C92b - 9…a5 - Closed Keres Variation [+0.63]

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C92b — Closed Keres Variation
1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d6 9.h3 a5
Eval: [+0.63]
Les coups candidats
10.d4 — 50.0% (248 parties)
Ambassadeurs : Romanishin, Oleg M (11x), Kvisla, Johannes Luangtep (5x), Keres, Paul Petrovich (4x), Hebden, Mark L (4x), Semcesen, Daniel (4x), Estrin, Yakov (3x), Keres, Paul (3x), Smyslov, Vasily (3x)
10.a4 — 30.8% (153 parties)
Ambassadeurs : Kotan, Ladislav (9x), Zaitsev, Igor A (5x), Blatny, Pavel (4x), Kupreichik, Viktor D (3x), Hansen, Lars Bo (3x), Rajdeep Sarkar (3x), Isaksson, Sten (2x), Pietzsch, Wolfgang (2x)
10.d3 — 15.3% (76 parties)
Ambassadeurs : Smagin, Sergey (3x), Zaitsev, Igor A (3x), Blatny, Pavel (3x), Payen, Arnaud (3x), Fischer, Robert J (2x), Sherwin, James T (2x), Kupreichik, Viktor D (2x), Wolff, Patrick G (2x)
10.a3 — 3.2% (16 parties)
Ambassadeurs : Hansen, Lars Bo (2x), Justin, Matjaz (1x), Lazovic, Gordan (1x), Kwiatkowski, Feliks J (1x), Lane, Gary W (1x), ? (1x), Tyni, Jukka-Pekka (1x), Giaccio, Alfredo (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 10.d4 10.a4 10.d3 10.a3
<1800 4 75% 25% — —
1800-2200 75 56% 31% 11% 3%
2200-2600 312 46% 32% 17% 4%
2600+ 12 83% 8% 8% —
Évolution par décennie (% des parties)
Décennie N parties 10.d4 10.a4 10.d3 10.a3
1930s 1 100% — — —
1940s 6 50% 50% — —
1950s 33 42% 33% 24% —
1960s 21 57% 29% 14% —
1970s 7 86% 14% — —
1980s 24 38% 33% 29% —
1990s 79 39% 34% 20% 5%
2000s 127 44% 31% 21% 3%
2010s 155 57% 30% 8% 5%
2020s 43 65% 26% 7% 2%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
10.d4 57% 65% ▲ +8.3%
10.a4 30% 26% ▼ -4.7%
10.d3 8% 7% ▼ -0.8%
10.a3 5% 2% ▼ -2.2%
Joueurs célèbres
Champions du monde dans cette position
Carlsen, Magnus — 1 partie
Parties historiques
10.d4 — 50.0% (248 parties)
1935 — Bellod Thomas, Gonzalo vs Stoltz, Gabriel — 1-0 — Warsaw POL
1948 — Averbakh, Yuri L vs Bondarevsky, Igor — 1/2-1/2 — Moscow RUS
1949 — Foltys, Jan vs Bolbochan, J. — 1/2-1/2 — Trencianske Teplice SVK
1949 — Schmid, Leo vs Rossolimo, Nicolas — 0-1 — Heidelberg
1952 — Oddy, W. vs Fuller, Jack — 0-1 — England
10.a4 — 30.8% (153 parties)
1948 — Konstantinopolsky, Alexander vs Bondarevsky, Igor — 1/2-1/2 — Moskou ch-URS
1949 — Najdorf, M. vs NN — 1-0 — Buenos Aires ARG
1949 — Daniel, Roger vs Hugot, Claude — 1/2-1/2 — Besancon FRA
1950 — Penrose, Oliver vs Barden, Leonard — 1-0 — West London CC
1950 — Abadia Castillo, Mateo vs Bolbochan, J. — 1/2-1/2 — Mar del Plata ARG
10.d3 — 15.3% (76 parties)
1954 — Vasiukov, Evgeni vs Suetin, Alexey S — 1-0 — Riga LAT
1955 — Djurasevic, Bozidar vs Trajkovic, Mihajlo — 1/2-1/2 — Novi Sad SRB
1956 — Borsony, Valt vs Kaliwoda, Kurt — 1-0 — ICCF
1956 — Siaperas, Triantafyllos vs Benkner, Otto — 1/2-1/2 — Moskou olm
1958 — Van Perlo, Gerardus C vs Perfors, Barthold — 0-1 — NLD-KNSB
10.a3 — 3.2% (16 parties)
1990 — ? vs Tyni, Jukka-Pekka — 1/2-1/2 — FIN-ch Helsinki FIN
1994 — Kwiatkowski, Feliks J vs Lane, Gary W — 0-1 — Londen open
1998 — Justin, Matjaz vs Lazovic, Gordan — 1/2-1/2 — Sk.Loka SLO/chTz1
1998 — Giaccio, Alfredo vs Slipak, Sergio — 1/2-1/2 — Villa Gesell;Clarin GP fnl
2000 — De Firmian, Nick vs Hansen, Lars Bo — 1/2-1/2 — Esbjerg DEN