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)	—
Cases faibles	—	—
Centre	—	● 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)
Bb4		● Bb4 Actif (mob. 7)
Bc8		● Bc8 Non développé (mob. 0)
Paire de fous	● Oui	● Oui
Clouages	● knight c3	—
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

A33m — English: Symmetrical, Two Knights, 5.Nc3 Nc6 6.g3 Bb4

1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Nc6 6.g3 Bb4 * ○ Trait aux Blancs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plans. Bg2 (Fianchetto, fou sur la grande diagonale — 90 % des parties) ; Nb5 (5 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plans. ...O-O (Mettre le roi en sécurité, connecter les tours — 52 % des parties) ; ...Qa5 (Contrôle diagonale a5-e1, Prépare O-O-O — 11 % des parties) ; ...d5 (Occuper le centre — 11 % des parties) ; ...Qb6 (Prépare O-O-O — 11 % des parties) ; ...Bxc3+ (Fou actif (mobilité 6) — 5 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Partie
1927 DSB-25.Kongress – Round 6 – Saemisch, Friedrich – 1/2-1/2 – Schoenmann, Wilhelm – G28 1. Nf3 Nf6 2. c4 e6 3. Nc3 c5 4. d4 cxd4 5. Nxd4 Nc6 6. g3 Bb4 7. Bg2 Qa5 8. O-O Bxc3 9. bxc3 O-O 10. Qb3 d5
1932 Budapest – Round 1 – Lilienthal, Andor – 1/2-1/2 – Orvenyi, B. – G52 1. Nf3 Nf6 2. d4 e6 3. c4 c5 4. Nc3 cxd4 5. Nxd4 Nc6 6. g3 Bb4 7. Bg2 d5 8. O-O Bxc3 9. bxc3 Nxd4 10. cxd4 O-O
1955 Ljubljana – Round 1 – Stahlberg, Gideon – 1-0 – Persitz, Raaphi – G10 1. Nf3 Nf6 2. c4 c5 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Bb4 7. Bg2 Qa5 8. O-O Bxc3 9. bxc3 O-O 10. Qb3 d5
1955 Ljubljana – Round 6 – Persitz, Raaphi – 0-1 – Vidmar, Milan Jr – G45 1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 e6 5. Nc3 Nc6 6. g3 Bb4 7. Bg2 O-O 8. O-O d5 9. cxd5 exd5 10. Bg5 Be6
1965 Tallinn ch-URS – Round 1 – Taimanov, Mark E – 1-0 – Sakharov, Yuri G. – G5 1. c4 c5 2. Nc3 Nc6 3. Nf3 Nf6 4. d4 cxd4 5. Nxd4 e6 6. g3 Bb4 7. Bg2 O-O 8. O-O Bxc3 9. bxc3 Qa5 10. Qb3 d5
1966 Rio Hondo zt – Round 13 – Emma, Jaime – 0-1 – Aguilera Rocha, Angelina – G75 1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 Nc6 5. Nc3 e6 6. g3 Bb4 7. Bg2 O-O 8. O-O Na5 9. Qa4 Bxc3 10. bxc3 d5
1966 Santa Monica – Round 16 – Portisch, Lajos – 1-0 – Donner, Jan-Hein – G65 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Bb4 7. Bg2 O-O 8. O-O d5 9. cxd5 exd5 10. Be3 Re8
1967 Halle zt – Round 4 – Portisch, Lajos – 1-0 – Matulovic, Milan – G16 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Bb4 7. Bg2 O-O 8. O-O a6 9. Nc2 Bxc3 10. bxc3 d5
1968 Hungary – Round 1 – Bilek, Istvan – 1/2-1/2 – Forintos, Gyozo V – G6 1. c4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3 Bb4 7. Bg2 O-O 8. O-O Qe7 9. Nc2 Bc5 10. Na4 d6
World Blitz 2007 – Round 26 – Ivanchuk, Vasyl – 1-0 – Ponomariov, Ruslan – G256 1. Nf3 c5 2. c4 Nc6 3. d4 cxd4 4. Nxd4 e6 5. g3 Bb4+ 6. Nc3 Nf6 7. Bg2 O-O 8. O-O Ne5 9. Qb3 Be7 10. Rd1 a6
World Blitz 2017 – Round 11.44 – Ganguly, Surya Shekhar – 0-1 – Safarli, Eltaj – G588 1. c4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3 Bb4 7. Bg2 O-O 8. O-O h6 9. Nc2 Bxc3 10. bxc3 d5

A33m — Symmetrical, Two Knights (1927)

1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Nc6 6.g3 Bb4

Les coups candidats

7.Bg2 — 89.9% (390 parties)

Ambassadeurs : Persitz, Raaphi (2x), Portisch, Lajos (2x), Maric, Alisa (2x), Dickerson, Perry (2x), Toshkov, Tihomir (2x), Bousios, Hristos (2x), Donner, Jan-Hein (2x), Psakhis, Lev (2x)

7.Nb5 — 5.1% (22 parties)

Ambassadeurs : Stoyko, Stephen E (1x), Sprague, Ross Frederick (1x), Jacovides, Michael (1x), Hadjiyiannis, Costas (1x), Iordache, Traian (1x), Marinescu, Emilian (1x), Campbell, Gordon (1x), Fortin, Jean (1x)

7.Nxc6 — 3.0% (13 parties)

Ambassadeurs : Luef, Guenter (1x), Glaser, Herbert (1x), Thimm, Harold (1x), Brady, Fearghal (1x), Gonzalez Valdes, Jose Luis (1x), Plaza, G (1x), Psion (1x), Rex Chess (1x)

7.Nb3 — 0.7% (3 parties)

Ambassadeurs : Richardson, John R (1x), Kopec, Danny (1x), Alves, Luiz Henrique De Araujo (1x), Pelikian, Jefferson (1x), Bodiroga, Predrag (1x), Samu, Sorin-Mihai (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	7.Bg2	7.Nb5	7.Nxc6	7.Nb3
<1800	15	87%	7%	7%	—
1800-2200	131	85%	11%	2%	—
2200-2600	195	96%	1%	1%	2%
2600+	4	100%	—	—	—

Évolution par décennie (% des parties)

Décennie	N parties	7.Bg2	7.Nb5	7.Nxc6	7.Nb3
1950s	6	100%	—	—	—
1960s	10	80%	10%	—	—
1970s	33	100%	—	—	—
1980s	62	97%	2%	—	—
1990s	89	83%	7%	9%	1%
2000s	104	89%	6%	3%	1%
2010s	102	89%	5%	2%	1%
2020s	28	89%	11%	—	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
7.Bg2	89%	89%	+0.1%
7.Nb5	5%	11%	▲ +5.8%
7.Nxc6	2%	0%	▼ -2.0%
7.Nb3	1%	0%	▼ -1.0%

Joueurs célèbres

Champions du monde dans cette position

Kasparov, Garry — 2 parties

Parties historiques

7.Bg2 — 89.9% (390 parties)

1952 — Pachman, Ludek vs Kubelka, Jaroslav — 0-1 — sim Prague
1952 — Panno, Oscar vs Amaro, Lucas Ibrair — 1-0 — Buenos Aires ARG
1955 — Stahlberg, Gideon vs Persitz, Raaphi — 1-0 — Ljubljana
1955 — Persitz, Raaphi vs Vidmar, Milan Jr — 0-1 — Ljubljana
1956 — Boutteville, Cesar vs Ivkov, Borislav — 1/2-1/2 — Vichy

7.Nb5 — 5.1% (22 parties)

1969 — Stoyko, Stephen E vs Sprague, Ross Frederick — 0-1 — Lincoln
1988 — Jacovides, Michael vs Hadjiyiannis, Costas — 1-0 — Cyprus
1991 — Campbell, Gordon vs Fortin, Jean — 1-0 — London,Canada
1992 — Russell, Robert vs Wall, Alejandro — 1-0 — San Antonio, TX USA
1992 — Russell, Bob vs Wall, Bill — 1-0 — ?

7.Nxc6 — 3.0% (13 parties)

1991 — Psion vs Rex Chess — 0-1 — Leserbrief U
1991 — Gouiran, Serge vs Dewet, M — 1-0 — Provence
1991 — Harding, Tim D vs Ginsberg, S. — 1-0 — Los Angeles, CA USA
1993 — Mauritsch, Herbert vs Fraidakis, Pantelis — 0-1 — Bad Wildbad GER
1995 — Schmitzer, Horst vs Kasueschke, Gregor — 1/2-1/2 — GER

7.Nb3 — 0.7% (3 parties)

1997 — Richardson, John R vs Kopec, Danny — 1/2-1/2 — London ENG
2003 — Alves, Luiz Henrique De Araujo vs Pelikian, Jefferson — 0-1 — Brasilia BRA
2011 — Bodiroga, Predrag vs Samu, Sorin-Mihai — 0-1 — Baile Felix ROU