B91b — Sicilian: Najdorf, 6.g3 b5

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

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

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Plans. Bg2 (Fianchetto, fou sur la grande diagonale — 90 % des parties) ; a3 (Préparer expansion aile dame — 9 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

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Plans. ...Bb7 (Développer c8 — 93 % des parties) ; ...e5 (Occuper le centre — 6 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→g3, h2→g3	● a6→b5, e7→d6
Passés	—	—
Majorité	● aile dame 3v2	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● f4 (2v0), ● d5 (2v1), ● f5 (2v1)	● g4 (2v1)
Cases faibles	—	—
Centre	● d4 (1v0), ● d5 (2v1)	● 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. 6)
Bc8		● Bc8 Non développé (mob. 6)
Bf8		● Bf8 Non développé (mob. 0)
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	mobile
Ruptures	● e4-e5	● …d6-d5

Partie
1941 Munchen – Round 1 – Kieninger, Georg – 1-0 – Mross, Paul – G11 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 b5 7. Bg2 Bb7 8. O-O Nbd7 9. Re1 e6 10. e5 Bxg2
1946 Moscow Ch – Round ? – Panov, Vasily – 1/2-1/2 – Kotov, Alexander A – G48 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 b5 7. Bg2 Bb7 8. O-O e6 9. a3 Qc7 10. f4 Nc6
1948 New York – Round 7 – Fine, Richard Alvaro Adrien – 1-0 – Najdorf, Miguel – G37 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 b5 7. Bg2 Bb7 8. O-O e6 9. Qe2 Nbd7 10. a3 Qc7
1948 New York – Round 8 – Horowitz, Albert Israel – 1-0 – Denker, Arnold S – G43 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 b5 7. Bg2 Bb7 8. a4 b4 9. Nd5 Nbd7 10. O-O e6
1949 Oldenburg – Round 5 – Enevoldsen, Jens – 1-0 – Walther, Edgar – G16 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 b5 7. Bg2 Bb7 8. O-O e6 9. a3 Nbd7 10. Re1 Qc7
1949 URS Ch, semi final – Round 1 – Bonch-Osmolovsky, Mikhail – 0-1 – Beilin, Mikhail – G55 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 b5 7. Bg2 Bb7 8. O-O e6 9. a3 Qc7 10. Nde2 Be7
1950 Venice – Round 12 – Czerniak, Magdalena – 0-1 – Kotov Lundqvist, Alex – G99 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 b5 7. Bg2 Bb7 8. O-O e6 9. a3 Qc7 10. f4 Be7
1952 Liberation – Round 2 – Matanovic, Aleksandar – 1-0 – Andric, Dragoslav – G22 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 b5 7. Bg2 Bb7 8. a4 e5 9. Nde2 b4 10. Nd5 Nxd5
1952 Mar del Plata – Round 12 – Puiggros, Guillermo – 1/2-1/2 – Reinhardt, Enrique – G87 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 b5 7. a3 Bb7 8. Bg2 e6 9. O-O Qc7 10. Be3 Be7
1953 Zagreb – Round 13 – Rabar, Braslav – 1-0 – Dimc, D. – G105 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 b5 7. Bg2 e5 8. Nb3 Bb7 9. O-O Be7 10. Bd2 Nbd7
1954 FRG Ch qual West – Round 9 – Brandenberg, Karl Heinz – 1-0 – Werner, Stephan – G16 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 b5 7. Bg2 Bb7 8. a4 bxa4 9. f3 Nbd7 10. Nxa4 d5
1958 Yugoslavia – Round 2 – Fuderer, Andrija – 1-0 – Kotov Lundqvist, Alex – G9 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 b5 7. Bg2 Bb7 8. a4 e5 9. Nb3 b4 10. Nd5 Bxd5
1962 Poznan ch POL – Round 8 – Filipowicz, Andrzej – 1/2-1/2 – Drozd, Ryszard – G47 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 b5 7. Bg2 Bb7 8. O-O e6 9. Qe2 Nbd7 10. Rd1 Qc7
1966 La Habana olm fin-A – Round 1 – Enevoldsen, Jens – 0-1 – Evans, Larry M – G12 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 b5 7. Bg2 Bb7 8. O-O e6 9. a3 Qc7 10. g4 h6
1966 Palma de Mallorca – Round 6 – Robatsch, Karl – 1/2-1/2 – Visier Segovia, Fernando – G38 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 b5 7. Bg2 Bb7 8. a4 bxa4 9. O-O e6 10. Rxa4 Nfd7

B91b — Najdorf (1941)

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.g3 b5

Les coups candidats

7.Bg2 — 90.5% (268 parties)

Ambassadeurs : Matanovic, Aleksandar (2x), Kotov, Alexander (2x), Enevoldsen, Jens (2x), Evans, Larry (2x), Czerniak, Moshe (2x), Fernandez, Antonio (2x), Shkuran, Danylo (2x), Trabert, Bettina (2x)

7.a3 — 8.8% (26 parties)

Ambassadeurs : Puiggros, Guillermo (1x), Reinhardt, Enrique (1x), Sanz Montarelo, Teodoro (1x), Carpintero, Javier (1x), Conceicao, Joanita Siri da Costa (1x), Alves, Andre Garcia (1x), Bloom, Patrick R (1x), Walsh, Jonathan R (1x)

7.a4 — 0.7% (2 parties)

Ambassadeurs : Groenroos, Pentti (1x), Bak, Jerzy (1x), Sideris, Theodoros (1x), Tsiros, Fragkiskos Vlasios (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	7.Bg2	7.a3	7.a4
<1800	20	60%	40%	—
1800-2200	156	93%	6%	1%
2200-2600	71	100%	—	—

Évolution par décennie (% des parties)

Décennie	N parties	7.Bg2	7.a3	7.a4
1950s	13	92%	8%	—
1960s	7	100%	—	—
1970s	8	100%	—	—
1980s	14	86%	7%	7%
1990s	37	92%	8%	—
2000s	93	94%	6%	—
2010s	108	87%	12%	1%
2020s	16	88%	12%	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
7.Bg2	87%	88%	+0.5%
7.a3	12%	12%	+0.5%
7.a4	1%	0%	▼ -0.9%

Parties historiques

7.Bg2 — 90.5% (268 parties)

1950 — Czerniak, Moshe vs Kotov, Alexander — 0-1 — Venice ITA
1950 — Fine, Reuben vs Denker, Arnold S — 1-0 — New York Manhattan
1952 — Matanovic, Aleksandar vs Stoltz, Gösta — 1-0 — Belgrade SRB
1952 — Matanovic, Aleksandar vs Abdi, Andreas — 1-0 — Belgrade SRB
1953 — Dubinin, Peter vs Suetin, Alexey S — 1-0 — Soviet Union

7.a3 — 8.8% (26 parties)

1952 — Puiggros, Guillermo vs Reinhardt, Enrique — 1/2-1/2 — Mar del Plata ARG
1988 — Sanz Montarelo, Teodoro vs Carpintero, Javier — 1-0 — Valladolid
1994 — Perdomo Abad, Jose vs Angel Acosta, Juan Carlos — 1/2-1/2 — Las Palmas ESP
1995 — Conceicao, Joanita Siri da Costa vs Alves, Andre Garcia — 0-1 — Evora
1999 — Bloom, Patrick R vs Walsh, Jonathan R — 1-0 — USA

7.a4 — 0.7% (2 parties)

1986 — Groenroos, Pentti vs Bak, Jerzy — 1-0 — corr Baltic tt
2011 — Sideris, Theodoros vs Tsiros, Fragkiskos Vlasios — 1-0 — ?