D87b - 9.Be3 - Classical Exchange (1931)

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D87b — Classical Exchange (1931)
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.Be3
Les coups candidats
Ambassadeurs : Loderbauer, Gerhard (12x), Dorner, Joaquin (11x), Knaak, Rainer (10x), Marin, Mihail (8x), Kniest, Oliver (7x), Shirov, Alexei (5x), Blees, Albert (5x), Browne, Walter Shawn (5x)
9…cxd4 — 17.1% (512 parties)
Ambassadeurs : Tylecek, Drahomir (6x), Klee, Mario (3x), Rettler, Heinz (3x), Prahov, Valentin (3x), Nass, Walter Robert (2x), Mihaljevic, Josip (2x), Schleifer, Michael (2x), Berg, Michael (2x)
Ambassadeurs : Hajek, Lukas (3x), Lopez Rodriguez, Fernando (2x), Engelen, Mark (2x), Balicki, Jeff (2x), Subrt, Jaroslav (1x), Ferenc, Peter (1x), Berube, Richard (1x), Dorion, Francois (1x)
9…Qc7 — 3.7% (111 parties)
Ambassadeurs : Cordioli, Jairo Ribeiro (2x), Shaw, Jack F (1x), Sherwin, James T (1x), Norton, PJ. (1x), Donnelly, Mike J Dr (1x), Bjerring, Kai (1x), Moe, Mogens (1x), Elzerman, Jaap (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 9…Nc6 9…cxd4 9…Qa5 9…Qc7
<1800 218 61% 19% 10% 6%
1800-2200 1515 70% 19% 5% 4%
2200-2600 717 85% 9% 1% 3%
2600+ 26 92% 4% — 4%
Évolution par décennie (% des parties)
Décennie N parties 9…Nc6 9…cxd4 9…Qa5 9…Qc7
1950s 12 17% 50% — 8%
1960s 19 53% 37% 5% 5%
1970s 66 73% 20% — 8%
1980s 173 75% 16% 2% 5%
1990s 693 74% 17% 5% 2%
2000s 979 72% 18% 5% 3%
2010s 843 70% 18% 6% 4%
2020s 202 81% 7% 3% 7%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
9…Nc6 70% 81% ▲ +11.0%
9…cxd4 18% 7% ▼ -10.6%
9…Qa5 6% 3% ▼ -3.3%
9…Qc7 4% 7% ▲ +3.2%
Joueurs célèbres
Champions du monde dans cette position
Anand, Viswanathan — 3 parties
Carlsen, Magnus — 3 parties
Gukesh D — 2 parties
Parties historiques
9…Nc6 — 72.5% (2165 parties)
1952 — Milic, Borislav vs Porreca, Alessio — 1-0 — Belgrade SRB
1958 — Toerber, Claus vs Schwarze, Werner — 1-0 — Bielefeld
1960 — Lubienski, Tadeusz vs Witkowski, Stefan — 1/2-1/2 — Poland ch
1962 — Reina, Mike vs Andrew Earnest P — 0-1 — ?
1964 — Rasmussen, Gudmund vs Abdou, William — 0-1 — California
9…cxd4 — 17.1% (512 parties)
1951 — Bannik, Anatolij vs Novotelnov, Nikolai — 0-1 — URS-chT Tbilisi GEO
1952 — Kramer, Hanspeter vs Yanofsky, Daniel Abraham — 0-1 — Beverwijk NED
1954 — Sliwa, Bogdan vs Pachman, Ludek — 0-1 — Bucharest ROU
1955 — Kovacs, Zoltan vs Pilnick, Carl — 1/2-1/2 — ?
1957 — Khodakov, Leonid vs Nuzhdin, N — 0-1 — ?
9…Qa5 — 4.7% (141 parties)
1966 — Subrt, Jaroslav vs Ferenc, Peter — 0-1 — Prague CZE
1981 — Berube, Richard vs Dorion, Francois — 1/2-1/2 — Quebec CAN
1983 — Knaak, Rainer vs Ghinda, Mihail-Viorel — 1/2-1/2 — Tt GDR-ROM Zinnowitz GER
1987 — Leuner, H. vs Szulnis, Malgorzata — 1/2-1/2 — Chorzow
1990 — Peltonen, Bengt vs Harkonen, Esa — 1-0 — Kuopio
9…Qc7 — 3.7% (111 parties)
1956 — Shaw, Jack F vs Sherwin, James T — 0-1 — Oklahoma City, OK USA
1969 — Norton, PJ. vs Donnelly, Mike J Dr — 1-0 — Rhyl
1972 — Bevilacqua, Giacomo vs Comune, F. — 0-1 — Cava de Tirreni
1975 — Gil Matilla, Constantino vs Carretero Ajo, Jesus — 1/2-1/2 — Valladolid
1975 — Kertesz, Alfred vs Groza, Viorel — 1-0 — Zalau