A30p — English: Symmetrical, Hedgehog, 7.b3

1.c4 c5 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.b3 * ● Trait aux Noirs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Atouts. Les Blancs s'appuient sur la case forte b5 et la paire de fous.

Côté adverse. Le fou enfermé en e7 et le roi resté au centre.

En contrepartie. Plusieurs pièces dorment encore (le fou c1 et la tour a1).

Plans. d3 (Libérer Bc1) ; h3 (Empêcher ...Bg4).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Atouts. Les Noirs s'appuient sur la case forte e4, un fou actif en b7 et la paire de fous.

Côté adverse. Les fous enfermés en c1 et g2.

En contrepartie. Le roi n'est pas encore à l'abri et plusieurs pièces dorment encore (le cavalier b8 et les tours a8 et h8).

Plans. O-O (Mettre le roi en sécurité, connecter les tours) ; ...Nc6 (Développer Nb8) ; ...Bg4 (Clouer Nf3) ; ...d6 (Rupture) ; ...d5 (Rupture).

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● a2→b3, f2→g3, h2→g3, b3→c4	● b6→c5, a7→b6, d7→e6, f7→e6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● b5 (2v0)	● e4 (2v1)
Cases faibles	—	—
Centre	● e5 (1v0)	● d5 (3v2), ● e4 (2v1)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 2)
Bg2	● Bg2 Enfermé (mob. 2)
Bb7		● Bb7 Actif (mob. 6)
Be7		● Be7 Enfermé (mob. 2)
Paire de fous	● Oui	● Oui
Non développées	2 (c1, a1)	3 (b8, a8, h8)

Sécurité du roi

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

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	semi-ouvert
Ruptures	● d2-d3, ● e2-e3	● …d7-d6, ● …d7-d5, ● …e6-e5

Partie
1927 Bad Niendorf – Round 1 – Nimzowitsch, Aron – 1/2-1/2 – Colle, Edgar – G3 1. c4 Nf6 2. Nc3 c5 3. Nf3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. Bb2 d6 9. d4 cxd4 10. Nxd4 Bxg2
1927 New York – Round 1 – Alekhine, Alexander – 1/2-1/2 – Nimzowitsch, Aron – G16 1. Nf3 Nf6 2. c4 e6 3. Nc3 b6 4. g3 Bb7 5. Bg2 c5 6. O-O Be7 7. b3 d5 8. Ne5 Nbd7 9. f4 Bd6 10. cxd5 exd5
1937 Budapest – Round 1 – Schreiber Pitot, Beryl – 1-0 – Barcza, Gedeon – G16 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. O-O c5 6. Nc3 Be7 7. b3 d5 8. cxd5 Nxd5 9. Nxd5 Bxd5 10. Bb2 Bf6
1940 URS-sf – Round 1 – Goldberg, Grigory A – 1-0 – Zhukhovitsky, Samuel – G6 1. c4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 c5 5. O-O e6 6. Nc3 Be7 7. b3 O-O 8. Bb2 d6 9. d4 cxd4 10. Nxd4 Bxg2
1944 URS Ch sf – Round 12 – Rokhlin, Yakov Geraisimovich – 1/2-1/2 – Averbakh, Yuri L – G12 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. b3 Be7 6. Bb2 c5 7. O-O O-O 8. Nc3 d6 9. e3 Ne4 10. Qc2 Nxc3
1946 Mar del Plata – Round 1 – Bauza, Lorenzo – 0-1 – Luckis, Marcos – G29 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. O-O Be7 6. Nc3 O-O 7. b3 c5 8. Bb2 d5 9. cxd5 Nxd5 10. Nxd5 Bxd5
1946 Moscow-Prague tt – Round 1 – Zíta, František – 1/2-1/2 – Bondarevsky, Igor – G2 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. O-O c5 6. Nc3 Be7 7. b3 O-O 8. Bb2 d5 9. cxd5 Nxd5 10. Nxd5 Bxd5
1946 Treybal Memorial – Round 1 – Golombek – 1-0 – Opocensky, Karel – G2 1. c4 e6 2. Nf3 Nf6 3. g3 b6 4. Bg2 Bb7 5. O-O Be7 6. Nc3 c5 7. b3 d5 8. cxd5 exd5 9. d4 Ne4 10. Bb2 O-O
1946 Treybal Memorial – Round 3 – Golombek, Harry – 1/2-1/2 – Pachman, Ludek – G13 1. c4 e6 2. Nf3 Nf6 3. g3 b6 4. Bg2 Bb7 5. O-O c5 6. Nc3 Be7 7. b3 O-O 8. Bb2 Qc8 9. d4 cxd4 10. Nxd4 Bxg2
1948 Mar del Plata – Round 14 – Stahlberg, Gideon – 1-0 – Sanguinetti, Ricardo – G118 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. O-O Be7 6. Nc3 O-O 7. b3 c5 8. Bb2 Nc6 9. d4 Nxd4 10. Nxd4 Bxg2
1949 Oldenburg – Round 7 – Heemsoth, Hermann – 0-1 – Zemgalis – G22 1. c4 Nf6 2. Nf3 e6 3. g3 b6 4. Bg2 Bb7 5. O-O Be7 6. Nc3 c5 7. b3 d5 8. cxd5 Nxd5 9. Nxd5 Bxd5 10. Bb2 Bf6
1949 Trencianske Teplice – Round 13 – Gideon, Stahlberg hlberg – 1/2-1/2 – Pachman, Ludek – G74 1. c4 Nf6 2. Nf3 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. Bb2 d5 9. cxd5 Nxd5 10. Qc2 Nxc3
1949 URS Ch, semi final – Round 1 – Kasparian, Genrikh – 1/2-1/2 – Makogonov, Vladimir – G27 1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. c4 c5 5. Nc3 e6 6. O-O Be7 7. b3 d5 8. cxd5 Nxd5 9. Nxd5 Bxd5 10. Bb2 O-O
1950 Amsterdam – Round 14 – Ståhlberg, Gideon – 1-0 – Szabados, Eugenio – G132 1. c4 Nf6 2. Nf3 c5 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. b3 O-O 8. Bb2 d5 9. cxd5 Nxd5 10. Nxd5 Bxd5
1950 Amsterdam ch-NED – Round 1 – Euwe, Max – 1-0 – Stumpers, Louis – G41 1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. c4 e6 5. O-O c5 6. Nc3 Be7 7. b3 Ne4 8. Bb2 Nxc3 9. Bxc3 O-O 10. d4 Bf6
1950 Bled – Round 9 – Milic, Borislav – 0-1 – Puc, Stojan – G50 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. O-O c5 6. Nc3 Be7 7. b3 O-O 8. Bb2 d6 9. Rc1 Nbd7 10. d4 Ne4
1950 Candidats Tournament – Round 1 – Stahlberg, Gideon – 0-1 – Keres, Paul – G5 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. Bb2 d5 9. cxd5 Nxd5 10. d4 Na6
1950 HUN-ch06 – Round 1 – Monostori, Lajos – 1/2-1/2 – Pogats, Jozsef Jr. – G67 1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. O-O c5 5. c4 e6 6. Nc3 Be7 7. b3 O-O 8. Bb2 d5 9. Ne5 Nc6 10. f4 Rc8
1950 Mar del Plata – Round 15 – Pirc, Vasja – 1-0 – Marini, Liam – G130 1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. O-O e6 5. c4 Be7 6. Nc3 O-O 7. b3 c5 8. Bb2 d5 9. Ne5 Nc6 10. f4 Rc8
1951 Hungary Ch – Round 1 – Szily, Jozsef – 1/2-1/2 – Pogats, Jozsef Jr. – G31 1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. O-O c5 5. c4 e6 6. Nc3 Be7 7. b3 O-O 8. Bb2 d5 9. Ne5 Nbd7 10. d4 cxd4
1954 URS Ch sf Leningrad RUS – Round 1 – Kuzminykh, Evgeny – 1/2-1/2 – Spassky, Boris Vasily – G1 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. Bb2 d5 9. cxd5 exd5 10. Ne5 Nc6
1955 Prague tm Prague CZE – Round 2 – Barcza, Gedeon – 0-1 – Pachman, Ludek – G17 1. Nf3 c5 2. c4 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. d4 d5 9. Ne5 Nbd7 10. cxd5 Nxe5
1956 Candidats Tournament – Round 5 – Keres, Paul Petrovich – 1/2-1/2 – Geller, Efim P – G20 1. c4 c5 2. Nf3 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. Bb2 d5 9. cxd5 Nxd5 10. Qc2 Nc6
1956 GDR Ch Leipzig GER – Round 2 – Zirngibl, Albert – 1/2-1/2 – Rittner, Horst – G4 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. Bb2 Qc8 9. d4 cxd4 10. Qxd4 Nc6
1957 Minsk zt – Round 13 – Sokolsky, Alexey – 1/2-1/2 – Uusi, Gunnar – G86 1. c4 e6 2. Nc3 c5 3. Nf3 Nf6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. d4 cxd4 9. Nxd4 Bxg2 10. Kxg2 d5
1957 Vienna AUT – Round 1 – Heinicke, Herbert – 0-1 – Nedeljkovic, Srecko M – G2 1. c4 Nf6 2. Nf3 e6 3. g3 b6 4. Bg2 Bb7 5. O-O Be7 6. Nc3 O-O 7. b3 c5 8. Bb2 d5 9. cxd5 exd5 10. d4 Nbd7
1957 Wageningen zt – Round 13 – Stahlberg, Gideon – 1-0 – Hanninen, Veikko – G38 1. Nf3 Nf6 2. c4 b6 3. g3 Bb7 4. Bg2 e6 5. O-O Be7 6. Nc3 O-O 7. b3 c5 8. Bb2 d5 9. cxd5 Nxd5 10. Nxd5 Qxd5
1958 Munich olm prel – Round 7 – Cuellar Gacharna, Miguel – 1-0 – Sliwa, Bogdan – G150 1. c4 Nf6 2. Nf3 e6 3. g3 b6 4. Bg2 Bb7 5. O-O c5 6. Nc3 Be7 7. b3 O-O 8. d4 cxd4 9. Qxd4 Nc6 10. Qf4 Qb8
1958 YUG Ch 13th – Round 1 – Sofrevski, Jovan – 1-0 – Sokolov, Vladimir – G2 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. Bb2 Nc6 9. d4 Nxd4 10. Nxd4 Bxg2
1960 Budapest – Round 2 – Szilagyi, Gyorgy Laszlo – 1/2-1/2 – Nedeljkovic, Streck – G17 1. c4 Nf6 2. Nf3 e6 3. g3 b6 4. Bg2 Bb7 5. O-O Be7 6. Nc3 O-O 7. b3 c5 8. Bb2 d5 9. cxd5 exd5 10. d4 Re8
1960 Leipzig olm prel – Round 5 – Böök, Eero – 1-0 – Porath, Yosef – G148 1. c4 Nf6 2. Nc3 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 c5 6. O-O Be7 7. b3 O-O 8. Bb2 d5 9. cxd5 Nxd5 10. d4 Nxc3
1963 Zonal Enschede NED – Round 1 – Popov, Luben – 1/2-1/2 – Van Scheltinga, Theo – G4 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. Bb2 d5 9. cxd5 exd5 10. d4 Nc6
1965 Hamburg etc – Round 1 – Matulovic, Milan – 1/2-1/2 – Lengyel, Laszlo – G5 1. c4 Nf6 2. Nc3 c5 3. g3 e6 4. Nf3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. Bb2 d5 9. Ne5 Nc6 10. Nxc6 Bxc6
1965 ISR Ch – Round 1 – Ben Moshe, Shalom – 0-1 – Porath, Yosef – G3 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. Nc3 c5 6. O-O Be7 7. b3 d5 8. cxd5 Nxd5 9. Nxd5 Bxd5 10. Bb2 O-O
1967 Clare Benedict Cup 14th – Round 4.3 – Besser, Hans – 1/2-1/2 – Hartston, William R – G22 1. Nf3 c5 2. g3 Nf6 3. c4 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. b3 O-O 8. Bb2 d5 9. cxd5 Nxd5 10. Nxd5 Bxd5
1967 Sousse Interzonal – Round 10 – Barczay, Laszlo – 1/2-1/2 – Matulovic, Milan – G95 1. Nf3 c5 2. g3 Nf6 3. Bg2 e6 4. c4 Be7 5. b3 b6 6. Bb2 Bb7 7. O-O O-O 8. Nc3 d6 9. d4 Nbd7 10. Ne1 Bxg2
1967 Winnipeg – Round 7 – Larsen, Benjamin Holsko – 1/2-1/2 – Keres, Paul – G35 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. Bb2 d5 9. Ne5 Qc7 10. Nb5 Qc8
1968 Varna BUL – Round 9 – Flesch, Janos – 1-0 – Padevsky, Nikola – G24 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. Bb2 a6 9. d4 d6 10. d5 exd5
1969 Belgrade – Round 1 – Geller, Efim P – 1-0 – Matanovic, Aleksandar – G4 1. Nf3 Nf6 2. c4 e6 3. Nc3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. b3 c5 8. Bb2 d5 9. e3 Nbd7 10. Qe2 dxc4
1989 1er Torneo de Ajedrez Ciudad de Linares – Round 5 – Jussupow, Artur – 1/2-1/2 – Portisch, Lajos – G50 1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. g3 Be7 5. Bg2 O-O 6. O-O dxc4 7. Qc2 a6 8. a4 Bd7 9. Qxc4 Bc6 10. Bg5 Bd5
20. European Teams 2015 – Round 5.6 – Carlsen, Magnus – 0-1 – Pelletier, Yannick – G224 1. c4 Nf6 2. Nc3 c5 3. Nf3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. Bb2 d6 9. d4 cxd4 10. Nxd4 Bxg2
22. ECU Club Cup 2006 – Round 7 – Huzman, Alexander – 1/2-1/2 – Van Wely, Loek – G169 1. c4 Nf6 2. Nc3 c5 3. g3 e6 4. Nf3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. e3 d6 9. Bb2 Nbd7 10. d4 Ne4
34. ECC Open 2018 – Round 2.13 – Bauer, Christian – 1/2-1/2 – Kjartansson, Gudmundur – G45 1. Nf3 Nf6 2. c4 e6 3. b3 c5 4. Bb2 b6 5. g3 Bb7 6. Bg2 Be7 7. O-O O-O 8. Nc3 d6 9. e3 Ne4 10. Ne2 Bf6
34. ECC Open 2018 – Round 4.10 – Bauer, Christian – 1-0 – Gorodetzky, David – G116 1. c4 e6 2. Nf3 Nf6 3. b3 b6 4. g3 Bb7 5. Bg2 c5 6. O-O Be7 7. Nc3 d5 8. e3 O-O 9. Bb2 dxc4 10. bxc4 Nc6
Amber Rapidplay 2002 – Round 4 – Ivanchuk, Vasyl – 1-0 – Ljubojevic, Ljubomir – G19 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. Bb2 d5 9. e3 Nc6 10. cxd5 exd5
Biel Interzonal 1976 – Round 15 – Geller, Efim P – 1/2-1/2 – Smejkal, Jan – G70 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. Bb2 d5 9. e3 dxc4 10. bxc4 Nc6
Candidats qf1 1983 – Round 9 – Korchnoi, Viktor – 1-0 – Portisch, Lajos – G6 1. Nf3 Nf6 2. c4 e6 3. Nc3 b6 4. g3 Bb7 5. Bg2 c5 6. O-O Be7 7. b3 d6 8. Bb2 O-O 9. e3 a6 10. d4 cxd4
Cote d'Ivoire Blitz 2019 – Round 11.1 – Vachier-Lagrave, Maxime – 1-0 – Carlsen, Magnus – G51 1. c4 c5 2. Nf3 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. Bb2 d6 9. e3 Nbd7 10. Qe2 a6
FIDE WCh KO 2001 – Round 1.4 – Bruzon Batista, Lazaro – 1/2-1/2 – Nisipeanu, Liviu-Dieter – G134 1. c4 e6 2. Nf3 c5 3. Nc3 Nf6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. Bb2 d6 9. e3 Nbd7 10. Qe2 Ne4
FIDE WCh KO 2001 – Round 1.6 – Bruzon Batista, Lazaro – 0-1 – Nisipeanu, Liviu-Dieter – G156 1. c4 Nf6 2. Nf3 c5 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. b3 O-O 8. Bb2 d6 9. e3 Nbd7 10. d4 cxd4
FIDE World Cup 2019 – Round 3.8 – Jakovenko, Dmitry – 1/2-1/2 – Vachier-Lagrave, Maxime – G360 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. Bb2 d6 9. e3 Nbd7 10. Qe2 a6
GMA 2004 – Round 2 – Timman, Jan H – 0-1 – Leko, Peter – G13 1. Nf3 c5 2. b3 Nf6 3. Bb2 e6 4. g3 b6 5. Bg2 Bb7 6. c4 Be7 7. O-O d6 8. Nc3 O-O 9. e3 Nbd7 10. Qe2 a6
IBM 1980 – Round 1 – Timman, Jan H – 1-0 – Van der Wiel, John T.H. – G4 1. c4 Nf6 2. Nc3 e6 3. Nf3 b6 4. g3 c5 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. Bb2 d5 9. e3 Nc6 10. cxd5 Nxd5
Interpolis 1983 – Round 1 – Spassky, Boris V. – 1/2-1/2 – Portisch, Lajos – G43 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 d5 8. e3 O-O 9. Bb2 dxc4 10. bxc4 Nc6
Lindores Abbey Tal Memorial 2021 – Round 8.10 – Abdusattorov, Nodirbek – 1-0 – Oparin, Grigoriy – G340 1. c4 Nf6 2. Nc3 c5 3. g3 e6 4. Nf3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. Bb2 d5 9. e3 Qc8 10. Rc1 Rd8
Manila Interzonal 1990 – Round 13 – Damljanovic, Branko – 1/2-1/2 – Ljubojevic, Ljubomir – G224 1. Nf3 c5 2. c4 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. Bb2 d5 9. e3 dxc4 10. bxc4 Nc6
Mar del Plata 1982 – Round 1 – Panno, Oscar – 1/2-1/2 – Portisch, Lajos – G53 1. Nf3 c5 2. c4 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 d5 8. e3 O-O 9. Bb2 dxc4 10. bxc4 Nc6
Moscow 1981 – Round 1 – Smejkal, Jan – 1/2-1/2 – Kasparov, Garry – G36 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. Bb2 d6 9. e3 Nbd7 10. Qe2 a6
Moscow 1981 – Round 1 – Smyslov, Vassily – 1/2-1/2 – Polugaevsky, Lev – G34 1. Nf3 Nf6 2. c4 b6 3. g3 c5 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. b3 d5 8. cxd5 Nxd5 9. Nxd5 Bxd5 10. Bb2 O-O
Moscow 1981 – Round 1 – Smyslov, Vassily – 1/2-1/2 – Portisch, Lajos – G2 1. c4 c5 2. Nf3 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 d5 8. cxd5 Nxd5 9. Nxd5 Bxd5 10. Bb2 O-O
Moscow-4teams 1981 – Round 1 – Smyslov, Vassily – 0-1 – Kasparov, Garry – G17 1. Nf3 c5 2. c4 Nf6 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. b3 O-O 8. Bb2 d6 9. e3 Nbd7 10. d4 a6
Novi Sad olm 1990 – Round 7 – Korchnoi, Viktor – 1-0 – Wahjuwidajat, Utut Adianto – G40 1. c4 Nf6 2. Nc3 c5 3. Nf3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. Bb2 d5 9. e3 Nbd7 10. Qe2 Qc7
Olympiad 2002 – Round 12 – Istratescu, Andrei – 1/2-1/2 – Stefansson, Hannes – G392 1. c4 Nf6 2. Nc3 c5 3. Nf3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. Bb2 d6 9. d4 cxd4 10. Nxd4 Bxg2
Riga Interzonal 1979 – Round 17 – Polugaevsky, Lev – 1/2-1/2 – Gheorghiu, Florin – G47 1. Nf3 c5 2. c4 Nf6 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. b3 O-O 8. Bb2 d6 9. d4 cxd4 10. Nxd4 Bxg2
World Blitz 2015 – Round 8.54 – Demuth, Adrien – 1-0 – Kryvoruchko, Yuriy – G509 1. Nf3 Nf6 2. c4 b6 3. g3 Bb7 4. Bg2 e6 5. O-O Be7 6. Nc3 O-O 7. b3 c5 8. Bb2 d5 9. e3 dxc4 10. bxc4 Nc6
World Blitz 2017 – Round 19.54 – Salgado Lopez, Ivan – 1-0 – Saeed, Ishaq – G1017 1. Nf3 Nf6 2. b3 e6 3. Bb2 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. c4 c5 8. Nc3 d6 9. d4 cxd4 10. Qxd4 a6
World Blitz 2019 – Round 13.26 – Anton Guijarro, David – 0-1 – Abdusattorov, Nodirbek – G871 1. Nf3 Nf6 2. b3 b6 3. g3 Bb7 4. Bg2 e6 5. Bb2 c5 6. O-O Be7 7. c4 O-O 8. Nc3 d6 9. d4 cxd4 10. Nxd4 Bxg2
World Cup 1989 – Round 1 – Huebner, Robert – 1/2-1/2 – Ribli, Zoltan – G3 1. c4 c5 2. Nf3 Nf6 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. b3 d6 8. Bb2 a6 9. d4 cxd4 10. Nxd4 Bxg2

A30p — Symmetrical Hedgehog

1.c4 c5 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.b3

Eval: [+0.11]

Les coups candidats

7…O-O — 75.3% (1492 parties) →

Ambassadeurs : Ftacnik, Lubomir (16x), Espig, Lutz (10x), Suba, Mihai (9x), Kekki, Jorma (8x), Smejkal, Jan (7x), Karlsson, Lars 1937 (6x), Gipslis, Aivars (6x), Bischoff, Klaus (6x)

7…d6 — 12.8% (254 parties)

Ambassadeurs : Brodsky, Michail (4x), Stone, Raymond (3x), King, Daniel J (3x), Ribli, Zoltan (2x), Belotti, Bruno (2x), Suba, Mihai (2x), Ftacnik, Lubomir (2x), Vogt, Lothar (2x)

7…d5 — 7.7% (152 parties)

Ambassadeurs : Portisch, Lajos (5x), Smejkal, Jakub (3x), Hort, Vlastimil (3x), Botvinnik, Mikhail (2x), De Firmian, Nick (2x), Darga, Klaus (2x), Smyslov, Vladimir (2x), Ribli, Zoltan (2x)

7…a6 — 2.9% (58 parties)

Ambassadeurs : Ekenberg, Bengt (2x), Szmetan, Jorge (2x), Andersen Zargham, Ellene (1x), Andersen, Erik (1x), Kestler, Hans-Guenther (1x), Raaste, Eero J. (1x), Needleman, Alejandro (1x), Hoffman, Alejandro (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	7…O-O	7…d6	7…d5	7…a6
<1800	21	86%	10%	—	—
1800-2200	513	76%	14%	5%	3%
2200-2600	1191	74%	13%	8%	3%
2600+	48	77%	12%	10%	—

Évolution par décennie (% des parties)

Décennie	N parties	7…O-O	7…d6	7…d5	7…a6
1920s	2	50%	—	50%	—
1930s	4	25%	—	25%	50%
1940s	8	62%	—	38%	—
1950s	17	88%	—	6%	—
1960s	14	71%	—	29%	—
1970s	98	82%	6%	11%	1%
1980s	280	69%	16%	12%	3%
1990s	313	73%	13%	7%	5%
2000s	547	75%	15%	5%	3%
2010s	577	78%	12%	7%	2%
2020s	122	80%	10%	7%	4%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
7…O-O	78%	80%	▲ +1.7%
7…d6	12%	10%	▼ -2.5%
7…d5	7%	7%	-0.2%
7…a6	2%	4%	▲ +1.8%

Joueurs célèbres

Champions du monde dans cette position

Kasparov, Garry — 8 parties
Smyslov, Vladimir — 5 parties
Carlsen, Magnus — 4 parties
Botvinnik, Mikhail — 3 parties
Tal, Mikhail — 2 parties
Alekhine, Alexander — 1 partie
Euwe, Max — 1 partie
Karpov, Aleksandr — 1 partie
Hou, Yifan — 1 partie

Parties historiques

7…O-O — 75.3% (1492 parties)

1927 — Nimzowitsch, Aron vs Colle, Edgar — 1/2-1/2 — Bad Niendorf
1930 — Illingworth, Leonard vs Mortlock, Alfred — 1-0 — Hastings ENG
1940 — Goldberg, Grigory A vs Zhukhovitsky, Samuel — 1-0 — Kiev UKR
1946 — Golombek, Harry vs Pachman, Ludek — 1/2-1/2 — Prague CZE
1946 — Zíta, František vs Bondarevsky, Igor — 1/2-1/2 — Moscow-Prague tt

7…d6 — 12.8% (254 parties)

1976 — Spassov, Liuben vs Ornstein, Axel — 1/2-1/2 — Oslo NOR
1978 — Uhlmann, Wolfgang vs Vogt, Lothar — 1/2-1/2 — Halle GER
1978 — Odendahl, Steven vs Weinstein, Norman — 1/2-1/2 — Lone Pine, CA USA
1978 — Biyiasas, Peter vs Rohland, Michael Karl — 1/2-1/2 — Toronto ch-CAN - zt
1978 — Espig, Lutz vs Vogt, Lothar — 1/2-1/2 — Halle GER

7…d5 — 7.7% (152 parties)

1927 — Alekhine, Alexander vs Nimzowitsch, Aron — 1/2-1/2 — New York, NY USA
1937 — Schreiber Pitot, Beryl vs Barcza, Gedeon — 1-0 — Budapest HUN
1946 — Golombek vs Opocensky, Karel — 1-0 — Prague CZE
1949 — Heemsoth, Hermann vs Zemgalis — 0-1 — ?
1949 — Kasparian, Genrikh vs Makogonov, Vladimir — 1/2-1/2 — Tbilisi GEO

7…a6 — 2.9% (58 parties)

1935 — Ekenberg, Bengt vs Andersen Zargham, Ellene — 1-0 — Skane-Kopenhagen
1935 — Ekenberg, Bengt vs Andersen, Erik — 1-0 — Helsingborg
1976 — Kestler, Hans-Guenther vs Raaste, Eero J. — 1/2-1/2 — Haifa ISR
1983 — Needleman, Alejandro vs Hoffman, Alejandro — 1-0 — ch.Juv.ARG.
1983 — Karlsson, Lars 1937 vs Gurevich, Dmitry — 1-0 — Helsinki FIN

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