E57a — Nimzo-Indian: Main Line, 9.Bxc4 cxd4

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O Nc6 8.a3 dxc4 9.Bxc4 cxd4 * ○ Trait aux Blancs

Ouverture — Tension centrale

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plan principal. Exploiter la case forte b5.

Atouts. Les Blancs s'appuient sur la case forte b5, un fou actif en c4, la paire de fous et la colonne semi-ouverte d.

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).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plan principal. Exploiter la case forte d5.

Atouts. Les Noirs s'appuient sur une majorité de pions à l'centre (2 contre 1), la case forte d5, un avant-poste en d5, un fou actif en b4 et la paire de fous.

Côté adverse. Le fou enfermé en c1.

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

Plans. ...Bd7 (PRIORITÉ: libérer le Bc8 (...Bd7, b6+Bb7, ...Bg4, ...Bf5)) ; ...Na5 (Attaquer Bc4) ; ...d3 (Rupture) ; ...e5 (Rupture).

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

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

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● b5 (2v0)	● d5 (3v2)
Cases faibles	—	—
Centre	● d4 (3v2)	● d5 (3v2)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Ouvertes	● c	● c
Semi-ouvertes	● d	—

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 1)
Bc4	● Bc4 Actif (mob. 8)
Bb4		● Bb4 Actif (mob. 6)
Bc8		● Bc8 Non développé (mob. 1)
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	tension
Ruptures	● e3-e4	● …d4-d3, ● …e6-e5

Partie
1905 It (Men) Stockholm SWE – Round 7 – Rubinstein, Akiba – 1/2-1/2 – Marchand, Max – G23 1. d4 e6 2. Nf3 d5 3. c4 c5 4. e3 Nf6 5. a3 cxd4 6. exd4 Nc6 7. Nc3 Be7 8. Bd3 O-O 9. O-O dxc4 10. Bxc4 a6
1911 Karlsbad – Round 1 – Chajes, Oscar – 1/2-1/2 – Salwe, George – G12 1. c4 e6 2. d4 d5 3. e3 Nf6 4. Nc3 c5 5. Nf3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 O-O 9. O-O dxc4 10. Bxc4 b6
1938 FRA Ch – Round 8 – Fallet Kahn, Victor – 1/2-1/2 – Anglares, E. – G20 1. Nf3 d5 2. d4 e6 3. c4 c5 4. e3 cxd4 5. exd4 Nf6 6. Nc3 Be7 7. Bd3 Nc6 8. O-O O-O 9. a3 dxc4 10. Bxc4 a6
1949 Budapest-Moscow – Round 12 – Simagin, Vladimir – 1-0 – Szabo, Laszlo – G89 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. e3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O b6
1949 URS Ch, semi final – Round 1 – Kasparian, Genrikh – 1-0 – Aramanovich, I – G6 1. d4 d5 2. c4 e6 3. Nc3 c5 4. e3 Nf6 5. Nf3 Nc6 6. Be2 dxc4 7. Bxc4 Be7 8. O-O O-O 9. a3 cxd4 10. exd4 Qc7
1950 Mar del Plata – Round 13 – Guimard, Carlos E – 1/2-1/2 – Trifunovic, Petar – G106 1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 c5 5. e3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O b6
1950 YUG-USA m radio – Round 2.3 – Trifunovic, Petar – 1/2-1/2 – Horowitz, Albert Israel – G12 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. e3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O a6
1951 Hungary Ch – Round 20 – Florian, Tibor – 1-0 – Pogats, Jozsef Jr. – G70 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. e3 c5 5. Nc3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O a6
1951 Mar del Plata zt – Round 7 – Guimard, Carlos E – 1/2-1/2 – Maderna, Carlos – G64 1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 c5 5. e3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O b6
1952 Hungary Ch – Round 13 – Szily, Jozsef – 0-1 – Florian, Tibor – G15 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 e6 6. Nf3 Be7 7. Bd3 O-O 8. O-O Nc6 9. a3 dxc4 10. Bxc4 Bd7
1952 OWL Ch – Round 4 – Koehler, Adalbert – 0-1 – Lachmann, Hans G – G10 1. d4 d5 2. c4 e6 3. e3 Nf6 4. Nc3 c5 5. Nf3 Nc6 6. Be2 cxd4 7. exd4 Be7 8. O-O O-O 9. a3 dxc4 10. Bxc4 Qc7
1953 GDR Ch – Round 6 – Schlieder, Rolf – 1-0 – Pallwitz, Otto – G17 1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 c5 5. e3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O Nd5
1953 Hastings ch-BCF – Round 10 – Harris Mateu, Gido – 0-1 – Aabel Thomas Eapen – G87 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. e3 Nc6 6. Bd3 dxc4 7. Bxc4 Be7 8. O-O O-O 9. a3 cxd4 10. exd4 a6
1953 Mar del Plata – Round 5 – Guimard, Carlos E – 1/2-1/2 – Maderna, Carlos – G69 1. d4 Nf6 2. Nf3 e6 3. c4 d5 4. Nc3 c5 5. e3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O b6
1955 Budapest – Round 1 – Petrosian, Tigran A. – 1/2-1/2 – Bilek, Istvan – G5 1. c4 Nf6 2. Nc3 c5 3. Nf3 e6 4. e3 d5 5. d4 cxd4 6. exd4 Be7 7. Bd3 O-O 8. O-O Nc6 9. a3 dxc4 10. Bxc4 a6
1955 Moscow Ch – Round 1 – Gusev, Yuri – 1-0 – Estrin, Yakov – G3 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. e3 c5 5. Nc3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O b6
1955 Prague tm – Round 5 – Alster, Ladislav – 1-0 – Florian, Tibor – G26 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 c5 5. e3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O a6
1955 USSR – Round 1 – Shestoperov, Aleksej – 1-0 – Mikenas, Vladas – G7 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. e3 cxd4 6. exd4 Be7 7. Bd3 O-O 8. O-O Nc6 9. a3 dxc4 10. Bxc4 b6
1956 Alekhine Memorial – Round 1 – Stahlberg, Gideon – 1/2-1/2 – Szabo, Ladislav – G82 1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. e3 c5 5. Nc3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O b6
1956 Candidats Tournament – Round 7 – Spassky, Boris Vasily – 0-1 – Geller, Efim P – G29 1. d4 d5 2. c4 e6 3. Nc3 c5 4. e3 Nf6 5. Nf3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O a6
1956 Leningrad ch-URS – Round 1 – Spassky, Boris Vasily – 1/2-1/2 – Bannik, Anatolij – G53 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 Be7 5. e3 O-O 6. Bd3 c5 7. O-O Nc6 8. a3 cxd4 9. exd4 dxc4 10. Bxc4 b6
1957 FRG Ch Bad Neuenahr – Round 15 – Darga, Klaus – 1/2-1/2 – Hodakowsky, Georg – G42 1. c4 Nf6 2. Nc3 c6 3. e4 d5 4. exd5 cxd5 5. d4 e6 6. Nf3 Be7 7. Bd3 O-O 8. O-O Nc6 9. a3 dxc4 10. Bxc4 a6
1957 Wageningen zt – Round 14 – Szabo, Ladislav – 1/2-1/2 – Larsen, Benjamin Holsko – G39 1. d4 d5 2. c4 e6 3. Nc3 c5 4. e3 Nf6 5. Nf3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O a6
1958 It Kienbaum GER – Round 3 – Neikirkh, Oleg – 1/2-1/2 – Bertholdt, Dieter – G4 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. d4 d5 5. e3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O b6
1958 Munich olm fin-C – Round 3 – Romani, Elio – 1/2-1/2 – Aitken, James – G6 1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. e3 c5 5. Nc3 Nc6 6. Bd3 dxc4 7. Bxc4 cxd4 8. exd4 Be7 9. O-O O-O 10. a3 a6
1959 HUN Ch – Round 6 – Florian, Tibor – 1/2-1/2 – Szabo, Laszlo – G4 1. d4 Nf6 2. Nf3 e6 3. c4 c5 4. e3 d5 5. Nc3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O b6
1960 Asuncion – Round 1 – Letelier Martner, Rene – 1/2-1/2 – Szabo, Ladislav – G26 1. e4 c6 2. c4 d5 3. exd5 cxd5 4. d4 Nf6 5. Nc3 e6 6. Nf3 Be7 7. Bd3 O-O 8. O-O Nc6 9. a3 dxc4 10. Bxc4 b6
1960 BUL-ch14 Sofia BUL – Round 17 – Kolarov, Atanas S. – 1-0 – Radev, Nikolai – G63 1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. e3 c5 5. d4 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O b6
1960 Leipzig olm prel – Round 2 – Letelier Martner, Rene – 1-0 – O'Kelly, Albéric de Galway – G54 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. e3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O b6
1960 Ljubljana – Round 16 – Damjanovic, Marko – 1-0 – Ruffne Toth, Andrea – G105 1. d4 d5 2. c4 c5 3. e3 cxd4 4. exd4 e6 5. Nf3 Nf6 6. Nc3 Be7 7. Bd3 dxc4 8. Bxc4 Nc6 9. O-O O-O 10. a3 a6
1960 Sao Paulo zt – Round 18 – Reinhardt, Enrique – 1/2-1/2 – Letelier Martner, Rene – G89 1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. e3 c5 5. d4 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O b6
1960 Sarajevo – Round 6 – Udovcic, Mijo – 0-1 – Matulovic, Milan – G37 1. d4 Nf6 2. c4 c5 3. e3 e6 4. Nf3 d5 5. Nc3 Nc6 6. Bd3 dxc4 7. Bxc4 Be7 8. O-O O-O 9. a3 cxd4 10. exd4 b6
1961 Budapest-Leningrad m – Round 2.6 – Osnos, Viatcheslav – 1/2-1/2 – Dely, Peter – G9 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. e3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O a6
1962 Capablanca Memorial – Round 9 – De Greiff, B. – 0-1 – Gligoric, Sofija – G85 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. e3 d5 5. Nc3 Nc6 6. Bd3 cxd4 7. exd4 dxc4 8. Bxc4 Be7 9. O-O O-O 10. a3 Nd5
1962 URS-JUG2 – Round ? – Borisenko, Georgy K – 1/2-1/2 – Jovanovic, Mirjana – G14 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 Nc6 9. a3 cxd4 10. axb4 dxc3
1962 Varna olm – Round 9 – Kolarov, Atanas S. – 1/2-1/2 – Pachman, Ludek – G202 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. e3 d5 5. Nc3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O a6
1963 Budapest ch-HUN – Round 1 – Forintos, Gyozo V – 0-1 – Somogyi, Istvan – G81 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 c5 5. e3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O a6
1963 Hoogovens-C – Round 4 – Saemisch, Friedrich – 0-1 – Van Seters, Frits – G12 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. e3 d5 5. Nc3 Nc6 6. Bd3 dxc4 7. Bxc4 a6 8. a3 cxd4 9. exd4 Be7 10. O-O O-O
1964 Bordeaux Open Bordeaux FRA – Round 10 – Clarke, Peter H – 0-1 – Darga, Klaus – G66 1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 c5 5. e3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 O-O 9. O-O dxc4 10. Bxc4 b6
1964 Bordeaux Open Bordeaux FRA – Round 8 – Chaude de Silans, Chantal – 1/2-1/2 – Durão, Joaquim Manuel – G49 1. d4 e6 2. c4 Nf6 3. Nc3 d5 4. e3 c5 5. Nf3 Nc6 6. Bd3 cxd4 7. exd4 Be7 8. O-O O-O 9. a3 dxc4 10. Bxc4 a6
1964 Chigorin Memorial – Round 11 – Gheorghiu, Florin – 1/2-1/2 – Spassky, Boris Vasily – G73 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. e3 d5 5. Nc3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O a6
1964 Chigorin Memorial – Round 7 – Lein, Anatoly – 1-0 – Forintos, Gyozo V – G44 1. d4 Nf6 2. c4 c5 3. Nf3 e6 4. e3 d5 5. Nc3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O a6
1964 Corr – Round 1 – Koblencs, Alexander – 1/2-1/2 – Kubel, H. – G3 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 c5 5. e3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O a6
1964 Kiev ch-URS – Round 1 – Stein, Leon Rico – 1-0 – Peterson, Andreas – G5 1. c4 c5 2. Nf3 Nc6 3. Nc3 Nf6 4. e3 e6 5. d4 d5 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O b6
1964 Memorial M.Chigorin – Round 14 – Garcia Gonzalez, Gonzalo – 0-1 – Lein, Anatoly – G11 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. e3 c5 5. Nc3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O b6
1965 Aalborg – Round 1 – Jakobsen, Ole – 1/2-1/2 – Holm, Sejer – G57 1. Nf3 e6 2. c4 Nf6 3. d4 c5 4. Nc3 d5 5. e3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O b6
1965 Kiel Open – Round 13 – Kestler, Hans-Guenther – 1-0 – Heil, Siegfried – G62 1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 c5 5. e3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O a6
1965 Klasterec nad Orlici U18 6566 – Round 3 – Treybal, Dusan – 0-1 – Plachetka, Jan – G7 1. d4 d5 2. c4 e6 3. Nc3 c5 4. e3 Nf6 5. Nf3 Nc6 6. Bd3 Be7 7. a3 cxd4 8. exd4 dxc4 9. Bxc4 O-O 10. O-O b6
1965 Mar del Plata – Round 4 – Bielicki, Carlos – 1/2-1/2 – Averbakh, Yuri L – G32 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. e3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O b6
1965 Yerevan – Round 12 – Stahlberg, G. – 1/2-1/2 – Kortchnoi, V. – G64 1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 c5 5. e3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 O-O 9. O-O dxc4 10. Bxc4 Qc7
1965 Zinnowitz GER – Round 11 – Moehring, Guenther – 0-1 – Szilagyi, Gyorgy Laszlo – G22 1. c4 e6 2. d4 d5 3. Nf3 c5 4. e3 Nf6 5. Nc3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O b6
1966 Aarhus – Round 10 – Pedersen, Eigil – 1-0 – Kolbak, Jens – G53 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 e6 6. Nf3 Be7 7. Bd3 O-O 8. O-O dxc4 9. Bxc4 Nc6 10. a3 b6
1966 Aarhus – Round 11 – Blom, Kaj – 0-1 – Holm, Sejer – G58 1. d4 Nf6 2. c4 e6 3. Nc3 c5 4. Nf3 d5 5. e3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O b6
1966 La Habana olm fin-A – Round 4 – Al Tal, Ammar – 1-0 – Brinck-Claussen, Bjorn – G79 1. Nf3 Nf6 2. c4 c5 3. Nc3 Nc6 4. e3 e6 5. d4 d5 6. a3 cxd4 7. exd4 Be7 8. Bd3 O-O 9. O-O dxc4 10. Bxc4 b6
1966 Rio Hondo zt – Round 14 – Quinones Carrillo, Oscar – 0-1 – Emma, Jaime – G85 1. Nf3 Nf6 2. c4 e6 3. e3 d5 4. Nc3 c5 5. d4 Nc6 6. Bd3 cxd4 7. exd4 dxc4 8. Bxc4 Be7 9. O-O O-O 10. a3 b6
1967 Moscow – Round 1 – Filip, Marius Liviu – 1/2-1/2 – Spassky, Boris V. – G36 1. d4 Nf6 2. c4 c5 3. Nf3 e6 4. e3 d5 5. Nc3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O b6
1967 October Revolution 50 – Round 1 – Gufeld, Eduard – 1/2-1/2 – Suetin, Alexey S – G9 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. e3 Nc6 5. d4 d5 6. a3 a6 7. Be2 dxc4 8. Bxc4 cxd4 9. exd4 Be7 10. O-O O-O
1968 Cardenas/Matanzas/Santa Clara – Round 3 – Cobo Arteaga, Eldis – 0-1 – Pena Felix, Gustavo Adolfo – G16 1. d4 d5 2. c4 e6 3. Nc3 c5 4. e3 Nf6 5. Nf3 Nc6 6. Bd3 dxc4 7. Bxc4 cxd4 8. exd4 Be7 9. O-O O-O 10. a3 a6
1968 Lugano ol (Men) qual-A – Round 1 – De Winter, Isidor – 1-0 – Giustolisi, Alberto – G5 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. e3 d5 5. Nc3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O Qc7
1968 Monte Carlo – Round 3 – Benko, Pal – 1/2-1/2 – Forintos, Gyozo V – G16 1. c4 c5 2. Nf3 Nc6 3. e3 Nf6 4. d4 cxd4 5. exd4 d5 6. Nc3 e6 7. a3 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O a6
1968 Palma de Mallorca – Round 3 – Spassky, Boris Vasily – 1-0 – Ivkov, Borislav – G35 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 e6 6. Nf3 Be7 7. Bd3 dxc4 8. Bxc4 O-O 9. O-O Nc6 10. a3 a6
1968 Skopje/Ohrid – Round 10 – Polugaevsky, Lev – 1-0 – Gheorghiu, Florin – G81 1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 c5 5. cxd5 Nxd5 6. e3 Nc6 7. Bc4 cxd4 8. exd4 Bb4 9. Qd3 O-O 10. O-O Nf6
1969 Netanya – Round 5 – Kavalek, Lubomir – 1-0 – Kagan, Shimon – G38 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 e6 5. Nf3 Nf6 6. Nc3 Be7 7. Bd3 O-O 8. O-O dxc4 9. Bxc4 Nc6 10. a3 a6
1969 Nordiska masterskapen - Lidkoping – Round 9 – Drimer, Dolfi – 0-1 – Thorbergsson, Freysteinn – G8 1. e4 d5 2. exd5 Nf6 3. c4 c6 4. d4 cxd5 5. Nc3 e6 6. Nf3 Be7 7. Bd3 dxc4 8. Bxc4 O-O 9. O-O Nc6 10. a3 b6
1970 Palma de Mallorca Interzonal – Round 7 – Jimenez Zerquera, Eleazar – 1/2-1/2 – Ivkov, Borislav – G77 1. d4 Nf6 2. c4 c5 3. Nf3 e6 4. e3 d5 5. Nc3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O a6
1972 Skopje ol (Men) fin-A – Round 5 – Debarnot, Roberto – 1/2-1/2 – Trapl, Jindrich – G127 1. d4 Nf6 2. c4 c5 3. Nf3 e6 4. e3 d5 5. Nc3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O a6
Brussels blitz 1987 – Round 1 – Kasparov, Garry – 1-0 – Larsen, Bent – G99 1. Nf3 Nf6 2. c4 c5 3. Nc3 Nc6 4. e3 e6 5. d4 d5 6. a3 cxd4 7. exd4 Be7 8. Bd3 O-O 9. O-O dxc4 10. Bxc4 b6
Olympiad 2002 – Round 6 – Aleksandrov, Aleksej – 1-0 – Andersson, Ulf 1949 – G180 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nf3 d5 7. O-O dxc4 8. Bxc4 O-O 9. a3 cxd4 10. axb4 dxc3
World Blitz 2015 – Round 3.78 – Ernst, Sipke – 1-0 – Van Wely, Loek – G204 1. d4 Nf6 2. Nf3 e6 3. c4 d5 4. e3 c5 5. a3 cxd4 6. exd4 Nc6 7. Nc3 Be7 8. Bd3 dxc4 9. Bxc4 O-O 10. O-O b6
World Blitz 2017 – Round 12.56 – Rakhmanov, Aleksandr – 1-0 – Omar, Noaman – G652 1. c4 e6 2. d4 d5 3. Nc3 Be7 4. e3 Nf6 5. Nf3 O-O 6. Bd3 c5 7. O-O cxd4 8. exd4 dxc4 9. Bxc4 Nc6 10. a3 a6

E57a — Main Line

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O Nc6 8.a3 dxc4 9.Bxc4 cxd4

Les coups candidats

10.exd4 — 76.2% (64 parties) →

Ambassadeurs : Najdorf, Miguel (3x), Reshevsky, Samuel (2x), Ragozin, Viacheslav (1x), Bastrikov, Georgy (1x), Goldberg, Grigory A (1x), Sidorov, Anatoly (1x), Goldenberg, Richard (1x), Vacca, Georges (1x)

10.axb4 — 22.6% (19 parties)

Ambassadeurs : Borisenko, Georgy K (1x), Jovanovic, Mirjana (1x), Heemskerk, Fenny (1x), Kokanovic, Dobrilo (1x), Jedlicka, Ales (1x), Puobis, Jozef (1x), Aleksandrov Ivanchev, Aleksandar (1x), Andersson, Ulf (1x)

10.Bd3 — 1.2% (1 parties)

Ambassadeurs : Meza Pomar, Aroa (1x), O'Kelly, A. (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	10.exd4	10.axb4	10.Bd3
<1800	3	33%	67%	—
1800-2200	25	64%	36%	—
2200-2600	18	89%	11%	—
2600+	2	50%	50%	—

Évolution par décennie (% des parties)

Décennie	N parties	10.exd4	10.axb4	10.Bd3
1930s	1	100%	—	—
1950s	7	100%	—	—
1960s	6	50%	33%	17%
1970s	5	100%	—	—
1980s	4	100%	—	—
1990s	12	100%	—	—
2000s	24	75%	25%	—
2010s	21	52%	48%	—
2020s	4	75%	25%	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
10.exd4	52%	75%	▲ +22.6%
10.axb4	48%	25%	▼ -22.6%
10.Bd3	0%	0%	+0.0%

Parties historiques

10.exd4 — 76.2% (64 parties)

1938 — Ragozin, Viacheslav vs Bastrikov, Georgy — 1-0 — Leningrad RUS
1952 — Rabar, Braslav vs De Souza Mendes, Joao — 1-0 — Vienna AUT
1952 — Najdorf, Miguel vs Reshevsky, Samuel — 1-0 — ?
1953 — Najdorf, Miguel vs Reshevsky, Samuel — 1-0 — Buenos Aires ARG
1954 — Goldberg, Grigory A vs Sidorov, Anatoly — 1-0 — Riga LAT

10.axb4 — 22.6% (19 parties)

1962 — Borisenko, Georgy K vs Jovanovic, Mirjana — 1/2-1/2 — Lvov UKR
1967 — Heemskerk, Fenny vs Kokanovic, Dobrilo — 1-0 — Beverwijk NED
2000 — Jedlicka, Ales vs Puobis, Jozef — 1-0 — Tatranske Zruby SVK
2002 — Aleksandrov Ivanchev, Aleksandar vs Andersson, Ulf — 1-0 — Bled SLO
2002 — Hudec, Jan vs Sukuba, Zdenko — 0-1 — Slovakia

10.Bd3 — 1.2% (1 parties)

1968 — Meza Pomar, Aroa vs O'Kelly, A. — 1/2-1/2 — Lugano SUI

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