E56d — Nimzo-Indian: Main Line, 7…Nc6 8.a3 Ba5

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 Ba5 * ○ 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 les cases fortes b5 et e5, un fou actif en d3 et la paire de fous.

Côté adverse. Le fou enfermé en c8 et une pièce en prise (le pion en c5).

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

Atouts. Les Noirs s'appuient sur un avant-poste en e4, un fou actif en a5 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)) ; ...Bg4 (Clouer Nf3) ; ...e5 (Rupture).

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● b2→a3, f2→e3, e3→d4	● e6→d5, f7→e6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● b5 (2v0), ● e5 (2v1)	—
Cases faibles	● e4	—
Centre	● e5 (2v1)	● d5 (3v2)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 1)
Bd3	● Bd3 Actif (mob. 7)
Ba5		● Ba5 Actif (mob. 4)
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	fermé
Ruptures	● e3-e4	● …e6-e5

Partie
1939 Leningrad/Moscow – Round 3 – Reshevsky, Samuel – 1/2-1/2 – Levenfish, Grigory – G21 1. d4 e6 2. c4 Nf6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nc6 8. a3 Ba5 9. Na4 cxd4 10. exd4 dxc4
1952 URS Ch sf – Round ? – Kuzminykh, Evgeny – 1-0 – Khasin, Abram – G6 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nf3 O-O 7. O-O d5 8. a3 Ba5 9. h3 Qe7 10. Qc2 dxc4
1954 Bucharest – Round 16 – Kluger, Carsten – 1/2-1/2 – Troianescu, Octav – G135 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O Nc6 8. a3 Ba5 9. Re1 a6 10. dxc5 dxc4
1954 Mar del Plata – Round 5 – Shocron, Ruben – 1/2-1/2 – Perez Alcocer, Jose – G38 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O Nc6 8. a3 Ba5 9. Na4 dxc4 10. Bxc4 cxd4
1954 Prague zt Prague CZE – Round 12 – Uhlmann, Wolfgang – 1/2-1/2 – Minev, Nikolay N – G42 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 d5 6. Nf3 Nc6 7. O-O O-O 8. a3 Ba5 9. dxc5 Bxc3 10. bxc3 Qa5
1955 CSR Ch – Round 17 – Jezek, Jaroslav – 1/2-1/2 – Kozma, Julius – G132 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nc6 8. a3 Ba5 9. Ne2 cxd4 10. exd4 Bc7
1955 Long Beach US-open – Round 10 – Reshevsky, Samuel – 1-0 – Sandrin, Albert – G55 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O Nc6 8. a3 Ba5 9. h3 a6 10. cxd5 exd5
1956 Danmarksmesterskabet – Round 9 – Pedersen, Eigil – 1/2-1/2 – Enevoldsen, Jens – G20 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O Nc6 8. a3 Ba5 9. Na4 cxd4 10. exd4 dxc4
1956 New York Rosenwald5556 – Round ? – Reshevsky, Samuel – 1-0 – Evans, Larry M – G24 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nc6 8. a3 Ba5 9. h3 a6 10. cxd5 exd5
1957 Leningrad Ch – Round 1 – Bykov, Vladimir – 1-0 – Cherepkov, Alexander V – G1 1. c4 Nf6 2. Nc3 e6 3. d4 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nf3 d5 7. O-O O-O 8. a3 Ba5 9. dxc5 Bxc3 10. bxc3 e5
1958 Riga ch-URS – Round 1 – Spassky, Boris V. – 1-0 – Krogius, Nikolai V – G29 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. e3 O-O 6. Bd3 d5 7. O-O Nc6 8. a3 Ba5 9. Ne2 dxc4 10. Bxc4 Bb6
1958 URS Ch sf – Round ? – Korchnoi, Viktor – 1-0 – Vladimirov, Boris T – G31 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O Nc6 8. a3 Ba5 9. h3 Qe7 10. Qe2 Rd8
1958 WchT U26 fin-A 05th – Round 6 – Spassky, Boris V. – 1/2-1/2 – Kozma, Julius – G60 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nc6 8. a3 Ba5 9. Ne2 cxd4 10. exd4 dxc4
1960 Leningrad ch-URS – Round 9 – Taimanov, Mark E – 1/2-1/2 – Krogius, Nikolai V – G77 1. c4 Nf6 2. Nc3 e6 3. d4 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nc6 8. a3 Ba5 9. h3 cxd4 10. exd4 dxc4
1961 Moskou – Round 1 – Borisenko, Georgy K – 0-1 – Cherepkov, Alexander V – G36 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nf3 O-O 6. Bd3 d5 7. O-O Nc6 8. a3 Ba5 9. h3 Qe7 10. Qe2 dxc4
1962 Erevan ch-URS – Round 1 – Khodos, German – 1/2-1/2 – Krogius, Nikolai V – G38 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 c5 6. Bd3 d5 7. O-O Nc6 8. a3 Ba5 9. Ne2 cxd4 10. exd4 dxc4
1963 Alekhine Memorial – Round 10 – Simagin, Vladimir – 0-1 – Hort, Vlastimil – G65 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. e3 O-O 6. Bd3 d5 7. O-O Nc6 8. a3 Ba5 9. Ne2 dxc4 10. Bxc4 Qe7
1963 Budapest ch-HUN – Round 1 – Portisch, Lajos – 1/2-1/2 – Barczay, Laszlo – G72 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O Nc6 8. a3 Ba5 9. h3 dxc4 10. Bxc4 Qe7
1963 Budapest ch-HUN – Round 1 – Somogyi, Istvan – 0-1 – Barczay, Laszlo – G74 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O Nc6 8. a3 Ba5 9. Na4 cxd4 10. exd4 dxc4
1963 Sochi – Round 10 – Kozma, Julius – 1/2-1/2 – Krogius, Nikolai V – G57 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nc6 8. a3 Ba5 9. h3 Qe7 10. Ne2 dxc4
1965 Capablanca Memorial – Round 9 – Szabo, Ladislav – 1/2-1/2 – Ivkov, Borislav – G89 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nf3 O-O 6. Bd3 d5 7. O-O Nc6 8. a3 Ba5 9. Rb1 dxc4 10. Bxc4 Qe7
1965 Reggio Emilia 6566 08th – Round 4 – Beggi, Pierluigi – 0-1 – Parma, Bruno – G9 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O Nc6 8. a3 Ba5 9. Ne2 cxd4 10. exd4 dxc4
1965 Zagreb – Round 14 – Antoshin, Vladimir S – 1/2-1/2 – Udovcic, Mijo – G139 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nf3 d5 7. O-O O-O 8. a3 Ba5 9. Ne2 cxd4 10. exd4 dxc4
1967 Halle zt – Round 7 – Kristinsson, Jon – 1-0 – Kinnmark, Ove – G28 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O Nc6 8. a3 Ba5 9. Na4 dxc4 10. Bxc4 cxd4
36. Olympiad 2004 – Round 4 – Graf, Adrian – 1/2-1/2 – Pelletier, Yannick – G111 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O Nc6 8. a3 Ba5 9. h3 Qe7 10. Qc2 dxc4
Interpolis 1987 – Round ? – Korchnoi, Viktor – 1-0 – Ljubojevic, Ljubomir – G34 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nc6 8. a3 Ba5 9. h3 dxc4 10. Bxc4 Bd7
TCh-RUS 2005 – Round 6 – Iljushin, Alexei – 0-1 – Aronian, Levon – G92 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nc6 8. a3 Ba5 9. dxc5 Bxc3 10. bxc3 e5
World Championship 28th – Round 1 – Spassky, Boris V. – 1-0 – Fischer, Robert James James – G1 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. e3 O-O 6. Bd3 c5 7. O-O Nc6 8. a3 Ba5 9. Ne2 dxc4 10. Bxc4 Bb6
World Championship 28th 1972 – Round 1 – Spassky, Boris V. – 1-0 – Fischer, Robert James James – G1 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. e3 O-O 6. Bd3 c5 7. O-O Nc6 8. a3 Ba5 9. Ne2 dxc4 10. Bxc4 Bb6

E56d — 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 Ba5

Eval: [+0.25]

Les coups candidats

9.cxd5 — 50.1% (279 parties) →

Ambassadeurs : Tal, Mikhail (5x), Mason, Ian J (5x), Cherepkov, Alexander V (4x), Kinnmark, Ove (4x), Landa, Konstantin (4x), Szabo, Laszlo (3x), Kozma, Julius (3x), Gligorić, Svetozar (3x)

9.h3 — 20.1% (112 parties)

Ambassadeurs : Krogius, Nikolai V (3x), Mason, Ian J (3x), Potkin, Vladimir (3x), Saiyn, Zhanat (3x), Peralta, Fernando (3x), Cherepkov, Alexander V (2x), Korchnoi, Viktor (2x), Reshevsky, Samuel (2x)

9.Ne2 — 14.5% (81 parties)

Ambassadeurs : Kashlinskaya, Alina (4x), Krogius, Nikolai V (3x), Kozma, Julius (3x), Spassky, Boris V. (3x), Khodos, German (2x), Petrosian, Tigran V. (1x), Tolush, Alexander V (1x), Petrosian, Tigran A. (1x)

9.dxc5 — 7.0% (39 parties)

Ambassadeurs : Mega IV (3x), ? (3x), Lim, Seng Hoo (2x), Bykov, Vladimir (1x), Cherepkov, Alexander V (1x), Uhlmann, Wolfgang (1x), Minev, Nikolay N (1x), Delmar, Gabriel (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	9.cxd5	9.h3	9.Ne2	9.dxc5
<1800	4	25%	—	25%	25%
1800-2200	104	58%	14%	12%	12%
2200-2600	278	43%	27%	15%	5%
2600+	24	42%	29%	8%	8%

Évolution par décennie (% des parties)

Décennie	N parties	9.cxd5	9.h3	9.Ne2	9.dxc5
1930s	2	50%	—	—	—
1950s	41	59%	12%	15%	7%
1960s	47	55%	15%	19%	2%
1970s	31	55%	6%	29%	6%
1980s	38	61%	13%	11%	11%
1990s	40	55%	10%	20%	5%
2000s	109	43%	22%	15%	8%
2010s	236	47%	27%	12%	6%
2020s	13	54%	8%	8%	23%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
9.cxd5	47%	54%	▲ +6.4%
9.h3	27%	8%	▼ -19.4%
9.Ne2	12%	8%	▼ -4.2%
9.dxc5	6%	23%	▲ +16.7%

Joueurs célèbres

Champions du monde dans cette position

Tal, Mikhail — 5 parties
Smyslov, Vladimir — 1 partie
Botvinnik, Mikhail — 1 partie
Hou, Yifan — 1 partie

Parties historiques

9.cxd5 — 50.1% (279 parties)

1939 — Landau, Salo vs Flohr, Salo — 1-0 — Bournemouth
1950 — Balogh, Janos vs Cuadrado Pastor, Antonio — 1/2-1/2 — ICCF
1951 — Petrosian, Tigran A. vs Bannik, Anatolij — 1-0 — Tbilisi GEO
1951 — Bronstein, David I vs Aarland, Stein Arild — 1/2-1/2 — Moskou ch-URS
1951 — Novotelnov, Nikolai vs Smyslov, Vladimir — 1-0 — Moskou ch-URS

9.h3 — 20.1% (112 parties)

1952 — Kuzminykh, Evgeny vs Khasin, Abram — 1-0 — Leningrad RUS
1955 — Reshevsky, Samuel vs Sandrin, Albert — 1-0 — Long Beach, CA USA
1956 — Reshevsky, Samuel vs Evans, Larry — 1-0 — New York, NY USA
1958 — Osnos, Viatcheslav vs Rubel, Igor G — 1-0 — Leningrad RUS
1958 — Korchnoi, Viktor vs Vladimirov, Boris T — 1-0 — Tashkent UZB

9.Ne2 — 14.5% (81 parties)

1950 — Gligorić, Svetozar vs Reshevsky, Samuel — 1/2-1/2 — Radio
1951 — Petrosian, Tigran V. vs Tolush, Alexander V — 0-1 — Tbilisi GEO
1951 — Petrosian, Tigran A. vs Tolush, Alexander — 0-1 — Tbilisi GEO
1955 — Jezek, Jaroslav vs Kozma, Julius — 1/2-1/2 — Prague CZE
1958 — Spassky, Boris V. vs Krogius, Nikolai V — 1-0 — Riga ch-URS

9.dxc5 — 7.0% (39 parties)

1954 — Uhlmann, Wolfgang vs Minev, Nikolay N — 1/2-1/2 — Prague zt Prague CZE
1957 — Bykov, Vladimir vs Cherepkov, Alexander V — 1-0 — Leningrad RUS
1959 — Delmar, Gabriel vs Pithart, Frantisek — 0-1 — Trebic
1966 — Bouaziz, Nejib vs Ortega, Rogelio — 0-1 — Havana CUB
1978 — Lim, Seng Hoo vs Gutierrez Herrera, Jose Antonio — 1-0 — Kikinda Yugoslavia

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