A30q — English: Symmetrical, Hedgehog, 7.d4

1.c4 c5 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.d4 * ● Trait aux Noirs

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 les cases fortes f4, b5, e5 et g5 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. Bg5 (Clouer Nf6) ; 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. 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	● f2→g3, h2→g3	● b6→c5, a7→b6, d7→e6, f7→e6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● f4 (2v0), ● b5 (2v0), ● e5 (2v0), ● g5 (2v0)	● e4 (2v1)
Cases faibles	—	—
Centre	● d4 (2v1), ● e5 (2v0)	● d5 (3v2), ● e4 (2v1)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
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	● d4-d5, ● e2-e3	● …d7-d6, ● …d7-d5, ● …e6-e5

Partie
1930 Hamburg olm – Round 1 – Takacs, Sandor – 1/2-1/2 – Sultan Khan, Mir – G3 1. c4 Nf6 2. Nf3 c5 3. Nc3 b6 4. g3 Bb7 5. Bg2 e6 6. O-O Be7 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 a6 10. b3 Qc7
1931 Prague ol Prague CZE – Round 13 – Kashdan, Isaac – 1/2-1/2 – Rosselli del Turco, Stefano – G43 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. O-O c5 6. Nc3 Be7 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 O-O 10. b3 Nc6
1935 Moscow – Round 6 – Menchik, Vera Frantsevna – 0-1 – Lisitsin, Georgy – G32 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. O-O c5 6. Nc3 Be7 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 Qc8 10. Qd3 O-O
1937 Copenhagen – Round 5 – Lundin, Erik – 1/2-1/2 – Andersen, Erik – G12 1. Nf3 Nf6 2. c4 c5 3. Nc3 b6 4. g3 Bb7 5. Bg2 e6 6. O-O Be7 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 a6 10. e4 Qc7
1944 Mar del Plata – Round 11 – Stahlberg, Gideon – 1/2-1/2 – Pilnik, Herman – G91 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. O-O Be7 6. Nc3 c5 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 Qc8 10. Qd3 Nc6
1946 Nottingham ch-BCF – Round 1 – Golombek, Harry – 1/2-1/2 – Combe, Robert F – G2 1. c4 Nf6 2. Nc3 e6 3. g3 c5 4. Nf3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Nb5 O-O 9. Nbxd4 Qc8 10. b3 d5
1949 URS Ch, semi final – Round 12 – Chekhover, Vitaly – 1/2-1/2 – Rovner, Dmitry – G87 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 Qc8 10. Qd3 Nc6
1950 Moskou ch-URS – Round 1 – Flohr, Salo – 0-1 – Keres, Paul – G111 1. Nf3 c5 2. c4 Nf6 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. d4 Ne4 8. Qc2 Nxc3 9. Qxc3 Bf6 10. Be3 Nc6
1950 Schiavno Zdroj – Round 1 – Gawlikowski, Stanislaw – 0-1 – Keres, Paul – G9 1. c4 e6 2. Nc3 c5 3. Nf3 Nf6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 Ne4 8. Nxe4 Bxe4 9. Ne5 Bxg2 10. Kxg2 Bf6
1952 Moskou ch-URS – Round ? – Bronstein, David I – 1-0 – Byvshev, Vasily – G173 1. Nf3 Nf6 2. c4 e6 3. Nc3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 d6 8. d5 e5 9. e4 Bc8 10. a3 O-O
1953 Candidats Tournament – Round 24 – Bronstein, David I – 1/2-1/2 – Kotov Lundqvist, Alex – G155 1. c4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 c5 5. O-O e6 6. Nc3 Be7 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 Qc8 10. Qd3 Nc6
1953 ITA-ch16 – Round 5 – Szabados, Eugenio – 0-1 – Cibolini, Italo – G13 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. O-O Be7 6. Nc3 c5 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 O-O 10. e4 d6
1955 Budapest – Round 1 – Hacsak, Istvan – 1/2-1/2 – Barczay, Laszlo – G86 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Nc3 Bb7 5. Bg2 c5 6. O-O Be7 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 Qc8 10. Qa4 Na6
1955 CSR Ch – Round 6 – Pithart, Frantisek – 1/2-1/2 – Vesely, Jiri – G49 1. Nf3 Nf6 2. c4 c5 3. g3 b6 4. Bg2 Bb7 5. Nc3 e6 6. O-O Be7 7. d4 cxd4 8. Nb5 O-O 9. Nbxd4 d5 10. cxd5 Bxd5
1955 Erfurt – Round 1 – Alster D – 1/2-1/2 – Fichtl, Jiri – G1 1. c4 c5 2. Nc3 Nf6 3. g3 e6 4. Nf3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 O-O 10. e4 Nc6
1955 Hoechst ch-GER – Round 1 – Wolk, Sigmund – 0-1 – Hantke, R. – G8 1. c4 Nf6 2. Nc3 c5 3. g3 e6 4. Nf3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 a6 10. e4 Qc7
1956 Copenhagen – Round 5 – Nielsen, Axel – 1/2-1/2 – Bouwmeester, Hans – G28 1. c4 e6 2. Nf3 Nf6 3. g3 b6 4. Bg2 Bb7 5. O-O c5 6. Nc3 Be7 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 Qc8 10. Qd3 Nc6
1956 Hastings5657 – Round 2 – Larsen, Benjamin Holsko – 0-1 – Olafsson, Fridrik – G10 1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. c4 e6 5. O-O c5 6. Nc3 Be7 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 Qc8 10. Bf4 O-O
1956 Moscow olm fin-A – Round 10 – Szabo, Ladislav – 1/2-1/2 – Larsen, Benjamin Holsko – G159 1. c4 e6 2. Nc3 Nf6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 Qc8 10. Qd3 Nc6
1957 FRG Ch 04th – Round 3 – Wolk, Sigmund – 1-0 – Eisinger Max – G2 1. c4 Nf6 2. Nc3 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 c5 6. O-O Be7 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 O-O 10. e4 Nc6
1957 FRG Ch Bad Neuenahr – Round 3 – Wolk, Sigmund – 1-0 – Eisinger, Max Jr – G7 1. c4 Nf6 2. Nc3 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 c5 6. O-O Be7 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 O-O 10. e4 Nc6
1957 WchT U26 04th – Round 1.4 – Spalk, Bjarne – 1/2-1/2 – Szabo, Iuliu inactive – G12 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O c5 7. Nc3 cxd4 8. Nxd4 Bxg2 9. Kxg2 Qc8 10. Bf4 Nh5
1958 ITA-SUI m – Round 2 – Castaldi, Vincenzo – 0-1 – Nievergelt, Erwin – G9 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 O-O 10. e4 Qc7
1958 Munich olm prel – Round 6 – Kramer, Haije – 1/2-1/2 – Noradounghian, Georges – G44 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 O-O 10. e4 Nc6
1961 Palanga Baltic Ch – Round ? – Nei, Iivo – 1/2-1/2 – Ludolph, Jaan – G7 1. c4 Nf6 2. Nf3 e6 3. Nc3 b6 4. g3 Bb7 5. Bg2 c5 6. O-O Be7 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 Qc8 10. Qd3 Nc6
1965 Hungary – Round 1 – Kluger, Gyula – 1/2-1/2 – Lengyel, Laszlo – G7 1. c4 Nf6 2. Nf3 e6 3. g3 b6 4. Bg2 Bb7 5. O-O Be7 6. Nc3 c5 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 Qc8 10. Qa4 O-O
1966 La Habana olm fin-A – Round 1 – Hort, Vlastimil – 0-1 – Tal, Mikhail – G21 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 Qc8 10. Qd3 Nc6
1967 EU Team Ch preliminary – Round 5 – Filip, Miroslav – 1/2-1/2 – Lengyel, Levente – G23 1. c4 Nf6 2. Nf3 e6 3. Nc3 b6 4. g3 Bb7 5. Bg2 c5 6. O-O Be7 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 Qc8 10. Qd3 Nc6
1967 URS-ch35 – Round 1 – Nei, Iivo – 0-1 – Gurgenidze, Bukhuti – G5 1. c4 c5 2. Nf3 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 Qc8 10. Qd3 Nc6
1969 Zagreb – Round 11 – Udovcic, Mijo – 1-0 – Kovacevic, Veljko – G79 1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. O-O c5 5. c4 e6 6. Nc3 Be7 7. d4 Ne4 8. d5 Nxc3 9. bxc3 Bf6 10. e4 Bxc3
1974 Manila – Round 11 – Gheorghiu, Florin – 1-0 – Cardoso, Radolfo Tan – G59 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 c5 6. O-O Be7 7. Nc3 d5 8. cxd5 exd5 9. Ne5 O-O 10. Bf4 Na6
43. Olympiad 2018 – Round 7.4 – L'Ami, Erwin – 1/2-1/2 – Meier, Georg – G473 1. c4 Nf6 2. Nc3 c5 3. Nf3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 Qc8 10. Qd3 Nc6
FIDE GP 2010 – Round 9 – Ivanchuk, Vasyl – 1/2-1/2 – Jakovenko, Dmitry – G52 1. c4 Nf6 2. Nc3 c5 3. Nf3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Nxd4 Bxg2 9. Kxg2 Qc8 10. Qd3 Nc6
World Cup 1989 – Round 1 – Timman, Jan H – 1/2-1/2 – Ljubojevic, Ljubomir – G86 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 Ne4 8. Nxe4 Bxe4 9. Bf4 O-O 10. Qd2 d5

A30q — Symmetrical Hedgehog

1.c4 c5 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.d4

Eval: [+0.28]

Les coups candidats

7…cxd4 — 94.4% (6962 parties)

Ambassadeurs : Ftacnik, Lubomir (70x), Browne, Walter Shawn (37x), Andersson, Ulf (36x), Ribli, Zoltan (34x), Yermolinsky, Alex (28x), Espig, Lutz (24x), Portisch, Lajos (22x), Greenfeld, Alon (21x)

7…O-O — 2.3% (167 parties) →

Ambassadeurs : Ljubojevic, Ljubomir (2x), Vul, Arkadi Eremeevich (2x), Walter, Max (1x), Wolf Heinrich (1x), Acevedo Soto, Alejandra (1x), Opsahl, Haakon (1x), Botvinnik, Mikhail (1x), Kubbel, Arvid Ivanovich K (1x)

7…Ne4 — 1.4% (102 parties)

Ambassadeurs : Chiku-Ratte, Olivier-Kenta (6x), Bischoff, Klaus (5x), Sunye Neto, Jaime (3x), Keres, Paul (2x), Huebner, Robert (2x), Zilber, Israel (2x), Lau, Ralf (2x), Makarichev, Sergey (2x)

7…d6 — 1.0% (71 parties)

Ambassadeurs : Menchik, Vera (1x), Richter, Emil (1x), Bronstein, David I (1x), Byvshev, Vasily (1x), Wiedenkeller, Michael (1x), Knudsen, Per (1x), Mustelin, Juhani (1x), Laine, Heikki (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	7…cxd4	7…O-O	7…Ne4	7…d6
<1800	84	82%	13%	—	2%
1800-2200	1748	91%	4%	2%	2%
2200-2600	4389	97%	1%	1%	1%
2600+	227	99%	—	1%	—

Évolution par décennie (% des parties)

Décennie	N parties	7…cxd4	7…O-O	7…Ne4	7…d6
1920s	3	67%	33%	—	—
1930s	10	70%	20%	—	10%
1940s	5	100%	—	—	—
1950s	61	89%	7%	3%	2%
1960s	71	96%	1%	3%	—
1970s	289	90%	3%	3%	—
1980s	927	96%	1%	2%	0%
1990s	1050	95%	2%	1%	1%
2000s	1870	95%	2%	0%	1%
2010s	2625	93%	3%	2%	1%
2020s	467	97%	1%	1%	0%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
7…cxd4	93%	97%	▲ +3.7%
7…O-O	3%	1%	▼ -1.9%
7…Ne4	2%	1%	▼ -0.6%
7…d6	1%	0%	▼ -0.7%

Joueurs célèbres

Champions du monde dans cette position

Smyslov, Vladimir — 10 parties
Tal, Mikhail — 10 parties
Karpov, Anatoly — 10 parties
Kramnik, Vladimir — 10 parties
Karpov, Aleksandr — 9 parties
Kasparov, Garry — 6 parties
Carlsen, Magnus — 6 parties
Anand, Viswanathan — 3 parties
Botvinnik, Mikhail — 2 parties
Euwe, Max — 1 partie
Hou, Yifan — 1 partie
Ju, Wenjun — 1 partie

Parties historiques

7…cxd4 — 94.4% (6962 parties)

1927 — Nogues Acuna, Alejandro vs Louviau, Arsene — 1-0 — London ENG
1928 — Van Hoorn, Peter vs Colle, Edgar — 1/2-1/2 — Amsterdam NED
1930 — Takacs, Sandor vs Sultan Khan, Mir — 1/2-1/2 — Hamburg olm
1931 — Kashdan, Isaac vs Rosselli del Turco, Stefano — 1/2-1/2 — Prague ol Prague CZE
1932 — Gomez Masia vs Iliesco — 1/2-1/2 — Buenos Aires ARG

7…O-O — 2.3% (167 parties)

1923 — Walter, Max vs Wolf Heinrich — 0-1 — Maehrisch Ostrau
1931 — Botvinnik, Mikhail vs Kubbel, Arvid Ivanovich K — 1-0 — Leningrad RUS
1939 — Acevedo Soto, Alejandra vs Opsahl, Haakon — 0-1 — Buenos Aires ARG
1950 — Soluch, Leopold vs Kopetzky, Karl — 0-1 — Vienna AUT
1958 — Flatau, Leo vs Kochan, Arkadiusz — 0-1 — Detmold

7…Ne4 — 1.4% (102 parties)

1950 — Gawlikowski, Stanislaw vs Keres, Paul — 0-1 — Schiavno Zdroj
1950 — Flohr, Salo vs Keres, Paul — 0-1 — Moskou ch-URS
1968 — Fricker, Jean vs Conan, Claude — 0-1 — Charbonnieres
1969 — Udovcic, Mijo vs Kovacevic, Veljko — 1-0 — Zagreb CRO
1971 — Kent, Jeffrey vs Eisen, David J — 0-1 — Ventura ch USA

7…d6 — 1.0% (71 parties)

1933 — Menchik, Vera vs Richter, Emil — 1-0 — Mnichovo Hradiste
1952 — Bronstein, David I vs Byvshev, Vasily — 1-0 — Moskou ch-URS
1985 — Piarnpuu, Leili vs Epstein, Esther — 1-0 — Vitebsk
1986 — Wiedenkeller, Michael vs Knudsen, Per — 1-0 — Copenhagen DEN
1988 — Rodgaard, John vs Haces, Ricardo Daniel — 1-0 — Thessaloniki GRE

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