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A39f — Symmetrical, Main Line 7.d4 (1928)
1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.d4 cxd4 8.Nxd4 a6
Les coups candidats
9.c5 — 21.4% (429 parties)
Ambassadeurs : Adamski, Jan (4x), Velasquez, Manuel A (3x), Kertesz, Alfred (2x), Holloway, Nigel J (2x), Khadempour, Farhad (2x), Szekely, Panna Szandra (2x), Frois, Antonio (2x), Conceicao, Paulo (2x)
9.Nc2 — 18.0% (361 parties)
Ambassadeurs : Balcerowski, Witold (3x), Loginov, Valery A (3x), Adamski, Jan (2x), Stahlberg, Gideon (2x), Perez Nivar, Marco Tulio (2x), Konopleva, Natalia (2x), Vasiljev, Jurij (2x), Gromek, Jozef (1x)
9.h3 — 12.0% (240 parties)
Ambassadeurs : Christiansen, Johan-Sebastian (2x), Seitz, Jakob Adolf (1x), Piccinini, Giorgio (1x), Barda, Olaf (1x), Lilliestrom, Malte (1x), Sigurjonsson, Johann O (1x), Angantysson, Haukur (1x), Larsen, Bent Ravn (1x)
9.e3 — 10.1% (203 parties)
Ambassadeurs : Richter, Samuel Dion (2x), Boey, Josef (1x), Decleir, Walter (1x), Aditya Balu Jadhav (1x), Golombek, Harry (1x), Sakharov, Yuri N (1x), Popov, Luben (1x), Naranja, Renato (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 9.c5 9.Nc2 9.h3 9.e3
<1800 145 8% 13% 12% 12%
1800-2200 1198 21% 18% 13% 10%
2200-2600 373 37% 17% 10% 9%
2600+ 1 — — 100% —
Évolution par décennie (% des parties)
Décennie N parties 9.c5 9.Nc2 9.h3 9.e3
1950s 14 7% — 36% 14%
1960s 22 — 45% 14% 9%
1970s 46 20% 41% 13% 7%
1980s 84 10% 25% 8% 8%
1990s 330 19% 22% 12% 12%
2000s 536 19% 16% 13% 10%
2010s 776 23% 15% 12% 10%
2020s 193 34% 18% 7% 8%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
9.c5 23% 34% ▲ +10.9%
9.Nc2 15% 18% ▲ +2.9%
9.h3 12% 7% ▼ -5.2%
9.e3 10% 8% ▼ -2.0%
Parties historiques
9.c5 — 21.4% (429 parties)
1958 — Shaposhnikov, Yury vs G.k.p., Rubel — 1-0 — Tashkent UZB
1971 — Holloway, Nigel J vs Cooper, Andrew C — 1-0 — Trinity-Trinity Hall
1972 — Flatow, Alfred vs Al Jassani Abdulrazaq — 1-0 — Skopje MKD
1972 — Holloway, Nigel J vs Patterson, MG. — 1-0 — Barnstaple
1974 — Sharipov, Munir vs Harestad, Thor Geir — 1/2-1/2 — Teesside ENG
9.Nc2 — 18.0% (361 parties)
1960 — Stahlberg, Gideon vs Enevoldsen, Jens — 1-0 — Copenhagen DEN
1960 — Stahlberg, Gideon vs Pietzsch, Wolfgang — 1-0 — Copenhagen DEN
1962 — Gromek, Jozef vs Gabrys, Zygmunt — 1-0 — Poznan POL
1963 — Doda, Zbigniew vs Balcerowski, Witold — 1/2-1/2 — Polanica Zdroj POL
1965 — Kestler, Hans Guenter vs Degenhardt, Norbert — 1/2-1/2 — Bad Aibling GER
9.h3 — 12.0% (240 parties)
1955 — Feuerstein, Arthur vs Rodriguez Garcia, Benedicto — 1-0 — New York, NY USA
1957 — Larsen, Bent Ravn vs Munoz Tamayo, Cesar Froilan — 0-1 — Reykjavik ISL
1957 — Schmid, Lothar vs Castaldi, Vincenzo — 1-0 — Bern Bern SUI
1958 — Barda, Olaf vs Lilliestrom, Malte — 1-0 — Jonkoping
1959 — Seitz, Jakob Adolf vs Piccinini, Giorgio — 0-1 — Reggio Emilia ITA
9.e3 — 10.1% (203 parties)
1955 — Aditya Balu Jadhav vs Golombek, Harry — 1-0 — Mont Pelerin sur Vevey
1957 — Boey, Josef vs Decleir, Walter — 1-0 — Antwerp BEL
1964 — Sakharov, Yuri N vs Popov, Luben — 1/2-1/2 — Kiev UKR
1967 — Naranja, Renato vs Bandal, Rosendo Jr — 1-0 — Manila PHI
1971 — Quinteros, Miguel A. vs Juarez, Carlos Eleodoro — 1/2-1/2 — Mar del Plata ARG