Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→g3, h2→g3	● d7→e6, f7→e6
Passés	—	—
Majorité	● aile dame 3v2	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● d4 (2v1), ● f4 (2v0), ● b5 (2v1)	● b4 (2v0), ● g4 (2v0), ● c5 (2v1)
Cases faibles	—	—
Centre	● d4 (2v1), ● d5 (3v2)	—

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● d	● c

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bf1	● Bf1 Non développé (mob. 2)
Bc8		● Bc8 Non développé (mob. 0)
Bf8		● Bf8 Non développé (mob. 5)
Paire de fous	● Oui	● Oui
Non développées	4 (● c1, ● f1, ● 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	mobile
Ruptures	—	● …d7-d5

A33q — English: Symmetrical, Geller, 7.Nb3 Ne5

1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Nc6 6.g3 Qb6 7.Nb3 Ne5 * ○ Trait aux Blancs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plans. e4 (Occuper le centre — 92 % des parties) ; Bg2 (Fianchetto, fou sur la grande diagonale — 6 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plans. ...Bb4 (Clouer c3, Fou actif (mobilité 7), Développer f8 — 90 % des parties) ; ...Nxc4 (Cavalier actif en c4 — 6 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Partie
1. GRENKE Chess Classic 2013 – Round 4.1 – Fridman, Daniel – 1/2-1/2 – Anand, Viswanathan – G8 1. Nf3 c5 2. c4 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3 Qb6 7. Nb3 Ne5 8. e4 Bb4 9. Qe2 d6 10. Bd2 a5
1970 Belgrade URS-World – Round 4.3 – Portisch, Lajos – 1/2-1/2 – Korchnoi, Viktor – G31 1. Nf3 c5 2. c4 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Qb6 7. Nb3 Ne5 8. e4 Bb4 9. Qe2 O-O 10. f4 Nc6
1971 Hoogovens – Round 13 – Ree, Hans – 1-0 – Van den Berg, Cees – G22 1. c4 Nf6 2. Nf3 c5 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Qb6 7. Nb3 Ne5 8. e4 Bb4 9. Qe2 Bxc3+ 10. bxc3 d6
8. Sinquefield Cup 2021 – Round 4.2 – Caruana, Fabiano – 1/2-1/2 – So, Wesley – G17 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Qb6 7. Nb3 Ne5 8. e4 Bb4 9. Qe2 d6 10. Bd2 O-O
Belgrad cm 1977 – Round 3 – Korchnoi, Viktor – 1-0 – Spassky, Boris V. – G1 1. Nf3 Nf6 2. c4 c5 3. d4 e6 4. Nc3 cxd4 5. Nxd4 Nc6 6. g3 Qb6 7. Nb3 Ne5 8. e4 Bb4 9. Qe2 O-O 10. f4 Nc6
Bilbao Final Masters 2015 – Round 5.2 – Anand, Viswanathan – 1/2-1/2 – So, Wesley – G4 1. c4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3 Qb6 7. Nb3 Ne5 8. e4 Bb4 9. Qe2 d6 10. Bd2 a5
ch-Wereld Teams 1989 – Round 1 – Vaganian, Rafael A – 1/2-1/2 – Horvath, Jozsef – G1 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 Qb6 6. Nb3 e6 7. g3 Ne5 8. e4 Bb4 9. Qe2 d6 10. f4 Nc6
Dortmund 1995 – Round 3 – Lobron, Eric – 0-1 – Kramnik, Vladimir – G11 1. c4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3 Qb6 7. Nb3 Ne5 8. e4 Bb4 9. Qe2 d6 10. f4 Nc6
FIDE Candidates 2013 – Round 8.1 – Radjabov, Teimour – 0-1 – Gelfand, Boris – G28 1. Nf3 c5 2. c4 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3 Qb6 7. Nb3 Ne5 8. e4 Bb4 9. Qe2 d6 10. f4 Nc6
Hoogovens 1999 – Round 4 – Ivanchuk, Vasyl – 1-0 – Sokolov, Ivan. – G26 1. Nf3 Nf6 2. c4 c5 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Qb6 7. Nb3 Ne5 8. e4 Bb4 9. Qe2 Bxc3+ 10. bxc3 d6
Interpolis 1985 – Round 1 – Polugaevsky, Lev – 0-1 – Ljubojevic, Ljubomir – G29 1. Nf3 c5 2. c4 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3 Qb6 7. Nb3 Ne5 8. e4 d6 9. f4 Ng6 10. Qe2 Be7
Jerusalem FIDE Grand Prix 2019 – Round 1.2 – Gelfand, Boris – 1/2-1/2 – Nepomniachtchi, Ian – G16 1. Nf3 c5 2. c4 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3 Qb6 7. Nb3 Ne5 8. e4 Bb4 9. Qe2 d6 10. Bd2 Bd7
Linares 1989 – Round 1 – Karpov, Anatoly – 1/2-1/2 – Gulko, Boris – G2 1. c4 c5 2. Nc3 Nf6 3. Nf3 e6 4. d4 cxd4 5. Nxd4 Nc6 6. g3 Qb6 7. Nb3 Ne5 8. e4 Bb4 9. Qe2 d6 10. f4 Nc6
Moscow 1975 – Round 1 – Beliavsky, Alexander G – 1-0 – Geller, Efim P – G1 1. c4 c5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 cxd4 5. Nxd4 e6 6. g3 Qb6 7. Nb3 Ne5 8. e4 Bb4 9. Qe2 O-O 10. f4 Nc6
Novi Sad olm 1990 – Round 9 – Morovic Fernandez, Ivan – 1/2-1/2 – Timman, Jan H – G62 1. Nf3 Nf6 2. c4 c5 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Qb6 7. Nb3 Ne5 8. e4 Bb4 9. Qe2 d6 10. f4 Nc6
Olympiad 2002 – Round 8 – Amoros Marin, Marcos – 0-1 – Almasi, Zoltan – G252 1. c4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Qb6 5. Nb3 Nf6 6. Nc3 e6 7. g3 Ne5 8. e4 Bb4 9. Qe2 d6 10. Bd2 O-O
Paris Immopar rapid 1991 – Round 1 – Korchnoi, Viktor – 0-1 – Anand, Viswanathan – G7 1. Nf3 c5 2. c4 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3 Qb6 7. Nb3 Ne5 8. e4 Bb4 9. Qe2 d6 10. Bd2 Bd7
Renova FIDE GP Zug 2013 – Round 8.3 – Morozevich, Alexander – 0-1 – Topalov, Veselin – G44 1. Nf3 c5 2. c4 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Qb6 7. Nb3 Ne5 8. e4 Bb4 9. c5 Qc6 10. f3 b6
Tal Memorial Tournament 1995 – Round 9 – Vaganian, Rafael A – 1/2-1/2 – Kramnik, Vladimir – G14 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Qb6 7. Nb3 Ne5 8. e4 Bb4 9. Qe2 d6 10. f4 Nc6
World Blitz 2015 – Round 16.9 – Nepomniachtchi, Ian – 1/2-1/2 – Leko, Peter – G1032 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Qb6 7. Nb3 Ne5 8. Bg2 Nxc4 9. O-O Bb4 10. Bg5 d5
World Blitz 2016 – Round 1.21 – Dubov, Daniil – 1-0 – Halkias, Stelios – G14 1. c4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3 Qb6 7. Nb3 Ne5 8. Bg2 Nxc4 9. O-O Be7 10. e4 d6
World Cup 1988 – Round 1 – Portisch, Lajos – 1-0 – Sax, Gyula – G5 1. c4 Nf6 2. Nc3 c5 3. Nf3 Nc6 4. d4 cxd4 5. Nxd4 Qb6 6. Nb3 e6 7. g3 Ne5 8. e4 Bb4 9. Qe2 d6 10. f4 Nc6
World Cup 1988 – Round 1 – Timman, Jan H – 1/2-1/2 – Sax, Gyula – G102 1. Nf3 Nf6 2. c4 c5 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 Qb6 6. Nb3 e6 7. g3 Ne5 8. e4 Bb4 9. Qe2 d6 10. f4 Nc6
World Cup 1989 – Round 1 – Vaganian, Rafael A – 1/2-1/2 – Ehlvest, Jaan – G6 1. c4 Nf6 2. Nc3 c5 3. Nf3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Qb6 7. Nb3 Ne5 8. e4 Bb4 9. Qe2 d6 10. f4 Nc6
World Rapid 2019 – Round 13.18 – Gelfand, Boris – 1-0 – Tregubov, Pavel V. – G825 1. c4 Nf6 2. Nf3 c5 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 Qb6 6. Nb3 e6 7. g3 Ne5 8. e4 Bb4 9. Qe2 d6 10. Bd2 a5

A33q — Symmetrical, Geller (1970)

1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Nc6 6.g3 Qb6 7.Nb3 Ne5

Les coups candidats

8.e4 — 91.8% (888 parties)

Ambassadeurs : Korchnoi, Viktor (8x), Rogulj, Branko (8x), Greenfeld, Alon (7x), Szerlak, Andrzej (7x), Vaganian, Rafael A (6x), Gulko, Boris (6x), Köstner, Wolfgang (6x), Portisch, Lajos (5x)

8.Bg2 — 5.5% (53 parties)

Ambassadeurs : Girard, Eric (5x), Dubov, Daniil (3x), Lalit Babu M R (2x), Tatai, Stefano (1x), Bobotsov, Milko G (1x), Kindsvogel, Robert (1x), Lindemann, Stefan (1x), Obierak, Wladyslaw (1x)

8.c5 — 0.8% (8 parties)

Ambassadeurs : Le Corre, Alexandre (1x), Balza, Fernando (1x), Rajlich, Iweta (1x), Danielian, Elina (1x), Kosarev, Dmitry (1x), Frolochkin, Vladimir (1x), Jorge Alberto Ortiz Molina (1x), Sulskis, Sarunas (1x)

8.Qd4 — 0.6% (6 parties)

Ambassadeurs : Agrest, Evgenij (2x), Ernst, Thomas (1x), Gdanski, Jacek (1x), Bagheri, Maziar (1x), Idani, Pouya (1x), AlHuwar, Jasem (1x), Sharapov, Yevhen (1x), Dgebuadze, Alexandre (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	8.e4	8.Bg2	8.c5	8.Qd4
<1800	35	97%	—	—	—
1800-2200	221	91%	6%	1%	0%
2200-2600	552	91%	6%	1%	1%
2600+	57	95%	5%	—	—

Évolution par décennie (% des parties)

Décennie	N parties	8.e4	8.Bg2	8.c5	8.Qd4
1950s	2	100%	—	—	—
1970s	46	98%	2%	—	—
1980s	75	100%	—	—	—
1990s	190	96%	3%	—	1%
2000s	199	91%	6%	2%	—
2010s	344	88%	8%	1%	1%
2020s	111	91%	5%	2%	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
8.e4	88%	91%	▲ +3.2%
8.Bg2	8%	5%	▼ -3.9%
8.c5	1%	2%	▲ +0.9%
8.Qd4	1%	0%	▼ -1.2%

Joueurs célèbres

Champions du monde dans cette position

Kramnik, Vladimir — 5 parties
Karpov, Anatoly — 4 parties
Anand, Viswanathan — 3 parties
Tal, Mikhail — 1 partie
Carlsen, Magnus — 1 partie

Parties historiques

8.e4 — 91.8% (888 parties)

1950 — Rossolimo, Nicolas vs Milic, Borislav — 1-0 — Paris FRA
1955 — Taimanov, Mark vs Geller, Efim P. — 1-0 — Moscow RUS
1970 — Furman, Albert vs Gipslis, Aivars — 1-0 — Leningrad RUS
1970 — Portisch, Lajos vs Korchnoi, Viktor — 1/2-1/2 — Belgrade SRB
1970 — Portisch, Lajos vs Korchnoi, Viktor — 1/2-1/2 — Belgrade SRB

8.Bg2 — 5.5% (53 parties)

1972 — Tatai, Stefano vs Bobotsov, Milko G — 1/2-1/2 — Bari ITA
1994 — Hinev, Dimitar vs Wassin, Sergej — 1-0 — Ustron
1994 — Kraschl, Joerg vs Titz, Heimo — 1-0 — AUT-ch Austria
1995 — Berresheim, Helmut vs Boeringer, Armin — 1/2-1/2 — RLP Rp-ch Hachenburg
1996 — Obierak, Wladyslaw vs Goryachkin, Vyacheslav — 1-0 — ?

8.c5 — 0.8% (8 parties)

2002 — Le Corre, Alexandre vs Balza, Fernando — 0-1 — IECG
2003 — Rajlich, Iweta vs Danielian, Elina — 0-1 — Plovdiv BUL
2006 — Kosarev, Dmitry vs Frolochkin, Vladimir — 1/2-1/2 — St Petersburg RUS
2012 — Jorge Alberto Ortiz Molina vs Sulskis, Sarunas — 0-1 — Ortisei ITA
2014 — Harman, Kenneth B vs Rutten, Bram — 1-0 — ICCF

8.Qd4 — 0.6% (6 parties)

1990 — Agrest, Evgenij vs Gdanski, Jacek — 1-0 — Bielsko Biala op
1995 — Agrest, Evgenij vs Ernst, Thomas — 1-0 — Stockholm SWE
2010 — AlHuwar, Jasem vs Sharapov, Yevhen — 0-1 — Dubai UAE
2014 — Bagheri, Maziar vs Idani, Pouya — 0-1 — Mashhad
2016 — Dgebuadze, Alexandre vs Hautot, Stephane — 1/2-1/2 — Buetgenbach BEL

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