E55b — Nimzo-Indian: Main Line, Bronstein, 9.a3

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 Nbd7 9.a3 * ● Trait aux Noirs

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'centre (2 contre 1), les cases fortes b5 et e5, un fou actif en c4, la paire de fous et la colonne semi-ouverte c.

Côté adverse. Le fou enfermé en c8.

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

Plans. Bd2 (Développer Bc1) ; 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), un avant-poste en d5, la paire de fous et la colonne semi-ouverte d.

Côté adverse. Le fou enfermé en c1.

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

Plans. b6+Bb7 (PRIORITÉ: libérer le Bc8 (b6+Bb7, ...Bg4, ...Bf5)) ; ...Bg4 (Clouer Nf3) ; ...e5 (Rupture) ; Tour sur colonne d.

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● b2→a3, f2→e3, e3→d4	● f7→e6
Passés	—	—
Majorité	● centre 2v1	● aile_dame 3v2

Cases

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

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● c	● d

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 1)
Bc4	● Bc4 Actif (mob. 8)
Bb4		● Bb4 Ok (mob. 3)
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	● d4-d5, ● e3-e4	● …e6-e5

Partie
19. Amber Rapid 2010 – Round 1 – Aronian, Levon – 1-0 – Karjakin, Sergey – G1 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 Nbd7 9. a3 cxd4 10. axb4 dxc3
1953 Candidats Tournament – Round 4 – Keres, Paul Petrovich – 1/2-1/2 – Euwe, Max – G20 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O Nbd7 8. a3 dxc4 9. Bxc4 cxd4 10. exd4 Be7
1953 Wch U20 qual – Round 7 – Sherwin, James T – 1-0 – Ivkov, Borislav – G23 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nbd7 8. a3 dxc4 9. Bxc4 cxd4 10. exd4 Be7
1956 Belgrade – Round 1 – Petrosian, Tigran A. – 1/2-1/2 – Djurasevic, Bozidar – G4 1. c4 Nf6 2. Nc3 e6 3. d4 Bb4 4. Nf3 c5 5. e3 O-O 6. Be2 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. a3 cxd4 10. Nb5 Be7
1956 Dresden – Round 5 – Kholmov, Ratmir D – 1/2-1/2 – Averbakh, Yuri L – G31 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 c5 7. O-O Nbd7 8. a3 dxc4 9. Bxc4 cxd4 10. exd4 Bxc3
1956 Leningrad ch-URS – Round 1 – Borisenko, Georgy K – 1/2-1/2 – Tal, Mikhail – G49 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. e3 O-O 6. Bd3 d5 7. O-O Nbd7 8. a3 dxc4 9. Bxc4 cxd4 10. Nb5 Be7
1956 Moscow olm fin-A – Round 7 – Najdorf, Miguel – 1/2-1/2 – Unzicker, Wolfgang – G111 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 Nbd7 9. a3 cxd4 10. Nb5 Be7
1956 Moscow olm fin-A – Round 8 – Wade, Robert G – 1/2-1/2 – Ivkov, Borislav – G128 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 Nbd7 9. a3 cxd4 10. Qxd4 Bxc3
1956 Moscow olm prel – Round 1 – Stenberg, O. – 1/2-1/2 – Smyslov, Vladimir – G9 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 Nbd7 9. a3 cxd4 10. exd4 Bxc3
1956 URS Ch sf – Round ? – Zamikhovsky, Abram – 1/2-1/2 – Klavins, Janis – G41 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. e3 O-O 6. Bd3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. a3 cxd4 10. Nb5 Be7
1957 Leningrad Ch – Round 17 – Cherepkov, Alexander V – 1-0 – Zilber, Israel – G127 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 Nbd7 9. a3 Bxc3 10. bxc3 Qc7
1957 Mar del Plata – Round 10 – Alonso-Lej De Las Casas, Fernando – 0-1 – Eliskases, Erich – G91 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 Nbd7 9. a3 cxd4 10. Nb5 Be7
1957 Minsk zt – Round 13 – Luik, Helmuth – 0-1 – Boleslavsky, Isaac – G90 1. c4 Nf6 2. Nc3 e6 3. d4 Bb4 4. e3 c5 5. Nf3 O-O 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. a3 cxd4 10. Qxd4 Bc5
1957 Minsk zt – Round 16 – Zelinsky, Yuri – 0-1 – Vistaneckis, Isakas – G111 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nf3 d5 6. Bd3 O-O 7. O-O dxc4 8. Bxc4 Nbd7 9. a3 cxd4 10. exd4 Bxc3
1957 Minsk zt – Round 3 – Roizman, Abram Y – 0-1 – Gipslis, Aivars – G18 1. c4 Nf6 2. Nc3 e6 3. d4 Bb4 4. e3 c5 5. Nf3 O-O 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. a3 cxd4 10. axb4 dxc3
1957 Sofia zt – Round 1 – Niemela, Ilmari Aarne – 1/2-1/2 – Sliwa, Bogdan – 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 Nbd7 9. a3 cxd4 10. exd4 Bxc3
1957 URS Ch, semi final – Round 14 – Lutikov, Anatoly S – 1/2-1/2 – Kholmov, Ratmir D – G138 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 Nbd7 9. a3 cxd4 10. Nb5 Be7
1958 Munich olm fin-B – Round 6 – Thorbergsson, Freysteinn – 1/2-1/2 – Szukszta, Janus – G55 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 Nbd7 9. a3 cxd4 10. Qxd4 Bc5
1958 Tashkent ch URS sf – Round ? – Osnos, Viatcheslav – 1-0 – Grushevsky, Alexander – G6 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. e3 Nbd7 5. Bd3 Bb4+ 6. Nc3 O-O 7. O-O dxc4 8. Bxc4 c5 9. a3 Ba5 10. Qc2 a6
1958 WchT U26 fin-A 05th – Round 5 – Gurgenidze, Bukhuti – 1/2-1/2 – Handel, Horst – G48 1. c4 Nf6 2. Nc3 e6 3. d4 Bb4 4. e3 c5 5. Nf3 O-O 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. a3 Ba5 10. Qe2 a6
1958 YUG Ch 13th – Round 15 – Dimc, Dragutin – 0-1 – Karaklajic, Nikola – G80 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 Nbd7 9. a3 cxd4 10. exd4 Bxc3
1959 Asztalos Memorial – Round 5 – Beni, Alfred – 1/2-1/2 – Florian, Tibor – G22 1. d4 e6 2. Nf3 Nf6 3. c4 d5 4. Nc3 Bb4 5. e3 O-O 6. Bd3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. a3 cxd4 10. axb4 dxc3
1959 Kragujevac ch14-YUG – Round 1 – Lukic, Arsenije – 1/2-1/2 – Ugrinovic, Dragan – G19 1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 Nbd7 5. e3 Bb4 6. Bd3 c5 7. O-O dxc4 8. Bxc4 O-O 9. a3 cxd4 10. exd4 Be7
1959 Stevenson Memorial – Round 1 – Attard, Wilfred – 0-1 – Karaklajic, Nikola – G2 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 Nbd7 9. a3 cxd4 10. exd4 Bxc3
1960 Sao Paulo zt – Round 3 – Reinhardt, Enrique – 0-1 – Bolbochan, J. – G18 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 Nbd7 9. a3 Ba5 10. Qe2 a6
1961 Bled – Round 8 – Gligorić, Svetozar – 1/2-1/2 – Portisch, Lajos – G74 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 Nbd7 9. a3 cxd4 10. Nb5 Be7
1961 Bucharest GMT 5th – Round 6 – Gheorghiu, Florin – 1/2-1/2 – Mititelu, Gheorghe – G24 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 Nbd7 9. a3 cxd4 10. axb4 dxc3
1963 Leningrad ch-URS – Round 1 – Geller, Efim P – 1/2-1/2 – Kholmov, Ratmir D – G41 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 c5 6. Be2 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. a3 cxd4 10. axb4 dxc3
1963 UKR Ch – Round 10 – Lazarev, Efim M. – 1-0 – Ivanenko Bogdan – G64 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 Nbd7 9. a3 cxd4 10. exd4 Be7
1964 Belgrade – Round 14 – Larsen, Benjamin Holsko – 1-0 – Matanovic, Anto – G96 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 Nbd7 9. a3 cxd4 10. Nb5 Be7
1964 Pecs – Round 15 – Kozma, Julius – 1/2-1/2 – Gipslis, Aivars – G91 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 Nbd7 9. a3 cxd4 10. Nb5 Be7
1964 Tel Aviv olm fin-A – Round 13 – Portisch, Lajos – 1-0 – Unzicker, Wolfgang – G275 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 Nbd7 9. a3 cxd4 10. Qxd4 Be7
1964 Zuerich-J – Round ? – Eichhorn, Alfred – 0-1 – Kurajica, Bojan – G3 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 Nbd7 9. a3 Bxc3 10. bxc3 b6
1965 Candidats final – Round 4 – Spassky, Boris Vasily – 1/2-1/2 – Tal, Mikhail – G4 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 Nbd7 9. a3 cxd4 10. exd4 Bxc3
1965 Kiel Open – Round 10 – Mandel, Walter – 0-1 – Rellstab, Ludwig – G49 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 d5 6. Nf3 dxc4 7. Bxc4 O-O 8. O-O Nbd7 9. a3 Bxc3 10. bxc3 b6
1966 Bucharest Bucharest ROM – Round 15 – Ghitescu, Theodor – 1/2-1/2 – Pavlov, Mircea-Sergiu-Aurelian – G43 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nf3 O-O 6. Be2 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. a3 cxd4 10. axb4 dxc3
1966 Santa Monica – Round 9 – Najdorf, Miguel – 1/2-1/2 – Reshevsky, Samuel – G37 1. c4 Nf6 2. d4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 d5 6. Nf3 O-O 7. O-O Nbd7 8. a3 dxc4 9. Bxc4 Ba5 10. Bd3 Qe7
1967 URS-ch35 – Round 1 – Borisenko, Georgy K – 0-1 – Bagirov, Vladimir – 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 Nbd7 9. a3 cxd4 10. Nb5 Be7
1967 Venice Venice ITA – Round 3 – Evans, Larry M – 1/2-1/2 – Petrosian, Tigran V – G7 1. c4 Nf6 2. Nc3 e6 3. d4 Bb4 4. e3 c5 5. Nf3 O-O 6. Bd3 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. a3 cxd4 10. exd4 Bxc3
1968 Buenos Aires – Round 4 – Barrio Varas, Lucas – 0-1 – Najdorf, Miguel – G20 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 Nbd7 9. a3 Ba5 10. Qc2 cxd4
1969 New York ch-USA – Round 9 – Addison, Wiliam G – 1/2-1/2 – Zuckerman, Bernard – G47 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 Nbd7 9. a3 cxd4 10. exd4 Bxc3
1971 Hoogovens – Round 5 – Mecking, Henrique – 1/2-1/2 – Korchnoi, Viktor – G75 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 Nbd7 9. a3 cxd4 10. Qxd4 Bxc3
36. Olympiad 2004 – Round 12 – Aleksandrov, Aleksej – 1/2-1/2 – Adams, Michael – G418 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 Nbd7 9. a3 Ba5 10. Nb5 cxd4
40. Olympiad Open 2012 – Round 10.13 – Illescas Cordoba, Miguel – 1/2-1/2 – Banikas, Hristos – G543 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 Nbd7 9. a3 cxd4 10. axb4 dxc3
Corus 2001 – Round 6 – Kramnik, Vladimir – 1/2-1/2 – Anand, Viswanathan – 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 Nbd7 9. a3 cxd4 10. axb4 dxc3
FIDE WCh KO 2000 – Round 5.6 – Khalifman, Alexander – 1/2-1/2 – Anand, Viswanathan – G61 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 Nbd7 9. a3 cxd4 10. axb4 dxc3
FIDE WCh KO 2001 – Round 1.1 – Sarthou, Gaetan – 0-1 – Adams, Michael – G15 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 Nbd7 9. a3 Ba5 10. Qe2 a6
GpB 2003 – Round 5 – Lautier, Joel – 1/2-1/2 – Anand, Viswanathan – G17 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 Nbd7 9. a3 cxd4 10. axb4 dxc3
Interpolis 1984 – Round 1 – Miles, Anthony J – 1/2-1/2 – Ribli, Zoltan – G17 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 Nbd7 9. a3 cxd4 10. Qxd4 Bxc3
Luzern olm 1982 – Round 12 – Korchnoi, Viktor – 1-0 – Ljubojevic, Ljubomir – G52 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 Nbd7 9. a3 Bxc3 10. bxc3 b6
Olympiad 2002 – Round 9 – Aleksandrov, Aleksej – 0-1 – Adams, Michael – G289 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 Nbd7 9. a3 Ba5 10. Qe2 cxd4
World Rapid 2016 – Round 11.46 – Agdestein, Simen – 0-1 – Aleksandrov, Aleksej – G436 1. c4 e6 2. Nf3 d5 3. d4 Nf6 4. Nc3 Bb4 5. e3 O-O 6. Bd3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. a3 cxd4 10. axb4 dxc3
XXIII SuperGM 2006 – Round 3 – Aronian, Levon – 1/2-1/2 – Topalov, Veselin – G10 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 Nbd7 9. a3 cxd4 10. axb4 dxc3

E55b — Main Line Bronstein

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 Nbd7 9.a3

Eval: [+0.23]

Les coups candidats

9…cxd4 — 61.1% (527 parties)

Ambassadeurs : Kholmov, Ratmir D (9x), Lukacs, Peter (7x), Farago, Ivan (7x), Gipslis, Aivars (5x), Andersson, Ulf (5x), Macieja, Bartlomiej (5x), Sciarretta, Robert W (5x), Junge, Wolfgang (5x)

9…Ba5 — 25.5% (220 parties)

Ambassadeurs : Van der Stricht, Geert (7x), Adams, Michael (6x), Aleksandrov Ivanchev, Aleksandar (4x), Korobov, Anton (4x), Almási, Zoltán (3x), Schmidt, Loren R (3x), Gormally, Daniel W (3x), Najdorf, Miguel (2x)

9…Bxc3 — 13.3% (115 parties)

Ambassadeurs : Reshevsky, Samuel (2x), Bisguier, Arthur B (2x), Lenic, Luka (2x), Le Roux, Jean-Pierre (2x), Sevian, Samuel (2x), Timofejeva, Lidija (1x), Keller-Hermann, Edith (1x), Niemela, Antti (1x)

9…Bxa3 — 0.1% (1 parties)

Ambassadeurs : Hoang, Thi Bao Tram (1x), Kosteniuk, Alexandra (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	9…cxd4	9…Ba5	9…Bxc3	9…Bxa3
<1800	8	62%	—	38%	—
1800-2200	167	64%	20%	16%	—
2200-2600	461	57%	30%	12%	0%
2600+	58	48%	40%	12%	—

Évolution par décennie (% des parties)

Décennie	N parties	9…cxd4	9…Ba5	9…Bxc3	9…Bxa3
1950s	41	80%	5%	15%	—
1960s	42	76%	17%	7%	—
1970s	44	93%	7%	—	—
1980s	28	82%	11%	7%	—
1990s	54	74%	7%	19%	—
2000s	260	65%	26%	9%	0%
2010s	356	49%	35%	16%	—
2020s	38	37%	26%	37%	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
9…cxd4	49%	37%	▼ -12.6%
9…Ba5	35%	26%	▼ -8.5%
9…Bxc3	16%	37%	▲ +21.1%
9…Bxa3	0%	0%	+0.0%

Joueurs célèbres

Champions du monde dans cette position

Tal, Mikhail — 4 parties
Anand, Viswanathan — 4 parties
Carlsen, Magnus — 2 parties
Euwe, Max — 1 partie
Botvinnik, Mikhail — 1 partie
Smyslov, Vladimir — 1 partie
Kramnik, Vladimir — 1 partie

Parties historiques

9…cxd4 — 61.1% (527 parties)

1953 — Keres, Paul Petrovich vs Euwe, Max — 1/2-1/2 — Zurich SUI
1953 — Sherwin, James T vs Ivkov, Borislav — 1-0 — Copenhagen DEN
1955 — Foldi, Jozsef vs Sahlberg, Erkki — 1-0 — Lyon FRA
1955 — Averbakh, Yuri L vs Botvinnik, Mikhail — 1/2-1/2 — ?
1956 — Petrosian, Tigran A. vs Djurasevic, Bozidar — 1/2-1/2 — Belgrade SRB

9…Ba5 — 25.5% (220 parties)

1958 — Gurgenidze, Bukhuti vs Handel, Horst — 1/2-1/2 — Varna BUL
1958 — Osnos, Viatcheslav vs Grushevsky, Alexander — 1-0 — Tashkent ch URS sf
1960 — Lutikov, Anatoly S vs Nezhmetdinov, Rashid — 1/2-1/2 — Perm RUS
1960 — Reinhardt, Enrique vs Bolbochan, J. — 0-1 — Sao Paulo BRA
1965 — Herzog, Franz vs Koester, Hans Dieter — 0-1 — Kiel GER

9…Bxc3 — 13.3% (115 parties)

1956 — Niemela, Antti vs Lungkvist L — 0-1 — olm Moscow RUS
1957 — Timofejeva, Lidija vs Keller-Hermann, Edith — 0-1 — Emmen
1957 — Reshevsky, Samuel vs Bisguier, Arthur B — 1-0 — m
1957 — Reshevsky, Samuel vs Bisguier, Arthur B — 1-0 — New York, NY USA
1957 — Cherepkov, Alexander V vs Zilber, Israel — 1-0 — Leningrad RUS

9…Bxa3 — 0.1% (1 parties)

2008 — Hoang, Thi Bao Tram vs Kosteniuk, Alexandra — 1-0 — Beijing CHN

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