A30 — English Opening: Symmetrical Variation, Hedgehog Defense

1. c4 c5 2. Nf3 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O ○ Trait aux Blancs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Atouts. Les Blancs s'appuient sur une majorité de pions à l'aile_dame (3 contre 2), les cases fortes f4, b5, e5 et g5, la paire de fous et la colonne semi-ouverte d.

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

Plans. Rd1 (Tour sur colonne semi-ouverte d,) ; Bg5 (Clouer Nf6) ; Tour sur colonne d ; h3 (Empêcher ...Bg4).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Atouts. Les Noirs s'appuient sur une majorité de pions à l'centre (2 contre 1), la case forte c5, un avant-poste en c5, des fous actifs en b7 et e7, la paire de fous et la colonne semi-ouverte c.

Côté adverse. Les fous enfermés en c1 et g2.

En contrepartie. Plusieurs pièces dorment encore (le cavalier b8 et la tour a8).

Plans. ...Nc6 (Développer Nb8) ; ...Bg4 (Clouer Nf3) ; ...d6 (Rupture) ; ...d5 (Rupture) ; ...e5 (Rupture).

Avantages

Faiblesses adverses

Diagonale active

Plans

Base Masters : Blancs 34.1%, Nulles 49.1%, Noirs 16.8%.

Coups candidats

auto

Analyse coup par coup — 10 demi-coups commentés

1.c4 Avancée centrale — contrôle b5, d5. Prépare d4, Nc3, e4.
1…c5 Avancée centrale — contrôle b4, d4. Prépare Nc6, d5.
2.Nf3 Contrôle d4, d5, e5.
2…Nf6 Contrôle d4, e4, d5.
3.Nc3 Contrôle d4, e4, d5, e5.
3…e6 Avancée centrale — contrôle d5, f5. Prépare d5, Be7, Bd6.
4.g3 Prépare le fianchetto du Fou (Bg2).
4…b6 Prépare le fianchetto du Fou (Bb7).
5.Bg2 Contrôle d4, e4, f4, d5.
5…Bb7 Contrôle d4, e4, d5, f5.

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→g3, h2→g3	● a7→b6, d7→e6, f7→e6
Passés	—	—
Majorité	● aile_dame 3v2	● centre 2v1

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● f4 (3v0), ● b5 (2v0), ● e5 (2v0), ● g5 (2v0)	● c5 (2v1)
Cases faibles	● e4	—
Centre	● d4 (1v0), ● e5 (2v0)	—

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● d	● c

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bg2	● Bg2 Enfermé (mob. 2)
Bb7		● Bb7 Actif (mob. 6)
Be7		● Be7 Actif (mob. 4)
Paire de fous	● Oui	● Oui
Non développées	2 (c1, a1)	2 (b8, 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	● …d7-d6, ● …d7-d5, ● …e6-e5

Partie
10. Tal Mem 2016 – Round 1.2 – Svidler, Peter – 1/2-1/2 – Kramnik, Vladimir – G2 1. c4 e6 2. Nc3 c5 3. Nf3 Nf6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 d6 10. Bg5 Nc6
10. Tal Mem 2016 – Round 3.2 – Nepomniachtchi, Ian – 1-0 – Kramnik, Vladimir – G10 1. c4 e6 2. Nc3 c5 3. Nf3 Nf6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 d6 10. Bg5 Nc6
1953 Candidats Tournament – Round 12 – Gligoric, Sofija – 0-1 – Smyslov, Vladimir – G73 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Nc6 10. Qf4 Qb8
1953 Candidats Tournament – Round 14 – Petrosian, Tigran V – 1/2-1/2 – Geller, Efim P – G85 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Nc6 10. Qf4 Qb8
1954 Bucharest – Round 2 – Filip, Marius Liviu – 1/2-1/2 – O'Kelly de Galway, Alberic – G27 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Nc6 10. Qf4 Qb8
1954 Zuerich Zurich SUI – Round 5 – Trifunovic, Petar – 1/2-1/2 – Euwe, Max – G14 1. Nf3 Nf6 2. c4 e6 3. Nc3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Bf4 Nc6 10. Qd2 Na5
1955 Ljubljana – Round 5 – Stahlberg, Gideon – 1/2-1/2 – Pirc, Vasja – G38 1. c4 Nf6 2. Nc3 c5 3. Nf3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Nc6 10. Qf4 Qb8
1958 Argentina – Round 14 – Bolbochan, J. – 1/2-1/2 – Garcia Vera, Romeo – G109 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Nc6 10. Qf4 Na5
1958 Munich olm fin-A – Round 5 – Darga, Klaus – 1/2-1/2 – Djurasevic, Bozidar – G40 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Nc6 10. Qf4 Qb8
1958 Munich olm fin-A – Round 7 – Rejfir, Josef – 1/2-1/2 – Milev, Zdravko – G62 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Qc8 10. Bf4 Rd8
1959 Asztalos Memorial – Round 12 – Kluger, Gyula – 1/2-1/2 – Beni, Alfred – G55 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 d6 10. b3 Nbd7
1959 HUN Ch 15th – Round 4 – Barcza, Gedeon – 1-0 – Hevizi, Laszlo Dr – G12 1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. O-O e6 5. c4 c5 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 O-O 9. b3 Na6 10. Bb2 Nc5
1962 Stockholm Interzonal – Round 22 – Petrosian, Tigran V – 1-0 – German, Eugenio – G200 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Qc8 10. Qf4 d5
1962 Stockholm Interzonal – Round 8 – Korchnoi, Viktor – 1-0 – Filip, Marius Liviu – G68 1. c4 Nf6 2. Nc3 c5 3. g3 e6 4. Nf3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Qc8 10. e4 d6
1963 Zonal Enschede NED – Round 1 – Lengyel, Laszlo – 1/2-1/2 – Filip, Marius Liviu – G1 1. c4 c5 2. Nf3 Nf6 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 O-O 9. b3 d5 10. Ne5 Bc5
1964 Tel Aviv olm prel – Round 7 – Rodriguez Gonzales, Jesus – 1/2-1/2 – Mititelu, Gheorghe – G284 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. O-O c5 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 O-O 9. Bf4 Nc6 10. Qd2 Na5
1965 Asztalos Memorial 8th – Round 5 – Lengyel, Levente – 1/2-1/2 – Kluger, Gyula – G28 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Nc6 10. Qf4 Qb8
1966 OWL Ch – Round 8 – Speer, Albrecht – 1-0 – Diekmann, Hans-Joachim, Dr. – G27 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Nc6 10. Qf4 Rc8
1966 Rio Hondo zt – Round 16 – Panno, Oscar – 1-0 – Fabian Godoy, Dhyago Fabricio – G101 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. O-O c5 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Nc6 10. Qf4 d6
1967 IBM – Round 10 – Portisch, Lajos – 1/2-1/2 – Pachman, Ludek – G35 1. Nf3 c5 2. c4 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Nc6 10. Qf4 Qb8
1967 URS Team Ch – Round 1 – Kondratiev, Pavel E – 0-1 – Bokuchava, Alexander – G5 1. c4 c5 2. Nc3 Nf6 3. g3 e6 4. Nf3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. e4 d6 10. Rd1 Qc8
1967 Venice – Round 8 – Lengyel, Levente – 1/2-1/2 – Pachman, Ludek – G28 1. c4 Nf6 2. Nf3 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Nc6 10. Qf4 Qb8
1967 Zinnowitz – Round 1 – Malich, Burkhard, Dr. – 1-0 – Schoeneberg, Manfred – G12 1. d4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 c5 5. O-O cxd4 6. Qxd4 e6 7. c4 Be7 8. Nc3 O-O 9. e4 Nc6 10. Qe3 d6
1968 Skopje/Ohrid – Round 2 – Gheorghiu, Florin – 1/2-1/2 – Ilievski, Borce – G9 1. c4 Nf6 2. Nc3 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 c5 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Nc6 10. Qf4 a6
1974 Manila – Round 3 – Quinteros, Miguel Angel – 0-1 – Ljubojevic, Ljubomir – G48 1. d4 Nf6 2. c4 e6 3. g3 c5 4. Nf3 b6 5. Bg2 Bb7 6. O-O Be7 7. Nc3 cxd4 8. Qxd4 O-O 9. Rd1 d6 10. b3 Nbd7
1975 Portoroz/Ljubljana – Round 13 – Portisch, Lajos – 1/2-1/2 – Furman, Slavomir – G112 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 d6 10. Bg5 Nbd7
20. European Teams 2015 – Round 2.5 – Banikas, Hristos – 1/2-1/2 – Tomashevsky, Evgeny – G90 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Qc8 10. Bf4 Rd8
20. European Teams 2015 – Round 6.4 – Meier, Georg – 1/2-1/2 – Sargissian, Gabriel – G264 1. c4 Nf6 2. Nf3 c5 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 d6 10. Bg5 Nc6
2026 Tata Steel Chess Masters - Round 11.4 - Van Foreest, Jorden - 1/2-1/2 - Abdusattorov, Nodirbek - G74 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 d6 10. Bg5 Nbd7
42. Olympiad 2016 – Round 7.14 – Stupak, Kacper – 1/2-1/2 – Bluebaum, Matthias – G472 1. c4 Nf6 2. Nc3 c5 3. Nf3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Bf4 Nc6 10. Qd2 Na5
Amber Blindfold 2007 – Round 6 – Kramnik, Vladimir – 1-0 – Aronian, Levon – G17 1. Nf3 Nf6 2. c4 b6 3. g3 c5 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 d6 10. Bg5 Nbd7
Amber Rapidplay 2000 – Round 7 – Lautier, Joel – 0-1 – Kramnik, Vladimir – G31 1. c4 c5 2. Nf3 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Nc6 10. Qf4 Qb8
Brussels 1987 – Round 1 – Timman, Jan H – 1/2-1/2 – Tal, Mikhail – G3 1. c4 e6 2. Nc3 c5 3. Nf3 Nf6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Nc6 10. Qf4 Qb8
European Club Cup 2015 – Round 5.2 – Nakamura, Hikaru – 1/2-1/2 – Jakovenko, Dmitry – G88 1. c4 Nf6 2. Nc3 c5 3. Nf3 e6 4. g3 b6 5. Bg2 Bb7 6. d4 cxd4 7. Qxd4 Be7 8. O-O O-O 9. Rd1 d6 10. e4 Nbd7
FIDE World Cup 2019 – Round 1.2 – Martinez Alcantara, Jose Eduardo – 0-1 – Jakovenko, Dmitry – G66 1. c4 c5 2. Nf3 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 d6 10. b3 Nbd7
GCT Blitz Paris 2021 – Round 18.3 – Radjabov, Teimour – 0-1 – Kramnik, Vladimir – G85 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. b3 d6 10. Ba3 Na6
GCT Rapid Paris 2016 – Round 9.4 – So, Wesley – 1-0 – Fressinet, Laurent – G44 1. c4 Nf6 2. Nc3 c5 3. g3 e6 4. Nf3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Qc8 10. Bf4 Rd8
Hoogovens 1978 – Round 5 – Korchnoi, Viktor – 1/2-1/2 – Andersson, Ulf 1949 – G23 1. c4 e6 2. Nc3 Nf6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. e4 d6 10. Rd1 a6
Milaan m sf 1975 – Round 3 – Karpov, Anatoly – 1/2-1/2 – Petrosian, Tigran V. – G3 1. c4 Nf6 2. Nc3 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O c5 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Nc6 10. Qf4 Qb8
Moskou ch-URS 1988 – Round 1 – Karpov, Anatoly – 1-0 – Smirin, Ilia – G63 1. Nf3 Nf6 2. c4 b6 3. g3 Bb7 4. Bg2 e6 5. d4 c5 6. O-O cxd4 7. Qxd4 Be7 8. Nc3 O-O 9. Rd1 d6 10. Bg5 Nc6
Niksic 1983 – Round 3 – Ljubojevic, Ljubomir – 1/2-1/2 – Andersson, Ulf 1949 – G24 1. c4 e6 2. Nc3 c5 3. Nf3 Nf6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Nc6 10. Qf4 Qb8
Sharjah Grand Prix 2017 – Round 1.3 – Nakamura, Hikaru – 1/2-1/2 – Jakovenko, Dmitry – G3 1. c4 Nf6 2. Nc3 c5 3. Nf3 e6 4. g3 b6 5. Bg2 Bb7 6. d4 cxd4 7. Qxd4 Be7 8. O-O O-O 9. Rd1 d6 10. b3 Nbd7
Tashkent FIDE GP 2014 – Round 8.1 – Giri, Anish – 1/2-1/2 – Jakovenko, Dmitry – G43 1. c4 Nf6 2. Nc3 c5 3. g3 e6 4. Nf3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 d6 10. Bg5 Nc6
Thessaloniki olm 1988 – Round 3 – Panno, Oscar – 0-1 – Karpov, Anatoly – G20 1. Nf3 Nf6 2. c4 e6 3. Nc3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Nc6 10. Qf4 Qc8
World Blitz 2015 – Round 10.29 – Demuth, Adrien – 1/2-1/2 – Ponkratov, Pavel – G613 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. O-O c5 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 O-O 9. b3 d6 10. Ba3 Na6
World Blitz 2017 – Round 17.28 – Pantsulaia, Levan – 1-0 – Grigoriants, Sergey – G884 1. Nf3 c5 2. c4 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Nc6 10. Qf4 Qb8
World Blitz 2018 – Round 17.11 – Grischuk, Alexander – 1-0 – Predke, Alexandr – G987 1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. O-O e6 5. c4 c5 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Nc6 10. Qf4 Qb8
World Rapid 2016 – Round 1.12 – Agdestein, Simen – 0-1 – Grischuk, Alexander – G4 1. c4 c5 2. Nc3 Nf6 3. g3 e6 4. Nf3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. e4 d6 10. Rd1 Nbd7
World Rapid 2016 – Round 10.8 – Pantsulaia, Levan – 0-1 – Grischuk, Alexander – G403 1. Nf3 c5 2. c4 Nf6 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Qc8 10. e4 d6
XVI Ciudad de Linares 99 1999 – Round 14 – Kramnik, Vladimir – 1/2-1/2 – Leko, Peter – G38 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 O-O 9. Rd1 Nc6 10. Qf4 Qb8

A30s — Symmetrical Hedgehog

1.c4 c5 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.d4 cxd4 8.Qxd4 O-O

Eval: [+0.31]

Les coups candidats

9.Rd1 — 66.7% (965 parties)

Ambassadeurs : Andersson, Ulf (10x), Edwards, K. E. D. G.. (8x), Lysyj, Igor (7x), Anastasian, Ashot (5x), Spraggett, Kevin (5x), Moujan, Pablo Miguel (5x), Giardelli, Sergio C. (4x), Giorgadze, Tamaz (4x)

9.e4 — 10.0% (145 parties)

Ambassadeurs : Gligoric, Svetozar (4x), Uhlmann, Wolfgang (4x), Korchnoi, Viktor (3x), Ornstein, Axel (3x), Huebner, Robert (2x), Loginov, Valery A (2x), Temirbayev, Serikbay (2x), Gipslis, Aivars (2x)

9.b3 — 9.5% (138 parties)

Ambassadeurs : Barcza, Gedeon (3x), Andersson, Ulf (2x), Garcia, Luis E. (2x), Cardoso, Cicero Assuncao Jr (2x), Tonndorf, Matthias (2x), Lengyel, Laszlo (1x), Filip, Marius Liviu (1x), Hevizi, Laszlo Dr (1x)

9.Bg5 — 7.1% (102 parties)

Ambassadeurs : Freisler, Pavel (3x), Konopka, Michal (2x), Vlaovic, Djordje (2x), Sorensen, Torben (2x), Pergel, Laszlo (2x), Obolenskikh, Dmitry (2x), Sanchez, Gabriel (1x), Kasa, Richard (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	9.Rd1	9.e4	9.b3	9.Bg5
<1800	9	56%	33%	11%	—
1800-2200	308	63%	14%	12%	5%
2200-2600	923	68%	8%	9%	8%
2600+	70	79%	3%	3%	10%

Évolution par décennie (% des parties)

Décennie	N parties	9.Rd1	9.e4	9.b3	9.Bg5
1920s	1	—	—	—	—
1950s	13	85%	—	8%	—
1960s	21	57%	33%	5%	—
1970s	82	62%	20%	11%	1%
1980s	117	63%	12%	15%	7%
1990s	176	66%	12%	11%	6%
2000s	294	64%	10%	13%	7%
2010s	588	70%	7%	6%	9%
2020s	154	66%	11%	9%	6%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
9.Rd1	70%	66%	▼ -4.3%
9.e4	7%	11%	▲ +4.1%
9.b3	6%	9%	▲ +2.6%
9.Bg5	9%	6%	▼ -2.5%

Joueurs célèbres

Champions du monde dans cette position

Kramnik, Vladimir — 6 parties
Karpov, Anatoly — 3 parties
Smyslov, Vladimir — 2 parties
Karpov, Aleksandr — 2 parties
Euwe, Max — 1 partie
Tal, Mikhail — 1 partie
Carlsen, Magnus — 1 partie
Ju, Wenjun — 1 partie

Parties historiques

9.Rd1 — 66.7% (965 parties)

1953 — Petrosian, Tigran V. vs Geller, Efim P. — 1/2-1/2 — Zurich SUI
1953 — Gligoric, Sofija vs Smyslov, Vladimir — 0-1 — Zurich SUI
1954 — Filip, Marius Liviu vs O'Kelly de Galway, Alberic — 1/2-1/2 — Bucharest ROU
1955 — Stahlberg, Gideon vs Pirc, Vasja — 1/2-1/2 — Ljubljana
1958 — Rejfir, Josef vs Milev, Zdravko — 1/2-1/2 — Munich GER

9.e4 — 10.0% (145 parties)

1963 — Book, Eero vs Uusi — 1-0 — Tartu EST-FIN
1964 — Korchnoi, Viktor vs Kholmov, Ratmir D — 0-1 — Moscow RUS
1967 — Kondratiev, Pavel E vs Bokuchava, Alexander — 0-1 — Moscow RUS
1967 — Korchnoi, Viktor vs Gipslis, Aivars — 1-0 — Tallinn zt plof
1967 — Malich, Burkhard, Dr. vs Schoeneberg, Manfred — 1-0 — Zinnowitz GER

9.b3 — 9.5% (138 parties)

1959 — Barcza, Gedeon vs Hevizi, Laszlo Dr — 1-0 — Budapest HUN
1963 — Lengyel, Laszlo vs Filip, Marius Liviu — 1/2-1/2 — Zonal Enschede NED
1971 — Barcza, Gedeon vs Keres, Paul Petrovich — 1/2-1/2 — Tallinn Tallinn EST
1975 — Barcza, Gedeon vs Pritchett, Craig W — 1-0 — Decin CZE
1976 — Garcia, Luis E. vs Panno, Oscar — 1/2-1/2 — Bogota COL

9.Bg5 — 7.1% (102 parties)

1978 — Vadasz, Laszlo vs Fernandez Gonzalez, Juan Alfonso — 1-0 — Budapest HUN
1981 — Sanchez, Gabriel vs Kasa, Richard — 1-0 — Palo Alto
1983 — Schandorff, Lars vs Kristiansen, Jens — 1/2-1/2 — Copenhagen DEN
1987 — Gulko, Boris vs Sherzer, Alex — 1-0 — New York, NY USA
1988 — Konopka, Michal vs Riha, Vaclav — 1-0 — Czechoslovakia

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