A30 — English Opening: Symmetrical Variation, Hedgehog Defense

1. c4 Nf6 2. Nc3 c5 3. g3 e6 4. Nf3 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 e4, f4, b5, e5 et g5, la paire de fous et la colonne semi-ouverte d.

Côté adverse. Le fou enfermé en b7 et le roi resté au centre.

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

Plans. Qf4 (Centraliser la dame,) ; Bg5 (Clouer Nf6) ; Tour sur colonne d.

♚ 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), les cases fortes b4 et c5, un avant-poste en c5, un fou actif en e7, la paire de fous et la colonne semi-ouverte c.

Côté adverse. Les fous enfermés en c1 et g2.

En contrepartie. Le roi n'est pas encore à l'abri et plusieurs pièces dorment encore (les tours a8 et h8).

Plans. O-O (Mettre le roi en sécurité, connecter les tours) ; ...Bg4 (Clouer Nf3) ; ...d6 (Rupture) ; ...d5 (Rupture) ; ...e5 (Rupture).

Avantages

Faiblesses adverses

Diagonale active

Plans

Base Masters : Blancs 39.7%, Nulles 49.2%, Noirs 11.1%.

Coups candidats

auto

Analyse coup par coup — 10 demi-coups commentés

1.c4 Avancée centrale — contrôle b5, d5. Prépare d4, Nc3, e4.
1…Nf6 Contrôle e4, d5.
2.Nc3 Contrôle e4, d5.
2…c5 Avancée centrale — contrôle b4, d4. Prépare Nc6, d5.
3.g3 Prépare le fianchetto du Fou (Bg2).
3…e6 Avancée centrale — contrôle d5, f5. Prépare d5, Be7, Bd6.
4.Nf3 Contrôle d4, e4, f4, d5.
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	● e4 (2v1), ● f4 (3v0), ● b5 (2v0), ● e5 (2v1), ● g5 (2v0)	● b4 (2v0), ● c5 (2v1)
Cases faibles	—	—
Centre	● d5 (3v2), ● e4 (2v1), ● e5 (2v1)	—

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 Enfermé (mob. 2)
Be7		● Be7 Actif (mob. 5)
Paire de fous	● Oui	● Oui
Non développées	2 (c1, a1)	2 (a8, h8)

Sécurité du roi

	♔ Blancs	♚ Noirs
Statut	● Roqué	● Au centre !
Droits de roque	—	O-O / O-O-O

Thèmes

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

Partie
1953 Zagreb – Round 15 – Janosevic, Dragoljub – 0-1 – Nedeljkovic, Srecko M – G119 1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. O-O c5 5. c4 e6 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 Qb8
1954 Gorki ch22-SU sf – Round 1 – Geller, Efim P – 1-0 – Vladimirov, Boris T – G3 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qd2 Na5 10. b3 d5
1955 Gothenburg Interzonal – Round 5 – Geller, Efim P – 1/2-1/2 – Keres, Paul Petrovich – G42 1. c4 Nf6 2. Nf3 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qd2 Na5 10. b3 d5
1956 Alekhine Memorial – Round 1 – Najdorf, Miguel – 1-0 – Unzicker, Wolfgang – G11 1. c4 Nf6 2. Nf3 e6 3. g3 b6 4. Bg2 Bb7 5. O-O c5 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 Qb8
1956 Budapest Szikra – Round ? – Barcza, Gedeon – 1-0 – Portisch, Lajos – G39 1. Nf3 Nf6 2. c4 c5 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 Rc8 10. Rd1 O-O
1956 Candidats Tournament – Round 16 – Panno, Oscar – 1/2-1/2 – Petrosian, Tigran V – G77 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. O-O c5 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 Qb8
1956 Dresden – Round 7 – Kholmov, Ratmir D – 1/2-1/2 – Pachman, Ludek – 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 Nc6 9. Qf4 O-O 10. Rd1 Qb8
1956 Hastings5657 – Round 2 – Szabo, Laszlo – 1/2-1/2 – O'Kelly, Albéric de Galway – G6 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 Qb8
1956 Leningrad ch-URS – Round 1 – Simagin, Vladimir – 0-1 – Antoshin, Vladimir S – G7 1. c4 c5 2. Nc3 e6 3. Nf3 Nf6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. b3 a6
1957 EU Team Ch – Round 2 – Pachman, Ludek – 1-0 – Matanovic, Aleksandar – G14 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 Qb8
1957 HUN Ch Budapest HUN – Round ? – Lengyel, Levente – 1/2-1/2 – Kluger, Gyula – G11 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 Qb8
1958 Buenos Aires V – Round 4 – Sanguinetti, Raul – 1-0 – Bolbochan, J. – 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 Nc6 9. Qf4 O-O 10. Rd1 Qb8
1958 Haifa/Tel Aviv – Round 11 – Rosenberg, Arie – 1/2-1/2 – Porath, Yosef – G59 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 Qb8 10. Rd1 O-O
1958 Haifa/Tel Aviv – Round 4 – Rosenberg, Arie – 1/2-1/2 – Szabo, Laszlo – G20 1. c4 Nf6 2. Nc3 c5 3. Nf3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 Qb8
1958 Portoroz Interzonal – Round 18 – Olafsson, Fridrik – 1/2-1/2 – Tal, Mikhail – G169 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 Qb8
1958 Torneo de las Americas 1st – Round 17 – Panno, Oscar – 1/2-1/2 – Lombardy, William J – G76 1. c4 Nf6 2. Nf3 c5 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 Qc8
1959 Argentina – Round 4 – Incutto, Carlos – 1-0 – Abraira Rodriguez, Alicia – G19 1. d4 Nf6 2. Nf3 e6 3. c4 b6 4. g3 Bb7 5. Bg2 c5 6. O-O Be7 7. Nc3 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. b3 d5
1959 Asztalos Memorial – Round 6 – Portisch, Lajos – 1-0 – Kluger, Gyula – G25 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 Qb8
1959 Hoogovens – Round 3 – Olafsson, Fridrik – 1/2-1/2 – O'Kelly, Albéric de Galway – 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 Nc6 9. Qf4 O-O 10. Rd1 Qb8
1959 Mar del Plata – Round 6 – Pachman, Ludek – 1-0 – Bolbochan, Jacobo – G70 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 Qb8
1959 Marianske Lazne – Round 13 – Kozma, Julius – 1-0 – Glass, Eduard – G87 1. c4 Nf6 2. Nf3 e6 3. g3 b6 4. Bg2 Bb7 5. O-O c5 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 d6 10. Rd1 a6
1961 Baku ch-URS – Round 16 – Vladimirov, Boris T – 1-0 – Khasin, Abram – G146 1. c4 e6 2. Nf3 c5 3. g3 b6 4. Bg2 Bb7 5. O-O Nf6 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 Qb8
1961 Budapest ch-HUN – Round 1 – Lengyel, Laszlo – 1/2-1/2 – Kluger, Gyula – G15 1. c4 Nf6 2. Nc3 c5 3. g3 e6 4. Nf3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 Qb8
1961 Zevenaar – Round 1 – Bouwmeester, Hans – 1-0 – Rellstab, Ludwig – G5 1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. c4 e6 5. O-O Be7 6. Nc3 c5 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 Qc8
1962 Copenhagen – Round 4 – Hamann, Svend – 1-0 – From, Sigfred – G36 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 c5 6. O-O Be7 7. Nc3 cxd4 8. Qxd4 Nc6 9. Qf4 Qb8 10. Rd1 Qxf4
1963 Alekhine Memorial – Round 7 – Smyslov, Vladimir – 1/2-1/2 – Tal, Mikhail – G50 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. O-O c5 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 Qb8 10. Qxb8+ Rxb8
1963 Asztalos Memorial – Round 9 – Lengyel, Laszlo – 1/2-1/2 – Forintos, Gyozo V – G22 1. c4 Nf6 2. Nf3 e6 3. g3 b6 4. Bg2 Bb7 5. O-O c5 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 Qb8 10. Rd1 Qxf4
1963 Sochi – Round 5 – Smyslov, Vladimir – 1/2-1/2 – Kholmov, Ratmir D – G37 1. Nf3 Nf6 2. c4 e6 3. Nc3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 Qb8
1964 IBM – Round 3 – Barcza, Gedeon – 1-0 – Van Scheltinga, Theo – G20 1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. O-O c5 5. c4 e6 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 Qb8 10. b3 Qxf4
1964 WchT U26 11. qual-B – Round 1.4 – Sloth, Jorn – 1-0 – Ketola, Klaus – G4 1. c4 Nf6 2. Nc3 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 c5 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 a6
1965 Budapest2 – Round 14 – Lengyel, Levente – 1/2-1/2 – Szabo, Laszlo – G50 1. c4 Nf6 2. Nf3 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 Qb8 10. Qxb8+ Rxb8
1965 Capablanca Memorial – Round 18 – Pachman, Ludek – 1/2-1/2 – Smyslov, Vladimir – G179 1. c4 Nf6 2. Nc3 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 c5 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 Qb8
1965 Hungary – Round 1 – Navarovszky, Laszlo – 1/2-1/2 – Lengyel, Agnes – G8 1. c4 Nf6 2. Nf3 e6 3. g3 b6 4. Bg2 Bb7 5. O-O c5 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 Qb8 10. Qxb8+ Rxb8
1965 Marianske Lazne – Round 12 – Pachman, Ludek – 1/2-1/2 – Shamkovich, Leonid – G54 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 Qc8
1966 Santa Monica – Round 18 – Portisch, Lajos – 1/2-1/2 – Larsen, Benjamin Holsko – G71 1. c4 Nf6 2. Nc3 c5 3. Nf3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 d6
1966 Tbilisi ch-URS – Round 14 – Taimanov, Mark E – 1-0 – Kholmov, Ratmir D – G128 1. Nf3 Nf6 2. c4 e6 3. Nc3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 d6
1967 October Revolution 50 – Round ? – Korchnoi, Viktor – 1/2-1/2 – Barcza, Gedeon – G79 1. c4 e6 2. Nc3 c5 3. Nf3 Nf6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 Qb8 10. Nb5 O-O
1967 Vrnjacka Banja zt – Round 1 – Lengyel, Levente – 1/2-1/2 – Barczay, Laszlo – G1 1. c4 Nf6 2. Nc3 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 c5 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 Qb8
1968 Alma Ata ch-URS – Round 1 – Nikitin, A. – 1/2-1/2 – Gurgenidze, Bukhuti – G1 1. c4 c5 2. Nc3 Nf6 3. Nf3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 Bb4
1968 Bamberg – Round 4 – Pfleger, Helmut, Dr. – 1/2-1/2 – Teschner, Rudolf – G40 1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. c4 c5 5. O-O e6 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 Qc8
1968 Buenos Aires – Round 7 – Ocampo, Raul – 0-1 – Rubinetti, Jorge – G52 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. O-O c5 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. e4 d6
1969 New York ch-USA – Round 1 – Benko, Pal – 1/2-1/2 – Saidy, Anthony – G2 1. c4 Nf6 2. Nc3 c5 3. g3 e6 4. Nf3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 Qb8 10. Rd1 O-O
1969 Vilnius – Round 10 – Kapengut, Albert – 0-1 – Butnorius, Algimantas – G50 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. O-O c5 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 a6
1969 Vrsac – Round 7 – Barcza, Gedeon – 1-0 – Rossolimo, Nicolas – G51 1. Nf3 Nf6 2. c4 c5 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 Qb8 10. Nb5 O-O
1969 WchT U26 fin-B 16th – Round 2.3 – Vadasz, Laszlo – 1-0 – Sande, Oystein – G11 1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. O-O e6 5. c4 c5 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 d5 10. Rd1 O-O
1969 Zagreb – Round 14 – Udovcic, Mijo – 1/2-1/2 – Siaperas, Triantafyllos – G99 1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. O-O e6 5. c4 c5 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qd2 Na5 10. b3 d5
1975 URS Team Ch – Round 5 – Krogius, Nikolai V – 1-0 – Shmit, Anatoly – G562 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. O-O c5 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 Qb8
FIDE World Cup 2025 – Round R2 Classical 1 – S.L. Narayanan – 1/2-1/2 – Nikita Vitiugov – G263 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. a3 dxc4 7. Bxc4 Bd6 8. Qc2 Nc6 9. f4 Nb8 10. e4 Be7
Manila Interzonal 1990 – Round 8 – Gulko, Boris – 1/2-1/2 – Tal, Mikhail – G132 1. c4 c5 2. Nf3 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 Qb8
RWE Gas Match 2001 – Round 5 – Kramnik, Vladimir – 0-1 – Leko, Peter – G5 1. Nf3 c5 2. c4 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 Qb8
World Rapid 2016 – Round 7.49 – Mareco, Sandro – 1-0 – Tissir, Mohamed – G282 1. Nf3 e6 2. c4 c5 3. g3 b6 4. Bg2 Bb7 5. O-O Nf6 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 Qb8 10. Rd1 O-O
XXII SuperGM 2005 – Round 12 – Anand, Viswanathan – 1/2-1/2 – Vallejo Pons, Francisco – G31 1. Nf3 c5 2. c4 Nf6 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 Qb8 10. Qxb8+ Rxb8

A30t — 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 Nc6

Eval: [+0.51]

Les coups candidats

9.Qf4 — 80.5% (664 parties)

Ambassadeurs : Gipslis, Aivars (11x), Konopka, Michal (9x), Kholmov, Ratmir D (8x), Yudasin, Leonid (8x), Lengyel, Levente (6x), Portisch, Lajos (6x), Korchnoi, Viktor (6x), Pachman, Ludek (5x)

9.Qd2 — 10.3% (85 parties)

Ambassadeurs : Geller, Efim P. (2x), Van Hoorn, Peter (1x), Colle, Edgar (1x), Keres, Paul Petrovich (1x), Vladimirov, Boris T (1x), Udovcic, Mijo (1x), Siaperas, Triantafyllos (1x), Needleman, Alejandro (1x)

9.Qd3 — 5.2% (43 parties)

Ambassadeurs : Marangunic, Srdjan (1x), Kovacevic, Veljko (1x), Campbell, Brett (1x), Pacey, Kevin (1x), Haro Garcia, Gilberto (1x), Velez Betancourt, Nestor Tomas (1x), Guenzel, Siegbert (1x), Crawford, Gary T (1x)

9.Qd1 — 3.8% (31 parties)

Ambassadeurs : Rudenko, Ludmila (1x), Lauberte, Milda (1x), Litmanowicz, Miroslawa (1x), Teodorescu, Margareta (1x), Stepak, Yedael (1x), Bernstein, Yaacov (1x), Sommerfeld, Gilbert (1x), Forbes, Garry (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	9.Qf4	9.Qd2	9.Qd3	9.Qd1
<1800	11	64%	—	18%	18%
1800-2200	218	71%	17%	8%	4%
2200-2600	421	84%	9%	5%	2%
2600+	16	94%	—	6%	—

Évolution par décennie (% des parties)

Décennie	N parties	9.Qf4	9.Qd2	9.Qd3	9.Qd1
1920s	1	—	100%	—	—
1950s	24	83%	8%	—	8%
1960s	38	92%	3%	3%	3%
1970s	49	98%	—	2%	—
1980s	52	83%	15%	2%	—
1990s	124	82%	9%	5%	4%
2000s	206	76%	13%	7%	4%
2010s	276	76%	12%	6%	5%
2020s	55	89%	5%	4%	2%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
9.Qf4	76%	89%	▲ +13.0%
9.Qd2	12%	5%	▼ -6.5%
9.Qd3	6%	4%	▼ -2.5%
9.Qd1	5%	2%	▼ -3.3%

Joueurs célèbres

Champions du monde dans cette position

Smyslov, Vladimir — 5 parties
Tal, Mikhail — 4 parties
Karpov, Anatoly — 1 partie
Kramnik, Vladimir — 1 partie
Anand, Viswanathan — 1 partie
Kasparov, Garry — 1 partie

Parties historiques

9.Qf4 — 80.5% (664 parties)

1953 — Janosevic, Dragoljub vs Nedeljkovic, Srecko M — 0-1 — Zagreb CRO
1956 — Simagin, Vladimir vs Antoshin, Vladimir S — 0-1 — Leningrad ch-URS
1956 — Najdorf, Miguel vs Unzicker, Wolfgang — 1-0 — Moscow RUS
1956 — Kholmov, Ratmir D vs Pachman, Ludek — 1/2-1/2 — Dresden GER
1956 — Szabo, Laszlo vs O'Kelly, Albéric de Galway — 1/2-1/2 — Hastings ENG

9.Qd2 — 10.3% (85 parties)

1928 — Van Hoorn, Peter vs Colle, Edgar — 1/2-1/2 — Amsterdam NED
1954 — Geller, Efim P. vs Vladimirov, Boris T — 1-0 — Gorki ch22-SU sf
1955 — Geller, Efim P. vs Keres, Paul Petrovich — 1/2-1/2 — Goteborg SWE
1969 — Udovcic, Mijo vs Siaperas, Triantafyllos — 1/2-1/2 — Zagreb CRO
1980 — Gallmeyer, Peter vs Knudsen, Ole — 1-0 — Odense DEN

9.Qd3 — 5.2% (43 parties)

1969 — Marangunic, Srdjan vs Kovacevic, Veljko — 1-0 — Zagreb CRO
1978 — Haro Garcia, Gilberto vs Velez Betancourt, Nestor Tomas — 1-0 — Havana CUB
1984 — Campbell, Brett vs Pacey, Kevin — 1/2-1/2 — Toronto CAN
1992 — Djukanovic, Marko vs Berlinsky, Vladimir — 0-1 — Can Picafort
1994 — Guenzel, Siegbert vs Crawford, Gary T — 1/2-1/2 — ?

9.Qd1 — 3.8% (31 parties)

1955 — Rudenko, Ludmila vs Lauberte, Milda — 1/2-1/2 — Voroshilovgrad
1957 — Litmanowicz, Miroslawa vs Teodorescu, Margareta — 1-0 — Krakow POL
1961 — Stepak, Yedael vs Bernstein, Yaacov — 1/2-1/2 — Tel Aviv ISR
1991 — Aburto Hernandez, Gevin Josue vs Abraira Rodriguez, Alicia — 1-0 — Maringa
1993 — Gurieli, Nino vs Lacruz Lucia, Maria — 1-0 — Jakarta iztw

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