A20u — English: King’s, 2.g3 Nf6 3.Bg2 d5

1.c4 e5 2.g3 Nf6 3.Bg2 d5 * ○ Trait aux Blancs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Avantages : Bg2 actif, paire de fous.
Faiblesses adverses : Bc8 enfermé, Bf8 enfermé, roi noir au centre.
Problèmes : roi au centre, Bc1 enfermé, 5 pièces non développées (B1, G1, C1, A1, H1).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● Nc3 — Développer Nb1
● Nf3 — Développer Ng1
● d3 — Libérer Bc1

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Avantages : case forte e4, case forte g4, paire de fous.
Faiblesses adverses : Bc1 enfermé, roi blanc au centre, pawn c4 en prise.
Problèmes : roi au centre, Bc8 enfermé, Bf8 enfermé, 5 pièces non développées (B8, C8, F8, A8, H8).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● ...Nbd7 — Développer Nb8
● ...Bf5 — Développer Bc8
● ...Be7 — Développer Bf8
● ...c6 — Rupture

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

A20u — King’s

1.c4 e5 2.g3 Nf6 3.Bg2 d5

Eval: [+0.29]

Les coups candidats

4.cxd5 — 98.8% (12129 parties)

Ambassadeurs : Owens, Johnny (53x), Kerr, Stephen G.R. (52x), Quiñones Borda, Jorge Victor (48x), Vecek, Marjan (40x), Bonoldi, Fabio (39x), Mercadal Benejam, Josep (37x), Almarza Mato, Carlos (34x), Sýkora, Josef (32x)

4.d3 — 0.4% (45 parties)

Ambassadeurs : Bezold, Michael (2x), Gadia, Olicio (1x), Rocha, Antonio (1x), de Wall, Robert (1x), Holsapple, Boyd (1x), Siebrecht, Raphaelle (1x), Flear, Christine (1x), Manarin, Franco (1x)

4.Nc3 — 0.3% (34 parties)

Ambassadeurs : Rutter, Blair A (2x), Balouka-Myers, Toby (2x), Znuderl, Matej (1x), Castelluzzo, Salvatore (1x), Moore, John C (1x), Eckardt M (1x), Fekete, Bela (1x), Gombar, Janos (1x)

4.Nf3 — 0.1% (16 parties)

Ambassadeurs : Sykora, Petr (2x), Anderson, Len (2x), Shirazi, Kamran (1x), Ginsburg, Mark (1x), Stastny, Jan (1x), Michna, Marcus, Dr. (1x), Lehnert, Stefan (1x), Domingo Nunez, Alejandro (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	4.cxd5	4.d3	4.Nc3	4.Nf3
<1800	332	95%	2%	1%	1%
1800-2200	4545	99%	0%	0%	0%
2200-2600	5898	100%	0%	0%	0%
2600+	301	100%	—	—	—

Évolution par décennie (% des parties)

Décennie	N parties	4.cxd5	4.d3	4.Nc3	4.Nf3
1930s	2	100%	—	—	—
1940s	12	100%	—	—	—
1950s	20	100%	—	—	—
1960s	36	97%	3%	—	—
1970s	39	100%	—	—	—
1980s	218	98%	0%	—	0%
1990s	936	99%	0%	1%	0%
2000s	2443	98%	1%	0%	0%
2010s	6720	99%	0%	0%	0%
2020s	1850	99%	0%	0%	0%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
4.cxd5	99%	99%	+0.5%
4.d3	0%	0%	+0.0%
4.Nc3	0%	0%	-0.1%
4.Nf3	0%	0%	-0.1%

Joueurs célèbres

Champions du monde dans cette position

Ding, Liren — 10 parties
Carlsen, Magnus — 6 parties
Kramnik, Vladimir — 4 parties
Anand, Viswanathan — 4 parties
Kasparov, Garry — 2 parties
Hou, Yifan — 2 parties
Euwe, Max — 1 partie
Smyslov, Vladimir — 1 partie
Botvinnik, Mikhail — 1 partie
Karpov, Anatoly — 1 partie
Gukesh D — 1 partie

Parties historiques

4.cxd5 — 98.8% (12129 parties)

1933 — Euwe, Max vs Mulder, Wim — 1-0 — Amsterdam NED
1937 — Schelfhout, Willem vs Ritson-Morry, William — 1-0 — Hastings ENG
1940 — Smyslov, Vladimir vs Lisitsin, Georgy — 1/2-1/2 — Ch URS Moscow RUS
1941 — Junge, Klaus vs Bluemich, Max — 1-0 — Krakow/Warsaw
1942 — Seidman, Herbert vs Baker, Haris — 1-0 — New York, NY USA

4.d3 — 0.4% (45 parties)

1965 — Gadia, Olicio vs Rocha, Antonio — 0-1 — Rio de Janeiro BRA
1984 — de Wall, Robert vs Holsapple, Boyd — 1-0 — Dayton, OH USA
1990 — Bezold, Michael vs Luecke, Norbert — 1-0 — Berlin-Neukolln
1990 — Bezold, Michael vs Miralles, Gilles — 1-0 — Deutschland-Cup
1994 — Siebrecht, Raphaelle vs Flear, Christine — 0-1 — Chambery

4.Nc3 — 0.3% (34 parties)

1994 — Moore, John C vs Eckardt M — 1-0 — corr CompuServe
1996 — Znuderl, Matej vs Castelluzzo, Salvatore — 1-0 — Portoroz open
1996 — Pulec, Rozic Lea vs Simlova, Kvetuse — 0-1 — ?
1998 — Fekete, Bela vs Gombar, Janos — 0-1 — Paks HUN
1998 — Sosnov, Gennady vs Klimovich Anatoly — 1/2-1/2 — Moscow RUS

4.Nf3 — 0.1% (16 parties)

1989 — Shirazi, Kamran vs Ginsburg, Mark — 0-1 — Albany
1999 — Sykora, Petr vs Stastny, Jan — 0-1 — CZE-chT2V 9899
2001 — Michna, Marcus, Dr. vs Lehnert, Stefan — 0-1 — ?
2005 — Welz, Christian vs Aytac, Ahmed Enes — 1-0 — ?
2008 — Domingo Nunez, Alejandro vs Regincos Oliva, Laura — 1-0 — Padron

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

Cases

	♔ Blancs	♚ Noirs
Cases fortes	—	● e4 (2v1), ● g4 (2v0)
Cases faibles	—	● d5
Centre	—	● d4 (1v0), ● e4 (2v1)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bg2	● Bg2 Actif (mob. 5)
Bc8		● Bc8 Non développé (mob. 5)
Bf8		● Bf8 Non développé (mob. 5)
Paire de fous	● Oui	● Oui
Non développées	5 (b1, g1, c1, a1, h1)	5 (b8, 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	● c4-c5, ● d2-d3, ● e2-e3, ● f2-f3	● …c7-c6, ● …c7-c5, ● …d5-d4, ● …e5-e4

Partie
10. Tal Mem 2016 – Round 6.5 – Aronian, Levon – 1-0 – Giri, Anish – G25 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Nb6 7. d3 Be7 8. Be3 O-O 9. Nbd2 Be6 10. Rc1 Qd7
11. Norway Blitz 2023 – Round 6.4 – Firouzja, Alireza – 1-0 – Mamedyarov, Shakhriyar – G28 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Nb6 7. b3 Be7 8. Bb2 f6 9. Qc2 O-O 10. Rd1 Nb4
1943 Zlin – Round 3 – Zita, Frantisek – 1-0 – Vasicek, Martin – G23 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Bd6 6. O-O Nc6 7. Nc3 Nde7 8. d4 exd4 9. Nxd4 Nxd4 10. Qxd4 O-O
1965 BRA Ch 32th – Round 9 – Gadia, Olicio – 0-1 – Rocha, Antonio – G28 1. c4 Nf6 2. g3 d5 3. Bg2 e5 4. d3 Nc6 5. Nf3 Be7 6. cxd5 Nxd5 7. O-O O-O 8. a3 Be6 9. b4 a6 10. Bb2 f6
2025 FIDE World Cup - Round R1 Classical 1 - Cahaya, Satria Duta - 1/2-1/2 - Haik M. Martirosyan - G664 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Nb6 7. b3 Bd6 8. Bb2 O-O 9. d3 Re8 10. Nbd2 a5
3. Norway Chess 2015 – Round 1 – Nakamura, Hikaru – 1-0 – Hammer, Jon Ludvig – G1 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Nb6 7. b3 Be7 8. Bb2 f6 9. d4 e4 10. Ne1 f5
34. ECC Open 2018 – Round 1.5 – Howell, David W L – 1/2-1/2 – Burg, Twan – G25 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Be7 7. d4 e4 8. Ne5 f5 9. Nxc6 bxc6 10. Qc2 Qd6
Amber-blindfold 13th 2004 – Round 5 – Topalov, Veselin – 1/2-1/2 – Vallejo Pons, Francisco – G10 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Nb6 7. d3 Be7 8. a3 O-O 9. Nbd2 a5 10. b3 Be6
Croatia GCT 2019 – Round 6.1 – Ding, Liren – 1-0 – Nepomniachtchi, Ian – G31 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Be7 7. d4 e4 8. Ne5 f5 9. Nxc6 bxc6 10. Qc2 Nb4
FIDE World Cup 2017 – Round 2.3 – Li, Chao – 1/2-1/2 – Sevian, Samuel – G254 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Nb6 7. b3 g6 8. Nc3 Be7 9. d3 O-O 10. Bh6 Re8
FIDE World Cup 2019 – Round 2.3 – Ding, Liren – 1-0 – Movsesian, Sergei – G258 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Nb6 7. b3 Bd6 8. Bb2 O-O 9. d3 Qe7 10. Nbd2 Ba3
FIDE World Cup 2025 – Round R1 Classical 1 – Aleksandar Indjic – 1-0 – Schnaider Ilan – G28 1. c4 e6 2. g3 d5 3. Bg2 Nf6 4. Nf3 Be7 5. O-O O-O 6. d4 dxc4 7. Qc2 a6 8. a4 Bd7 9. Qxc4 Bc6 10. Bg5 Nbd7
GCT Blitz Paris 2017 – Round 14.3 – Topalov, Veselin – 1/2-1/2 – Vachier-Lagrave, Maxime – G68 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Nb6 7. b3 Bd6 8. Nc3 O-O 9. Bb2 Re8 10. d3 Bf8
GCT Blitz Paris 2017 – Round 4.4 – Topalov, Veselin – 1/2-1/2 – Karjakin, Sergey – G19 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Be7 7. d4 e4 8. Ne5 f5 9. Nxc6 bxc6 10. Qc2 Qd7
GCT Rapid Paris 2016 – Round 2.5 – Aronian, Levon – 1-0 – Fressinet, Laurent – G10 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Be7 7. d4 e4 8. Ne5 f5 9. Nxc6 bxc6 10. Qc2 Qd7
Hoogovens 1999 – Round 1 – Topalov, Veselin – 1-0 – Timman, Jan H – G1 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Be7 7. d4 e4 8. Ne5 f5 9. Nxc6 bxc6 10. Qa4 Qd7
Lindores Abbey Tal Memorial 2021 – Round 1.12 – Abdusattorov, Nodirbek – 1-0 – Kosteniuk, Alexandra – G4 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Nb6 7. b3 Be7 8. Bb2 f6 9. Nc3 O-O 10. Rc1 Bg4
Saint Louis Blitz 2023 – Round 15.5 – Robson, Ray – 1/2-1/2 – So, Wesley – G75 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Nf6 7. d3 h6 8. Nbd2 Bd6 9. b3 O-O 10. Bb2 Re8
Sharjah Grand Prix 2017 – Round 6.1 – Adams, Michael – 1/2-1/2 – Vachier-Lagrave, Maxime – G46 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Nb6 7. b3 Bd6 8. Bb2 O-O 9. Nc3 Re8 10. Ne4 Bf8
SuperGM 2000 – Round 6 – Bareev, Evgeny – 1-0 – Huebner, Robert – G18 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Nb6 7. d3 Be7 8. a3 Be6 9. Nbd2 f6 10. b4 O-O
Tal Memorial 2007 – Round 7 – Carlsen, Magnus – 1/2-1/2 – Gelfand, Boris – G28 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Be7 7. d4 e4 8. Ne5 f5 9. Nxc6 bxc6 10. Nc3 O-O
World Blitz 2007 – Round 30 – Carlsen, Magnus – 1/2-1/2 – Gelfand, Boris – G288 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Be7 7. d3 O-O 8. a3 a5 9. b3 Be6 10. Bb2 f6
World Blitz 2016 – Round 17.3 – Nakamura, Hikaru – 0-1 – Vachier-Lagrave, Maxime – G682 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Nb6 7. b3 Bd6 8. Bb2 O-O 9. d3 Re8 10. Nbd2 Bg4
World Blitz 2018 – Round 11.4 – Le, Quang Liem – 1/2-1/2 – Giri, Anish – G659 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Nb6 7. b3 Be7 8. Bb2 f6 9. d3 O-O 10. Nbd2 Be6
World Blitz 2022 – Round 16.9 – Dardha, Daniel – 1/2-1/2 – Harikrishna, Pentala – G884 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Be7 7. d4 e4 8. Ne5 f5 9. Nxc6 bxc6 10. Qc2 Bd7
World Blitz 2022 – Round 20.38 – Shankland, Sam – 1-0 – Hansen, Eric – G1070 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Nb6 7. b3 g6 8. Nc3 Bg7 9. Ba3 a5 10. Rc1 Nb4
World Blitz 2022 – Round 3.29 – Yakubboev, Nodirbek – 0-1 – Martirosyan, Haik M. – G145 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Nb6 7. b3 Be7 8. Bb2 f6 9. Qc2 Nb4 10. Qc1 c5
World Blitz Final 2012 – Round 8 – Kotsur, Pavel – 0-1 – Karjakin, Sergey – G55 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. d4 e4 7. Ne5 f5 8. Nxc6 bxc6 9. Qc2 Qd7 10. a3 Be7
World Rapid 2016 – Round 6.2 – Aronian, Levon – 1-0 – Korobov, Anton – G218 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Nb6 7. b3 Be7 8. Bb2 f6 9. Qc1 O-O 10. Rd1 Qe8
World Rapid 2019 – Round 15.53 – Nikolov, Nikolay Petrov – 1/2-1/2 – Hansen, Eric – G987 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Nb6 7. b3 Bd6 8. Bb2 O-O 9. d3 Bf5 10. Nbd2 Qd7
World Rapid 2021 – Round 1.2 – Donchenko, Alexander – 0-1 – Nakamura, Hikaru – G12 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Nb6 7. b3 Be6 8. Bb2 f6 9. Nc3 Qd7 10. Qc1 Nd5

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