Structure de pions

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

Cases

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

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bg2	● Bg2 Ok (mob. 2)
Bb7		● Bb7 Actif (mob. 5)
Bf8		● Bf8 Non développé (mob. 2)
Paire de fous	● Oui	● Oui
Non développées	2 (● c1, ● a1)	4 (● b8, ● f8, ● 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	mobile
Ruptures	● d2-d4	● …d7-d5

A30i — English: Symmetrical, Hedgehog, 6…a6

1.c4 c5 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 a6 * ○ Trait aux Blancs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plans. d4 (Occuper le centre — 41 % des parties) ; b3 (Préparer le fianchetto — 35 % des parties) ; Re1 (18 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plans. ...d6 (Solidifier le centre, libérer le fou — 30 % des parties) ; ...Be7 (Développer f8 — 24 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Partie
1934 Copenhagen – Round 1 – Klausen, V. – 0-1 – Andersen, Erik – G1 1. c4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 e6 5. O-O c5 6. Nc3 a6 7. d3 Qc7 8. a3 Be7 9. Rb1 Nc6 10. Bf4 d6
20. European Teams 2015 – Round 9.12 – Laznicka, Viktor – 1/2-1/2 – Perunovic, Milos – G375 1. Nf3 c5 2. c4 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O a6 7. b3 Be7 8. d4 cxd4 9. Nxd4 Bxg2 10. Kxg2 Qc7
41. Olympiad Open 2014 – Round 10.7 – Grischuk, Alexander – 1/2-1/2 – Perunovic, Milos – G732 1. c4 c5 2. Nc3 Nf6 3. g3 e6 4. Nf3 b6 5. Bg2 Bb7 6. O-O a6 7. d4 cxd4 8. Qxd4 d6 9. Bg5 Nbd7 10. Qd2 Rc8
43. Olympiad 2018 – Round 1.7 – Kojima, Shinya – 1/2-1/2 – Sargissian, Gabriel – G70 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O a6 7. d4 cxd4 8. Qxd4 d6 9. Bg5 Nbd7 10. Rfd1 Be7
Amber-rapid 13th 2004 – Round 3 – Gelfand, Boris – 0-1 – Ivanchuk, Vasyl – G9 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O a6 7. b3 d6 8. Bb2 Be7 9. e3 O-O 10. Qe2 Nbd7
Amber-rapid 20th 2011 – Round 7 – Kramnik, Vladimir – 0-1 – Carlsen, Magnus – G21 1. Nf3 Nf6 2. c4 b6 3. g3 c5 4. Bg2 Bb7 5. O-O e6 6. Nc3 a6 7. b3 Be7 8. Bb2 O-O 9. e3 d6 10. d4 Ne4
Bugojno 1978 – Round 14 – Huebner, Robert – 1-0 – Ljubojevic, Ljubomir – G81 1. Nf3 c5 2. c4 Nf6 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 a6 7. d4 cxd4 8. Qxd4 d6 9. b3 Nbd7 10. Bb2 Be7
Erevan ch-URS 1975 – Round 1 – Petrosian, Tigran V. – 1/2-1/2 – Balashov, Yuri S – G14 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O a6 7. Re1 d6 8. e4 Nbd7 9. b3 Be7 10. d4 cxd4
Erevan ch-URS 1975 – Round 1 – Tal, Mikhail – 1/2-1/2 – Balashov, Yuri S – G10 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O a6 7. Re1 d6 8. d4 cxd4 9. Nxd4 Bxg2 10. Kxg2 Be7
IBM 1978 – Round 6 – Nikolac, Juraj – 1-0 – Ljubojevic, Ljubomir – G17 1. Nf3 c5 2. c4 Nf6 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 a6 7. b3 d6 8. Bb2 Nbd7 9. e3 Rb8 10. Qe2 Be7
Interpolis 1984 – Round 1 – Miles, Anthony J – 1/2-1/2 – Tukmakov, Vladimir B – G8 1. c4 Nf6 2. Nc3 c5 3. g3 e6 4. Nf3 b6 5. Bg2 Bb7 6. O-O a6 7. b3 d6 8. Bb2 Be7 9. d4 cxd4 10. Nxd4 Bxg2
Interpolis 1987 – Round ? – Korchnoi, Viktor – 1/2-1/2 – Sokolov, Andrei – G32 1. c4 Nf6 2. Nf3 e6 3. Nc3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O a6 7. b3 Qc7 8. e3 Be7 9. d4 cxd4 10. exd4 d5
Interpolis 1987 – Round 1 – Andersson, Ulf 1949 – 1/2-1/2 – Sokolov, Andrei – G27 1. Nf3 c5 2. c4 Nf6 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 a6 7. b3 Qc7 8. Bb2 Be7 9. e3 O-O 10. Qe2 Rd8
Interpolis 1989 – Round 2 – Korchnoi, Viktor – 1/2-1/2 – Ivanchuk, Vasyl – G7 1. c4 Nf6 2. Nc3 c5 3. Nf3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O a6 7. b3 d6 8. Bb2 Be7 9. d4 cxd4 10. Nxd4 Bxg2
Linares 1985 – Round 1 – Miles, Anthony J – 1/2-1/2 – Polugaevsky, Lev – G6 1. c4 e6 2. Nc3 c5 3. Nf3 Nf6 4. g3 b6 5. Bg2 Bb7 6. O-O a6 7. b3 Be7 8. Bb2 O-O 9. d4 cxd4 10. Nxd4 Bxg2
Manila Manila PHI 1975 – Round 3 – Mecking, Henrique – 1/2-1/2 – Ljubojevic, Ljubomir – G4 1. Nf3 Nf6 2. c4 e6 3. Nc3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O a6 7. b3 d6 8. Bb2 Be7 9. d4 cxd4 10. Nxd4 Bxg2
Milaan 1975 – Round 6 – Portisch, Lajos – 0-1 – Andersson, Ulf 1949 – G22 1. c4 Nf6 2. Nc3 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 c5 6. O-O a6 7. d4 cxd4 8. Qxd4 d6 9. b3 Nbd7 10. e4 Be7
Milaan m sf 1975 – Round 3 – Portisch, Lajos – 1-0 – Ljubojevic, Ljubomir – G4 1. Nf3 c5 2. c4 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O a6 7. Re1 d6 8. e4 Nbd7 9. d3 Be7 10. h3 O-O
Moscow 1975 – Round 1 – Korchnoi, Viktor – 1-0 – Garcia Martinez, Silvino – G53 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O a6 7. b3 d6 8. d4 cxd4 9. Qxd4 Nbd7 10. Bb2 Be7
Moscow Interzonal 1982 – Round 3 – Andersson, Ulf 1949 – 1-0 – Gheorghiu, Florin – G10 1. c4 c5 2. Nf3 Nf6 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 a6 7. b3 Be7 8. d4 cxd4 9. Qxd4 d6 10. Ba3 Nc6
World Blitz Final 2012 – Round 12 – Radjabov, Teimour – 0-1 – Carlsen, Magnus – G93 1. Nf3 c5 2. c4 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O a6 7. Re1 d6 8. e4 Be7 9. d4 cxd4 10. Nxd4 Qc7
World Cup 1988 – Round 1 – Andersson, Ulf 1949 – 0-1 – Hjartarson, Johann – G71 1. Nf3 Nf6 2. c4 b6 3. g3 Bb7 4. Bg2 c5 5. O-O e6 6. Nc3 a6 7. b3 d6 8. Bb2 Be7 9. e3 O-O 10. Qe2 Nbd7
World Cup 1988 – Round 1 – Korchnoi, Viktor – 0-1 – Hjartarson, Johann – G98 1. Nf3 Nf6 2. c4 b6 3. g3 c5 4. Bg2 Bb7 5. O-O e6 6. Nc3 a6 7. b3 d6 8. d4 cxd4 9. Nxd4 Qc7 10. Bxb7 Qxb7
World Cup 1989 – Round 1 – Karpov, Anatoly – 1-0 – Hjartarson, Johann – G87 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O a6 7. b3 d6 8. Bb2 Be7 9. d4 cxd4 10. Nxd4 Bxg2
World Cup 1991 – Round 15 – Andersson, Ulf 1949 – 1/2-1/2 – Hjartarson, Johann – G112 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O a6 7. b3 d6 8. Bb2 Be7 9. e3 O-O 10. Qe2 Nbd7
Zuerich Champions rap 2009 – Round 3 – Karpov, Anatoly – 1/2-1/2 – Topalov, Veselin – G8 1. Nf3 c5 2. c4 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O a6 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 Qc8 10. Qd3 Nc6

A30i — Symmetrical, Hedgehog (1934)

1.c4 c5 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 a6

Les coups candidats

7.d4 — 37.3% (720 parties)

Ambassadeurs : Suba, Mihai (28x), Marin, Mihail (10x), Gheorghiu, Florin (8x), Ionescu, Constantin (7x), Krallmann, Matthias (7x), Pogorelov, Ruslan (7x), Michaelsen, Nils (5x), Ljubojevic, Ljubomir (4x)

7.Re1 — 31.6% (609 parties)

Ambassadeurs : Marin, Mihail (12x), Suba, Mihai (9x), Wojtkiewicz, Aleksander (8x), Bogosavljevic, Boban (6x), Kovacevic, Slobodan (5x), Paschall, William (4x), Nyysti, Sampsa (4x), Bosboom, Manuel (4x)

7.b3 — 24.6% (474 parties)

Ambassadeurs : Suba, Mihai (17x), Kovacevic, Slobodan (9x), Andersson, Ulf (9x), Psakhis, Lev (6x), Hjartarson, Johann (6x), Wojtkiewicz, Aleksander (5x), King, Daniel J (4x), Foisor, Ovidiu-Doru (4x)

7.d3 — 2.8% (54 parties)

Ambassadeurs : Broffman, Peter (2x), Olesen, Martin (2x), Scoones, Dan (1x), Done, Stefan-Daniel (1x), Kristiansen, Jens (1x), Sorensen, Torben (1x), Lehmann, Karl-Heinz (1x), Foisor, Ovidiu-Doru (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	7.d4	7.Re1	7.b3	7.d3
<1800	30	40%	17%	17%	17%
1800-2200	449	36%	29%	20%	7%
2200-2600	1345	37%	33%	26%	1%
2600+	43	33%	30%	35%	2%

Évolution par décennie (% des parties)

Décennie	N parties	7.d4	7.Re1	7.b3	7.d3
1970s	74	39%	8%	53%	—
1980s	186	44%	13%	39%	3%
1990s	464	38%	31%	24%	3%
2000s	570	35%	37%	20%	2%
2010s	515	37%	35%	22%	4%
2020s	121	38%	33%	20%	3%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
7.d4	37%	38%	▲ +1.1%
7.Re1	35%	33%	▼ -1.9%
7.b3	22%	20%	▼ -1.7%
7.d3	4%	3%	-0.4%

Joueurs célèbres

Champions du monde dans cette position

Karpov, Anatoly — 6 parties
Tal, Mikhail — 3 parties
Kramnik, Vladimir — 3 parties
Carlsen, Magnus — 3 parties
Kasparov, Garry — 1 partie
Ju, Wenjun — 1 partie
Gukesh D — 1 partie
Ding, Liren — 1 partie

Parties historiques

7.d4 — 37.3% (720 parties)

1975 — Portisch, Lajos vs Andersson, Ulf — 0-1 — Milan ITA
1975 — Petrosian, Tigran A. vs Garcia Martinez, Silvino — 1-0 — Moscow RUS
1975 — Petrosian, Tigran A. vs Andersson, Ulf — 1/2-1/2 — Milan ITA
1976 — Manasterski, Lutoslaw vs Szumilo, Witold — 1-0 — Bydgoszcz POL
1976 — Lengyel, Levente vs Ermenkov, Evgenij — 1/2-1/2 — ?

7.Re1 — 31.6% (609 parties)

1975 — Petrosian, Tigran A. vs Balashov, Yuri — 1/2-1/2 — Erevan ch-URS
1975 — Portisch, Lajos vs Ljubojevic, Ljubomir — 1-0 — Milaan m sf
1975 — Tal, Mikhail vs Balashov, Yuri — 1/2-1/2 — Erevan ch-URS
1978 — Spassov, Liuben vs Garcia Martinez, Silvino — 1/2-1/2 — Buenos Aires olm
1978 — Meduna, Eduard vs Boensch, Uwe — 0-1 — It Halle GER

7.b3 — 24.6% (474 parties)

1975 — Mecking, Henrique vs Ljubojevic, Ljubomir — 1/2-1/2 — Manila Manila PHI
1975 — Korchnoi, Viktor vs Garcia Martinez, Silvino — 1-0 — Moscow RUS
1976 — Pfleger, Helmut, Dr. vs Karpov, Anatoly — 0-1 — Montilla Moriles
1976 — Jakobsen, Ole vs Mortensen, Erling — 1/2-1/2 — Aarhus DEN
1976 — Bisguier, Arthur B vs Berry, David — 1-0 — 06, Lone Pine

7.d3 — 2.8% (54 parties)

1988 — Broffman, Peter vs Scoones, Dan — 1/2-1/2 — Victoria CAN
1988 — Broffman, Peter vs Done, Stefan-Daniel — 1/2-1/2 — ?
1988 — Kristiansen, Jens vs Sorensen, Torben — 1-0 — Odense DEN
1988 — Lehmann, Karl-Heinz vs Foisor, Ovidiu-Doru — 0-1 — Berlijn open
1989 — Kestler, Hans-Guenther vs Werner, Marc — 1/2-1/2 — Duitsland tt

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