B91j - 7…b5 - Najdorf (1948)

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B91j — Najdorf (1948)
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.g3 e5 7.Nde2 b5
Les coups candidats
8.Bg2 — 73.3% (400 parties)
Ambassadeurs : Kaushansky, Leonid (4x), Papp, Sarah (4x), Svidler, Peter (4x), Michielsen, Joost (3x), Astaneh Lopez, Alex (3x), Littlewood, Norman (2x), De Fotis, Gregory (2x), Markus, John Raymond (2x)
8.Bg5 — 10.8% (59 parties)
Ambassadeurs : Ivanov, Alexander (10x), Kholmov, Ratmir D (3x), Aleksic, Nenad (3x), De Firmian, Nick (2x), Popovic, Petar (2x), Fuderer, Andrija (1x), Pilnik, Herman (1x), Klovans, Janis (1x)
8.Nd5 — 9.7% (53 parties)
Ambassadeurs : Noshin, Anjum (2x), Rahman, Syed Mahfuzur (2x), Kagan, Shimon (1x), Borik, Otto (1x), Mihevc-Mohr, Narcisa (1x), Svent, Suzana (1x), Seifert, Josef Maria (1x), Goeldi, Hans (1x)
8.a4 — 3.1% (17 parties)
Ambassadeurs : Mega R (2x), ? (2x), Kholmov, Ratmir D (1x), Kuczynski, Robert (1x), Perevertkin, Vladimir (1x), MAALOUM SAID (1x), Guyot, Philippe (1x), Boudre, Jean-Pierre (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 8.Bg2 8.Bg5 8.Nd5 8.a4
<1800 20 40% 15% 25% 10%
1800-2200 182 80% 8% 5% 2%
2200-2600 283 71% 12% 13% 2%
2600+ 9 67% 22% 11% —
Évolution par décennie (% des parties)
Décennie N parties 8.Bg2 8.Bg5 8.Nd5 8.a4
1950s 16 88% 12% — —
1960s 8 75% 25% — —
1970s 6 50% 33% — 17%
1980s 49 67% 12% 2% 18%
1990s 94 83% 15% — 1%
2000s 168 81% 10% 3% 1%
2010s 173 65% 9% 21% 2%
2020s 32 53% 3% 34% 3%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
8.Bg2 65% 53% ▼ -12.2%
8.Bg5 9% 3% ▼ -6.1%
8.Nd5 21% 34% ▲ +13.6%
8.a4 2% 3% ▲ +1.4%
Parties historiques
8.Bg2 — 73.3% (400 parties)
1950 — Ullrich, Bruno vs Mueller, Claus — 0-1 — Soemmerda GER
1950 — Popov, Petar vs Ujtelky, Maximilián Samuel Rudolf — 0-1 — CSR-BUL Prague CZE
1951 — Shocron, Alon vs Casas Perea, Fernando — 1-0 — Buenos Aires ch AR
1954 — Cortlever, Nico vs Milev, Zdravko — 1/2-1/2 — Amsterdam NED
1954 — Gross, Hannes vs Evans, Larry — 0-1 — Hollywood
8.Bg5 — 10.8% (59 parties)
1950 — Fuderer, Andrija vs Pilnik, Herman — 1/2-1/2 — Bled SLO
1955 — Klovans, Janis vs Zurakhov, Vladlen Y — 1-0 — Voroshilovgrad
1968 — Nikolic, Sanja vs Flesch, Jean-benoit — 1/2-1/2 — Wijk aan Zee II
1968 — Kinnmark, Ove vs Brostrom, Goran — 1-0 — Norrkoeping
1978 — Kholmov, Ratmir D vs Zilberstein, Valery I — 1/2-1/2 — Daugavpils LAT
8.Nd5 — 9.7% (53 parties)
1982 — Kagan, Shimon vs Borik, Otto — 1/2-1/2 — Randers zt f
2002 — Mihevc-Mohr, Narcisa vs Svent, Suzana — 0-1 — Dobrna SLO
2002 — Vuckovic, Aleksandar vs Pruefer, Stefan — 1/2-1/2 — Bayern
2003 — Seifert, Josef Maria vs Goeldi, Hans — 1-0 — Vaduz
2008 — Zwanzger, Johannes, Dr. vs Mai, Philipp, Dr. — 1/2-1/2 — Bayern
8.a4 — 3.1% (17 parties)
1976 — Ligterink, Gert vs Stean, Michael F — 1/2-1/2 — Haifa ISR
1984 — Peters, Alexander John vs Tarjan, James — 0-1 — Berkeley ch-USA
1985 — Guyot, Philippe vs Boudre, Jean-Pierre — 0-1 — Clermont-Ferrand FRA
1985 — Santo-Roman, Marc vs Darcyl, Tomas — 0-1 — Mendoza ARG
1986 — Perevertkin, Vladimir vs MAALOUM SAID — 1-0 — Shitomir