B34b — Sicilian: Accelerated Fianchetto, 5.Bc4

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Bc4 * ● Trait aux Noirs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

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Plans. Be3 (Fou actif (mobilité 5), Développer c1 — 43 % des parties) ; Nxc6 (Menace d8 — 25 % des parties) ; c3 (Renforcer le centre — 16 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

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Plans. ...Bg7 (Fianchetto, fou sur la grande diagonale — 93 % des parties) ; ...Nf6 (Développer g8 — 4 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	—	● f7→g6, h7→g6
Passés	—	—
Majorité	● aile dame 3v2	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● b5 (2v0), ● d5 (2v0)	—
Cases faibles	—	—
Centre	● d5 (2v0)	● e5 (1v0)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● d	● c

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bc4	● Bc4 Actif (mob. 9)
Bc8		● Bc8 Non développé (mob. 0)
Bf8		● Bf8 Non développé (mob. 2)
Paire de fous	● Oui	● Oui
Non développées	4 (● b1, ● c1, ● a1, ● h1)	5 (● g8, ● 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	—	● …d7-d5, ● …f7-f5

Partie
1948 Saltsjobaden Interzonal – Round 18 – Stoltz, Gabriel – 1/2-1/2 – Szabo, Ladislav – G164 1. e4 c5 2. Bc4 Nc6 3. Nf3 g6 4. d4 cxd4 5. Nxd4 Bg7 6. Nxc6 bxc6 7. c3 Qa5 8. O-O Nf6 9. Re1 d5 10. exd5 cxd5
1952 Miedzyzdroje – Round 1 – Grynfeld, Izaak – 0-1 – Gawlikowski, Stanislaw – G4 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Bc4 Bg7 6. Nxc6 bxc6 7. O-O d6 8. Qf3 Nf6 9. e5 dxe5 10. Qxc6+ Bd7
1954 URS Ch, semi final – Round 1 – Pimenov, Serafim – 1-0 – Bastrikov, Georgy – G50 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Bc4 Bg7 6. Nf3 Nf6 7. Nc3 O-O 8. O-O d6 9. Re1 Bg4 10. h3 Bxf3
1956 GBR Ch 43rd – Round 9.1 – Alexander, Conol Hugh – 1-0 – Barden, Leonard – G9 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Bc4 Bg7 6. Nxc6 bxc6 7. O-O Nh6 8. Nc3 O-O 9. Be3 d6 10. h3 Be6
1956 Hastings5657 – Round 7 – Alexander Ronald Cheng – 1/2-1/2 – Toran Albero, Roman – G31 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Bc4 Bg7 6. Nxc6 bxc6 7. O-O d6 8. Nc3 Nf6 9. Bf4 O-O 10. Qd2 Be6
1958 New York ch-USA – Round 7 – Mednis, Edmar J – 0-1 – Benko, Pal – G35 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Bc4 Bg7 6. Be3 Qa5+ 7. c3 Nf6 8. Nd2 O-O 9. O-O d6 10. h3 Bd7
1959 Dresden – Round 15 – Fichtl, Jiri – 1/2-1/2 – Padevsky, Nikola – G108 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Bc4 Bg7 6. Nxc6 bxc6 7. Nc3 Qa5 8. Qf3 Nf6 9. Bf4 O-O 10. O-O d6
1961 Hastings6162 – Round 5 – Robatsch, Karl – 1/2-1/2 – Wade, Robert G – G21 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Bc4 Bg7 6. Ne2 Nf6 7. Nbc3 O-O 8. O-O d6 9. f3 Na5 10. Bb3 b5
1964 Tel Aviv olm fin-B – Round 11 – Acevedo Ortega, Rodrigo Andres – 1-0 – Borja, Meliton – G135 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Bc4 Bg7 6. Nxc6 bxc6 7. O-O d6 8. Qf3 Be6 9. Bxe6 fxe6 10. e5 d5
1965 Budapest2 – Round 5 – Kovacs, Laszlo M – 1-0 – Pirc, Vasja – G30 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Bc4 Bg7 6. c3 Nf6 7. Nxc6 bxc6 8. e5 Nd5 9. Bxd5 cxd5 10. Qxd5 Rb8
1965 Harrachov U26 – Round 3 – Ferenc, Peter – 0-1 – Plachetka, Jan – G8 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Bc4 Bg7 6. c3 Nf6 7. Qe2 O-O 8. O-O Nxd4 9. cxd4 d5 10. exd5 Nxd5
1966 Panamerican – Round 1 – Acevedo Ortega, Rodrigo Andres – 1-0 – Cuellar Gacharna, Miguel – G37 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Bc4 Bg7 6. Nxc6 bxc6 7. O-O e6 8. Nc3 d5 9. exd5 cxd5 10. Nxd5 exd5

B34b — Accelerated Fianchetto (1948)

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Bc4

Les coups candidats

5…Bg7 — 92.7% (1174 parties)

Ambassadeurs : Pericka, Tomas (4x), Bade, Heidrun (4x), Wade, Robert G (3x), Langerak, Wouter (3x), Braeu, Ludwig (3x), Paoli, Enrico (2x), Wexler, Bernardo (2x), Robatsch, Karl (2x)

5…Nf6 — 3.8% (48 parties)

Ambassadeurs : Sarapu, Ortvin (1x), Frankel, Z. (1x), Scheipl, Ralf (1x), Putzbach, Gerd (1x), Moore, John R (1x), Levine, H. (1x), Cordero, Patricio (1x), Cortes Olivares, Ricardo (1x)

5…Qa5+ — 1.7% (21 parties)

Ambassadeurs : Vincent, Trevor (2x), Eisinger, Max Jr (1x), Christoph, Manfred, Dr. (1x), Ivanovic, Bozidar (1x), Rajkovic, Dusan (1x), Akampa Dickson (1x), Ralls, Nelson (1x), Majdanics, Imre (1x)

5…e6 — 0.9% (11 parties)

Ambassadeurs : Leonard, Johannes (1x), Willhelm, A. (1x), Tokarz, Piotr (1x), Barnhill D (1x), Koschka, Guenther (1x), Colpo, Manuel (1x), Wenger, Carsten (1x), Grote, Steffi (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	5…Bg7	5…Nf6	5…Qa5+	5…e6
<1800	207	93%	3%	1%	1%
1800-2200	580	93%	4%	2%	—
2200-2600	105	93%	4%	2%	—

Évolution par décennie (% des parties)

Décennie	N parties	5…Bg7	5…Nf6	5…Qa5+	5…e6
1950s	10	100%	—	—	—
1960s	32	94%	3%	3%	—
1970s	40	92%	2%	—	2%
1980s	30	90%	3%	3%	3%
1990s	264	91%	5%	2%	1%
2000s	387	92%	4%	2%	1%
2010s	401	94%	3%	1%	0%
2020s	102	95%	4%	—	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
5…Bg7	94%	95%	▲ +1.1%
5…Nf6	3%	4%	+0.4%
5…Qa5+	1%	0%	▼ -1.5%
5…e6	0%	0%	-0.5%

Parties historiques

5…Bg7 — 92.7% (1174 parties)

1952 — Grynfeld, Izaak vs Gawlikowski, Stanislaw — 0-1 — Miedzyzdroje
1954 — Pimenov, Serafim vs Bastrikov, Georgy — 1-0 — Erevan ARM
1955 — Paoli, Enrico vs Wade, Robert G — 1/2-1/2 — Mont Pelerin sur Vevey
1955 — Aleksandrov, Aleksej vs Korchnoi, Viktor — 1-0 — Riga LAT
1956 — Alexander, Conol Hugh vs Barden, Leonard — 1-0 — Blackpool ENG

5…Nf6 — 3.8% (48 parties)

1966 — Sarapu, Ortvin vs Frankel, Z. — 1-0 — New Zealand ch
1974 — Scheipl, Ralf vs Putzbach, Gerd — 1-0 — Menden
1986 — Moore, John R vs Levine, H. — 0-1 — Monroe ch-MI op
1992 — Tov Fisher vs Kirshner, M. — 0-1 — Fremont
1993 — Klein, Dieter vs Stock, Hugo — 1/2-1/2 — Bergisch Gladbach

5…Qa5+ — 1.7% (21 parties)

1968 — Eisinger, Max Jr vs Christoph, Manfred, Dr. — 1-0 — Waldkirch
1981 — Ivanovic, Bozidar vs Rajkovic, Dusan — 0-1 — Jugoslavija
1992 — Saltaev, Mihail vs Serper, Grigory — 1/2-1/2 — Uzbekistan
1993 — Majdanics, Imre vs Mate, Laszlo — 0-1 — Cuba
1995 — Akampa Dickson vs Ralls, Nelson — 0-1 — corr IECC CL-3

5…e6 — 0.9% (11 parties)

1972 — Leonard, Johannes vs Willhelm, A. — 1-0 — Ventura
1988 — Tokarz, Piotr vs Barnhill D — 0-1 — ?
1994 — Koschka, Guenther vs Colpo, Manuel — 1-0 — Erlangen
1999 — Wenger, Carsten vs Grote, Steffi — 1-0 — Oberhof
2001 — Walz Thomas vs Neukoetter, Moritz — 0-1 — Sebnitz