A39d — English: Symmetrical, Main Line 7.d4, 8…Qa5

1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.d4 cxd4 8.Nxd4 Qa5 * ○ Trait aux Blancs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plan principal. Exploiter la case forte e4….

Atouts. Les Blancs s'appuient sur une majorité de pions à l'aile_dame (3 contre 2), les cases fortes e4, f4, b5 et d5, un fou actif en g2, la paire de fous et la colonne semi-ouverte d.

Côté adverse. Les fous enfermés en g7 et c8.

En contrepartie. Plusieurs pièces dorment encore (le fou c1 et la tour a1).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plan principal. Exploiter la case forte b4….

Atouts. Les Noirs s'appuient sur une majorité de pions à l'centre (2 contre 1), les cases fortes b4, e5 et f5, la paire de fous et la colonne semi-ouverte c.

Côté adverse. Le fou enfermé en c1.

En contrepartie. Plusieurs pièces dorment encore (le fou c8 et la tour a8).

Plans. ...d6 (Libérer Bc8) ; ...d5 (Rupture) ; ...e6 (Rupture) ; ...e5 (Rupture).

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→g3, h2→g3	● f7→g6, h7→g6
Passés	—	—
Majorité	● aile_dame 3v2	● centre 2v1

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● e4 (2v1), ● f4 (2v0), ● b5 (3v1), ● d5 (3v2)	● b4 (2v0), ● e5 (2v0), ● f5 (2v1)
Cases faibles	—	—
Centre	● d5 (3v2), ● e4 (2v1)	● e5 (2v0)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● d	● c

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bg2	● Bg2 Actif (mob. 6)
Bg7		● Bg7 Enfermé (mob. 2)
Bc8		● Bc8 Non développé (mob. 0)
Paire de fous	● Oui	● Oui
Non développées	2 (● c1, ● a1)	2 (● c8, ● a8)

Sécurité du roi

	♔ Blancs	♚ Noirs
Statut	● Roqué	● Roqué
Droits de roque	—	—

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	semi-ouvert
Ruptures	● c4-c5, ● e2-e3, ● f2-f3	● …d7-d6, ● …d7-d5, ● …e7-e6, ● …e7-e5

Partie
19. European Teams 2013 – Round 2.1 – Esen Baatarsukh – 1/2-1/2 – Andreikin, Dmitry – G52 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. g3 c5 5. Nc3 cxd4 6. Nxd4 O-O 7. Bg2 Nc6 8. O-O Qa5 9. e3 Ne5 10. Nd5 Nxd5
19. European Teams 2013 – Round 5.1 – Erdos, Viktor – 1/2-1/2 – Bacrot, Etienne – G168 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 c5 5. Bg2 cxd4 6. Nxd4 O-O 7. O-O Nc6 8. Nc3 Qa5 9. Nb3 Qh5 10. e4 d6
1939 Buenos Aires ol f-A – Round 14 – Petrov, Vladimir (ENG) – 1-0 – Czerniak, Moshe – G265 1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 Nc6 5. g3 g6 6. Bg2 Bg7 7. O-O O-O 8. Nc3 Qa5 9. Nb3 Qb4 10. c5 Na5
1954 URS Ch, semi final – Round 11 – Tarasov, Vitaly – 0-1 – Gurgenidze, Bukhuti – G100 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 c5 6. O-O cxd4 7. Nxd4 Nc6 8. Nc3 Qa5 9. Nc2 d6 10. e4 Bg4
1954 URS Team Ch – Round 6 – Fridstein, German – 1/2-1/2 – Byvshev, Vasily – G92 1. c4 Nf6 2. Nc3 c5 3. g3 Nc6 4. Bg2 g6 5. Nf3 Bg7 6. d4 cxd4 7. Nxd4 O-O 8. O-O Qa5 9. Nc2 d6 10. e4 Bg4
1957 WchT U26 04th – Round 2.3 – Aaltio, Erkki – 0-1 – Gurgenidze, Bukhuti – G20 1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nc3 O-O 5. d4 c5 6. Nf3 cxd4 7. Nxd4 Nc6 8. O-O Qa5 9. e3 Rb8 10. Nd5 Nxd5
1958 HUN Ch Budapest HUN – Round 2 – Varnusz, Egon – 1/2-1/2 – Bilek, Istvan – G7 1. c4 Nf6 2. Nc3 c5 3. g3 g6 4. Bg2 Nc6 5. Nf3 Bg7 6. d4 O-O 7. O-O cxd4 8. Nxd4 Qa5 9. Nb3 Qh5 10. c5 b6
1959 HUN Ch Budapest HUN – Round 10 – Navarovszky, Laszlo – 1/2-1/2 – Dely, Peter – G41 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O c5 6. c4 Nc6 7. Nc3 cxd4 8. Nxd4 Qa5 9. Ncb5 a6 10. Nb3 Qd8
1960 Leningrad tt – Round 14 – Lloyd, Kenneth – 0-1 – Malich, Burkhard, Dr. – G201 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. c4 O-O 5. O-O c5 6. d4 cxd4 7. Nxd4 Nc6 8. Nc3 Qa5 9. Nb3 Qb4 10. Nd2 d6
1960 URS Ch sf – Round 16 – Uusi, Gunnar – 1/2-1/2 – Gipslis, Aivars – G127 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 c5 6. Nf3 cxd4 7. Nxd4 Nc6 8. O-O Qa5 9. e3 d6 10. Bxc6 bxc6
1961 Baku ch-URS – Round 8 – Bagirov, Vladimir – 1/2-1/2 – Gipslis, Aivars – G77 1. c4 Nf6 2. Nc3 g6 3. d4 Bg7 4. g3 O-O 5. Bg2 c5 6. Nf3 cxd4 7. Nxd4 Nc6 8. O-O Qa5 9. Nc2 d6 10. Bd2 Qh5
1961 CSR Ch – Round 15 – Filip, Miroslav – 1-0 – Marsalek, Josef – G141 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nf3 c5 6. O-O cxd4 7. Nxd4 Nc6 8. Nc3 Qa5 9. Nc2 d6 10. e4 Bg4
1962 Leningrad – Round 3.5 – Lein, Andreas – 1/2-1/2 – Nikolaevsky, Yuri V – G40 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O c5 6. c4 cxd4 7. Nxd4 Nc6 8. Nc3 Qa5 9. Nf3 d6 10. Qb3 a6
1963 It – Round 7 – Szilagyi, Gyorgy Laszlo – 1/2-1/2 – Gipslis, Aivars – G4 1. Nf3 g6 2. c4 Bg7 3. g3 c5 4. Bg2 Nc6 5. Nc3 Nf6 6. O-O O-O 7. d4 cxd4 8. Nxd4 Qa5 9. Nc2 d6 10. Rb1 Be6
1963 Leningrad ch-URS – Round 1 – Spassky, Boris Vasily – 1/2-1/2 – Suetin, Alexey S – G125 1. Nf3 c5 2. c4 Nf6 3. g3 g6 4. Bg2 Bg7 5. O-O O-O 6. d4 cxd4 7. Nxd4 Nc6 8. Nc3 Qa5 9. Nb3 Qb4 10. c5 a5
1964 Amsterdam Interzonal – Round 23 – Smyslov, Vladimir – 1/2-1/2 – Larsen, Benjamin Holsko – G239 1. Nf3 Nf6 2. d4 g6 3. g3 Bg7 4. Bg2 c5 5. c4 Nc6 6. O-O O-O 7. Nc3 cxd4 8. Nxd4 Qa5 9. Nb3 Qh5 10. e4 Qxd1
1965 Chigorin Memorial – Round 10 – Krogius, Nikolai V – 1-0 – Jansa, Vlastimil – G46 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 c5 5. Bg2 cxd4 6. Nxd4 O-O 7. O-O Nc6 8. Nc3 Qa5 9. Nb3 Qh5 10. c5 b6
1965 Mar del Plata – Round 8 – Aguayo Cruz, Ramon Uriel – 0-1 – Bolbochan, J. – G61 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. g3 O-O 5. Bg2 c5 6. Nf3 cxd4 7. Nxd4 Nc6 8. O-O Qa5 9. Nc2 d6 10. h3 Ne5
1965 Sinaia stud ol final – Round 3 – Avner, Uri – 0-1 – Jansa, Vlastimil – G14 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6 6. O-O O-O 7. d4 cxd4 8. Nxd4 Qa5 9. Nc2 d6 10. Nd5 Nxd5
1965 Tbilisi Tbilisi GEO – Round 1 – Kholmov, Ratmir D – 1/2-1/2 – Jansa, Vlastimil – G1 1. c4 c5 2. Nc3 Nc6 3. Nf3 Nf6 4. g3 g6 5. Bg2 Bg7 6. d4 cxd4 7. Nxd4 O-O 8. O-O Qa5 9. Nc2 d6 10. Bd2 Qh5
1967 Havana Armies Ch 4th – Round 15 – Fernandez Bravo, Ciro Angel – 0-1 – Jansa, Vlastimil – G94 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. g3 O-O 5. Bg2 c5 6. O-O Nc6 7. d4 cxd4 8. Nxd4 Qa5 9. Nc2 d6 10. Rb1 Bd7
1968 Budapest – Round 1 – Honfi, K. – 1/2-1/2 – Dely, Peter – G3 1. c4 c5 2. Nc3 Nc6 3. Nf3 Nf6 4. g3 g6 5. Bg2 Bg7 6. O-O O-O 7. d4 cxd4 8. Nxd4 Qa5 9. Nb3 Qh5 10. c5 d6
1968 HUN-URS – Round ? – Umansky, Mikhail – 1/2-1/2 – Adorjan, Andras – G3 1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nf3 O-O 5. O-O c5 6. d4 cxd4 7. Nxd4 Nc6 8. Nc3 Qa5 9. Nb3 Qh5 10. c5 d6
1968 Hungary – Round 1 – Pogats, Jozsef Jr. – 1/2-1/2 – Adorjan, Andras – G19 1. Nf3 c5 2. c4 g6 3. Nc3 Bg7 4. g3 Nc6 5. Bg2 Nf6 6. O-O O-O 7. d4 cxd4 8. Nxd4 Qa5 9. Nc2 Qh5 10. e4 Qxd1
1969 IBM I – Round 13 – Donner, Jan-Hein – 1/2-1/2 – Vasiukov, Evgeni – G51 1. d4 Nf6 2. c4 g6 3. g3 c5 4. Nf3 cxd4 5. Nxd4 Bg7 6. Bg2 O-O 7. Nc3 Nc6 8. O-O Qa5 9. Nc2 Qh5 10. e4 d6
3. GRENKE Chess Classic 2015 – Round 5.2 – Adams, Michael – 1/2-1/2 – Bacrot, Etienne – G18 1. c4 Nf6 2. g3 g6 3. Bg2 c5 4. Nc3 Bg7 5. Nf3 O-O 6. d4 cxd4 7. Nxd4 Nc6 8. O-O Qa5 9. Nb3 Qh5 10. Nd5 d6
3. GRENKE Chess Classic 2015 – Round 7.4 – Baramidze, David – 1/2-1/2 – Caruana, Fabiano – G28 1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O c5 6. d4 cxd4 7. Nxd4 Nc6 8. Nc3 Qa5 9. Nb3 Qh5 10. e4 d6
34. ECC Open 2018 – Round 7.14 – Donchenko, Alexander – 1/2-1/2 – Thybo, Jesper Sondergaard – G207 1. c4 c5 2. g3 Nc6 3. Bg2 g6 4. Nc3 Bg7 5. Nf3 Nf6 6. d4 cxd4 7. Nxd4 O-O 8. O-O Qa5 9. e3 d6 10. Bd2 Qb6
41. Olympiad Open 2014 – Round 4.1 – Radjabov, Teimour – 1/2-1/2 – Bacrot, Etienne – G241 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 c5 5. Bg2 cxd4 6. Nxd4 O-O 7. Nc3 Nc6 8. O-O Qa5 9. e3 d6 10. Bd2 Qa6
41. Olympiad Open 2014 – Round 9.7 – L'Ami, Erwin – 1/2-1/2 – Zhigalko, Andrey – G667 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 c5 5. Bg2 cxd4 6. Nxd4 O-O 7. O-O Nc6 8. Nc3 Qa5 9. Nb3 Qh5 10. c5 d6
42. Olympiad 2016 – Round 9.6 – Giri, Anish – 1/2-1/2 – Navara, David – G663 1. Nf3 Nf6 2. c4 c5 3. Nc3 Nc6 4. g3 g6 5. Bg2 Bg7 6. d4 cxd4 7. Nxd4 O-O 8. O-O Qa5 9. e3 d6 10. Bd2 Qa6
FIDE World Cup 2017 – Round 3.6 – Grischuk, Alexander – 1-0 – Navara, David – G366 1. Nf3 Nf6 2. g3 c5 3. Bg2 g6 4. c4 Bg7 5. d4 cxd4 6. Nxd4 Nc6 7. Nc3 O-O 8. O-O Qa5 9. Nb3 Qh5 10. Nd5 d6
FIDE World Rapid 2014 – Round 10.11 – Adly, Ahmed – 1/2-1/2 – Vachier-Lagrave, Maxime – G209 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. g3 O-O 5. Bg2 c5 6. O-O cxd4 7. Nxd4 Nc6 8. Nc3 Qa5 9. Nb3 Qh5 10. e4 d6
FIDE World Rapid 2014 – Round 8.9 – Laznicka, Viktor – 1/2-1/2 – Vachier-Lagrave, Maxime – G167 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Nf3 O-O 5. Bg2 c5 6. O-O cxd4 7. Nxd4 Nc6 8. Nc3 Qa5 9. e3 d6 10. Qe2 Bg4
GCT Blitz YourNextMove 2016 – Round 14.3 – Topalov, Veselin – 0-1 – Caruana, Fabiano – G68 1. c4 c5 2. Nf3 Nf6 3. g3 Nc6 4. Bg2 g6 5. d4 cxd4 6. Nxd4 Bg7 7. Nc3 O-O 8. O-O Qa5 9. Nb3 Qh5 10. e4 d6
London Chess Classic 2013 – Round 6.1 – Adams, Michael – 1/2-1/2 – Anand, Viswanathan – G3 1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6 5. Nf3 Nf6 6. d4 cxd4 7. Nxd4 O-O 8. O-O Qa5 9. Nc2 d6 10. Bd2 Qh5
Makedonia Palace GP 2013 – Round 7.1 – Ivanchuk, Vasyl – 1/2-1/2 – Grischuk, Alexander – G33 1. Nf3 Nf6 2. c4 c5 3. Nc3 Nc6 4. g3 g6 5. Bg2 Bg7 6. O-O O-O 7. d4 cxd4 8. Nxd4 Qa5 9. Nb3 Qh5 10. Bf3 Qh3
SportAccord Blitz 2014 – Round 30.4 – Gelfand, Boris – 1-0 – Aronian, Levon – G233 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 c5 6. Nc3 cxd4 7. Nxd4 Nc6 8. O-O Qa5 9. Nc2 d6 10. e4 Bg4
SportAccord Blitz 2014 – Round 4.3 – Aronian, Levon – 1/2-1/2 – Bacrot, Etienne – G27 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. g3 c5 5. Bg2 Nc6 6. d4 cxd4 7. Nxd4 O-O 8. O-O Qa5 9. Nb3 Qh5 10. c5 a5
SportAccord Blitz Men 2013 – Round 13.3 – Wang, Yue(SH) – 0-1 – Le, Quang Liem – G96 1. c4 g6 2. g3 Bg7 3. Bg2 c5 4. Nc3 Nf6 5. Nf3 Nc6 6. d4 cxd4 7. Nxd4 O-O 8. O-O Qa5 9. Nb3 Qh5 10. Nd5 d6
Superbet Blitz 2023 – Round 11.1 – Giri, Anish – 1-0 – Duda, Jacob – G51 1. c4 Nf6 2. g3 c5 3. Bg2 Nc6 4. Nc3 g6 5. Nf3 Bg7 6. O-O O-O 7. d4 cxd4 8. Nxd4 Qa5 9. e3 d6 10. Bxc6 bxc6
World Blitz 2015 – Round 9.8 – Tomashevsky, Evgeny – 0-1 – Radjabov, Teimour – G589 1. c4 c5 2. Nf3 Nc6 3. Nc3 Nf6 4. g3 g6 5. Bg2 Bg7 6. d4 cxd4 7. Nxd4 O-O 8. O-O Qa5 9. e3 d6 10. Nb3 Qh5
World Blitz 2016 – Round 20.19 – Pantsulaia, Levan – 0-1 – Khusnutdinov, Rafael – G784 1. Nf3 c5 2. c4 Nf6 3. Nc3 Nc6 4. g3 g6 5. Bg2 Bg7 6. d4 cxd4 7. Nxd4 O-O 8. O-O Qa5 9. Nb3 Qh5 10. c5 a5
World Blitz 2017 – Round 8.28 – Fedoseev, Vladimir – 1-0 – Duda, Jan-Krzysztof – G409 1. Nf3 Nf6 2. g3 g6 3. c4 Bg7 4. Bg2 O-O 5. Nc3 c5 6. d4 cxd4 7. Nxd4 Nc6 8. O-O Qa5 9. e3 d6 10. Bd2 Bd7
World Blitz 2018 – Round 10.31 – Dubov, Daniil – 1/2-1/2 – Khusnutdinov, Rustam – G593 1. Nf3 Nf6 2. g3 c5 3. c4 Nc6 4. Bg2 g6 5. O-O Bg7 6. d4 cxd4 7. Nxd4 O-O 8. Nc3 Qa5 9. e3 Ne5 10. Nb3 Qd8
World Blitz 2018 – Round 12.27 – Yilmaz, Mustafa (34) – 0-1 – Indjic, Aleksandar – G710 1. Nf3 c5 2. c4 Nc6 3. Nc3 Nf6 4. g3 g6 5. Bg2 Bg7 6. d4 cxd4 7. Nxd4 O-O 8. O-O Qa5 9. e3 d6 10. Qd2 Bd7
World Blitz 2019 – Round 9.40 – Fridman, Daniel – 0-1 – Sadhwani, Raunak – G624 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 c5 5. c4 cxd4 6. Nxd4 O-O 7. Nc3 Nc6 8. O-O Qa5 9. e3 d6 10. Bd2 Qb6
World Blitz 2021 – Round 19.6 – Oparin, Grigoriy – 0-1 – Duda, Jacob – G1137 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. c4 c5 5. d4 cxd4 6. Nxd4 O-O 7. Nc3 Nc6 8. O-O Qa5 9. e3 d6 10. Bd2 Bd7
World Blitz 2023 – Round 10.28 – Vakhidov, Jakhongir – 1-0 – Grebnev, Aleksey – G584 1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6 5. Nf3 Nf6 6. d4 cxd4 7. Nxd4 O-O 8. O-O Qa5 9. Nb3 Qh5 10. Nd5 d6
World Blitz 2023 – Round 18.49 – Iturrizaga Bonelli, Eduardo – 1-0 – Grebnev, Aleksey – G1046 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. g3 g6 5. Bg2 Bg7 6. O-O O-O 7. d4 cxd4 8. Nxd4 Qa5 9. e3 d6 10. Bd2 Qb6
World Rapid 2016 – Round 5.11 – Dreev, Aleksey – 1/2-1/2 – Khusnutdinov, Rafael – G169 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 c5 5. c4 cxd4 6. Nxd4 O-O 7. Nc3 Nc6 8. O-O Qa5 9. e3 Ne5 10. Nb3 Qc7
Zurich CC Blitz 2014 – Round 1.3 – Aronian, Levon – 1-0 – Anand, Viswanathan – G3 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. g3 g6 5. Bg2 Bg7 6. d4 cxd4 7. Nxd4 O-O 8. O-O Qa5 9. Nb3 Qh5 10. c5 b6

A39d — Symmetrical Main Line

1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.d4 cxd4 8.Nxd4 Qa5

Les coups candidats

9.Nb3 — 46.2% (548 parties)

Ambassadeurs : Pantsulaia, Levan (6x), Banusz, Tamas (4x), Vakhidov, Jakhongir (4x), Xu, Minghui (4x), Fedder, Steen (3x), Marholev, Dimitar (3x), Matlakov, Maxim (3x), Almasi, Zoltan (3x)

9.e3 — 23.9% (284 parties)

Ambassadeurs : Bacrot, Etienne (7x), Indjic, Aleksandar (3x), Barseghyan, Armen Ar. (3x), Gurgenidze, Bukhuti (2x), Annageldyev, Orazly (2x), Andreikin, Dmitry (2x), Romanishin, Oleg M (2x), Meier, Georg (2x)

9.Nc2 — 22.1% (262 parties)

Ambassadeurs : Jansa, Vlastimil (3x), Gipslis, Aivars (2x), Giertz, Niklaus (2x), Keres, Paul (1x), Richard Pruun (1x), Kholmov, Ratmir D (1x), Avner, Uri (1x), Smiltiner, Shlomo (1x)

9.Nxc6 — 2.2% (26 parties)

Ambassadeurs : Kieser, Ernst (1x), Liang, Jinrong (1x), Nazarenus, Olaf (1x), Schluchter, Steffen (1x), Bento, Antonio (1x), Uchoa, Valdir (1x), Mas, Ioana (1x), Paasikangas, Johanna (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	9.Nb3	9.e3	9.Nc2	9.Nxc6
<1800	14	43%	21%	7%	14%
1800-2200	298	40%	23%	21%	4%
2200-2600	665	50%	23%	24%	1%
2600+	97	46%	42%	9%	—

Évolution par décennie (% des parties)

Décennie	N parties	9.Nb3	9.e3	9.Nc2	9.Nxc6
1930s	1	100%	—	—	—
1940s	1	—	—	100%	—
1950s	10	30%	20%	30%	—
1960s	24	25%	8%	54%	—
1970s	31	61%	3%	29%	—
1980s	38	58%	13%	18%	3%
1990s	108	42%	23%	22%	6%
2000s	111	39%	17%	30%	4%
2010s	674	50%	25%	19%	1%
2020s	189	37%	32%	23%	3%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
9.Nb3	50%	37%	▼ -13.9%
9.e3	25%	32%	▲ +7.2%
9.Nc2	19%	23%	▲ +3.6%
9.Nxc6	1%	3%	▲ +1.2%

Joueurs célèbres

Champions du monde dans cette position

Anand, Viswanathan — 2 parties
Ding, Liren — 2 parties
Smyslov, Vladimir — 1 partie
Tal, Mikhail — 1 partie
Ju, Wenjun — 1 partie

Parties historiques

9.Nb3 — 46.2% (548 parties)

1939 — Petrov, Vladimir (ENG) vs Czerniak, Moshe — 1-0 — Buenos Aires ARG
1956 — Buslaev, Aleksander vs Gurgenidze, Bukhuti — 1/2-1/2 — Georgia
1958 — Varnusz, Egon vs Bilek, Istvan — 1/2-1/2 — HUN-ch Budapest HUN
1959 — Forintos, Gyozo V vs Gipslis, Aivars — 1/2-1/2 — Budapest HUN
1960 — Lloyd, Kenneth vs Malich, Burkhard, Dr. — 0-1 — Leningrad RUS

9.e3 — 23.9% (284 parties)

1957 — Aaltio, Erkki vs Gurgenidze, Bukhuti — 0-1 — Reykjavik ISL
1958 — Zilber, Israel vs Gurgenidze, Bukhuti — 1-0 — Rostov on Don
1960 — Uusi, Gunnar vs Gipslis, Aivars — 1/2-1/2 — Vilnius LTU
1965 — Kolbak, Jens vs Jansa, Vlastimil — 1/2-1/2 — Sinaia
1977 — Kaspret, Guido vs Rivas Pastor, Manuel — 1/2-1/2 — Innsbruck AUT

9.Nc2 — 22.1% (262 parties)

1945 — Keres, Paul vs Richard Pruun — 1-0 — Tallinn (URS)
1950 — Bobekov, Radko vs Piskov, Kamen Penev — 1/2-1/2 — Sofia BUL
1954 — Fridstein, German vs Byvshev, Vasily — 1/2-1/2 — Riga LAT
1954 — Tarasov, Vitaly vs Gurgenidze, Bukhuti — 0-1 — Erevan ARM
1961 — Bagirov, Vladimir vs Gipslis, Aivars — 1/2-1/2 — Baku ch-URS

9.Nxc6 — 2.2% (26 parties)

1982 — Kieser, Ernst vs Liang, Jinrong — 0-1 — Lugano SUI
1990 — Sievilainen, Tuomo vs Lahti, Jouko — 1/2-1/2 — Kuopio Kalakukko
1992 — Mas, Ioana vs Paasikangas, Johanna — 0-1 — Wch U18 Girls
1995 — Mora Martinez, Luis vs Martinez Alcazar, Jesus — 0-1 — Burjasot
1996 — Nazarenus, Olaf vs Schluchter, Steffen — 1-0 — Pfalz-chB Landau

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