D34b — QGD Tarrasch: 7.Bg2 Be7 8.O-O Be6

1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O Be6 * ○ Trait aux Blancs

Ouverture — Centre fermé

♔ 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'centre (2 contre 1), les cases fortes f4, e5 et g5, un avant-poste en f4, la paire de fous et la colonne semi-ouverte c.

Côté adverse. Le fou enfermé en e7 et le roi resté au centre.

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

Plans. Bg5 (Clouer Nf6) ; h3 (Empêcher ...Bg4) ; Tour sur colonne c.

♚ 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'aile_dame (3 contre 2), les cases fortes b4, e4 et g4, un fou actif en e6, la paire de fous et la colonne semi-ouverte e.

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) ; ...c4 (Rupture) ; Tour sur colonne e.

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

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

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● f4 (2v0), ● e5 (2v1), ● g5 (2v0)	● b4 (2v0), ● e4 (2v1), ● g4 (2v0)
Cases faibles	● d4	—
Centre	● e5 (2v1)	● d5 (3v1), ● e4 (2v1)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● c	● e

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bg2	● Bg2 Enfermé (mob. 2)
Be6		● Be6 Actif (mob. 5)
Be7		● Be7 Enfermé (mob. 2)
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	fermé
Ruptures	—	● …c5-c4

Partie
1908 It (Men) Duesseldorf GER – Round 14 – Marshall Viele, Fabrizio Aaron – 1/2-1/2 – John, Walter – G15 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Be6 7. Bg2 Nf6 8. O-O Be7 9. Bg5 h6 10. Bxf6 gxf6
1908 Prague – Round 1 – Vidmar, Milan Sr – 1-0 – Spielmann, Rudolf – G10 1. d4 e6 2. c4 d5 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be6 8. O-O Be7 9. e3 O-O 10. b3 Qa5
1908 Prague – Round 10 – Marshall, Frank – 1/2-1/2 – Salwe, Georg – G84 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Be6 7. Bg2 Nf6 8. O-O Be7 9. Bg5 cxd4 10. Nxd4 Nxd4
1908 Prague – Round 10 – Vidmar, Milan Sr – 1-0 – Spielmann, Rudolf – G86 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be6 8. O-O Be7 9. e3 O-O 10. b3 Qa5
1908 Prague – Round 2 – Schlechter, Carl – 1-0 – Duz-Khotimirsky, Fedor Ivanovich – G24 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Be6 7. Bg2 Nf6 8. O-O Be7 9. a3 O-O 10. dxc5 d4
1909 New York – Round 23 – Marshall Viele, Fabrizio Aaron – 0-1 – Capablanca, Jose – G9 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Be6 7. Bg2 Be7 8. O-O Nf6 9. Bg5 Ne4 10. Bxe7 Qxe7
1911 Karlsbad – Round 1 – Rotlewi, Georg – 1/2-1/2 – Rubinstein, Akiba – G66 1. d4 d5 2. Nf3 c5 3. c4 e6 4. cxd5 exd5 5. Nc3 Nc6 6. g3 Nf6 7. Bg2 Be6 8. O-O Be7 9. dxc5 Bxc5 10. a3 O-O
1911 Karlsbad – Round 1 – Rubinstein, Akiba – 1/2-1/2 – Vidmar, Milan Sr – G73 1. d4 d5 2. Nf3 c5 3. c4 e6 4. cxd5 exd5 5. Nc3 Nc6 6. g3 Nf6 7. Bg2 Be6 8. O-O Be7 9. dxc5 Bxc5 10. a3 O-O
1911 New York USA – Round 5 – Hodges, Albert – 1-0 – Johner, Paul – G11 1. d4 d5 2. Nf3 e6 3. c4 c5 4. cxd5 exd5 5. Nc3 Nc6 6. g3 Nf6 7. Bg2 Be6 8. O-O Be7 9. Bg5 Ne4 10. Bxe7 Qxe7
1911 San Sebastian – Round 1 – Rubinstein, Akiba – 1/2-1/2 – Teichmann, Richard – G1 1. d4 d5 2. Nf3 c5 3. c4 e6 4. Nc3 Nc6 5. cxd5 exd5 6. g3 Be6 7. Bg2 Nf6 8. O-O Be7 9. dxc5 Bxc5 10. a3 O-O
1912 Biarritz m – Round ? – Marshall, Frank – 1/2-1/2 – Janowski, Dawid – G8 1. d4 d5 2. Nf3 c5 3. c4 e6 4. cxd5 exd5 5. Nc3 Be6 6. g3 Nc6 7. Bg2 Nf6 8. O-O Be7 9. dxc5 O-O 10. Bg5 h6
1912 DSB-18.Kongress – Round 4 – Burn, Amos – 0-1 – Tarrasch, Siegbert – G24 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Be6 7. Bg2 Nf6 8. O-O Be7 9. dxc5 Bxc5 10. Bg5 d4
1912 It (Men) San Sebastian ESP – Round 11 – Forgacs, Gyula – 0-1 – Spielmann, Rudolf – G24 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O Be6 9. Bg5 Ne4 10. Bxe7 Qxe7
1913 It (Men) Scheveningen NED – Round 1 – Loman, Rudolf – 0-1 – Olland, Adolf George – G2 1. d4 d5 2. Nf3 c5 3. c4 e6 4. cxd5 exd5 5. Nc3 Nc6 6. g3 Nf6 7. Bg2 Be6 8. O-O Be7 9. a3 O-O 10. dxc5 Bxc5
1913 New York National – Round 1 – Kupchik, Abraham – 1-0 – Zapoleon, LB. – G1 1. d4 d5 2. Nf3 c5 3. c4 e6 4. Nc3 Nc6 5. cxd5 exd5 6. g3 Nf6 7. Bg2 Be6 8. O-O Be7 9. dxc5 Bxc5 10. Bg5 Be7
1914 Baden-Baden GER – Round 9 – Rabinovich, Ilya Mar – 0-1 – Flamberg, Alexander – G9 1. d4 d5 2. c4 e6 3. Nc3 c5 4. Nf3 Nc6 5. cxd5 exd5 6. g3 Nf6 7. Bg2 Be7 8. O-O Be6 9. Bg5 Ne4 10. Bxe7 Qxe7
1915 Triberg – Round 10 – Bogoljubow, Efim – 1-0 – Rabinovich, Ilya Mar – G27 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 exd5 6. g3 Be6 7. Bg2 Be7 8. O-O Nc6 9. dxc5 Bxc5 10. b3 O-O
1915 Triberg – Round 7 – Rabinovich, Ilya Mar – 1-0 – Weinstein, Shaul – G19 1. d4 d5 2. Nf3 c5 3. c4 e6 4. cxd5 exd5 5. Nc3 Nc6 6. g3 Be6 7. Bg2 Nf6 8. O-O Be7 9. Bg5 Ne4 10. Bxe7 Qxe7
1916 Triberg – Round ? – Rabinovich, Ilya Mar – 1-0 – Maliutin, Boris – G2 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be6 8. O-O Be7 9. dxc5 Bxc5 10. Bg5 d4
1919 Amsterdam m1 – Round 7 – Euwe, Max – 1-0 – Kroone, Gerard – G7 1. Nf3 d5 2. d4 c5 3. c4 e6 4. cxd5 exd5 5. Nc3 Nc6 6. g3 Nf6 7. Bg2 Be6 8. O-O Be7 9. dxc5 d4 10. Na4 O-O
1919 Hastings – Round 1 – Capablanca, Jose – 1-0 – Olland, Adolf George – G1 1. d4 d5 2. c4 e6 3. Nf3 c5 4. cxd5 exd5 5. Nc3 Nf6 6. g3 Be6 7. Bg2 Nc6 8. O-O Be7 9. dxc5 Bxc5 10. Bg5 Be7
1919 Hastings – Round 1 – Winter, William – 0-1 – Olland, Adolf – G2 1. d4 d5 2. Nf3 c5 3. c4 e6 4. cxd5 exd5 5. Nc3 Nf6 6. g3 Nc6 7. Bg2 Be6 8. O-O Be7 9. dxc5 Bxc5 10. Bg5 Be7
1919 Hastings – Round 3 – Winter, William – 1-0 – Yates, Frederic D – G10 1. d4 d5 2. Nf3 c5 3. c4 e6 4. cxd5 exd5 5. Nc3 Be6 6. g3 Nc6 7. Bg2 Nf6 8. O-O Be7 9. dxc5 Bxc5 10. Bg5 Be7
1919 Hastings – Round 5 – Kostic, Boris – 1-0 – Olland, Adolf – G16 1. d4 d5 2. Nf3 c5 3. c4 e6 4. cxd5 exd5 5. Nc3 Nf6 6. g3 Be6 7. Bg2 Nc6 8. O-O Be7 9. dxc5 Bxc5 10. Bg5 Be7
1920 It (Men) Berlin GER – Round 2 – Bogoljubow, Efim – 1-0 – Tarrasch, Siegbert – G4 1. d4 d5 2. c4 e6 3. Nf3 c5 4. cxd5 exd5 5. Nc3 Nc6 6. g3 Nf6 7. Bg2 Be6 8. O-O Be7 9. dxc5 Bxc5 10. b3 O-O
1921 Budapest – Round 1 – Saemisch, Friedrich – 1/2-1/2 – Vajda, Arpad – G10 1. d4 d5 2. Nf3 e6 3. c4 Nf6 4. Nc3 c5 5. cxd5 exd5 6. g3 Nc6 7. Bg2 Be7 8. O-O Be6 9. dxc5 Bxc5 10. b3 a6
1922 Bad Pistyan – Round 14 – Reti, Richard – 1-0 – Tarrasch, Siegbert – G78 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be6 8. O-O Be7 9. dxc5 Bxc5 10. Na4 Be7
1923 Trieste – Round 1 – Asztalos, Lajos – 1-0 – Gonzalez Singer, Diego Alejandro – G4 1. d4 d5 2. Nf3 c5 3. c4 e6 4. cxd5 exd5 5. Nc3 Nc6 6. g3 Be7 7. Bg2 Be6 8. O-O Nf6 9. dxc5 Bxc5 10. Na4 Be7
1923 Trieste – Round 4 – Asztalos, Lajos – 1-0 – Singer, Leone – G23 1. d4 d5 2. Nf3 c5 3. c4 e6 4. cxd5 exd5 5. Nc3 Nc6 6. g3 Be7 7. Bg2 Be6 8. O-O Nf6 9. dxc5 Bxc5 10. Na4 Be7
1923 Verenigde Staten m ch-USA – Round 4 – Marshall Viele, Fabrizio Aaron – 1-0 – Lasker, E. – G4 1. d4 d5 2. Nf3 e6 3. c4 c5 4. cxd5 exd5 5. Nc3 Nc6 6. g3 Nf6 7. Bg2 Be6 8. O-O Be7 9. dxc5 Bxc5 10. Bg5 d4
1924 Weston – Round 9 – Mackenzie, Arthur J – 1/2-1/2 – Drewitt, John Arthur – G23 1. d4 d5 2. c4 e6 3. Nf3 c5 4. cxd5 exd5 5. Nc3 Nf6 6. g3 Nc6 7. Bg2 Be7 8. O-O Be6 9. dxc5 Bxc5 10. Qa4 O-O
1928 Brno – Round 3 – Kmoch, Hans – 1/2-1/2 – Marshall, Frank – G8 1. Nf3 Nf6 2. c4 e6 3. g3 d5 4. Bg2 c5 5. O-O Nc6 6. cxd5 exd5 7. d4 Be6 8. Nc3 Be7 9. dxc5 Bxc5 10. Na4 Be7
1931 Argentina – Round 7 – Castillo Lynch, Jacob Tyler – 1-0 – Maderna, Carlos – G23 1. c4 Nf6 2. Nc3 e6 3. g3 d5 4. Bg2 c5 5. cxd5 exd5 6. Nf3 Nc6 7. d4 Be6 8. O-O Be7 9. dxc5 d4 10. Nb5 Bxc5
1932 Pasadena – Round 1 – Dake, Arthur William – 1-0 – Factor, Samuel D – G24 1. Nf3 Nf6 2. c4 e6 3. g3 d5 4. Bg2 c5 5. cxd5 exd5 6. d4 Nc6 7. Nc3 Be6 8. O-O Be7 9. dxc5 Bxc5 10. Na4 Be7
1938 Bad Oeynhausen – Round 5 – Reinhardt, Heinrich – 0-1 – Acebey Michel, Veroska – G39 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O Be6 9. Bg5 Ne4 10. Bxe7 Qxe7
1939 Bad Elster – Round 2 – Heinicke, Herbert – 1/2-1/2 – Michel, Paul – G6 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O Be6 9. Bg5 Ne4 10. Bxe7 Qxe7
1939 Bad Oeynhausen ch-GER – Round 6 – Ernst, Wilhelm – 1/2-1/2 – Michel, Paul – G42 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O Be6 9. h3 O-O 10. dxc5 d4
1939 Buenos Aires ol f-A – Round 9 – Enevoldsen, Jens – 1/2-1/2 – Acebey Michel, Veroska – G170 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O Be6 9. Be3 c4 10. Ne5 O-O
1941 Buenos Aires Circulo – Round 5 – Frydman, Paulino – 1/2-1/2 – Acebey Michel, Veroska – G15 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O Be6 9. dxc5 Bxc5 10. Na4 Be7
1941 Mar del Plata – Round 7 – Bolbochan, J. – 1/2-1/2 – Michel, Pascal – G60 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O Be6 9. dxc5 Bxc5 10. Na4 Be7
1946 Mar del Plata – Round 3 – Iliesco, Juan – 1-0 – Letelier Martner, Rene – G39 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 c5 5. cxd5 exd5 6. d4 Nc6 7. O-O Be6 8. Nc3 Be7 9. dxc5 Bxc5 10. Na4 Be7
1946 Mar del Plata – Round 5 – Sanguinetti, Ricardo – 0-1 – Michel, Pascal – G58 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O Be6 9. Bg5 Ne4 10. Bxe7 Qxe7
1946 Moscow-Prague – Round 8 – Kotov, Alexander. – 1-0 – Opocensky, Karel – G33 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be6 8. O-O Be7 9. dxc5 Bxc5 10. Na4 Be7
1950 Mar del Plata – Round 14 – Gligorić, Svetozar – 1/2-1/2 – Michel, Paul – G122 1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d4 Nf6 5. O-O e6 6. c4 Be7 7. cxd5 exd5 8. Nc3 Be6 9. dxc5 Bxc5 10. Na4 Be7
1951 Moskou ch-URS – Round 1 – Simagin, Vladimir – 1/2-1/2 – Bondarevsky, Igor – G3 1. c4 e6 2. Nc3 d5 3. d4 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O Be6 9. b3 O-O 10. Bb2 b6
1951 Reggio Emilia – Round 1 – Millin, P – 1/2-1/2 – Rellstab, Ludwig – G8 1. d4 Nf6 2. Nf3 e6 3. c4 c5 4. g3 d5 5. cxd5 exd5 6. Bg2 Nc6 7. O-O Be6 8. Nc3 Be7 9. dxc5 Bxc5 10. Ng5 O-O
1951 Schlechter Memorial – Round ? – Lasker, Edward – 0-1 – Michel, Paul – G5 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O Be6 9. dxc5 Bxc5 10. Bg5 d4
1953 URS chT sf – Round ? – Kholmov, Ratmir D – 1/2-1/2 – Batigin – G2 1. d4 e6 2. c4 d5 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O Be6 9. Be3 O-O 10. h3 c4
1955 Hamburg – Round 2 – Stahlberg, Gideon – 1-0 – Rellstab, Ludwig – G32 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 d5 5. cxd5 exd5 6. d4 Nc6 7. Bg2 Be6 8. O-O Be7 9. dxc5 Bxc5 10. Na4 Be7
1956 Moscow olm fin-A – Round 11 – Filip, Marius Liviu – 1/2-1/2 – Unzicker, Wolfgang – G178 1. c4 Nf6 2. g3 e6 3. Bg2 d5 4. Nf3 c5 5. O-O Nc6 6. cxd5 exd5 7. d4 Be6 8. Nc3 Be7 9. dxc5 Bxc5 10. Na4 Be7
1959 Argentina – Round 10 – Foguelman, Alberto – 1-0 – Incutto, Carlos – G49 1. d4 Nf6 2. c4 e6 3. g3 c5 4. Nf3 d5 5. cxd5 exd5 6. Bg2 Nc6 7. O-O Be6 8. Nc3 Be7 9. dxc5 Bxc5 10. Bg5 d4
1959 UKR Ch – Round 19 – Rotstein, Jefim – 1/2-1/2 – Kostiuchenko, Alexander – G140 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. g3 c5 5. cxd5 exd5 6. Bg2 Nc6 7. O-O Be6 8. Nc3 Be7 9. h3 O-O 10. Be3 Qc8
1961 Oberhausen etc – Round 1 – Botvinnik, Mikhail – 1-0 – Unzicker, Wolfgang – G4 1. c4 Nf6 2. Nf3 e6 3. g3 d5 4. Bg2 c5 5. O-O Nc6 6. cxd5 exd5 7. d4 Be6 8. Nc3 Be7 9. Be3 c4 10. Ne5 O-O
1969 Buesum – Round 7 – Szabo, Laszlo – 1/2-1/2 – Zaitsev, Alexander – G21 1. Nf3 c5 2. c4 e6 3. g3 Nc6 4. Bg2 Nf6 5. O-O d5 6. cxd5 exd5 7. d4 Be6 8. Nc3 Be7 9. dxc5 Bxc5 10. Na4 Be7
1969 OWL Ch – Round 9 – Speer, Albrecht – 1-0 – Budt, Karl-Heinz – G20 1. Nf3 d5 2. d4 c5 3. c4 e6 4. cxd5 exd5 5. g3 Nc6 6. Bg2 Nf6 7. O-O Be6 8. Nc3 Be7 9. dxc5 d4 10. Na4 O-O
1969 URS Ch sf – Round ? – Zhukhovitsky, Samuel – 1-0 – Pavlenko, Oleg – G4 1. c4 Nf6 2. Nc3 c5 3. Nf3 Nc6 4. g3 e6 5. Bg2 d5 6. cxd5 exd5 7. d4 Be7 8. O-O Be6 9. dxc5 d4 10. Nb5 Bxc5

D34b —

1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O Be6

Eval: [+0.55]

Les coups candidats

9.dxc5 — 40.7% (310 parties)

Ambassadeurs : Rubinstein, Akiba (6x), Olland, Adolf George (3x), Rabinovich, Ilya Mar (3x), Tarrasch, Siegbert (3x), Bogoljubow, Efim (3x), Capablanca, Jose (3x), Kostic, Boris (3x), Lasker, Emanuel (3x)

9.Bg5 — 27.6% (210 parties)

Ambassadeurs : Marshall, Frank (3x), Rubinstein, Akiba (3x), Marshall Viele, Fabrizio Aaron (3x), Mieses, Jacques (2x), Rabinovich, Ilya Mar (2x), Capablanca, Jose (2x), Johner, Paul (2x), Lopez Munoz, Johan Schneider (2x)

9.b3 — 13.1% (100 parties)

Ambassadeurs : Gargulak Metodej (1x), Schubert, Frantisek (1x), Henshaw James Bassey (1x), Jourdain Caprasio, Lana (1x), Simagin, Vladimir (1x), Bondarevsky, Igor (1x), Manouck, Thierry (1x), Herb, Pascal (1x)

9.Bf4 — 5.5% (42 parties)

Ambassadeurs : Kupchik, Abraham (1x), Marder Albert (1x), Roth, Rolf (1x), Isaacson, David (1x), Schweber (1x), Aguilar Luna, Santiago (1x), Rehorek, Radomir (1x), Nemes, Gyorgy (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	9.dxc5	9.Bg5	9.b3	9.Bf4
<1800	40	35%	40%	2%	8%
1800-2200	310	40%	25%	14%	6%
2200-2600	173	37%	32%	21%	2%
2600+	3	67%	—	33%	—

Évolution par décennie (% des parties)

Décennie	N parties	9.dxc5	9.Bg5	9.b3	9.Bf4
1900s	13	8%	69%	—	—
1910s	52	63%	19%	4%	2%
1920s	22	86%	9%	—	—
1930s	7	43%	29%	—	—
1940s	8	75%	25%	—	—
1950s	15	60%	20%	7%	—
1960s	13	69%	8%	—	15%
1970s	16	31%	31%	19%	—
1980s	22	36%	18%	27%	14%
1990s	105	30%	34%	15%	7%
2000s	182	31%	32%	18%	7%
2010s	252	40%	29%	13%	4%
2020s	54	52%	9%	11%	15%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
9.dxc5	40%	52%	▲ +11.4%
9.Bg5	29%	9%	▼ -19.3%
9.b3	13%	11%	▼ -2.0%
9.Bf4	4%	15%	▲ +11.2%

Joueurs célèbres

Champions du monde dans cette position

Alekhine, Alexander — 3 parties
Lasker, Emanuel — 3 parties
Euwe, Max — 2 parties
Botvinnik, Mikhail — 1 partie

Parties historiques

9.dxc5 — 40.7% (310 parties)

1909 — Cohn, Erich vs Lasker, Edward — 1/2-1/2 — Berlin GER
1911 — Marshall Viele, Fabrizio Aaron vs Rubinstein, Akiba — 1-0 — Carlsbad CZE
1911 — Lowtzki, M vs Rotlewi, Georg — 1-0 — Leipzig GER
1911 — List, Paul vs Kubbel, Arvid — 0-1 — St Petersburg RUS
1911 — Rubinstein, Akiba vs Teichmann, Richard — 1/2-1/2 — San Sebastian ESP

9.Bg5 — 27.6% (210 parties)

1908 — Marshall, Frank vs Rubinstein, Akiba — 1/2-1/2 — Lodz POL
1908 — Marshall Viele, Fabrizio Aaron vs Mieses, Jacques — 1-0 — Berlin GER
1908 — Marshall Viele, Fabrizio Aaron vs John, Walter — 1/2-1/2 — Duesseldorf GER
1908 — Marshall, Frank vs Salwe, Georg — 1/2-1/2 — Prague CZE
1908 — Rubinstein, Akiba vs Salwe, Georg H S — 1-0 — Lodz mt Lodz POL

9.b3 — 13.1% (100 parties)

1912 — Henshaw James Bassey vs Jourdain Caprasio, Lana — 0-1 — Napier
1913 — Gargulak Metodej vs Schubert, Frantisek — 0-1 — Ceska Trebova
1951 — Simagin, Vladimir vs Bondarevsky, Igor — 1/2-1/2 — Moskou ch-URS
1972 — Jansa, Vlastimil vs Beliavsky, Alexander G — 1/2-1/2 — Sombor
1973 — Bilo, Heinz vs Soelter, Reinhold — 1/2-1/2 — Oelde

9.Bf4 — 5.5% (42 parties)

1913 — Kupchik, Abraham vs Marder Albert — 1-0 — New York, NY USA
1964 — Roth, Rolf vs Isaacson, David — 1/2-1/2 — Tel Aviv olm prel
1965 — Schweber vs Aguilar Luna, Santiago — 1-0 — Buenos Aires ch-ARG
1986 — Flear, Christine vs Geneciran, Glenda — 1-0 — Dubai UAE
1988 — Rehorek, Radomir vs Nemes, Gyorgy — 1-0 — Zalaegerszeg

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