D87e - 9.O-O - Classical Exchange (1935)

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D87e — Classical Exchange (1935)
1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 c5 9.O-O
Les coups candidats
Ambassadeurs : Bobel, Philippe (26x), Lukacs, Peter (18x), Jansa, Vlastimil (18x), Knaak, Rainer (17x), Packroff, Hermann (17x), Schmidt, Wlodzimierz (16x), Korchnoi, Viktor (16x), Kudrin, Sergey (15x)
9…cxd4 — 9.9% (780 parties)
Ambassadeurs : Tylecek, Drahomir (19x), Prahov, Valentin (4x), Naumkin, Igor (4x), Ilivitsky, Georgy A (3x), Byvshev, Vasily (3x), Spassky, Boris V. (3x), Rise, Hallvard (3x), Liptay, Laszlo Dr. (2x)
9…Qc7 — 2.2% (169 parties)
Ambassadeurs : Conings, Jos (2x), Herdlitschka (2x), Gligoric, Sofija (1x), Wexler, Bernardo (1x), Koltanowski, George (1x), ? (1x), Kramer, Haije (1x), Van den Bosch, Johannes (1x)
9…Nd7 — 1.2% (94 parties)
Ambassadeurs : Gutman, Lev (3x), Averbakh, Yuri L (2x), Bronstein, David I (2x), Botvinnik, Mikhail (2x), Sagitov, Edward (2x), Liu, Xiangyi (2x), Cafiero, Michael (1x), Studenetzky, Moises (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 9…Nc6 9…cxd4 9…Qc7 9…Nd7
<1800 412 78% 15% 3% 2%
1800-2200 3247 83% 12% 3% 1%
2200-2600 2520 93% 4% 1% 1%
2600+ 120 98% 2% — 1%
Évolution par décennie (% des parties)
Décennie N parties 9…Nc6 9…cxd4 9…Qc7 9…Nd7
1950s 100 38% 44% 6% 11%
1960s 129 66% 26% 2% 4%
1970s 373 86% 10% 2% 1%
1980s 734 90% 7% 2% 1%
1990s 1325 84% 11% 2% 1%
2000s 2251 85% 11% 2% 1%
2010s 2325 87% 8% 3% 1%
2020s 609 90% 5% 2% 0%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
9…Nc6 87% 90% ▲ +3.5%
9…cxd4 8% 5% ▼ -3.1%
9…Qc7 3% 2% -0.5%
9…Nd7 1% 0% -0.5%
Joueurs célèbres
Champions du monde dans cette position
Botvinnik, Mikhail — 5 parties
Tal, Mikhail — 3 parties
Kramnik, Vladimir — 3 parties
Carlsen, Magnus — 3 parties
Kasparov, Garry — 2 parties
Gukesh D — 2 parties
Karpov, Anatoly — 1 partie
Anand, Viswanathan — 1 partie
Parties historiques
9…Nc6 — 85.5% (6707 parties)
1950 — Furman, Albert vs Dubinin, Peter — 1-0 — USSR
1950 — Aguayo, Cesar vs Paoli, Enrico — 0-1 — Venice ITA
1950 — Gligoric, Svetozar vs Skold, Kristian — 1-0 — Dubrovnik olm
1950 — Castillo Bermudez, Manuel vs Paoli, Enrico — 1-0 — Venice ITA
1950 — Tartakower, Savielly vs Milic, Borislav — 1/2-1/2 — Bled SLO
9…cxd4 — 9.9% (780 parties)
1950 — Krylov, Aleksandr vs Kozma, Edit — 1-0 — Presov SVK
1950 — Bronstein, David I vs Boleslavsky, Isaac — 1-0 — Moscow RUS
1950 — Opocensky, Karel vs Kozma, Julius — 1-0 — ?
1950 — Vistaneckis, Isakas vs Averbakh, Yuri L — 0-1 — Ch URS /2 final)
1951 — Efimov, Kondrat vs Averbakh, Yuri L — 1-0 — URS-ch sf Sverdlovsk
9…Qc7 — 2.2% (169 parties)
1950 — Letelier, Rene vs Nestler, Vincenzo — 1-0 — Venice ITA
1952 — Prosdocimi, Arrigo vs Tavares da Silva, Luiz — 1-0 — Sao Paulo BRA
1953 — Koltanowski, George vs ? — 1-0 — Birsfelden,SWZ simul
1954 — Kramer, Haije vs Van den Bosch, Johannes — 1/2-1/2 — Amsterdam NED
1955 — Ravinsky, Grigory vs Gusev, Yuri — 1/2-1/2 — Moscow RUS
9…Nd7 — 1.2% (94 parties)
1950 — Borisenko, Georgy K vs Lilienthal, Andor — 1/2-1/2 — Tula RUS
1950 — Ilivitsky, Georgy A vs Averbakh, Yuri L — 1/2-1/2 — URS-ch sf Tula
1950 — Fridstein, Grigory vs Averbakh, Yuri L — 0-1 — URS-ch sf Tula
1951 — Brown, Bertram Goulding vs Teschner, Rudolf — 0-1 — Southsea
1951 — Letelier Martner, Rene vs Eliskases, Erich — 1-0 — Mar del Plata ARG