Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→g3, h2→g3	● d7→e6, f7→e6
Passés	—	—
Majorité	● aile dame 3v2	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● f4 (2v0), ● b5 (3v0)	● b4 (2v0), ● d4 (2v1)
Cases faibles	—	—
Centre	—	● d4 (2v1), ● e5 (1v0)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● d	● c

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bf1	● Bf1 Non développé (mob. 2)
Bc5		● Bc5 Actif (mob. 7)
Bc8		● Bc8 Non développé (mob. 0)
Paire de fous	● Oui	● Oui
Non développées	4 (● c1, ● f1, ● a1, ● h1)	3 (● c8, ● a8, ● h8)

Sécurité du roi

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

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	mobile
Ruptures	—	● …d7-d5

A33n — English: Symmetrical, Two Knights, 5.Nc3 Nc6 6.g3 Bc5

1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Nc6 6.g3 Bc5 * ○ Trait aux Blancs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plans. Nb3 (88 % des parties) ; e3 (Libérer Bf1, préparer Bd3 — 5 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plans. ...Bb4 (Clouer c3, Fou actif (mobilité 7) — 46 % des parties) ; ...Be7 (Fou actif (mobilité 5) — 39 % des parties) ; ...O-O (Mettre le roi en sécurité, connecter les tours — 6 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Partie
11. Tal Mem Rapid 2018 – Round 7.4 – Gelfand, Boris – 1/2-1/2 – Mamedyarov, Shakhriyar – G34 1. Nf3 c5 2. c4 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3 Bc5 7. Nb3 Be7 8. Bg2 O-O 9. Bf4 b6 10. O-O Ba6
1954 New York – Round 4 – Bisguier, Arthur B – 1-0 – Petrosian, Tigran A. – G15 1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 Nc6 5. Nc3 e6 6. g3 Bc5 7. Nb3 Be7 8. Bg2 O-O 9. O-O d6 10. e4 Ne5
1967 Palma de Majorca ESP – Round 2 – Smyslov, Vladimir – 1-0 – Matulovic, Milan – G2 1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 Nc6 5. Nc3 e6 6. g3 Bc5 7. Nb3 Be7 8. Bg2 O-O 9. O-O d6 10. Bf4 Nh5
1968 Hoogovens – Round 7 – Tal, Mikhail – 1/2-1/2 – Ivkov, Borislav – G64 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Bc5 7. Nb3 Be7 8. Bg2 O-O 9. O-O d6 10. Nd4 Bd7
1968 Palma de Mallorca – Round 9 – Korchnoi, Viktor – 1/2-1/2 – Ivkov, Borislav – G78 1. c4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3 Bc5 7. Nb3 Be7 8. Bg2 O-O 9. O-O d6 10. Nd4 Bd7
1969 Buesum – Round 11 – Ivkov, Borislav – 1/2-1/2 – Gligorić, Svetozar – G29 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Bc5 7. Nb3 Bb4 8. Bg2 d5 9. O-O dxc4 10. Nd2 Qd4 1/2-1/2
1970 Palma de Mallorca Interzonal – Round 16 – Portisch, Lajos – 1-0 – Gligoric, Svetozar – G9 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Bc5 7. Nb3 Bb4 8. Bg2 d5 9. cxd5 Nxd5 10. a3 Bxc3+
1975 Milan – Round 9 – Browne, Walter Shawn – 1/2-1/2 – Ljubojevic, Ljubomir – G5 1. c4 Nf6 2. Nc3 c5 3. Nf3 e6 4. d4 cxd4 5. Nxd4 Nc6 6. g3 Bc5 7. e3 O-O 8. Bg2 d5 9. cxd5 exd5 10. O-O Bg4
20. European Teams 2015 – Round 5.5 – Howell, David W L – 1/2-1/2 – Meier, Georg – G220 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Bc5 7. Nb3 Be7 8. Bg2 O-O 9. O-O b6 10. Bf4 Bb7
Breda m 1979 – Round 5 – Timman, Jan H – 1/2-1/2 – Polugaevsky, Lev – G5 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Bc5 7. Nb3 Bb4 8. Bg2 d5 9. O-O dxc4 10. Nd2 O-O
Candidates final 1977 – Round 1 – Korchnoi, Viktor – 1/2-1/2 – Spassky, Boris V. – G1 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Bc5 7. Nb3 Bb4 8. Bg2 d5 9. cxd5 Nxd5 10. a3 Bxc3+
Cap d'Agde 1994 – Round 1 – Lautier, Joel – 1-0 – Leko, Peter – G1 1. c4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3 Bc5 7. Nb3 Bb4 8. Bg2 d5 9. cxd5 Nxd5 10. O-O Nxc3
Rio de Janeiro Interzonal 1979 – Round 13 – Huebner, Robert – 1/2-1/2 – Timman, Jan H – G40 1. Nf3 c5 2. c4 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Bc5 7. Nb3 Bb4 8. Bg2 d5 9. O-O dxc4 10. Nd2 O-O
Superbet Chess Classic Romania 2025 – Round 7 – Praggnanandhaa R – 1/2-1/2 – Firouzja Alireza – G31 1. c4 c5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 cxd4 5. Nxd4 e6 6. g3 Bc5 7. Nb3 Bb4 8. Bg2 d5 9. cxd5 exd5 10. O-O Bxc3
World Blitz 2015 – Round 13.27 – Adhiban, B. – 1-0 – Bacrot, Etienne – G800 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. Nc3 cxd4 5. Nxd4 Nc6 6. g3 Bc5 7. Nb3 Be7 8. Bg2 O-O 9. O-O d6 10. Bf4 a6

A33n — Symmetrical, Two Knights (1954)

1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Nc6 6.g3 Bc5

Les coups candidats

7.Nb3 — 87.6% (418 parties)

Ambassadeurs : Hulak, Krunoslav (10x), Parma, Bruno (9x), Sosonko, Gennadi (7x), Polugaevsky, Lev (6x), Korchnoi, Viktor (5x), Smejkal, Jan (5x), Ivkov, Borislav (5x), Langeweg, Kick (4x)

7.e3 — 5.0% (24 parties)

Ambassadeurs : Kolbak, Jens (1x), Dinsen, Carl Krarup (1x), Berg, Klaus (1x), Hansen, Curt (1x), Zieher, Uwe (1x), Lindemann, Stefan (1x), Browne, Walter Shawn (1x), Ljubojevic, Ljubomir (1x)

7.Nxc6 — 2.5% (12 parties)

Ambassadeurs : Byrne, Brendan (1x), Dowling, Jamie (1x), Nei, Mati (1x), Haapasalo, Jukka-Pekka (1x), Luksza, Arkadiusz (1x), Bolduc, Steve (1x), Margolin, Dmitrij (1x), Abalian, Evgenia (1x)

7.Nc2 — 1.9% (9 parties)

Ambassadeurs : Marschner, Juergen (1x), Wegner, Hannu (1x), Egeli, Per Ove (1x), Dahl, Ingrid (1x), Lubczynski, Rafal (1x), Gritsak, Orest (1x), Soysal, Serkan (1x), Firat, Burak (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	7.Nb3	7.e3	7.Nxc6	7.Nc2
<1800	21	67%	10%	5%	10%
1800-2200	108	81%	6%	6%	4%
2200-2600	250	92%	3%	1%	1%
2600+	25	96%	4%	—	—

Évolution par décennie (% des parties)

Décennie	N parties	7.Nb3	7.e3	7.Nxc6	7.Nc2
1950s	3	100%	—	—	—
1960s	6	83%	17%	—	—
1970s	55	98%	2%	—	—
1980s	85	92%	6%	—	1%
1990s	79	86%	8%	3%	1%
2000s	95	83%	7%	4%	—
2010s	110	88%	3%	3%	5%
2020s	44	77%	2%	7%	5%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
7.Nb3	88%	77%	▼ -10.9%
7.e3	3%	2%	-0.5%
7.Nxc6	3%	7%	▲ +4.1%
7.Nc2	5%	5%	+0.0%

Joueurs célèbres

Champions du monde dans cette position

Hou, Yifan — 3 parties
Tal, Mikhail — 2 parties
Kasparov, Garry — 1 partie

Parties historiques

7.Nb3 — 87.6% (418 parties)

1953 — Furman, Semyon vs Nezhmetdinov, Rashid — 1-0 — Leningrad RUS
1954 — Bisguier, Arthur B vs Petrosian, Tigran V. — 1-0 — New York, NY USA
1955 — Furman, Semyon vs Petrosian, Tigran V. — 1/2-1/2 — Moskou ch-URS
1967 — Smyslov, Vasily vs Matulovic, Milan — 1-0 — Palma de Majorca ESP
1968 — Czerniak, Moshe vs Tringov, Georgi P — 0-1 — Athens GRE

7.e3 — 5.0% (24 parties)

1963 — Kolbak, Jens vs Dinsen, Carl Krarup — 1/2-1/2 — ?
1975 — Browne, Walter Shawn vs Ljubojevic, Ljubomir — 1/2-1/2 — Milan ITA
1980 — Smejkal, Jan vs Langeweg, Kick — 1/2-1/2 — Amsterdam NED
1981 — Berg, Klaus vs Hansen, Curt — 1/2-1/2 — Copenhagen DEN
1981 — Zieher, Uwe vs Lindemann, Stefan — 1/2-1/2 — RLN 8081

7.Nxc6 — 2.5% (12 parties)

1991 — Nei, Mati vs Haapasalo, Jukka-Pekka — 1/2-1/2 — Thessaloniki GRE
1998 — Byrne, Brendan vs Dowling, Jamie — 1-0 — Ireland
2002 — Margolin, Dmitrij vs Abalian, Evgenia — 1-0 — St Petersburg RUS
2003 — Luksza, Arkadiusz vs Bolduc, Steve — 0-1 — Laval CAN
2006 — Fadin, Evgeny vs Polyansky, Viktor — 1/2-1/2 — Voronezh RUS

7.Nc2 — 1.9% (9 parties)

1986 — Marschner, Juergen vs Wegner, Hannu — 0-1 — Duitsland tt
1992 — Egeli, Per Ove vs Dahl, Ingrid — 0-1 — Arnold Cup Gausdal NOR
2011 — Blagojevic, Marijan vs Curic, Drazen — 0-1 — Zagreb CRO
2012 — Jantz, Heiko vs Friedrich, Johannes — 1-0 — Troisdorf
2013 — Lubczynski, Rafal vs Gritsak, Orest — 1/2-1/2 — Legnica POL

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