B25f — Sicilian: Closed, 6.f4 Rb8

1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.f4 Rb8 * ○ Trait aux Blancs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

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Plans. Nf3 (Développer g1 — 76 % des parties) ; a4 (9 % des parties) ; Be3 (Fou actif (mobilité 5), Développer c1 — 6 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

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Plans. ...b5 (Expansion aile dame — 48 % des parties) ; ...e6 (Solidifier le centre, libérer le fou — 18 % des parties) ; ...Nf6 (Développer g8 — 8 % des parties) ; ...Bg4 (Fou actif (mobilité 9), Développer c8 — 7 % des parties) ; ...Nd4 (Cavalier centralisé en d4 — 5 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● c2→d3, h2→g3, d3→e4, g3→f4	● d6→c5, e7→d6, f7→g6, h7→g6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● d5 (2v0)	● b4 (2v0), ● d4 (3v0)
Cases faibles	—	—
Centre	● d5 (2v0), ● e4 (3v0)	● d4 (3v0), ● e5 (3v1)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 2)
Bg2	● Bg2 Ok (mob. 3)
Bg7		● Bg7 Actif (mob. 6)
Bc8		● Bc8 Non développé (mob. 5)
Paire de fous	● Oui	● Oui
Non développées	4 (● g1, ● c1, ● a1, ● h1)	3 (● g8, ● c8, ● h8)

Sécurité du roi

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

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	mobile
Ruptures	● d3-d4, ● e4-e5, ● f4-f5	● …c5-c4, ● …d6-d5, ● …e7-e5, ● …f7-f5

Partie
1949 Schlechter Memorial – Round 1 – Kaliwoda, Kurt – 1/2-1/2 – Cs. Kovacs, Laszlo – G28 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 Rb8 6. f4 d6 7. Nf3 b5 8. O-O Nd4 9. Ne2 Nxf3+ 10. Bxf3 Bh3
1949 Schlechter Memorial – Round 1 – Kaliwoda, Kurt – 1/2-1/2 – Foltys, Jan – G29 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4 Rb8 7. Nf3 Nd4 8. O-O Bg4 9. Ne2 e6 10. c3 Bxf3
1953 Candidats Tournament – Round 12 – Bronstein, David I – 1-0 – Keres, Paul Petrovich – G77 1. e4 c5 2. Nc3 g6 3. g3 Bg7 4. d3 Nc6 5. Bg2 Rb8 6. f4 d6 7. Nf3 e6 8. O-O Nge7 9. e5 dxe5 10. fxe5 Nxe5
1953 Opatija – Round 1 – Nikolac, Juraj – 0-1 – Fuderer, Andrija – G11 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 Rb8 6. f4 d6 7. Nf3 b5 8. O-O b4 9. Ne2 Nf6 10. h3 O-O
1955 CSR Ch – Round 16 – Ivanco, Imrich – 1/2-1/2 – Dolezal, Jiri – G125 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4 Rb8 7. Be3 b5 8. Qd2 b4 9. Nd1 e6 10. Nf3 Qb6
1958 Argentina – Round 1 – Emma, Jaime – 0-1 – Garcia Vera, Romeo – G1 1. Nc3 c5 2. e4 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 Rb8 6. f4 d6 7. Nf3 Bd7 8. O-O Qc8 9. Nd5 Nf6 10. Ne3 Ng4
1960 Budapest zt – Round 3 – Ahman Ernst – 0-1 – Bertok, Mario Jr. – G21 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 Rb8 6. f4 d6 7. Nf3 Nf6 8. O-O O-O 9. Ne2 b5 10. c3 b4
1962 Stockholm Interzonal – Round 20 – Benko, Pal – 1-0 – Aaron, Manuel – G181 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 Rb8 6. f4 d6 7. h3 Nf6 8. Nf3 O-O 9. O-O b5 10. g4 b4
1966 Reggio Emilia ITA – Round 2 – Capece, Adolivio – 0-1 – Kozma, Julius – G4 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4 Rb8 7. Nce2 Nf6 8. c3 O-O 9. Nf3 b5 10. O-O b4
1968 Lugano ol (Men) fin-C – Round 1 – Sacarello Felix – 1-0 – Magrin, Antonio – G5 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4 Rb8 7. Nf3 b5 8. O-O Bd7 9. f5 Qc8 10. Ng5 Nh6
1968 Malaga ESP – Round 4 – Medina-Garcia, Antonio – 0-1 – Kaplan, Julio – G6 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4 Rb8 7. Nf3 Nf6 8. O-O O-O 9. Nh4 Nd4 10. f5 b5
1969 Buenos Aires – Round 3 – Debarnot, Roberto – 1-0 – Pelikán, Jiří – G23 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 Rb8 6. f4 d6 7. Nf3 b5 8. Rb1 b4 9. Nd5 e6 10. Ne3 Nge7

B25f — Closed (1949)

1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.f4 Rb8

Les coups candidats

7.Nf3 — 76.4% (685 parties)

Ambassadeurs : Donev, Ivo (10x), Valet, Richard (10x), Roos, Jean-Luc (4x), Keskowski, Thilo (4x), Dvoirys, Semen I. (4x), Domont, Alexandre (3x), Habibi, Ali (3x), Turner, Matthew J (3x)

7.a4 — 8.7% (78 parties)

Ambassadeurs : Krallmann, Matthias (2x), Ieong, Seak Hin (2x), Wilshusen, Horst (2x), Haagen Hansen, Jens (1x), Aaltio, Erkki (1x), Zichichi, Alvise (1x), Forintos, Gyozo V (1x), Aspstrom, Yngve (1x)

7.Be3 — 6.2% (56 parties)

Ambassadeurs : Andersen, Borge (1x), Larsen, Bent Ravn (1x), Ivan, Imrich (1x), Dolezal, Jiri (1x), Laven, Ralf, Dr. (1x), Sehner, Norbert (1x), Zahn, Nicol (1x), Dragasevic, Antonina (1x)

7.Nh3 — 3.1% (28 parties)

Ambassadeurs : Rosen, Willy (1x), Muender, Michael (1x), Day, Lawrence A. (1x), Fiedler, Brian (1x), Harari, Zaki (1x), Lobo Nelson (1x), Travnicek, Petr (1x), Hardicsay, Peter (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	7.Nf3	7.a4	7.Be3	7.Nh3
<1800	42	81%	7%	5%	2%
1800-2200	387	74%	10%	8%	1%
2200-2600	357	78%	7%	5%	5%
2600+	3	100%	—	—	—

Évolution par décennie (% des parties)

Décennie	N parties	7.Nf3	7.a4	7.Be3	7.Nh3
1950s	4	75%	—	25%	—
1960s	14	57%	14%	7%	—
1970s	35	66%	11%	3%	17%
1980s	56	80%	5%	4%	7%
1990s	234	79%	6%	7%	4%
2000s	295	82%	8%	5%	1%
2010s	198	73%	10%	9%	2%
2020s	61	59%	23%	3%	2%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
7.Nf3	73%	59%	▼ -14.2%
7.a4	10%	23%	▲ +13.4%
7.Be3	9%	3%	▼ -5.8%
7.Nh3	2%	2%	+0.1%

Parties historiques

7.Nf3 — 76.4% (685 parties)

1953 — Bronstein, David I vs Keres, Paul Petrovich — 1-0 — Zurich SUI
1953 — Nikolac, Juraj vs Fuderer, Andrija — 0-1 — Opatija
1958 — Emma, Jaime vs Garcia Vera, Romeo — 0-1 — Buenos Aires ARG
1960 — Fuller, Ronald A vs Beaty, John Harold — 1-0 — Leicester
1960 — Ahman, Ernst vs Bertok, Mario Jr. — 0-1 — Budapest HUN

7.a4 — 8.7% (78 parties)

1961 — Haagen Hansen, Jens vs Aaltio, Erkki — 1/2-1/2 — Helsinki FIN
1963 — Zichichi, Alvise vs Forintos, Gyozo V — 0-1 — Torneo di Capodanno
1973 — Aspstrom, Yngve vs From, Sigfred — 1-0 — Randers DEN
1975 — Porter, Patrick vs De Coverly, Roger D — 0-1 — Staffs
1975 — Blatny, Frantisek vs Taimanov, Mark — 0-1 — Decin CZE

7.Be3 — 6.2% (56 parties)

1955 — Ivan, Imrich vs Dolezal, Jiri — 1/2-1/2 — Prague CZE
1960 — Andersen, Borge vs Larsen, Bent Ravn — 1-0 — Copenhagen DEN
1971 — Koumantarakis, P.. vs Skalkotas, Nikolaos — 0-1 — ?
1982 — Laven, Ralf, Dr. vs Sehner, Norbert — 1-0 — Aachen GER
1989 — Zahn, Nicol vs Dragasevic, Antonina — 0-1 — Dortmund GER

7.Nh3 — 3.1% (28 parties)

1974 — Rosen, Willy vs Muender, Michael — 0-1 — Menden
1975 — Ozsvath, Andras vs Karasev, Vladimir — 1-0 — Moscow RUS
1977 — Travnicek, Petr vs Hardicsay, Peter — 0-1 — Olomouc CZE
1977 — Brondum, Eric vs Bjerring, Kai — 1-0 — Espergarde
1979 — Asmundsson, Ingvar vs Haraldsson, Haraldur — 1-0 — ISL-ch Reykjavik ISL