A29r — English: Four Knights, 4.g3 d5 5.cxd5 Nxd5 6.Bg2 Nb6

1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.g3 d5 5.cxd5 Nxd5 6.Bg2 Nb6 * ○ Trait aux Blancs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Avantages : majorité centre (2v1), paire de fous, colonne c.
Faiblesses adverses : Bc8 enfermé, Bf8 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
● Rc — Tour sur colonne c

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Avantages : majorité aile_dame (3v2), case forte b4, case forte d4, case forte d5, paire de fous, colonne d.
Faiblesses adverses : Bc1 enfermé, Bg2 enfermé, roi blanc au centre.
Problèmes : roi au centre, Bc8 enfermé, Bf8 enfermé, 4 pièces non développées (C8, F8, A8, H8).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● ...Bg4 — Développer Bc8, clouer Nf3
● ...Be7 — Développer Bf8
● ...e4 — Rupture
● ...f6 — Rupture

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

A29r — Four Knights

1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.g3 d5 5.cxd5 Nxd5 6.Bg2 Nb6

Eval: [+0.23]

Les coups candidats

7.O-O — 83.8% (15521 parties) →

Ambassadeurs : Zielinski, Sergej (156x), Szerlak, Andrzej (73x), Morley, Paul (49x), Coyne, David W. (46x), Romanishin, Oleg M (38x), Bonoldi, Fabio (35x), Malinowski, Damian (33x), Sherwood, Russell (32x)

7.d3 — 9.9% (1831 parties)

Ambassadeurs : Owens, Johnny (26x), Uhlmann, Wolfgang (21x), Belchev, Branimir Petrov (19x), Galanov, Sergey Igorevich (18x), Brissman, Anders (10x), Adorjan, Andras (8x), Bartsch, Reinhard Andrea (8x), Kerndl, Rainer (7x)

7.a3 — 4.0% (738 parties)

Ambassadeurs : Uhlmann, Wolfgang (14x), Contin, Daniel (13x), Kulon, Klaudia (12x), Foisor, Ovidiu-Doru (11x), Foisor, Cristina-Adela (7x), Batrakov, Aleksandr Pavlovich (7x), Vaulin, Alexander P. (6x), Brooks, Ian S Dr (6x)

7.Rb1 — 1.7% (313 parties)

Ambassadeurs : Miezis, Normunds (53x), Cekro, Ekrem (8x), Nývlt, Zdenek (7x), Dziedzic, Andrzej (6x), Serafimov, Dimitar (5x), Frömbgen, Andreas (5x), Scherer, Max (4x), Nemec, Zdenek (4x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	7.O-O	7.d3	7.a3	7.Rb1
<1800	410	78%	15%	4%	2%
1800-2200	6576	83%	12%	4%	1%
2200-2600	8600	85%	8%	4%	2%
2600+	463	89%	3%	4%	3%

Évolution par décennie (% des parties)

Décennie	N parties	7.O-O	7.d3	7.a3	7.Rb1
1900s	1	100%	—	—	—
1920s	2	100%	—	—	—
1930s	47	77%	19%	2%	—
1940s	39	67%	26%	5%	—
1950s	81	72%	20%	5%	—
1960s	126	80%	12%	6%	—
1970s	154	79%	16%	4%	—
1980s	702	81%	14%	4%	0%
1990s	2250	82%	10%	6%	1%
2000s	3913	82%	11%	4%	3%
2010s	9168	85%	9%	3%	2%
2020s	2032	84%	8%	5%	2%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
7.O-O	85%	84%	▼ -0.9%
7.d3	9%	8%	▼ -1.5%
7.a3	3%	5%	▲ +1.4%
7.Rb1	2%	2%	▲ +0.6%

Joueurs célèbres

Champions du monde dans cette position

Kramnik, Vladimir — 10 parties
Carlsen, Magnus — 10 parties
Botvinnik, Mikhail — 7 parties
Kasparov, Garry — 7 parties
Ding, Liren — 7 parties
Anand, Viswanathan — 4 parties
Ju, Wenjun — 4 parties
Euwe, Max — 3 parties
Smyslov, Vladimir — 3 parties
Karpov, Anatoly — 3 parties
Hou, Yifan — 3 parties
Karpov, Aleksandr — 2 parties
Tal, Mikhail — 2 parties
Alekhine, Alexander — 1 partie
Gukesh D — 1 partie

Parties historiques

7.O-O — 83.8% (15521 parties)

1907 — Bernstein, Olivia vs Metger, Johannes — 1-0 — Ostende II
1928 — Goud, JH. vs Kroone, Gerard — 1/2-1/2 — NED
1928 — Regedzinski, Teodor vs Wertheim, Willem F — 1/2-1/2 — The Hague NED
1933 — Flohr, Salo vs Pokorny, Amos — 0-1 — Mnichovo Hradiste
1934 — Pitschak, Rudolf vs Flohr, Salo — 0-1 — Bad Liebenwerda

7.d3 — 9.9% (1831 parties)

1934 — Pitschak, Rudolf vs Boros, Sandor — 0-1 — Bad Liebenwerda
1936 — Kan, Ilya A vs Chekhover, Vitaly — 1/2-1/2 — Leningrad RUS
1936 — Wiesel, Laszlo vs Kovach, Alexander — 1-0 — Budapest HUN
1937 — Dobias, Josef vs Opocensky, Karel — 1-0 — Prague CZE
1937 — Dobias, Josef vs Opocensky, Karel — 1-0 — Prague CZE

7.a3 — 4.0% (738 parties)

1936 — Opocensky, Karel vs Flohr, Salo — 1/2-1/2 — Podebrady CZE
1940 — Dobias, Josef vs Podgorny, Jiri — 0-1 — Rakovnik
1946 — Vidmar, Milan Jr vs Alexandrescu, Gheorghe — 1-0 — ?
1955 — Taimanov, Mark vs Byvshev, Vasily — 0-1 — Moscow RUS
1958 — Botvinnik, Mikhail vs Dueckstein, Andreas — 1-0 — Munich GER

7.Rb1 — 1.7% (313 parties)

1984 — Hjorth, Gunnar vs Morovic Fernandez, Ivan — 1/2-1/2 — Thessaloniki GRE
1991 — Shvedchikov, Anatoli I. vs Olbrich, Joachim — 1-0 — Moscow RUS
1994 — Miezis, Normunds vs Jung, Karl-Otto — 1-0 — Schwaebisch Gmuend op
1994 — Azmaiparashvili, Zurab vs Gallego Jimenez, Victoriano — 1/2-1/2 — Cala Galdana ESP
1994 — Kacheishvili, Giorgi vs Ruck, Robert — 1/2-1/2 — Wch U18 Szeged HUN

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→g3, h2→g3	—
Passés	—	—
Majorité	● centre 2v1	● aile_dame 3v2

Cases

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

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● c	● d

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bg2	● Bg2 Enfermé (mob. 2)
Bc8		● Bc8 Non développé (mob. 5)
Bf8		● Bf8 Non développé (mob. 5)
Paire de fous	● Oui	● Oui
Non développées	3 (c1, a1, h1)	4 (c8, f8, 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	● d2-d3, ● e2-e3	● …e5-e4, ● …f7-f6, ● …f7-f5

Partie
19. European Teams 2013 – Round 1.2 – Topalov, Veselin – 1/2-1/2 – Aronian, Levon – G27 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Nb6 7. a3 Be7 8. b4 Be6 9. O-O O-O 10. d3 Nd4
1936 Podebrady – Round ? – Opocensky, Karel – 1/2-1/2 – Flohr, Salo – G56 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. a3 a5 8. O-O Be7 9. d3 O-O 10. Be3 Be6
1940 Rakovnik – Round 10 – Dobias, Josef – 0-1 – Podgorny, Jiri – G53 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. a3 Be6 8. d3 Be7 9. O-O O-O 10. b4 f6
1944 Brno ch CZE – Round 9 – Dobias, Josef – 0-1 – Richter, Emil – G13 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. d3 Be7 8. a3 Be6 9. b4 f5 10. O-O Bf6
1954 Hungary Ch – Round 1 – Szabo, Ladislav – 1-0 – Kluger, Gyula – G6 1. c4 Nf6 2. Nc3 e5 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. d3 Be7 8. a3 Be6 9. O-O f5 10. Be3 O-O
1955 Budapest HUN – Round ? – Koberl, Ferenc – 0-1 – Florian, Tibor – G7 1. c4 Nf6 2. Nc3 e5 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. d3 Be7 8. Nd2 Nd4 9. O-O O-O 10. b3 f5
1955 URS Ch sf – Round 1 – Taimanov, Mark E – 0-1 – Byvshev, Vasily – G6 1. c4 Nf6 2. Nc3 e5 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. a3 Be7 8. b4 Be6 9. d3 f6 10. Bb2 Qd7
1957 Marshall CC Ch 5657 – Round 12 – Bernstein, Sidney – 1-0 – Rankis, August – G15 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. d3 Be7 8. a4 a5 9. Be3 f5 10. O-O Be6
1958 Wageningen Caldex – Round 3 – Botvinnik, Mikhail – 1/2-1/2 – Flohr, Salo – G5 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 e5 5. Bg2 Nb6 6. Nf3 Nc6 7. d3 Be7 8. a3 a5 9. Be3 Be6 10. O-O Nd5
1959 Tbilisi ch-URS – Round 7 – Furman, Slavomir – 1-0 – Korchnoi, Viktor – G50 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 e5 5. Bg2 Nb6 6. Nf3 Nc6 7. a3 Be6 8. d3 f6 9. b4 a5 10. b5 Nd4
1960 UKR Ch sf – Round 10 – Berezhnoy, Viktor – 0-1 – Poliak, Evsey – G60 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. b3 Be7 8. Bb2 O-O 9. O-O Be6 10. Rc1 f5
1962 It IIb – Round 3 – De Rooi, Paul – 1/2-1/2 – Rellstab, Ludwig – G5 1. c4 Nf6 2. Nc3 e5 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. d3 Be7 8. Bd2 O-O 9. O-O f5 10. a4 a5
1962 Sweden – Round 1 – Nilsson, Zandor – 1/2-1/2 – Arnlind, Eric – G3 1. c4 Nf6 2. Nc3 e5 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. d3 Be7 8. a3 Be6 9. b4 O-O 10. Bb2 f5
1963 Kiev Avantgard Ch – Round ? – Kostiuchenko, Alexander – 0-1 – Bakhmatov, Eduard – G56 1. g3 e5 2. c4 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. a4 a5 8. O-O Be7 9. d4 exd4 10. Nb5 Bf6
1966 FRA Ch 41st – Round 8 – Roos, Michel – 0-1 – Andersen, Nor – G14 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. a3 Be7 8. b4 Be6 9. O-O f5 10. d3 Bf6
1966 It II Beverwijk NED – Round 1 – Waltemathe, A. – 0-1 – Sandor, Bela – G1 1. c4 Nf6 2. Nc3 e5 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. d3 Be7 8. a4 a5 9. O-O O-O 10. Be3 Be6
1969 Buesum – Round 1 – Bobotsov, Milko G – 1-0 – Saemisch, Friedrich – G2 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. d3 Be7 8. a3 Be6 9. b4 a5 10. b5 Nd4
1969 Rhyl ch-BCF – Round 8 – Haygarth, Michael J – 1/2-1/2 – Holmes, H. – G60 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. a3 a5 8. d3 Be7 9. Be3 O-O 10. Rc1 Nd5
3. Norway Blitz 2015 – Round 4.4 – Nakamura, Hikaru – 1/2-1/2 – Giri, Anish – G19 1. c4 Nf6 2. Nc3 e5 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. b3 Be7 8. Bb2 O-O 9. O-O Be6 10. d4 exd4
41. Olympiad Open 2014 – Round 6.2 – Ivanisevic, Ivan – 0-1 – Topalov, Veselin – G422 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Nb6 7. a4 a5 8. d3 Be7 9. Be3 Be6 10. Bxb6 cxb6
Amber-blindfold 20th 2011 – Round 9 – Gashimov, Vugar – 1-0 – Gelfand, Boris – G31 1. c4 Nf6 2. Nc3 e5 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. Rb1 a5 8. O-O Be7 9. d3 O-O 10. Be3 Be6
Amber-rapid 19th 2010 – Round 5 – Carlsen, Magnus – 0-1 – Karjakin, Sergey – G12 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nc3 Nb6 6. Nf3 Nc6 7. a3 Be7 8. b4 Be6 9. O-O O-O 10. Rb1 f6
Bosna SuperGM 2000 – Round 2 – Gurevich, Mikhail – 0-1 – Shirov, Alexei – G7 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Nb6 7. d3 Be7 8. a3 Be6 9. O-O O-O 10. b4 Nd4
FIDE World Cup 2025 – Round R1 Classical 2 – Huschenbeth Niclas – 1-0 – Bellahcene Bilel – G127 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 d6 5. c3 Nf6 6. Bg5 h6 7. Bh4 a6 8. a4 Ba7 9. Nbd2 Qe7 10. b4 g5
Interpolis 1983 – Round 11 – Portisch, Lajos – 1/2-1/2 – Vaganian, Rafael A – G51 1. c4 Nf6 2. Nc3 e5 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. d3 Be7 8. a3 O-O 9. O-O Be6 10. b4 a5
Interpolis 1991 – Round 5 – Timman, Jan H – 1-0 – Bareev, Evgeny – G15 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Nb6 7. a3 Be7 8. b4 Be6 9. Rb1 f6 10. O-O O-O
Linares 1981 – Round 1 – Portisch, Lajos – 0-1 – Karpov, Anatoly – G5 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. d3 Be7 8. a3 Be6 9. b4 a6 10. Bb2 Qd7
Moscow 1981 – Round ? – Smejkal, Jan – 1-0 – Timman, Jan H – G40 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Nb6 7. d3 Be7 8. a3 a5 9. Be3 O-O 10. O-O Bg4
Moskou 1981 – Round 1 – Smejkal, Jan – 1-0 – Timman, Jan H – G1 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Nb6 7. d3 Be7 8. a3 a5 9. Be3 O-O 10. O-O Bg4
Niksic 1983 – Round 7 – Portisch, Lajos – 1-0 – Petrosian, Tigran V. – G46 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. d3 Be7 8. a3 Be6 9. b4 O-O 10. O-O f6
Tilburg Fontys 1996 – Round 7 – Lautier, Joel – 0-1 – Piket, Jeroen – G29 1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Nb6 7. a3 Be7 8. b4 Be6 9. Rb1 f6 10. d3 O-O
World Cup 1989 – Round 1 – Ehlvest, Jaan – 1-0 – Hjartarson, Johann – G2 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Nb6 7. a3 Be7 8. b4 O-O 9. O-O Re8 10. Rb1 Bf8
World Rapid 2019 – Round 14.25 – Tomashevsky, Evgeny – 1-0 – Pashikian, Arman – G896 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nc3 Nb6 6. Nf3 Nc6 7. a3 Be7 8. b4 Be6 9. O-O O-O 10. Rb1 f6
XXVII SuperGM 2010 – Round 6 – Topalov, Veselin – 1-0 – Vallejo Pons, Francisco – G15 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Nb6 7. a3 g5 8. d3 g4 9. Nd2 h5 10. b4 h4

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