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

A29j — Four Knights

1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.g3 Bb4 5.Bg2

Eval: [+0.10]

Les coups candidats

5…O-O — 88.7% (6056 parties)

Ambassadeurs : Zielinski, Sergej (91x), Belchev, Branimir Petrov (47x), Uhlmann, Wolfgang (36x), Beck, Georges (32x), Tsenkov, Ljubomir (28x), Morley, Paul (25x), Popov, Vladimir Valentinovich (22x), Chorfi, Khaled (21x)

5…Bxc3 — 6.4% (439 parties)

Ambassadeurs : Uhlmann, Wolfgang (6x), Sega, Carlos Alberto (4x), Hecht, Hans-Joachim (4x), Kholmov, Ratmir D (3x), Epishin, Vladimir (3x), Kovalenko, Igor (3x), Andriasian, Zaven (3x), Roesemann, Rainer (2x)

5…d6 — 4.3% (296 parties)

Ambassadeurs : Henneberg Olga (5x), Bartsch, Reinhard Andrea (3x), Zielinski, Sergej (3x), Dziedzic, Andrzej (3x), Nippula, Timo (2x), Franck, Rudolf (2x), Malmstroem, Jan Hendrik (2x), Maylott, Peter S. (2x)

5…d5 — 0.2% (13 parties)

Ambassadeurs : Legler, Derek (2x), Brantley (1x), GACHIRA LEONARD (1x), Moerschel, Natalie (1x), Koch, Stefanie (1x), Morawietz, Markus (1x), Berg, Juergen (1x), Chandler, Tom (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	5…O-O	5…Bxc3	5…d6	5…d5
<1800	190	81%	12%	6%	—
1800-2200	2101	88%	7%	5%	0%
2200-2600	2599	91%	6%	2%	—
2600+	238	90%	7%	3%	—

Évolution par décennie (% des parties)

Décennie	N parties	5…O-O	5…Bxc3	5…d6	5…d5
1920s	1	—	—	100%	—
1930s	2	100%	—	—	—
1940s	3	67%	33%	—	—
1950s	4	75%	25%	—	—
1960s	28	89%	4%	7%	—
1970s	330	95%	4%	1%	—
1980s	389	93%	3%	3%	0%
1990s	1131	89%	7%	4%	0%
2000s	1851	89%	6%	4%	0%
2010s	2563	87%	7%	5%	0%
2020s	528	89%	7%	3%	0%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
5…O-O	87%	89%	▲ +2.2%
5…Bxc3	7%	7%	▼ -0.7%
5…d6	5%	3%	▼ -2.0%
5…d5	0%	0%	+0.1%

Joueurs célèbres

Champions du monde dans cette position

Smyslov, Vladimir — 10 parties
Kasparov, Garry — 10 parties
Anand, Viswanathan — 10 parties
Karpov, Anatoly — 9 parties
Karpov, Aleksandr — 3 parties
Kramnik, Vladimir — 3 parties
Ding, Liren — 3 parties
Carlsen, Magnus — 2 parties
Alekhine, Alexander — 1 partie
Botvinnik, Mikhail — 1 partie
Tal, Mikhail — 1 partie
Ju, Wenjun — 1 partie

Parties historiques

5…O-O — 88.7% (6056 parties)

1938 — Hanauer, Anthony vs Reshevsky, Samuel — 0-1 — New York, NY USA
1939 — De Ronde, Chris vs Tautvaisas, Povilas — 1-0 — Buenos Aires ARG
1940 — Hanauer, Milton Loeb vs Bernstein, Sidney — 1/2-1/2 — Ventnor City
1949 — Piskov, Kamen Penev vs Dimitrov Krastev, Krastjo — 0-1 — Sofia BUL
1955 — Filip, Miroslav vs Barta, Jan — 0-1 — Sliac

5…Bxc3 — 6.4% (439 parties)

1940 — Zíta, František vs Hromadka, Karel — 0-1 — Rakovnik
1952 — Martello Panno, David vs Huguet, Horacio E — 1/2-1/2 — Buenos Aires ARG
1967 — Langeweg, Kick vs Krabbe, Thomas — 1-0 — Zierikzee ch-NED
1971 — Denman, Brian John vs Harman, Ronald F A — 1/2-1/2 — Blackpool ENG
1972 — Malich, Burkhard, Dr. vs Hecht, Hans-Joachim — 1/2-1/2 — Skopje ol final a

5…d6 — 4.3% (296 parties)

1922 — Alekhine, Alexander vs Villeneau — 1-0 — Paris FRA
1964 — Avner, Uri vs Adamski, Andrzej — 1/2-1/2 — Krakow POL
1969 — Yudovich, Mikhail M vs Volovich, Anatoly — 0-1 — Moscow RUS
1978 — Zahilas, Loukas N. vs Soilemezis, Anastasios — 1-0 — ?
1978 — Fesche, Svein Tore vs Walisiak, Roman — 1-0 — Bruges BEL

5…d5 — 0.2% (13 parties)

1980 — Brantley vs GACHIRA LEONARD — 1-0 — cr.
1995 — Chandler, Tom vs Gordon Sandra — 1-0 — ?
1997 — Horak, Miroslav vs Kostrhoun, Petr — 1-0 — Znojmo
1998 — Moerschel, Natalie vs Koch, Stefanie — 1-0 — Hamburg GER
1999 — Morawietz, Markus vs Berg, Juergen — 1-0 — Hassloch

	♔ 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
1940 Rakovnik – Round 10 – Zíta, František – 0-1 – Hromadka, Karel – G54 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 Bb4 5. Bg2 Bxc3 6. bxc3 Qe7 7. O-O d6 8. d4 O-O 9. h3 Rb8 10. e3 Bd7
1967 Zierikzee ch-NED – Round 8 – Langeweg, Kick – 1-0 – Krabbe, Thomas – G39 1. c4 Nc6 2. Nc3 e5 3. g3 Nf6 4. Bg2 Bb4 5. Nf3 Bxc3 6. bxc3 O-O 7. O-O Re8 8. d3 d6 9. e4 b6 10. Nh4 Ne7
1969 Schwerin – Round 19 – Pietzsch, Wolfgang – 0-1 – Baumbach, Friedrich, Dr. – G108 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 Bb4 5. Bg2 O-O 6. Nd5 e4 7. Nh4 Re8 8. O-O Bc5 9. d3 exd3 10. Qxd3 Ne5
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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