Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→e3, e3→d4	● f7→e6
Passés	—	—
Majorité	—	● aile dame 3v2

Cases

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

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● c	● d

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 1)
Bc4	● Bc4 Actif (mob. 7)
Bb4		● Bb4 Ok (mob. 3)
Bc8		● Bc8 Non développé (mob. 1)
Paire de fous	● Oui	● Oui
Non développées	2 (● c1, ● a1)	3 (● b8, ● c8, ● a8)

Sécurité du roi

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

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	mobile
Ruptures	● d4-d5	● …e6-e5

E54c — Nimzo-Indian: Main Line, Smyslov Variation

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O dxc4 8.Bxc4 Qe7 * ○ Trait aux Blancs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plans. a3 (Préparer expansion aile dame — 66 % des parties) ; Qe2 (18 % des parties) ; Qc2 (Dame très active (15 cases) — 7 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plans. ...Ba5 (Fou actif (mobilité 5) — 64 % des parties) ; ...Nc6 (Développer b8 — 13 % des parties) ; ...Bd7 (Fou actif (mobilité 5), Développer c8 — 13 % des parties) ; ...Rd8 (Tour sur colonne semi-ouverte d — 6 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Partie
1959 Candidats Tournament – Round 19 – Gligoric, Sofija – 0-1 – Smyslov, Vladimir – G71 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qc2 Bd7
1959 HUN Ch Budapest HUN – Round 9 – Szily, Jozsef – 1-0 – Foldi, Jozsef – G38 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qe2 Nc6
1959 New York ch-USA – Round 6 – Byrne, Ray – 1/2-1/2 – Reshevsky, Samuel – G30 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. e3 O-O 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qc2 Bd7
1960 UKR Ch – Round 6 – Rotstein, Jefim – 0-1 – Novopashin, Arkady – G33 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qc2 Bd7
1960 URS Ch sf – Round 15 – Movshovich A – 1-0 – Uusi, Gunnar – G115 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qe2 Bd7
1960 URS Ch sf – Round 5 – Peterson, Andrejs – 1/2-1/2 – Novopashin, Arkady – G33 1. c4 e6 2. d4 Nf6 3. Nc3 Bb4 4. e3 d5 5. Nf3 O-O 6. Bd3 c5 7. O-O dxc4 8. Bxc4 Qe7 9. Qe2 Rd8 10. a3 Ba5
1961 Soviet-ch28 – Round 14 – Geller, Efim P – 1-0 – Smyslov, Vladimir – G22 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qc2 Bd7
1962 New York ch-USA – Round 1 – Steinmeyer, Robert – 1-0 – Evans Lianda – G2 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 c5 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Bxc3 10. bxc3 Nbd7
1963 Alekhine Memorial – Round 2 – Liberzon, Vladimir M – 0-1 – Smyslov, Vladimir – G11 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. Qe2 Nc6 10. Rd1 Rd8
1963 Leningrad ch-URS – Round 1 – Taimanov, Mark E – 0-1 – Kholmov, Ratmir D – G39 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 c5 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. Qe2 Nc6 10. Bd2 Rd8
1964 Amsterdam Interzonal – Round 16 – Portisch, Lajos – 1-0 – Porath, Yosef – G157 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 d5 6. Nf3 O-O 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qc2 Bd7
1964 Buenos Aires – Round 14 – Filip, Miroslav – 1/2-1/2 – Eliskases, Erich – G124 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 c5 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Bd2 Rd8
1964 Capablanca Memorial – Round 4 – Taimanov, Mark E – 1/2-1/2 – Smyslov, Vladimir – G43 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. Qc2 Bd7 10. a3 Ba5
1964 Capablanca Memorial – Round 9 – Portisch, Lajos – 1/2-1/2 – Smyslov, Vasily – G84 1. c4 Nf6 2. Nc3 e6 3. d4 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qc2 Bd7
1964 Capablanca Memorial – Round 9 – Portisch, Lajos – 1/2-1/2 – Smyslov, Vladimir – G85 1. c4 Nf6 2. Nc3 e6 3. d4 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qc2 Bd7
1964 Kiev ch-URS – Round 1 – Borisenko, Georgy K – 1/2-1/2 – Korchnoi, Viktor – G38 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nf3 O-O 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qe2 Bd7
1965 Aalborg – Round 1 – Holm, Sejer – 1-0 – Kolbak, Jens – G19 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. e3 O-O 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. Qc2 Nc6 10. a3 Ba5
1965 Capablanca Memorial – Round 20 – Geller, Efim P – 1/2-1/2 – Smyslov, Vladimir – G199 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nf3 O-O 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Bd2 Nc6
1965 Novi Sad – Round 11 – Gligorić, Svetozar – 1/2-1/2 – Puc, Stojan – G90 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Bd3 Nc6
1966 La Habana ol – Round ? – Kraidman, Yair – 1-0 – Bouteville, Guy – G5 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Qe7 9. Qe2 Nc6 10. Rd1 Rd8
1966 La Habana olm fin-B – Round 6 – Kraidman, Yair – 1-0 – Boutteville, Cesar – G85 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 c5 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. Qe2 Nc6 10. Rd1 Rd8
1966 Malaga Malaga ESP – Round 3 – Toran Albero, Roman – 1-0 – Medina-Garcia, Antonio – G2 1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 Bb4 5. e3 O-O 6. Bd3 c5 7. O-O dxc4 8. Bxc4 Qe7 9. Qe2 a6 10. a3 Ba5
1966 Panamerican – Round ? – Schweber, Samuel – 1/2-1/2 – Cobo Arteaga, Eldis – G56 1. c4 Nf6 2. Nc3 e6 3. d4 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. Qe2 Bd7 10. Rd1 Bc6
1966 Panamerican – Round ? – Yepez, Olavo – 1-0 – Cobo Arteaga, Eldis – G58 1. c4 Nf6 2. Nc3 e6 3. d4 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. Qe2 Nc6 10. Rd1 Rd8
1967 Asztalos Memorial 10th – Round 3 – Damjanovic, Mato – 1-0 – Cobo Arteaga, Eldis – G11 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nf3 O-O 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qe2 Nc6
1967 Capablanca Memorial – Round 14 – Taimanov, Mark E – 1/2-1/2 – Smyslov, Vladimir – G119 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qc2 Bd7
1967 Clare Benedict Cup 14th – Round 5.1 – Donner, Jan-Hein – 1/2-1/2 – Unzicker, Wolfgang – G25 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qe2 Nc6
1967 Copenhagen – Round 1 – Hamann, Svend – 0-1 – Unzicker, Wolfgang – G7 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qe2 Nc6
1967 DSV-Turnier – Round 5 – Kozma, Julius – 0-1 – Fuchs, Reinhart – G29 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qc2 Bd7
1967 Dundee – Round 3 – Olafsson, Fridrik – 1-0 – O'Kelly, Albéric de Galway – G6 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nf3 O-O 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. Bd3 Nc6 10. Ne4 cxd4
1967 Moscow – Round ? – Portisch, Lajos – 0-1 – Smyslov, Vasily – G154 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nf3 O-O 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qc2 Bd7
1967 Moscow – Round 1 – Gligoric, Sofija – 1/2-1/2 – Smyslov, Vladimir – G41 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Bd3 Nbd7
1967 Moscow RUS – Round 1 – Portisch, Lajos – 0-1 – Smyslov, Vladimir – G4 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nf3 O-O 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qc2 Bd7
1967 Moscow RUS – Round 15 – Gligorić, Svetozar – 1/2-1/2 – Gheorghiu, Florin – G28 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qc2 Bd7
1967 Palma de Mallorca – Round 15 – Jimenez Zerquera, Eleazar – 1/2-1/2 – Medina-Garcia, Antonio – G107 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. Bd2 Bd7 10. a3 Ba5
1967 Rubinstein Memorial – Round 11 – Furman, Slavomir – 1-0 – Schmidt, Waldemar – G41 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qc2 Bd7
1968 Bamberg – Round 4 – Toran Albero, Roman – 0-1 – Unzicker, Wolfgang – G36 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Qe7 9. Qe2 Nc6 10. Rd1 Rd8
1968 CSR Ch – Round 5 – Jansa, Vlastimil – 1-0 – Janata, Michael – G42 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. Qe2 Rd8 10. Bd2 cxd4
1968 IBM – Round 3 – Donner, Jan-Hein – 1-0 – Bouwmeester, Hans – G16 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Bd3 Bd7
1968 IBM I – Round 9 – Donner, Jan-Hein – 1/2-1/2 – Langeweg, Kick – G31 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Bd3 Nbd7
1968 Lugano olm - Round 1 - Najdorf, Miguel - 1/2-1/2 - Unzicker, Wolfgang - G98 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Bd2 Nc6
1968 Lugano SUI – Round 11 – Gligorić, Svetozar – 1/2-1/2 – Reshevsky, Samuel – G102 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qc2 Bd7
1968 Mar del Plata ch-ARG – Round 10 – Najdorf, Miguel – 1/2-1/2 – Sanguineti, Raúl Carlos – G64 1. d4 e6 2. c4 Nf6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qe2 Nc6
1968 Reykjavik – Round 1 – Addison, Wiliam G – 1-0 – Sigurjonsson, Gudmundur – G24 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Bd3 a6
1968 Skopje/Ohrid – Round 14 – Portisch, Lajos – 1-0 – Gheorghiu, Florin – G113 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qc2 Bd7
1968 Skopje/Ohrid – Round 15 – Savon, Vladimir – 1/2-1/2 – Polugaevsky, Lev – G125 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. Qe2 Bd7 10. Rd1 Bc6
1968 Sombor – Round 1 – Barczay, Laszlo – 0-1 – Ivkov, Borislav – G2 1. c4 Nf6 2. Nc3 e6 3. d4 Bb4 4. Nf3 c5 5. e3 O-O 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. Bd2 Rd8 10. Qe2 cxd4
1968 Yugoslavia – Round 1 – Gligorić, Svetozar – 1/2-1/2 – Ivkov, Borislav – G6 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qc2 Rd8
1969 Capablanca Memorial – Round 11 – Gligorić, Svetozar – 1-0 – O'Kelly, Albéric de Galway – G81 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qd3 Rd8
1969 Capablanca Memorial – Round 3 – Pomar Salamanca, Arturo – 1/2-1/2 – O'Kelly, Albéric de Galway – G22 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Bd3 Nbd7
1969 Hungary – Round 1 – Polugaevsky, Lev – 1-0 – Portisch, Lajos – G3 1. c4 Nf6 2. Nc3 e6 3. d4 Bb4 4. Nf3 c5 5. e3 O-O 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qe2 Rd8
1969 IBM – Round 2 – Darga, Klaus – 1/2-1/2 – Ivkov, Borislav – G8 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Qe7 9. Qe2 Nc6 10. Bd2 cxd4
1969 Olot – Round 4 – Pomar Salamanca, Arturo – 1/2-1/2 – Ivkov, Borislav – G19 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qe2 Nc6
1969 YUG Ch 24th – Round 6 – Cvetkovic, Srdjan – 1/2-1/2 – Bukic, Enver – G18 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Qe7 9. Qc2 Bd7 10. Ne4 Nxe4
1970 Palma de Mallorca Interzonal – Round 12 – Mecking, Henrique – 1/2-1/2 – Panno, Oscar – G88 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 d5 6. Nf3 O-O 7. O-O dxc4 8. Bxc4 Qe7 9. a3 Ba5 10. Qd3 Nbd7

E54c — Main Line, Smyslov Variation (1959)

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O dxc4 8.Bxc4 Qe7

Les coups candidats

9.a3 — 70.9% (168 parties)

Ambassadeurs : Smyslov, Vasily (5x), Portisch, Lajos (5x), Gligoric, Sofija (5x), Donner, Jan-Hein (4x), Unzicker, Ferdinand, Dr. (4x), Taimanov, Mark (4x), Borisenko, Georgy K (3x), Novopashin, Arkady (3x)

9.Qe2 — 19.0% (45 parties)

Ambassadeurs : Toran Albero, Roman (2x), Cobo Arteaga, Eldis (2x), Kraidman, Yair (2x), Ruderfer, Mark B (1x), Govashelishvili, Genadij (1x), Savon, Vladimir (1x), Polugaevsky, Lev (1x), Jansa, Vlastimil (1x)

9.Qc2 — 3.8% (9 parties)

Ambassadeurs : Bukic, Enver (2x), Smyslov, Vasily (2x), Djordjevic, Velimir (1x), Marek, Ivan (1x), Kausek (1x), Weiner, Alex (1x), Cvetkovic, Srdjan (1x), Holm, Sejer (1x)

9.Bd3 — 2.1% (5 parties)

Ambassadeurs : Olafsson, Fridrik (1x), O'Kelly, Albéric de Galway (1x), Grigorian, Aik (1x), Kuzmin, Gennadiy (1x), Grigorian, Karen (1x), Kuzmin, Gennadi (1x), Rubinetti, Jorge (1x), Acosta, Tomas (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	9.a3	9.Qe2	9.Qc2	9.Bd3
<1800	4	75%	25%	—	—
1800-2200	38	84%	11%	—	3%
2200-2600	89	67%	21%	4%	1%
2600+	3	33%	67%	—	—

Évolution par décennie (% des parties)

Décennie	N parties	9.a3	9.Qe2	9.Qc2	9.Bd3
1950s	3	100%	—	—	—
1960s	72	58%	24%	8%	4%
1970s	45	82%	7%	4%	2%
1980s	27	81%	15%	4%	—
1990s	24	75%	17%	—	4%
2000s	37	73%	22%	—	—
2010s	28	64%	32%	—	—
2020s	1	100%	—	—	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
9.a3	64%	100%	▲ +35.7%
9.Qe2	32%	0%	▼ -32.1%
9.Qc2	0%	0%	+0.0%
9.Bd3	0%	0%	+0.0%

Joueurs célèbres

Champions du monde dans cette position

Smyslov, Vladimir — 2 parties

Parties historiques

9.a3 — 70.9% (168 parties)

1959 — Szily, Jozsef vs Foldi, Jozsef — 1-0 — HUN-ch Budapest HUN
1959 — Byrne, Robert E vs Rapaka Samuel Paul — 1/2-1/2 — New York ch-USA
1959 — Gligorić, Svetozar vs Smyslov, Vasily — 0-1 — Bled/Zagreb/Belgrade
1960 — Borisenko, Georgy K vs Novopashin, Arkady — 1/2-1/2 — Kiev UKR
1960 — Rotstein, Jefim vs Novopashin, Arkady — 0-1 — ?

9.Qe2 — 19.0% (45 parties)

1960 — Peterson, Andrejs vs Novopashin, Arkady — 1/2-1/2 — Vilnius LTU
1961 — Thomson, Derec vs Larusson, Gudmundur — 0-1 — The Hague NED
1963 — Liberzon, Vladimir M vs Smyslov, Vasily — 0-1 — Moscow RUS
1963 — Taimanov, Mark vs Kholmov, Ratmir D — 0-1 — Leningrad ch-URS
1966 — Toran Albero, Roman vs Medina-Garcia, Antonio — 1-0 — Malaga Malaga ESP

9.Qc2 — 3.8% (9 parties)

1964 — Taimanov, Mark vs Smyslov, Vasily — 1/2-1/2 — Havana CUB
1965 — Holm, Sejer vs Kolbak, Jens — 1-0 — Aalborg DEN
1965 — Letelier, Sergio vs Smyslov, Vasily — 1/2-1/2 — Santiago de Chile
1968 — Kausek vs Weiner, Alex — 1/2-1/2 — corr ch CZE
1969 — Djordjevic, Velimir vs Marek, Ivan — 0-1 — ?

9.Bd3 — 2.1% (5 parties)

1967 — Olafsson, Fridrik vs O'Kelly, Albéric de Galway — 1-0 — Dundee SCO
1969 — Grigorian, Aik vs Kuzmin, Gennadiy — 0-1 — USSR
1969 — Grigorian, Karen vs Kuzmin, Gennadi — 0-1 — ?
1971 — Rubinetti, Jorge vs Acosta, Tomas — 1/2-1/2 — Villa Gesell ARG
1991 — Whitehead, Chris vs Kelly, Laszlo — 1-0 — ?

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