A29j — English: Four Knights, 4.g3 Bb4 5.Bg2

1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.g3 Bb4 5.Bg2 * ● Trait aux Noirs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Avantages : case forte b5, case forte d5, paire de fous.
Faiblesses adverses : Bc8 enfermé, roi noir au centre.
Problèmes : roi au centre, Bc1 enfermé, Bg2 enfermé, 3 pièces non développées (C1, A1, H1).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● d3 — Libérer Bc1
● h3 — Empêcher ...Bg4

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Avantages : case forte d4, Bb4 actif, paire de fous.
Faiblesses adverses : Bc1 enfermé, Bg2 enfermé, roi blanc au centre.
Problèmes : roi au centre, Bc8 enfermé, 3 pièces non développées (C8, A8, H8).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● ...d6 — Libérer Bc8
● ...Bg4 — Clouer Nf3
● ...d5 — Rupture
● ...e4 — Rupture

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→g3, h2→g3	—
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● b5 (2v0), ● d5 (2v1)	● d4 (2v1)
Cases faibles	—	—
Centre	● d5 (2v1)	● d4 (2v1)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bg2	● Bg2 Enfermé (mob. 2)
Bb4		● Bb4 Actif (mob. 7)
Bc8		● Bc8 Non développé (mob. 0)
Paire de fous	● Oui	● Oui
Non développées	3 (c1, 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	semi-ouvert
Ruptures	● c4-c5, ● d2-d3, ● e2-e3	● …d7-d6, ● …d7-d5, ● …e5-e4

Partie
? 2000 – Round ? – Gulko, Boris – 0-1 – Komliakov, Viktor – G5 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 Bb4 5. Bg2 Bxc3 6. bxc3 O-O 7. O-O Re8 8. Ne1 b6 9. e4 Bb7 10. Nc2 Na5
1973 Leningrad Interzonal – Round 14 – Smejkal, Jan – 1/2-1/2 – Korchnoi, Viktor – G9 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 Bb4 5. Bg2 O-O 6. Nd5 Nxd5 7. cxd5 Nd4 8. Nxd4 exd4 9. O-O Bd6 10. e4 dxe3
2024 SuperUnited Rapid & Blitz Croatia – Round 15 – Caruana Fabiano – 0-1 – Firouzja Alireza – G71 1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. g3 Bb4 5. Bg2 O-O 6. Nd5 e4 7. Nh4 Re8 8. O-O d6 9. d3 exd3 10. Qxd3 Nxd5
40. Olympiad Open 2012 – Round 1.16 – Khairallah, Faisal – 0-1 – Salgado Lopez, Ivan – G23 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 Bb4 5. Bg2 O-O 6. Nd5 Bc5 7. O-O d6 8. d3 h6 9. a3 a5 10. b3 Ba7
7. Sinquefield Cup 2019 – Round 9.4 – Giri, Anish – 1/2-1/2 – Karjakin, Sergey – G52 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. g3 Bb4 5. Bg2 O-O 6. Nd5 Bc5 7. b4 Nxb4 8. Nxb4 Bxb4 9. Nxe5 d5 10. cxd5 Nxd5
Amber Rapid 2008 – Round 9 – Ivanchuk, Vasyl – 1-0 – Anand, Viswanathan – G36 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 Bb4 5. Bg2 O-O 6. Nd5 Bc5 7. d3 Nxd5 8. cxd5 Nd4 9. Nd2 d6 10. e3 Nf5
Brussels blitz 1987 – Round 1 – Huebner, Robert – 0-1 – Karpov, Anatoly – G10 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. g3 Bb4 5. Bg2 O-O 6. Nd5 Bc5 7. O-O d6 8. a3 a5 9. d3 h6 10. Nc3 Be6
Chess Classic, Frankfurt GER 1997 – Round 5 – Karpov, Anatoly – 1-0 – Anand, Viswanathan – G3 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 Bb4 5. Bg2 O-O 6. Nd5 Bc5 7. O-O d6 8. d3 Nxd5 9. cxd5 Nd4 10. Nxd4 Bxd4
FIDE Candidates 2016 – Round 3.4 – Topalov, Veselin – 0-1 – Aronian, Levon – G12 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. g3 Bb4 5. Bg2 O-O 6. Nd5 e4 7. Nh4 d6 8. Nxb4 Nxb4 9. a3 Nc6 10. d3 d5
FIDE World Cup 2019 – Round 1.1 – Rodshtein, Maxim – 1-0 – Bartel, Mateusz – G7 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. g3 Bb4 5. Bg2 O-O 6. Nd5 Bc5 7. d3 Nxd5 8. cxd5 Nd4 9. Nd2 d6 10. e3 Nf5
Moscow FIDE Grand Prix 2019 – Round 2.4 – Nakamura, Hikaru – 1/2-1/2 – Dubov, Daniil – G32 1. c4 e5 2. g3 Nf6 3. Nc3 Bb4 4. Bg2 Nc6 5. Nf3 Bxc3 6. bxc3 O-O 7. O-O e4 8. Nd4 Ne5 9. d3 c5 10. Nc2 exd3
Moskou ch-URS 1973 – Round 1 – Polugaevsky, Lev – 1/2-1/2 – Kuzmin, Gennadi – G3 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 Bb4 5. Bg2 O-O 6. Nd5 Nxd5 7. cxd5 Nd4 8. Nxd4 exd4 9. b3 Be7 10. Bb2 c5
Petropolis Interzonal 1973 – Round 11 – Smyslov, Vassily – 0-1 – Mecking, Henrique – G41 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 Bb4 5. Bg2 O-O 6. Nd5 e4 7. Nh4 Bc5 8. O-O Re8 9. d3 exd3 10. Qxd3 Ne5
Riga FIDE Grand Prix 2019 – Round 2.7 – So, Wesley – 1-0 – Karjakin, Sergey – G55 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. g3 Bb4 5. Bg2 O-O 6. Nd5 Bc5 7. O-O d6 8. e3 Re8 9. d4 Bg4 10. dxc5 e4
Saint Louis Rapid 2024 - Round 3 - Nepomniachtchi Ian - 1-0 - Praggnanandhaa R - G15 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. g3 Bb4 5. Bg2 O-O 6. Nh4 d6 7. O-O a5 8. d3 h6 9. Bd2 Re8 10. Rc1 Be6
Superbet Rapid 2019 – Round 1.3 – Caruana, Fabiano – 0-1 – Aronian, Levon – G3 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. g3 Bb4 5. Bg2 O-O 6. Nd5 e4 7. Nh4 d6 8. O-O g5 9. d4 h6 10. Be3 gxh4
Vugar Gashimov Mem 2018 – Round 1.2 – Ding, Liren – 1/2-1/2 – Wojtaszek, Radoslaw – G2 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. g3 Bb4 5. Bg2 d6 6. O-O O-O 7. d3 Re8 8. Bd2 Nd4 9. a3 Nxf3+ 10. Bxf3 Bxc3
World Blitz 2022 – Round 4.65 – Narayanan, Sunilduth Lyna – 1-0 – Uruci, Endrit – G225 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. g3 Bb4 5. Bg2 Bxc3 6. bxc3 O-O 7. O-O Re8 8. d3 e4 9. Ng5 exd3 10. exd3 b6
World Rapid 2016 – Round 9.24 – Dubov, Daniil – 1-0 – Mchedlishvili, Mikheil – G345 1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. g3 Bb4 5. Bg2 Bxc3 6. bxc3 O-O 7. O-O Re8 8. Ne1 d6 9. e4 Nd7 10. f4 exf4
World Rapid 2019 – Round 1.14 – Bartel, Mateusz – 0-1 – Karjakin, Sergey – G7 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. g3 Bb4 5. Bg2 O-O 6. Nd5 Bc5 7. O-O d6 8. d3 h6 9. e3 a6 10. a3 Ba7

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