A26g - 6…a5 - Closed (1957)

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A26g — Closed (1957)
1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.Rb1 a5
Les coups candidats
7.a3 — 70.3% (478 parties)
Ambassadeurs : Snape, Ian L (6x), Foisor, Ovidiu-Doru (4x), Reizniece, Dana (4x), Gallagher, Joseph G. (4x), Sunye Neto, Jaime (4x), Andersson, Ulf (3x), Van Hoolandt, Patrick (3x), Deodhar, Vrushali Umesh (3x)
7.e3 — 17.4% (118 parties)
Ambassadeurs : Giardelli, Sergio C. (3x), Gagunashvili, Merab (3x), Piket, Jeroen (2x), Jussupow, Artur (2x), Foisor, Cristina-Adela (2x), Zilber, Israel (1x), Mnatsakanian, Eduard A (1x), Anay Barche (1x)
7.Nf3 — 7.1% (48 parties)
Ambassadeurs : Plante, Jacques (1x), Mazzoni, Guy (1x), Dobrzynski, Wojciech (1x), Gromek, Jozef (1x), Stekel Grunberg, Moises (1x), Trois, Francisco R.T. (1x), Vassiljev Igor (1x), Piarnpuu, Leili (1x)
7.e4 — 2.5% (17 parties)
Ambassadeurs : Kobalia, Mikhail (2x), O'Kelly, Albéric de Galway (1x), Medina-Garcia, Antonio (1x), Zaichik, Gennadi (1x), Sturua, Zurab (1x), Makarichev, Sergey (1x), Milos, Gilberto (1x), Slipak, Sergio (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 7.a3 7.e3 7.Nf3 7.e4
<1800 16 81% 12% 6% —
1800-2200 188 76% 11% 7% 2%
2200-2600 400 70% 20% 5% 3%
2600+ 21 43% 33% 14% 10%
Évolution par décennie (% des parties)
Décennie N parties 7.a3 7.e3 7.Nf3 7.e4
1950s 1 — 100% — —
1960s 13 69% 8% 8% 8%
1970s 26 81% 8% 8% —
1980s 45 67% 24% — 2%
1990s 165 69% 16% 7% 4%
2000s 220 73% 18% 5% 3%
2010s 151 70% 16% 11% 1%
2020s 59 66% 24% 8% —
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
7.a3 70% 66% ▼ -3.4%
7.e3 16% 24% ▲ +7.8%
7.Nf3 11% 8% ▼ -2.1%
7.e4 1% 0% ▼ -1.3%
Joueurs célèbres
Champions du monde dans cette position
Karpov, Anatoly — 3 parties
Botvinnik, Mikhail — 1 partie
Parties historiques
7.a3 — 70.3% (478 parties)
1961 — Botvinnik, Mikhail vs Gligoric, Sofija — 1/2-1/2 — Oberhausen etc
1961 — Milic, Borislav vs Gligorić, Svetozar — 1/2-1/2 — Belgrade SRB
1962 — Miguel, Nahuel vs Milev, Zdravko — 1-0 — Havana CUB
1963 — Khanov, Kurban vs Khalilbeili, Sultan — 1-0 — URS-chT Moscow RUS
1965 — Sakharov, Yuri N vs Kuzmin, Gennadi — 1-0 — Tallinn ch-URS
7.e3 — 17.4% (118 parties)
1957 — Zilber, Israel vs Mnatsakanian, Eduard A — 1/2-1/2 — Leningrad RUS
1966 — Anay Barche vs Polugaevsky, Lev — 0-1 — Sochi RUS
1971 — Masic, Ljubomir vs Zinn, Lothar — 1-0 — Baja
1975 — Sanz Alonso, Francisco Javier vs San Sebastian Vicioso, Carlos — 1-0 — Benidorm
1980 — Speelman, Jon S vs Jussupow, Artur — 1/2-1/2 — Mexico City MEX
7.Nf3 — 7.1% (48 parties)
1969 — Plante, Jacques vs Mazzoni, Guy — 1/2-1/2 — Pau
1975 — Stekel Grunberg, Moises vs Trois, Francisco R.T. — 1/2-1/2 — Fortaleza BRA
1976 — Dobrzynski, Wojciech vs Gromek, Jozef — 0-1 — Vitrobud op Sandomierz
1990 — Schuldt, Volker vs Stanke, Juergen — 1/2-1/2 — Hamburg Schachfreunde
1991 — Pribyl, Josef vs Votava, Jan — 1-0 — Brno CZE
7.e4 — 2.5% (17 parties)
1966 — O'Kelly, Albéric de Galway vs Medina-Garcia, Antonio — 1-0 — Palma de Majorca ESP
1980 — Zaichik, Gennadi vs Sturua, Zurab — 0-1 — Tbilisi GEO
1990 — Bezold, Michael vs Berndt, Stephan — 1-0 — Neukoelln Berlin GER
1996 — Makarichev, Sergey vs Kobalia, Mikhail — 0-1 — Moscow RUS
1996 — Markowski, Tomasz vs Brito Garcia, Alfredo — 1/2-1/2 — Zaragoza