 — Borm, Frans vs Agur, Elieser — 1/2-1/2 — Velp NED
1979 — Sokolowski, Stanislaw vs Klaput, Edward — 0-1 — Bydgoszcz POL
1982 — Cordovil, Joao vs Santos, Luis — 0-1 — Mangualde
10.Nb3 — 2.8% (97 parties)
1959 — Tumurbator, Purev vs Malich, Burkhard, Dr. — 0-1 — Budapest HUN
1963 — Van den Berg, Cees vs Stahlberg, Gideon — 1/2-1/2 — Beverwijk NED
1963 — Pietzsch, Wolfgang vs Cuijpers, Frans Andre — 1-0 — Moscow RUS
1971 — Kozlov, Vladimir N vs Lepeshkin, Vladimir — 1-0 — USSR
1972 — Tarjan, James vs Bellin, Robert — 1-0 — Norwich ENG