E15a — Queen’s Indian: 4.g3

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 ● Trait aux Noirs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

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Plans. Bg2 (Fianchetto, fou sur la grande diagonale — 43 % des parties) ; b3 (Préparer le fianchetto — 30 % des parties) ; Qc2 (Prépare O-O-O — 8 % des parties) ; Qa4 (Contrôle diagonale a4-e8, Prépare O-O-O — 7 % des parties) ; Nbd2 (Développer b1 — 6 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

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Plans. ...Ba6 (Développer c8 — 53 % des parties) ; ...Bb7 (Fianchetto, fou sur la grande diagonale — 42 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→g3, h2→g3	● a7→b6, c7→b6, d7→e6, f7→e6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● f4 (2v0), ● e5 (2v0), ● g5 (2v0)	—
Cases faibles	—	—
Centre	● d4 (2v0), ● e5 (2v0)	● d5 (2v1), ● e4 (1v0)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bf1	● Bf1 Non développé (mob. 2)
Bc8		● Bc8 Non développé (mob. 2)
Bf8		● Bf8 Non développé (mob. 5)
Paire de fous	● Oui	● Oui
Non développées	5 (● b1, ● c1, ● f1, ● 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	mobile
Ruptures	● c4-c5, ● d4-d5	● …c7-c5, ● …d7-d5, ● …e6-e5

Partie
1926 Semmering – Round 10 – Gruenfeld, Ernst – 1-0 – Nimzowitsch, Aron – G111 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Be7 5. Bg2 O-O 6. O-O Ba6 7. Nbd2 c6 8. b3 d5 9. Bb2 Nbd7 10. Rc1 Rc8
1932 Budapest – Round 1 – Canal, Esteban – 1/2-1/2 – Szekely, Jeno – G22 1. d4 Nf6 2. Nf3 b6 3. c4 e6 4. g3 d5 5. Bg2 Bb7 6. O-O dxc4 7. Qa4+ Nbd7 8. Ne5 Bxg2 9. Kxg2 a6 10. Qc6 Be7
1956 Moscow olm fin-B – Round 11 – Uhlmann, Wolfgang – 1/2-1/2 – O'Kelly, Albéric de Galway – G122 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 c6 5. Bg2 Be7 6. O-O O-O 7. b3 d5 8. Nbd2 Bb7 9. Bb2 Nbd7 10. Rc1 Rc8
1958 Sofia – Round 1 – Bobekov, Radko – 1-0 – Gerenski, Hristo – G3 1. d4 e6 2. Nf3 Nf6 3. c4 b6 4. g3 Be7 5. Nc3 d5 6. Bg2 O-O 7. O-O Ba6 8. Ne5 c6 9. b3 Nfd7 10. e4 Nxe5
1968 Gori – Round 1 – Tal, Mikhail – 1-0 – Mukitsashvili – G1 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Be7 5. Bg2 O-O 6. O-O Ba6 7. Qc2 c6 8. b3 d5 9. Nc3 b5 10. Ne5 Nfd7
43. Olympiad 2018 – Round 4.40 – Gallego Alcaraz, Andres Felipe – 1/2-1/2 – Hansen, Eric – G272 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 c6 5. Bg2 d5 6. O-O Be7 7. b3 O-O 8. Bb2 Nbd7 9. Nbd2 Bb7 10. Ne5 Nxe5
Antalya TUR, World Teams Championship 2013 – Round 7.4 – Fridman, Daniel – 1/2-1/2 – Kamsky, Gata – G55 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 a5 5. Bg2 Ba6 6. Ne5 c6 7. O-O d5 8. Nc3 Bd6 9. cxd5 Nxd5 10. Nxd5 cxd5
FIDE World Cup 2015 – Round 1.1 – Kasimdzhanov, Rustam – 1/2-1/2 – Kovalyov, Anton – G17 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 c6 5. Bg2 d5 6. O-O Be7 7. Nbd2 O-O 8. Qc2 Bb7 9. e4 Na6 10. Rd1 Qc8
World Rapid 2019 – Round 1.40 – Faizrakhmanov, Ramil – 0-1 – Zubov, Alexander – G34 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 c6 5. Nc3 d5 6. Bg2 Nbd7 7. O-O Bb7 8. e4 dxc4 9. a4 a6 10. Qe2 b5
World Rapid 2019 – Round 3.10 – Dragnev, Valentin – 0-1 – Zubov, Alexander – G153 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 c6 5. Bg2 d5 6. O-O Nbd7 7. Nbd2 Ba6 8. b3 Be7 9. Bb2 O-O 10. Re1 c5

E15a — Fianchetto Variation (1926)

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3

Les coups candidats

4…Ba6 — 52.7% (39736 parties) →

Ambassadeurs : Karpov, Anatoly (191x), Bakheet Farag (158x), Salzmann, Stefan (156x), Timman, Jan H (146x), Epishin, Vladimir (134x), Pérez López, Alberto (118x), Nikolic, Predrag (114x), Van Wely, Loek (109x)

4…Bb7 — 41.5% (31260 parties) →

Ambassadeurs : Naumkin, Igor (138x), Popov, Vladimir Valentinovich (86x), Ilyasov, Anatoly Fedorovich (86x), Karpov, Anatoly (84x), Ivkov, Borislav (82x), Lengyel, Levente (56x), Mayorau, Mikita (55x), Ribli, Zoltan (49x)

4…Bb4+ — 4.5% (3387 parties) →

Ambassadeurs : Fedorchuk, Sergey A. (50x), Romanishin, Oleg M (35x), Tiviakov, Sergei (33x), Miles, Anthony J (30x), Liebert, Heinz (30x), Bernal Varela, Nelson (26x), Popov, Vladimir Valentinovich (22x), Vesselovsky, Serguei (19x)

4…c6 — 0.5% (384 parties)

Ambassadeurs : Kovalyov, Anton (27x), Tiviakov, Sergei (9x), Kovalyov, Anatoly (8x), Vallejo Pons, Francisco (6x), Ostrovskiy, Andrey (6x), Horvath, Csaba (6x), Samunenkov, Ihor (5x), Sargissian, Gabriel (4x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	4…Ba6	4…Bb7	4…Bb4+	4…c6
<1800	2798	41%	53%	4%	0%
1800-2200	24833	49%	46%	3%	0%
2200-2600	37653	58%	35%	5%	1%
2600+	3226	59%	33%	7%	1%

Évolution par décennie (% des parties)

Décennie	N parties	4…Ba6	4…Bb7	4…Bb4+	4…c6
1950s	630	18%	79%	2%	0%
1960s	751	14%	78%	7%	—
1970s	1475	21%	72%	5%	0%
1980s	4252	52%	41%	6%	0%
1990s	8883	52%	43%	5%	0%
2000s	18976	60%	36%	3%	0%
2010s	30832	52%	42%	5%	1%
2020s	9600	53%	41%	5%	1%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
4…Ba6	52%	53%	▲ +1.6%
4…Bb7	42%	41%	▼ -0.8%
4…Bb4+	5%	5%	-0.3%
4…c6	1%	1%	+0.1%

Joueurs célèbres

Champions du monde dans cette position

Tal, Mikhail — 10 parties
Karpov, Anatoly — 10 parties
Botvinnik, Mikhail — 10 parties
Anand, Viswanathan — 10 parties
Kasparov, Garry — 10 parties
Kramnik, Vladimir — 10 parties
Carlsen, Magnus — 10 parties
Hou, Yifan — 10 parties
Ding, Liren — 10 parties
Ju, Wenjun — 10 parties
Gukesh D — 7 parties
Smyslov, Vladimir — 6 parties
Karpov, Aleksandr — 3 parties

Parties historiques

4…Ba6 — 52.7% (39736 parties)

1951 — Kapu, Jeno vs Laszlo, Deli — 1-0 — Hungary ch
1952 — Gentil Junior, Luiz vs Trifunovic, Petar — 0-1 — Mar del Plata ARG
1952 — Goldenov, Boris P vs Borisenko, Georgy K — 0-1 — Minsk BLR
1952 — Fridstein, German vs Cherepkov, Alexander V — 1/2-1/2 — Riga LAT
1952 — Vaitonis, Povilas vs Unzicker, Ferdinand, Dr. — 1/2-1/2 — Saltsjobaden SWE

4…Bb7 — 41.5% (31260 parties)

1950 — Nielsen, Julius vs Vestol, Aage — 1/2-1/2 — Reykjavik ISL
1950 — Buerger, Victor vs Veitch, Walter — 1-0 — Buxton
1950 — Miguel, Nahuel vs Kottnauer, Cenek — 1-0 — Amsterdam NED
1950 — Gudmundsson, Gudbjartur vs Kramer, Haije — 1/2-1/2 — Amsterdam NED
1950 — Pfeiffer, Gerhard vs Sahlmann, Walter — 1/2-1/2 — FRG-ch Bad Pyrmont GER

4…Bb4+ — 4.5% (3387 parties)

1950 — Szapiel, Henryk vs Gawlikowski, Stanislaw — 0-1 — Bielsko Biala
1951 — Stein, Georg vs Urseanu, Veniamin — 1-0 — Bucharest ROU
1952 — Goldenov, Boris P vs Konstantinopolsky, Alexander — 1/2-1/2 — Moskou ch-URS
1953 — Florian, Tibor vs Anay Barche — 1/2-1/2 — HUN-ch Budapest HUN
1953 — Uhlmann, Wolfgang vs Wiese, Klaus Peter — 1-0 — Leipzig GER

4…c6 — 0.5% (384 parties)

1956 — Uhlmann, Wolfgang vs O'Kelly, Albéric de Galway — 1/2-1/2 — Moskou olm
1972 — Williams, A. Howard vs Tan, Lian Ann — 1-0 — Skopje MKD
1989 — Damljanovic, Branko vs Dizdarevic, Emir — 1-0 — Zenica BIH
1991 — Pavlovic, Dragoljub vs Maksimovic, Branimir — 0-1 — Banja Vrucica BIH
1993 — Couche, Didier vs Sula, Zeqir — 1/2-1/2 — Cappelle op Cappelle la Grand