E34i — Nimzo-Indian: Classical, Noa, 5.cxd5 Qxd5 6.Nf3 c5

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.cxd5 Qxd5 6.Nf3 c5 * ○ Trait aux Blancs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Avantages : majorité centre (2v1), case forte e5, case forte g5, paire de fous, colonne c.
Faiblesses adverses : Bc8 enfermé, roi noir au centre.
Problèmes : roi au centre, Bc1 enfermé, Bf1 enfermé, 4 pièces non développées (C1, F1, A1, H1).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● e4 — Centre d4+e4, menace e5, libère Bf1
● Bg5 — Clouer Nf6
● h3 — Empêcher ...Bg4
● Rc — Tour sur colonne c

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Avantages : majorité aile_dame (3v2), case forte d4, case forte d5, case forte f5, avant-poste d5(C), paire de fous, colonne d.
Faiblesses adverses : Bc1 enfermé, Bf1 enfermé, roi blanc au centre.
Problèmes : roi au centre, Bc8 enfermé, 4 pièces non développées (B8, C8, A8, H8).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● ...Bd7 — PRIORITÉ: libérer le Bc8 (...Bd7, b6+Bb7, ...Bg4, ...Bf5)
● ...Nbd7 — Développer Nb8
● ...Bg4 — Clouer Nf3
● ...c4 — Rupture

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

E34i — Classical Noa

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.cxd5 Qxd5 6.Nf3 c5

Eval: [+0.31]

Les coups candidats

7.Bd2 — 80.3% (175 parties)

Ambassadeurs : Capablanca, Jose (5x), Botvinnik, Mikhail (4x), Najdorf, Miguel (4x), Flohr, Salo (4x), Reshevsky, Samuel (4x), Smyslov, Vladimir (4x), ? (4x), Levenfish, Grigory (3x)

7.a3 — 11.9% (26 parties)

Ambassadeurs : Gilg, Karl (2x), Alekhine, Alexander (2x), Riumin, Nikolai (1x), Alatortsev, Vladimir N. (1x), Havasi, Kornel (1x), Capablanca, Jose (1x), Hamming, Alexander W (1x), Staehelin, Adolf (1x)

7.dxc5 — 4.1% (9 parties)

Ambassadeurs : Kan, Ilya A (1x), Yudovich, Mikhail M (1x), Petran, Pal (1x), Horvath, Gyula (1x), Peirovoulia, Mahmoud (1x), Moradi, Behrooz (1x), Obukhov, Alexander (1x), Kholmov, Ratmir D (1x)

7.e3 — 3.7% (8 parties)

Ambassadeurs : Gorkiewicz, S. (2x), Czaya, Richard (1x), Althoff, Josef (1x), Canete Espinola, Elber Victor (1x), Foltys, Jan (1x), Eliskases, Erich (1x), Spielmann, Rudolf (1x), Polak, Radim (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	7.Bd2	7.a3	7.dxc5	7.e3
<1800	2	100%	—	—	—
1800-2200	31	68%	13%	13%	6%
2200-2600	67	79%	15%	6%	—
2600+	4	100%	—	—	—

Évolution par décennie (% des parties)

Décennie	N parties	7.Bd2	7.a3	7.dxc5	7.e3
1920s	3	33%	67%	—	—
1930s	42	76%	17%	2%	5%
1940s	21	90%	5%	—	5%
1950s	11	73%	18%	—	9%
1960s	5	60%	—	—	40%
1970s	2	100%	—	—	—
1980s	13	100%	—	—	—
1990s	42	81%	10%	7%	2%
2000s	49	84%	8%	8%	—
2010s	25	76%	20%	—	4%
2020s	5	60%	20%	20%	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
7.Bd2	76%	60%	▼ -16.0%
7.a3	20%	20%	+0.0%
7.dxc5	0%	20%	▲ +20.0%
7.e3	4%	0%	▼ -4.0%

Joueurs célèbres

Champions du monde dans cette position

Botvinnik, Mikhail — 4 parties
Smyslov, Vladimir — 4 parties
Euwe, Max — 3 parties
Alekhine, Alexander — 3 parties

Parties historiques

7.Bd2 — 80.3% (175 parties)

1929 — Nimzowitsch, Aron vs Canal, Esteban — 1/2-1/2 — Carlsbad CZE
1932 — Laurine, Leho vs Czeppan — 0-1 — corr GER
1933 — Van den Bosch, Johannes vs Van Hoorn, Peter — 0-1 — The Hague/Leiden/Scheveningen
1934 — Botvinnik, Mikhail vs Lilienthal, Andor — 1/2-1/2 — Hastings ENG
1934 — Batista Grau, Ricardo vs Concepcion Villegas, Bryan Uriel — 1-0 — Mar del Plata ARG

7.a3 — 11.9% (26 parties)

1926 — Euwe, Max vs Alekhine, Alexander — 1/2-1/2 — Nederland m
1929 — Havasi, Kornel vs Capablanca, Jose — 0-1 — It, Budapest HUN
1932 — Staehelin, Adolf vs Alekhine, Alexander — 0-1 — Bern SUI
1936 — Riumin, Nikolai vs Alatortsev, Vladimir N. — 1/2-1/2 — Leningrad RUS
1936 — Hamming, Alexander W vs Gilg, Karl — 0-1 — Munich GER

7.dxc5 — 4.1% (9 parties)

1934 — Kan, Ilya A vs Yudovich, Mikhail M — 0-1 — match
1993 — Obukhov, Alexander vs Kholmov, Ratmir D — 1/2-1/2 — Azov
1996 — Petran, Pal vs Horvath, Gyula — 1/2-1/2 — Austria
1998 — Peirovoulia, Mahmoud vs Moradi, Behrooz — 1/2-1/2 — Genting Highlands MAS
2003 — Stefansson, Halldor vs Palo, Davor — 1-0 — Aarhus DEN

7.e3 — 3.7% (8 parties)

1932 — Eliskases, Erich vs Spielmann, Rudolf — 0-1 — Linz AUT
1939 — Canete Espinola, Elber Victor vs Foltys, Jan — 0-1 — Buenos Aires ol pr-A
1947 — Czaya, Richard vs Althoff, Josef — 1-0 — Weidenau
1954 — Euwe, Max vs Nievergelt, Erwin — 1/2-1/2 — Zurich SUI
1962 — Gorkiewicz, S. vs Polak, Radim — 1-0 — corr ch4-POL

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	—	● f7→e6
Passés	—	—
Majorité	● centre 2v1	● aile_dame 3v2

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● e5 (2v1), ● g5 (2v1)	● d4 (2v1), ● d5 (2v1), ● f5 (2v1)
Cases faibles	● e4	—
Centre	● e5 (2v1)	● d4 (2v1), ● d5 (2v1)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● c	● d

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bf1	● Bf1 Non développé (mob. 0)
Bb4		● Bb4 Ok (mob. 3)
Bc8		● Bc8 Non développé (mob. 1)
Paire de fous	● Oui	● Oui
Clouages	● knight c3	—
Non développées	4 (c1, f1, a1, h1)	4 (b8, c8, a8, h8)

Sécurité du roi

	♔ Blancs	♚ Noirs
Statut	● Au centre !	● Au centre !
Droits de roque	O-O / O-O-O	O-O / O-O-O

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	semi-ouvert
Ruptures	● e2-e3	● …c5-c4, ● …e6-e5

Partie
1929 Karlsbad – Round 1 – Nimzowitsch, Aron – 1/2-1/2 – Canal, Esteban – G59 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. Nf3 c5 6. cxd5 Qxd5 7. Bd2 Bxc3 8. Bxc3 Nc6 9. e3 cxd4 10. Nxd4 Nxd4
1932 Bern – Round 2 – Staehelin, Adolf – 0-1 – Alekhine, Alexander – G25 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. a3 Bxc3+ 8. bxc3 Nc6 9. e3 O-O 10. Be2 b6
1932 Linz m – Round 10 – Eliskases, Erich – 0-1 – Spielmann, Rudolf – G10 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. e3 Nc6 8. a3 Bxc3+ 9. bxc3 O-O 10. Be2 b6
1934 Copenhagen – Round 3 – Stahlberg, Gideon – 0-1 – Andersen, Erik – G25 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 O-O 9. dxc5 Qxc5 10. Rc1 Nc6
1934 Hastings3435 – Round 1 – Botvinnik, Mikhail – 1/2-1/2 – Lilienthal, Andor – G12 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. bxc3 O-O 9. e3 b6 10. c4 Qd6
1934 Mar del Plata – Round 10 – Batista Grau, Ricardo – 1-0 – Concepcion Villegas, Bryan Uriel – G49 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 Nc6 9. e3 O-O 10. Bd3 cxd4
1936 Moskou – Round 1 – Ragozin, Viacheslav – 1/2-1/2 – Botvinnik, Mikhail – G12 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 cxd4 9. Nxd4 Nc6 10. e3 Nxd4
1936 Olympiad (unofficial) – Round 19 – Hamming, Alexander W – 0-1 – Gilg, Karl – G126 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. a3 Bxc3+ 8. bxc3 Nc6 9. e3 O-O 10. Be2 b6
1936 UJCS-14.Kongress – Round 8 – Hadac, Pavel – 1/2-1/2 – Gilg, Karl – G20 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. bxc3 Nc6 9. e3 O-O 10. Be2 b6
1936 URS All-Union YM – Round 1 – Riumin, Nikolai – 1/2-1/2 – Alatortsev, Vladimir N. – G1 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. a3 Bxc3+ 8. bxc3 Qe4 9. Qd1 cxd4 10. cxd4 O-O
1937 Semmering/Baden – Round 9 – Capablanca, Jose – 1/2-1/2 – Petrov, Vladimir (ENG) – G31 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 Nc6 9. dxc5 Qxc5 10. Rc1 O-O
1937 Trebitsch mem3738 – Round 3 – Weinstock, Karl – 1/2-1/2 – Hoenlinger, Baldur – G10 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 Nbd7 9. dxc5 Qxc5 10. Rc1 O-O
1938 Karlsruhe3839 – Round 6 – Engels, Ludwig – 1/2-1/2 – Kohler, Anton – G15 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. a3 Bxc3+ 8. bxc3 Nc6 9. e3 O-O 10. Be2 b6
1938 Lodz – Round 1 – Frydman, Paulino – 1-0 – Regedzinski, Teodor – G35 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. bxc3 Nbd7 9. e3 b6 10. c4 Qd6
1939 American Continental – Round 14 – Lopez Arce Alberto – 0-1 – Poulsen, Christian – G14 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 Nc6 9. dxc5 Qxc5 10. e3 Bd7
1939 Buenos Aires ARG – Round 2 – Keres, Paul Petrovich – 1/2-1/2 – Petrov, Vladimir S. – G5 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 cxd4 9. Nxd4 e5 10. Nf3 Nc6
1939 Buenos Aires ol f-A – Round 1 – Cruz, Walter – 0-1 – Foltys, Jan – G6 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 cxd4 9. Nxd4 e5 10. Nf5 Bxf5
1939 Buenos Aires ol f-A – Round 2 – Keres, Paul Petrovich – 1/2-1/2 – Petrov, Vladimirs – G29 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 cxd4 9. Nxd4 e5 10. Nf3 Nc6
1939 Buenos Aires ol f-A – Round 7 – Cruz, Walter – 1/2-1/2 – Melngailis, Emilis – G132 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 cxd4 9. Nxd4 O-O 10. e3 e5
1939 Leningrad/Moscow – Round 8 – Flohr, Salo – 1-0 – Levenfish, Grigory – G58 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 cxd4 9. Nxd4 O-O 10. e3 e5
1939 Margate – Round 3 – Capablanca, Jose – 1/2-1/2 – Najdorf, Miguel – G15 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 Nc6 9. Rd1 O-O 10. a3 cxd4
1939 Stuttgart – Round 7 – Staldi, Cherubino – 1-0 – O'Kelly, Albéric de Galway – G38 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 cxd4 9. Nxd4 e5 10. Nb3 Nc6
1941 Mar del Plata – Round 12 – Najdorf, Miguel – 1-0 – Bolbochan, J. – G95 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 Nc6 9. Rd1 Bd7 10. dxc5 Qxc5
1942 USA Ch – Round 13 – Reshevsky, Samuel – 1-0 – Chernev, Irving – G17 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 Nc6 9. dxc5 Qxc5 10. Rc1 Bd7
1942 Verenigde Staten m ch-USA – Round 7 – Reshevsky, Samuel – 1-0 – Kashdan, Isaac – G7 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 Nc6 9. e3 O-O 10. Rd1 Qxa2
1944 URS Ch sf Moscow RUS – Round 2 – Flohr, Salo – 1/2-1/2 – Veresov, Gavriil – G1 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 cxd4 9. Nxd4 e5 10. Nf5 Bxf5
1945 Moskou ch-URS – Round 1 – Alatortsev, Vladimir N. – 1/2-1/2 – Smyslov, Vladimir – G45 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 cxd4 9. Nxd4 Nc6 10. e3 Nxd4
1946 Staunton, Groningen NED – Round 7 – Flohr, Salo – 1/2-1/2 – Najdorf, Miguel – G23 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 Nc6 9. dxc5 Qxc5 10. Rc1 Bd7
1947 Parnu – Round 1 – Bronstein, David I – 1/2-1/2 – Smyslov, Vladimir – G16 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 cxd4 9. Nxd4 Nc6 10. Nf3 O-O
1949 Oldenburg – Round 5 – Kieninger, Georg – 1/2-1/2 – Kuppe, Wilhelm – G20 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 Nc6 9. dxc5 Qxc5 10. Rc1 O-O
1949 URS Ch, semi final – Round 1 – Sokolsky, Alexey – 1/2-1/2 – Bannik, Anatolij – G12 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 cxd4 9. Nxd4 Nc6 10. Nxc6 Qxc6
1951 AUS Ch – Round 11 – Purdy, Cecil J S – 1-0 – Foster Ken – G15 1. c4 Nf6 2. d4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. a3 Bxc3+ 8. bxc3 Nbd7 9. e3 O-O 10. c4 Qd6
1951 BRA Ch – Round 10 – Gentil Junior, Luiz – 1-0 – De Souza Mendes, Joao – G22 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 O-O 9. dxc5 Qxc5 10. e4 h6
1951 YUG Ch 7th – Round 10 – Gligoric, Svetozar – 1/2-1/2 – Janosevic, Dragoljub – G80 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 Nc6 9. Rd1 O-O 10. e3 cxd4
1952 Budapest – Round 11 – O'Kelly, Albéric de Galway – 1/2-1/2 – Barcza, Gedeon – G100 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 Nc6 9. dxc5 Qxc5 10. Rc1 O-O
1952 Havana – Round 23 – Abad Gonzalez, Jose Miguel – 1/2-1/2 – Gligoric, Sofija – G160 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 O-O 9. dxc5 Qxc5 10. e4 h6
1954 New York ch-USA – Round 13 – Mengarini, Ariel – 0-1 – Bisguier, Arthur B – G53 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 cxd4 9. Nxd4 e5 10. Nf5 Bxf5
1954 Zuerich – Round 8 – Euwe, Max – 1/2-1/2 – Nievergelt, Erwin – G21 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. e3 Nc6 8. a3 Bxc3+ 9. bxc3 O-O 10. c4 Qd6
1955 Corr ch-SU – Round 1 – Dubinin, Peter – 1-0 – Evdokimov – G5 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. bxc3 Nc6 9. e3 e5 10. c4 Qd6
1958 Argentina – Round 13 – Shocron, Ruben – 1/2-1/2 – Sanguinetti, Raul – G103 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 Nc6 9. dxc5 Qxc5 10. Rc1 Bd7
1962 Skopje ch17-YUG – Round 1 – Marovic, Drazen – 1-0 – Janosevic, Dragoljub – G27 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 cxd4 9. Nxd4 e5 10. Nf3 Nc6
1967 Hoogovens – Round 6 – Larsen, Benjamin Holsko – 1-0 – Szabo, Ladislav – G39 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 c5 7. Bd2 Bxc3 8. Bxc3 cxd4 9. Nxd4 e5 10. Nf5 Bxf5

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