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 O-O * ○ Trait aux Blancs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

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

Côté adverse. Le fou enfermé en e7.

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

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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. Plusieurs pièces dorment encore (le cavalier b8 et la tour a8).

Plans. ...Nc6 (Développer Nb8) ; ...Bg4 (Clouer Nf3) ; ...d6 (Rupture) ; ...d5 (Rupture) ; ...e5 (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. 1)
Paire de fous	● Oui	● Oui
Non développées	2 (c1, a1)	2 (b8, a8)

Sécurité du roi

	♔ Blancs	♚ Noirs
Statut	● Roqué	● Roqué
Droits de roque	—	—

Thèmes

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

Partie
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 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 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
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 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
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 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
1975 URS Team Ch – Round 1 – Pavlenko, Oleg – 1/2-1/2 – Uusi, Gunnar – G564 1. Nf3 Nf6 2. c4 e6 3. Nc3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. b3 O-O 8. Bb2 d5 9. cxd5 Nxd5 10. Rc1 Nd7
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
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
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
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
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
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

A30p — Symmetrical Hedgehog

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

Eval: [+0.21]

Les coups candidats

8.Bb2 — 88.2% (1470 parties)

Ambassadeurs : Ftacnik, Lubomir (15x), Kekki, Jorma (8x), Smejkal, Jan (7x), Geller, Efim P. (6x), Karlsson, Lars 1937 (6x), Bischoff, Klaus (6x), Kasparov, Garry (5x), Ljubojevic, Ljubomir (5x)

8.d4 — 9.7% (162 parties)

Ambassadeurs : Suba, Mihai (6x), Demuth, Adrien (3x), Dzindzichashvili, Roman (2x), Dorfman, Iossif (2x), Garcia Palermo, Carlos Horacio (2x), Tompa, Janos (2x), Gross, Stefan (2x), Gedevanishvili, Dmitry (2x)

8.e3 — 1.6% (26 parties)

Ambassadeurs : Espig, Lutz (7x), Boensch, Uwe (2x), Sturua, Zurab (1x), Tseshkovsky, Vitaly (1x), Stefanov, Parik (1x), Ayan Schneider (1x), Csom, Istvan (1x), Gruenberg, Hans-Ulrich (1x)

8.d3 — 0.2% (3 parties)

Ambassadeurs : Kshitij Kural (1x), Bamri Slim (1x), Bayod Martinez, Angel (1x), Alonso Garcia, Rene Marcial (1x), Lehmann Garcia, Daniel William (1x), Bezviner, L. (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	8.Bb2	8.d4	8.e3	8.d3
<1800	20	90%	5%	5%	—
1800-2200	450	91%	7%	1%	—
2200-2600	960	87%	11%	2%	—
2600+	40	95%	2%	2%	—

Évolution par décennie (% des parties)

Décennie	N parties	8.Bb2	8.d4	8.e3	8.d3
1920s	1	100%	—	—	—
1930s	1	100%	—	—	—
1940s	8	100%	—	—	—
1950s	19	84%	16%	—	—
1960s	12	100%	—	—	—
1970s	91	86%	13%	1%	—
1980s	212	84%	12%	3%	0%
1990s	265	83%	14%	2%	1%
2000s	451	90%	8%	2%	—
2010s	502	90%	8%	1%	—
2020s	104	91%	9%	—	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
8.Bb2	90%	91%	▲ +1.1%
8.d4	8%	9%	+0.5%
8.e3	1%	0%	▼ -1.2%
8.d3	0%	0%	+0.0%

Joueurs célèbres

Champions du monde dans cette position

Kasparov, Garry — 7 parties
Carlsen, Magnus — 4 parties
Smyslov, Vladimir — 3 parties
Tal, Mikhail — 2 parties
Karpov, Aleksandr — 1 partie
Hou, Yifan — 1 partie
Botvinnik, Mikhail — 1 partie

Parties historiques

8.Bb2 — 88.2% (1470 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
1945 — Popovic, Vojislav vs Radojcic, Slobodan — 1-0 — Novi Sad SRB
1946 — Golombek, Harry vs Pachman, Ludek — 1/2-1/2 — Prague CZE

8.d4 — 9.7% (162 parties)

1955 — Barcza, Gedeon vs Pachman, Ludek — 0-1 — Prague tm Prague CZE
1957 — Sokolsky, Alexey vs Uusi, Gunnar — 1/2-1/2 — Minsk BLR
1958 — Cuellar Gacharna, Miguel vs Sliwa, Bogdan — 1-0 — Munich GER
1976 — Uhlmann, Wolfgang vs Spiridonov, Nikola — 1/2-1/2 — Halle GER
1977 — Espig, Lutz vs Tompa, Janos — 1/2-1/2 — Leipzig GER

8.e3 — 1.6% (26 parties)

1979 — Espig, Lutz vs Boensch, Uwe — 1/2-1/2 — It Berlin GER
1980 — Espig, Lutz vs Gruenberg, Hans-Ulrich — 1/2-1/2 — Leipzig GER
1980 — Espig, Lutz vs Lorenz, Gerd — 1-0 — Plauen
1981 — Espig, Lutz vs Tseshkovsky, Vitaly — 0-1 — Sochi RUS
1981 — Espig, Lutz vs Stefanov, Parik — 1-0 — Sochi RUS

8.d3 — 0.2% (3 parties)

1981 — Kshitij Kural vs Bamri Slim — 1-0 — Graz WTch jr
1992 — Lehmann Garcia, Daniel William vs Bezviner, L. — 0-1 — New York, NY USA
1994 — Bayod Martinez, Angel vs Alonso Garcia, Rene Marcial — 1-0 — AUT94S10

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