B91j — Sicilian: Najdorf, 6.g3 e5 7.Nde2 b5

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.g3 e5 7.Nde2 b5 * ○ Trait aux Blancs

Ouverture — Centre fermé

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plans. Bg2 (Fianchetto, fou sur la grande diagonale — 73 % des parties) ; Bg5 (Fou actif (mobilité 7), Développer c1 — 11 % des parties) ; Nd5 (Cavalier centralisé en d5 — 10 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plans. ...Bb7 (Développer c8 — 63 % des parties) ; ...Nbd7 (Développer b8 — 28 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	● d6
Chaînes	● f2→g3, h2→g3	● a6→b5, d6→e5
Passés	—	—
Majorité	● aile dame 3v2	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● d5 (3v1)	● g4 (2v0)
Cases faibles	—	—
Centre	● d4 (2v1), ● d5 (3v1)	● e5 (1v0)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● d	● c

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bf1	● Bf1 Non développé (mob. 2)
Bc8		● Bc8 Non développé (mob. 6)
Bf8		● Bf8 Non développé (mob. 1)
Paire de fous	● Oui	● Oui
Non développées	4 (● c1, ● f1, ● a1, ● h1)	5 (● b8, ● c8, ● f8, ● a8, ● h8)

Sécurité du roi

	♔ Blancs	♚ Noirs
Statut	● Au centre	● Au centre
Droits de roque	O-O / O-O-O	O-O / O-O-O

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	fermé
Ruptures	● f2-f4	● …d6-d5

Partie
1948 GER Ch Essen GER – Round 6 – Kieninger, Georg – 1-0 – Niephaus, Walter – G11 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 e5 7. Nde2 b5 8. Bg5 Bb7 9. Bxf6 Qxf6 10. Bg2 Nd7
1950 Bled – Round 6 – Fuderer, Andrija – 1/2-1/2 – Pilnik, Herman – G35 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 e5 7. Nde2 b5 8. Bg5 Be7 9. Bxf6 Bxf6 10. Nd5 Bb7
1950 CSR-BUL Prague CZE – Round 2 – Popov, Petar – 0-1 – Ujtelky, Maximilian – G9 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 e5 7. Nde2 b5 8. Bg2 Bb7 9. O-O Nbd7 10. Nd5 Nxd5
1954 Hastings5455 – Round 6 – Alexander Ronald Cheng – 1/2-1/2 – Szabo, Ladislav – G22 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 e5 7. Nde2 b5 8. Bg2 Bb7 9. a3 Nbd7 10. O-O Be7
1954 Hollywood Open – Round ? – Gross, Hans-Joachim – 0-1 – Evans, Larry M – G20 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 e5 7. Nde2 b5 8. Bg2 Bb7 9. O-O Nbd7 10. f3 Be7
1954 Olympiad final A – Round 1 – Cortlever, Nico – 1/2-1/2 – Milev, Zdravko – G60 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 e5 7. Nde2 b5 8. Bg2 Bb7 9. O-O Be7 10. a4 b4
1955 Gothenburg Interzonal – Round 6 – Donner, Jan-Hein – 1/2-1/2 – Pachman, Ludek – G59 1. Nf3 c5 2. e4 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 e5 7. Nde2 b5 8. Bg2 Bb7 9. h3 Be7 10. O-O Nbd7
1955 URS Team Ch fin – Round 2 – Klovans, Janis – 1-0 – Zurakhov, Vladlen Y – G4 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 e5 7. Nde2 b5 8. Bg5 Nbd7 9. Bh3 Nb6 10. Bxc8 Rxc8
1957 HUN Ch 12th – Round ? – Honfi, Karoly – 0-1 – Szilagyi, Gyorgy Laszlo – G16 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 e5 7. Nde2 b5 8. Bg2 Bb7 9. O-O Nbd7 10. h3 Be7
1959 Buenos Aires JM – Round 7 – Bolbochan, J. – 1-0 – Bielicki, Carlos – G32 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 e5 7. Nde2 b5 8. Bg2 Bb7 9. O-O Be7 10. Re1 O-O
1965 Hastings ch-BCF – Round 9 – Hartston, William R – 1/2-1/2 – Littlewood, Norman – G95 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 e5 7. Nde2 b5 8. Bg2 Bb7 9. O-O Nbd7 10. Nd5 Nxd5
1965 Hastings6566 – Round 2 – Vasiukov, Evgeni – 1-0 – Littlewood, Norman – G7 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 e5 7. Nde2 b5 8. Bg2 Bb7 9. O-O Nbd7 10. h3 Rc8
1966 It II Beverwijk NED – Round 2 – Kramer, Haije – 1/2-1/2 – Gereben, Erno – G4 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 e5 7. Nde2 b5 8. Bg2 Bb7 9. a4 b4 10. Nd5 Nxd5
1968 SWE Ch – Round 14 – Kinnmark, Ove – 1-0 – Brostrom, Goran – G62 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 e5 7. Nde2 b5 8. Bg5 Nbd7 9. a4 Bb7 10. Bg2 Be7
1968 Wijk aan Zee II – Round 1 – Dan Nikolic, Slobodan – 1/2-1/2 – Flesch, Jean-benoit – G21 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 e5 7. Nde2 b5 8. Bg5 Bb7 9. Bxf6 Qxf6 10. Bg2 Qd8
EU Team Ch (Men) 17th 2009 – Round 7 – Fressinet, Laurent – 1/2-1/2 – Wojtaszek, Radoslaw – G27 1. e4 c5 2. Nc3 d6 3. Nge2 Nf6 4. d4 cxd4 5. Nxd4 a6 6. g3 e5 7. Nde2 b5 8. Bg2 Bb7 9. O-O Nbd7 10. a4 b4
Investbanka 1997 – Round 6 – Georgiev, Kaloyan – 1/2-1/2 – Lautier, Joel – G16 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 e5 7. Nde2 b5 8. Bg2 Bb7 9. a3 Nbd7 10. h3 Nc5
TCh-RUS 2008 – Round 2 – Alekseev, Evgeny – 1/2-1/2 – Karjakin, Sergey – G51 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 e5 7. Nde2 b5 8. Nd5 Nbd7 9. Nec3 Bb7 10. Bg2 Nxd5

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

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