Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→g3, h2→g3	● d6→c5, e7→d6, f7→g6, h7→g6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● b5 (2v0), ● d5 (2v0)	● b4 (2v0), ● d4 (3v1), ● g4 (2v0), ● e5 (3v1), ● f5 (3v0)
Cases faibles	—	—
Centre	● d5 (2v0), ● e4 (1v0)	● d4 (3v1), ● e5 (3v1)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bg2	● Bg2 Ok (mob. 2)
Bg7		● Bg7 Actif (mob. 5)
Bc8		● Bc8 Non développé (mob. 5)
Paire de fous	● Oui	● Oui
Non développées	2 (● c1, ● a1)	3 (● c8, ● 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	● …d6-d5

A37h — English: Symmetrical, 5.Nf3 d6 6.O-O Nh6

1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 d6 6.O-O Nh6 * ○ Trait aux Blancs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

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Plan principal. Attaque sur le roi adverse resté au centre.

Atouts. Les Blancs s'appuient sur un contrôle dominant de b5 et d5.

Côté adverse. Le roi resté au centre.

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

Plans. a3 (Préparer expansion aile dame — 29 % des parties) ; d3 (Solidifier le centre — 28 % des parties) ; b3 (Préparer le fianchetto — 11 % des parties) ; e3 (Solidifier le centre — 11 % des parties) ; d4 (Occuper le centre — 11 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

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Plan principal. Mettre le roi à l'abri (...O-O dans 40 % des parties).

Atouts. Les Noirs s'appuient sur un contrôle dominant de b4, d4, g4, e5 et f5 et un fou actif en g7.

Côté adverse. Un mauvais fou en c1.

En contrepartie. Le roi n'est pas encore à l'abri et plusieurs pièces dorment encore (le fou c8 et les tours a8 et h8).

Plans. ...O-O (Mettre le roi en sécurité, connecter les tours — 40 % des parties) ; ...Nf5 (Cavalier actif en f5 — 35 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Partie
1955 Moskou ch-URS – Round 1 – Kotov Lundqvist, Alex – 1-0 – Korchnoi, Viktor – G3 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. g3 Nc6 5. Bg2 d6 6. O-O Nh6 7. b3 O-O 8. Bb2 f5 9. d3 e5 10. Qd2 Ng4
1956 New York Rosenwald5556 – Round ? – Evans, Larry M – 1/2-1/2 – Reshevsky, Samuel – G28 1. Nf3 c5 2. g3 g6 3. Bg2 Bg7 4. O-O Nc6 5. c4 d6 6. Nc3 Nh6 7. d3 Nf5 8. Bd2 O-O 9. a3 Rb8 10. Rb1 a5
1956 URS Ch sf Tbilisi GEO – Round 15 – Furman, Slavomir – 1/2-1/2 – Petrosian, Tigran A. – G15 1. c4 g6 2. g3 Bg7 3. Bg2 c5 4. Nc3 Nc6 5. Nf3 d6 6. O-O Nh6 7. d3 Nf5 8. Bd2 O-O 9. Rb1 Rb8 10. a3 a6
1957 Sofia zt Sofia BUL – Round 1 – Filip, Marius Liviu – 1/2-1/2 – Neikirkh, Oleg – G2 1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nf3 Nc6 5. O-O d6 6. Nc3 Nh6 7. d3 O-O 8. Bd2 Nf5 9. a3 Rb8 10. b4 cxb4
1958 BUL Ch – Round ? – Filchev, Rusko – 1-0 – Orev, Petar – G3 1. c4 g6 2. g3 Bg7 3. Bg2 c5 4. Nf3 Nc6 5. O-O d6 6. Nc3 Nh6 7. d3 Nf5 8. e3 h5 9. h3 Bd7 10. e4 Nfd4
1958 Mar del Plata – Round 13 – Larsen, Benjamin Holsko – 1-0 – Sanguinetti, Ricardo – G93 1. c4 c5 2. g3 Nc6 3. Bg2 g6 4. Nf3 Bg7 5. O-O d6 6. Nc3 Nh6 7. a3 O-O 8. Rb1 Bf5 9. d3 Qd7 10. Nd5 Rab8
1958 Portoroz Interzonal – Round 2 – Neikirkh, Oleg – 1/2-1/2 – Bronstein, David I – G19 1. Nf3 c5 2. c4 Nc6 3. Nc3 g6 4. g3 Bg7 5. Bg2 d6 6. O-O Nh6 7. a3 Nf5 8. Rb1 Bd7 9. b4 b6 10. Ne4 Nfd4
1959 Wch U20 fin-A – Round 11 – Naranja, Renato – 1/2-1/2 – Erny, Walter – G40 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 d6 6. O-O Nh6 7. d3 O-O 8. Bd2 Bd7 9. a3 Qc8 10. Qc1 Nf5
1961 Maroczy Memorial – Round 1 – Uhlmann, Wolfgang – 1/2-1/2 – Filip, Marius Liviu – G1 1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6 5. Nf3 d6 6. O-O Nh6 7. a3 O-O 8. d3 Nf5 9. Bd2 a6 10. Rb1 Rb8
1961 Moskou ZShK – Round 10 – Portisch, Lajos – 1/2-1/2 – Gufeld, Eduard – G51 1. Nf3 c5 2. g3 Nc6 3. Bg2 g6 4. c4 Bg7 5. Nc3 d6 6. O-O Nh6 7. a3 O-O 8. Rb1 Rb8 9. b4 b6 10. d3 Bxc3
1962 Asztalos Memorial 5th – Round 13 – Pirc, Vasja – 1/2-1/2 – Bilek, Istvan – G100 1. Nf3 c5 2. g3 Nc6 3. Bg2 g6 4. O-O Bg7 5. c4 d6 6. Nc3 Nh6 7. b3 Nf5 8. Bb2 O-O 9. Na4 Bxb2 10. Nxb2 Rb8
1962 Erevan ch-URS – Round 1 – Krogius, Nikolai V – 1/2-1/2 – Novopashin, Arkady – G1 1. c4 c5 2. Nc3 g6 3. g3 Bg7 4. Bg2 d6 5. Nf3 Nc6 6. O-O Nh6 7. d3 a6 8. Bd2 O-O 9. a3 Rb8 10. Ne1 Bd7
1962 URS Team Ch – Round 1 – Etruk, Rein T – 1/2-1/2 – Bannik, Anatolij – G2 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 d6 6. O-O Nh6 7. a3 Nf5 8. Rb1 Nfd4 9. Ne1 a5 10. e3 Ne6
1962 Vrnjacka Banja – Round 1 – Pirc, Vasja – 1/2-1/2 – Milic, Borislav – G18 1. Nf3 c5 2. g3 Nc6 3. Bg2 g6 4. O-O Bg7 5. c4 d6 6. Nc3 Nh6 7. b3 O-O 8. Bb2 Nf5 9. e3 Bd7 10. Na4 e5
1963 Budapest ch-HUN – Round 1 – Haag, Ervin – 0-1 – Bilek, Istvan – G7 1. c4 c5 2. g3 Nc6 3. Bg2 g6 4. Nc3 Bg7 5. Nf3 d6 6. O-O Nh6 7. b3 Nf5 8. e3 O-O 9. Bb2 Bd7 10. Qe2 a6
1967 Glasgow Open – Round 4 – Keene, Raymond D – 1/2-1/2 – Pritchett, Craig W – G8 1. Nf3 g6 2. c4 Bg7 3. g3 c5 4. Bg2 Nc6 5. Nc3 d6 6. O-O Nh6 7. Rb1 O-O 8. a3 Bg4 9. h3 Bxf3 10. Bxf3 Ne5
1968 Lugano olm - Round 1 - Miranda, Marcio Marcos do Carmo - 0-1 - Soos, Bela - G11 1. c4 c5 2. Nc3 g6 3. g3 Bg7 4. Bg2 Nc6 5. Nf3 d6 6. O-O Nh6 7. d3 Nf5 8. Bd2 O-O 9. Rb1 Rb8 10. a3 b6
1968 Varna – Round 5 – Flesch, Janos – 0-1 – Peev, Peicho – G17 1. Nf3 c5 2. c4 g6 3. g3 Bg7 4. Bg2 Nc6 5. O-O d6 6. Nc3 Nh6 7. a3 O-O 8. d3 Nf5 9. e3 a6 10. Rb1 Rb8
1972 Skopje ol (Men) fin-A – Round 2 – Jakobsen, Odinn Orn – 1/2-1/2 – Timman, Jan H – G404 1. Nf3 g6 2. c4 Bg7 3. g3 c5 4. Bg2 Nc6 5. Nc3 d6 6. O-O Nh6 7. a3 O-O 8. Rb1 b6 9. b4 Bb7 10. bxc5 dxc5
2. London Chess Classic 2010 – Round 1 – McShane, Luke J – 1-0 – Carlsen, Magnus – G1 1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6 5. Nf3 d6 6. O-O Nh6 7. d4 cxd4 8. Bxh6 Bxh6 9. Nxd4 Ne5 10. Qb3 O-O
6. World Blitz 2010 – Round 33 – Andreikin, Dmitry – 0-1 – Carlsen, Magnus – G231 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. g3 Nc6 5. Bg2 d6 6. O-O Nh6 7. a3 O-O 8. Rb1 b6 9. d3 Bb7 10. Bd2 Nf5
Candidats qf4 1977 – Round 13 – Hort, Vlastimil – 1/2-1/2 – Spassky, Boris V. – G11 1. c4 c5 2. Nf3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nc3 d6 6. O-O Nh6 7. a3 O-O 8. Rb1 Rb8 9. b4 Nf5 10. e3 Bd7
FIDE World Blitz Championship 2014 – Round 15.12 – Caruana, Fabiano – 1-0 – Iturrizaga Bonelli, Eduardo – G135 1. Nf3 c5 2. g3 g6 3. Bg2 Bg7 4. O-O Nc6 5. c4 d6 6. Nc3 Nh6 7. d3 Nf5 8. Bd2 O-O 9. Rb1 Qd7 10. a3 b6
Spassky - Hort Candidates Quarterfinal 1977 – Round 13 – Hort, Vlastimil – 1/2-1/2 – Spassky, Boris V. – G2 1. c4 c5 2. Nf3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nc3 d6 6. O-O Nh6 7. a3 O-O 8. Rb1 Rb8 9. b4 Nf5 10. e3 Bd7
World Blitz 2015 – Round 18.45 – Meier, Georg – 1/2-1/2 – Khismatullin, Denis – G1132 1. Nf3 c5 2. g3 g6 3. c4 Bg7 4. Nc3 Nc6 5. Bg2 d6 6. O-O Nh6 7. b3 Nf5 8. Bb2 O-O 9. e3 Rb8 10. Qc1 a6

A37h — Symmetrical (1955)

1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 d6 6.O-O Nh6

Les coups candidats

7.d3 — 30.2% (180 parties)

Ambassadeurs : Ebner, Hubert (3x), Petrov, Georgi (3x), Rapaka Samuel Paul (2x), Pils, Walter (2x), Meszaros, Michal (2x), Maryasin, Boris (2x), Evans, Larry (1x), Naranja, Renato (1x)

7.d4 — 25.5% (152 parties)

Ambassadeurs : Ben Artzi, Ido (5x), Loginov, Valery A (2x), Andersson, Ulf (2x), Carvalho, Guillermo (2x), Onur, Cem (2x), Anay Barche (1x), Damjanovic, Mato (1x), Feustel, Bernd (1x)

7.a3 — 19.3% (115 parties)

Ambassadeurs : Enchev, Ivajlo (2x), Etruk, Rein T (1x), Bannik, Anatolij (1x), Uhlmann, Wolfgang (1x), Filip, Miroslav (1x), Portisch, Lajos (1x), Gufeld, Eduard (1x), Neikirkh, Oleg (1x)

7.b3 — 9.2% (55 parties)

Ambassadeurs : Pirc, Vasja (2x), Bak, Istvan (2x), Milic, Borislav (1x), Haag, Ervin (1x), Kotov, Alexander (1x), Korchnoi, Viktor (1x), Chernin, Alexander (1x), Olafsson, Helgi (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	7.d3	7.d4	7.a3	7.b3
<1800	9	44%	11%	44%	—
1800-2200	153	29%	23%	16%	7%
2200-2600	374	30%	29%	20%	9%
2600+	14	14%	36%	14%	29%

Évolution par décennie (% des parties)

Décennie	N parties	7.d3	7.d4	7.a3	7.b3
1950s	10	70%	—	20%	10%
1960s	14	36%	—	29%	21%
1970s	14	21%	14%	36%	14%
1980s	25	20%	8%	32%	8%
1990s	92	29%	18%	20%	12%
2000s	101	51%	14%	17%	4%
2010s	288	23%	35%	19%	8%
2020s	53	26%	28%	11%	19%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
7.d3	23%	26%	▲ +3.2%
7.d4	35%	28%	▼ -7.1%
7.a3	19%	11%	▼ -7.8%
7.b3	8%	19%	▲ +11.2%

Joueurs célèbres

Champions du monde dans cette position

Carlsen, Magnus — 4 parties
Botvinnik, Mikhail — 1 partie
Hou, Yifan — 1 partie
Gukesh D — 1 partie

Parties historiques

7.d3 — 30.2% (180 parties)

1956 — Evans, Larry vs Rapaka Samuel Paul — 1/2-1/2 — New York, NY USA
1956 — Furman, Semyon vs Petrosian, Tigran V. — 1/2-1/2 — URS-ch sf Tbilisi GEO
1957 — Filip, Miroslav vs Neikirkh, Oleg — 1/2-1/2 — Sofia zt Sofia BUL
1957 — Rapaka Samuel Paul vs Byrne, David — 1-0 — New York, NY USA
1958 — Filchev, Rusko vs Orev, Petar — 1-0 — Sofia BUL

7.d4 — 25.5% (152 parties)

1972 — Anay Barche vs Damjanovic, Mato — 1/2-1/2 — Zagreb CRO
1975 — Feustel, Bernd vs Tauber, Manfred — 1/2-1/2 — Coburg
1983 — Andersson, Ulf vs Van der Wiel, John T.H. — 1-0 — Wijk aan Zee NED
1985 — Haritakis, Theodoros vs Bousios, Hristos — 1-0 — ?
1990 — Mueller, Norbert vs Simonov, Viktor — 0-1 — Moscow op Moscow RUS

7.a3 — 19.3% (115 parties)

1958 — Neikirkh, Oleg vs Bronstein, David I — 1/2-1/2 — Portoroz SLO
1958 — Larsen, Benjamin Holsko vs Sanguinetti, Ricardo — 1-0 — Mar del Plata ARG
1961 — Uhlmann, Wolfgang vs Filip, Miroslav — 1/2-1/2 — Budapest HUN
1961 — Portisch, Lajos vs Gufeld, Eduard — 1/2-1/2 — Moskou ZShK
1962 — Etruk, Rein T vs Bannik, Anatolij — 1/2-1/2 — Leningrad RUS

7.b3 — 9.2% (55 parties)

1955 — Kotov, Alexander vs Korchnoi, Viktor — 1-0 — Moskou ch-URS
1962 — Pirc, Vasja vs Bak, Istvan — 1/2-1/2 — Kecskemet HUN
1962 — Pirc, Vasja vs Milic, Borislav — 1/2-1/2 — Vrnjacka Banja SRB
1963 — Haag, Ervin vs Bak, Istvan — 0-1 — Budapest ch-HUN
1970 — ABDELMUNEM SAAD vs Garces, Napoleon — 1/2-1/2 — Cordoba ARG

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