E46a — Nimzo-Indian: 4.e3 O-O
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O * ○ Trait aux Blancs
Ouverture — Centre semi-ouvert
♔ Point de vue Blancs
8
7
6
5
4
3
2
1
abcdefgh
Avantages : case forte d4, case forte b5, paire de fous.
Faiblesses adverses : Bc8 enfermé.
Problèmes : roi au centre, Bc1 enfermé, Bf1 enfermé, 5 pièces non développées (G1, C1, F1, A1, H1).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● Nf3 — Développer Ng1
● Bd2 — Développer Bc1
● Bd3 — Développer Bf1
Faiblesses adverses : Bc8 enfermé.
Problèmes : roi au centre, Bc1 enfermé, Bf1 enfermé, 5 pièces non développées (G1, C1, F1, A1, H1).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● Nf3 — Développer Ng1
● Bd2 — Développer Bc1
● Bd3 — Développer Bf1
♚ Point de vue Noirs
1
2
3
4
5
6
7
8
hgfedcba
Avantages : Bb4 actif, paire de fous.
Faiblesses adverses : Bc1 enfermé, Bf1 enfermé, roi blanc au centre.
Problèmes : Bc8 enfermé, 3 pièces non développées (B8, C8, A8).
Plans :
● ...d6 — Libérer Bc8
● ...Nc6 — Développer Nb8
● ...c5 — Rupture
● ...d5 — Rupture
● ...e5 — Rupture
Faiblesses adverses : Bc1 enfermé, Bf1 enfermé, roi blanc au centre.
Problèmes : Bc8 enfermé, 3 pièces non développées (B8, C8, A8).
Plans :
● ...d6 — Libérer Bc8
● ...Nc6 — Développer Nb8
● ...c5 — Rupture
● ...d5 — Rupture
● ...e5 — Rupture
Avantages
Faiblesses adverses
Diagonale active
Plans
Structure de pions
| ♔ Blancs | ♚ Noirs | |
| Pions doublés | — | — |
| Pions isolés | — | — |
| Arriérés | — | — |
| Chaînes | ● f2→e3, e3→d4 | ● d7→e6, f7→e6 |
| Passés | — | — |
| Majorité | — | — |
Cases
| ♔ Blancs | ♚ Noirs | |
| Cases fortes | ● d4 (2v0), ● b5 (2v0) | — |
| Cases faibles | — | — |
| Centre | ● d4 (2v0), ● e5 (1v0) | — |
Colonnes et diagonales
| ♔ Blancs | ♚ Noirs |
Pièces
| ♔ Blancs | ♚ Noirs | |
| Bc1 | ● Bc1 Non développé (mob. 1) | |
| Bf1 | ● Bf1 Non développé (mob. 2) | |
| Bb4 | ● Bb4 Actif (mob. 6) | |
| Bc8 | ● Bc8 Non développé (mob. 0) | |
| Paire de fous | ● Oui | ● Oui |
| Clouages | ● knight c3 | — |
| Non développées | 5 (g1, c1, f1, a1, h1) | 3 (b8, c8, a8) |
Sécurité du roi
| ♔ Blancs | ♚ Noirs | |
| Statut | ● Au centre ! | ● Roqué |
| Droits de roque | O-O / O-O-O | — |
Thèmes
| ♔ Blancs | ♚ Noirs | |
| Phase | Ouverture | |
| Centre | semi-ouvert | |
| Ruptures | ● c4-c5, ● d4-d5, ● e3-e4, ● f2-f3 | ● …c7-c6, ● …c7-c5, ● …d7-d6, ● …d7-d5, ● …e6-e5 |
| Partie |
|---|
| 10. Sinquefield Cup 2023 – Round 4.2 – Nepomniachtchi, Ian – 1/2-1/2 – Caruana, Fabiano – G14 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. a3 Be7 7. Nf3 Nbd7 8. Qc2 dxc4 9. Bxc4 c5 10. O-O cxd4 |
| 11. Norway Chess 2023 – Round 8.5 – Caruana, Fabiano – 1/2-1/2 – So, Wesley – G40 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 b6 7. cxd5 exd5 8. Bd3 Bd6 9. O-O Re8 10. Re1 Bb7 |
| 2024 Superbet Chess Classic - Round 1 - Gukesh D - 1-0 - Deac Bogdan-Daniel - G4 1. d4 1... Nf6 2. c4 2... e6 3. Nc3 3... Bb4 4. e3 4... O-O 5. Bd2 5... c5 6. d5 6... d6 7. Bd3 7... exd5 8. cxd5 8... Nbd7 9. Nge2 9... Ne5 10. Bc2 10... Rb8 |
| 2024 Superbet Chess Rapid – Round 1 – Keymer Vincent – 1/2-1/2 – Wei Yi – G4 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 Qe7 9. Qc2 dxc4 10. Bxc4 e5 |
| 2024 Superbet Chess Rapid – Round 2 – Giri Anish – 1/2-1/2 – Erigaisi Arjun – G9 1. c4 e6 2. Nc3 Nf6 3. d4 Bb4 4. e3 O-O 5. Bd2 b6 6. Bd3 d5 7. cxd5 exd5 8. Rc1 c5 9. Nge2 Ba6 10. Bxa6 Nxa6 |
| 43. Olympiad 2018 – Round 5.21 – Aleksandrov, Aleksej – 1-0 – Shengelia, David – G320 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 Re8 6. Bd3 b6 7. Nf3 Bb7 8. O-O c5 9. a3 Ba5 10. b4 cxb4 |
| 43. Olympiad 2018 – Round 7.6 – Aleksandrov, Aleksej – 1/2-1/2 – Melkumyan, Hrant – G481 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 Nbd7 7. Rc1 Be7 8. Qc2 a6 9. c5 c6 10. Bd3 Qc7 |
| 63. ch-USA 2019 – Round 3.6 – Gareyev, Timur – 1/2-1/2 – Lenderman, Aleksandr – G18 1. d4 e6 2. c4 Nf6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 c5 6. Bd3 cxd4 7. exd4 d5 8. cxd5 exd5 9. Nge2 Nc6 10. O-O Bd6 |
| American Cup Blitz 2022 – Round 4.3 – Akobian, Varuzhan – 1-0 – Robson, Ray – G21 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 b6 6. Nf3 Bb7 7. Bd3 d5 8. cxd5 exd5 9. Qc2 Re8 10. a3 Bd6 |
| American Cup Blitz 2022 – Round 7.5 – Akobian, Varuzhan – 0-1 – Martinez Alcantara, Jose Eduardo – G40 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 b6 6. Bd3 Bb7 7. Nf3 d6 8. Qc2 c5 9. a3 Bxc3 10. Bxc3 Nbd7 |
| American Cup Champ 2023 – Round 4.4 – Nakamura, Hikaru – 0-1 – So, Wesley – G30 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 b6 7. cxd5 exd5 8. Bd3 Bd6 9. O-O Re8 10. a3 c5 |
| American Cup Elim 2022 – Round 2.2 – So, Wesley – 0-1 – Aronian, Levon – G10 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 c5 6. a3 Bxc3 7. Bxc3 Ne4 8. Ne2 b6 9. d5 d6 10. Rc1 e5 |
| FIDE Grand Prix 3 Pool A 2022 – Round 2.2 – Nakamura, Hikaru – 1/2-1/2 – Esipenko, Andrey – G4 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 b6 7. cxd5 exd5 8. Bd3 Re8 9. O-O Bb7 10. Ne5 Bf8 |
| FIDE Grand Swiss 2025 – Round 8 – Kuzubov Yuriy – 1/2-1/2 – Xiong Jeffery – G443 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 b6 7. cxd5 exd5 8. Rc1 Be7 9. Bd3 c5 10. Ne5 Bb7 |
| FIDE World Cup 2019 – Round 1.1 – Fedoseev, Vladimir – 1-0 – Ganguly, Surya Shekhar – G18 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 b6 6. Nf3 d5 7. cxd5 exd5 8. Rc1 Be7 9. Bd3 Bb7 10. O-O c5 |
| FIDE World Cup 2019 – Round 1.2 – Adhiban, B. – 1/2-1/2 – Iturrizaga Bonelli, Eduardo – G81 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d6 6. Bd3 e5 7. Nge2 Re8 8. O-O Nbd7 9. a3 Bxc3 10. Nxc3 Nf8 |
| FIDE World Cup 2019 – Round 2.1 – Adhiban, B. – 1/2-1/2 – Yu, Yangyi – G203 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 c5 7. a3 Bxc3 8. Bxc3 Ne4 9. Rc1 Nxc3 10. Rxc3 cxd4 |
| FIDE World Cup 2019 – Round 2.3 – Grischuk, Alexander – 1/2-1/2 – Bok, Benjamin – G262 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 b6 7. cxd5 exd5 8. Bd3 Bd6 9. O-O Bb7 10. Qb1 Nbd7 |
| FTX Crypto Cup 2022 – Round 3.2 – Firouzja, Alireza – 1/2-1/2 – Giri, Anish – G37 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. a3 Be7 7. Nf3 Nbd7 8. cxd5 exd5 9. Bd3 c6 10. Qc2 Bd6 |
| FTX Crypto Cup 2022 – Round 3.4 – Firouzja, Alireza – 1/2-1/2 – Giri, Anish – G45 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 c5 6. a3 Bxc3 7. Bxc3 Ne4 8. Ne2 b6 9. d5 Ba6 10. Qd3 exd5 |
| GCT Blitz Paris 2021 – Round 16.3 – Caruana, Fabiano – 1/2-1/2 – Aronian, Levon – G76 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 c5 6. a3 Bxc3 7. Bxc3 Ne4 8. Rc1 b6 9. Nf3 Bb7 10. Be2 Nxc3 |
| Global Chess League 2023 – Round 2.6 – Nihal Sarin – 1-0 – Bjerre, Jonas Buhl – G24 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 b6 7. cxd5 exd5 8. Rc1 Bb7 9. Bd3 Re8 10. Nb5 Bxd2+ |
| Global Chess League 2023 – Round 4.1 – Nepomniachtchi, Ian – 1/2-1/2 – Aronian, Levon – G40 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. a3 Be7 7. Nf3 Nbd7 8. Qc2 Re8 9. Be2 dxc4 10. Bxc4 c5 |
| Norway Chess 2024 - Round 4 - Nakamura, Hikaru - 1-0 - Praggnanandhaa R - G18 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 c5 6. a3 Bxc3 7. Bxc3 Ne4 8. Ne2 b6 9. d5 Ba6 10. b3 b5 |
| Norway Chess 2024 - Round 9 - Nakamura, Hikaru - 1/2-1/2 - Ding, Liren - G41 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 b6 7. cxd5 exd5 8. Bd3 Bd6 9. Nb5 Be7 10. O-O c5 |
| Saint Louis Blitz 2021 – Round 15.5 – Shankland, Sam – 0-1 – Caruana, Fabiano – G71 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 b6 7. cxd5 exd5 8. Bd3 Re8 9. O-O Bf8 10. Ne5 c5 |
| Saint Louis Rapid 2022 – Round 6.5 – Caruana, Fabiano – 1/2-1/2 – Aronian, Levon – G30 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 c5 6. a3 Bxc3 7. Bxc3 Ne4 8. Ne2 b6 9. d5 d6 10. dxe6 fxe6 |
| Saint Louis Rapid 2024 - Round 2 - Aronian Levon - 1-0 - Nepomniachtchi Ian - G9 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 c5 7. a3 Bxc3 8. Bxc3 Ne4 9. Rc1 Nxc3 10. Rxc3 cxd4 |
| SuperUnited Blitz 2022 – Round 11.3 – Firouzja, Alireza – 1-0 – So, Wesley – G53 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. a3 Be7 7. Nf3 b6 8. cxd5 exd5 9. Bd3 c5 10. Rc1 Bb7 |
| Tata Steel Chess 2025 – Round 5 – Gukesh D – 1-0 – Keymer Vincent – G34 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 Nbd7 7. Qc2 c6 8. Be2 b6 9. O-O a5 10. a3 Bxc3 |
| WCh 2023 – Round 14.1 – Ding, Liren – 1/2-1/2 – Nepomniachtchi, Ian – G14 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. a3 Be7 7. Nf3 c5 8. dxc5 Bxc5 9. Qc2 dxc4 10. Bxc4 Nbd7 |
| World Blitz 2019 – Round 2.3 – Bluebaum, Matthias – 0-1 – Karjakin, Sergey – G103 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 b6 6. Bd3 Bb7 7. Nf3 d5 8. cxd5 exd5 9. O-O Re8 10. Rc1 Bf8 |
| World Blitz 2019 – Round 21.72 – Vishnu Prasanna, V – 1-0 – Bosiocic, Marin – G1447 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 b6 7. cxd5 exd5 8. Bd3 Bb7 9. O-O a6 10. Rc1 Be7 |
| World Blitz 2019 – Round 8.31 – Yuffa, Daniil – 1/2-1/2 – Aronian, Levon – G543 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 c5 6. a3 Bxc3 7. Bxc3 Ne4 8. Ne2 b6 9. d5 Ba6 10. b3 b5 |
| World Blitz 2021 – Round 13.50 – Peng, Li Min – 0-1 – Sargsyan, Shant – G789 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 c5 6. a3 Bxc3 7. Bxc3 Ne4 8. Rc1 d6 9. Nf3 Nc6 10. Bd3 Nxc3 |
| World Blitz 2021 – Round 16.44 – Bluebaum, Matthias – 1-0 – Gajewski, Grzegorz – G954 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 Nbd7 7. a3 Be7 8. cxd5 exd5 9. Bd3 c6 10. O-O Bd6 |
| World Blitz 2021 – Round 16.7 – Maghsoodloo, Parham – 1-0 – Firouzja, Alireza – G974 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 b6 7. cxd5 exd5 8. Rc1 Bb7 9. Bd3 Re8 10. O-O Bf8 |
| World Blitz 2021 – Round 19.15 – Maghsoodloo, Parham – 0-1 – Gukesh D – G1093 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 b6 7. cxd5 exd5 8. Rc1 c5 9. a3 Ba5 10. b4 cxb4 |
| World Blitz 2021 – Round 2.46 – Maghsoodloo, Parham – 1/2-1/2 – Donchenko, Alexander – G103 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 b6 6. Nf3 d5 7. cxd5 exd5 8. Rc1 Bb7 9. Bd3 Re8 10. O-O Bf8 |
| World Blitz 2021 – Round 4.25 – Maghsoodloo, Parham – 1-0 – Volokitin, Andrei – G213 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 b6 6. Nf3 Bb7 7. Rc1 c5 8. dxc5 Bxc5 9. a3 d5 10. Qc2 Nc6 |
| World Blitz 2021 – Round 9.57 – Bluebaum, Matthias – 1/2-1/2 – Sargsyan, Shant – G551 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 b6 7. cxd5 exd5 8. Bd3 c5 9. h3 Nc6 10. a3 Bxc3 |
| World Blitz 2022 – Round 1.10 – Vachier-Lagrave, Maxime – 1-0 – Hambleton, Aman – G2 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 Re8 7. Rc1 Nbd7 8. Qb3 Bxc3 9. Bxc3 c6 10. Bd3 Ne4 |
| World Blitz 2022 – Round 20.28 – Bluebaum, Matthias – 0-1 – Yakubboev, Nodirbek – G1059 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 b6 7. cxd5 exd5 8. Rc1 a6 9. Bd3 Bd6 10. O-O Re8 |
| World Blitz 2023 – Round 1.60 – Matyakubov, Miraziz – 0-1 – Pranav, V – G59 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 b6 6. Nf3 Bb7 7. Bd3 d6 8. Qc2 Nbd7 9. O-O e5 10. Ng5 g6 |
| World Blitz 2023 – Round 12.97 – Matyakubov, Miraziz – 0-1 – Zilka, Stepan – G728 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 c5 7. a3 Bxc3 8. Bxc3 Ne4 9. Rc1 Nxc3 10. Rxc3 cxd4 |
| World Blitz 2023 – Round 20.59 – Grebnev, Aleksey – 1-0 – Vrolijk, Liam – G1163 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 b6 7. cxd5 exd5 8. Bd3 Re8 9. O-O Bd6 10. Nb5 Bf8 |
| World Blitz 2023 – Round 7.35 – Grebnev, Aleksey – 1-0 – Pranav, V – G413 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 b6 6. Nf3 Bb7 7. Bd3 d6 8. O-O Nbd7 9. a3 Bxc3 10. Bxc3 Ne4 |
| World Blitz 2023 – Round 8.35 – Seemann, Jakub – 0-1 – Ponkratov, Pavel – G469 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 Re8 6. Nf3 d5 7. cxd5 exd5 8. Bd3 c6 9. O-O Bg4 10. h3 Bh5 |
| World Rapid 2019 – Round 1.6 – Gasanov, Eldar – 0-1 – Aronian, Levon – G47 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 Nbd7 7. Rc1 Re8 8. Qc2 a6 9. Bd3 dxc4 10. Bxc4 b5 |
| World Rapid 2019 – Round 10.17 – Adhiban, B. – 1/2-1/2 – Gelfand, Boris – G627 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 c5 6. a3 Bxc3 7. Bxc3 Ne4 8. Rc1 d6 9. Bd3 Nxc3 10. Rxc3 Nc6 |
| World Rapid 2019 – Round 11.13 – Rakhmanov, Aleksandr – 1/2-1/2 – Sargissian, Gabriel – G690 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 b6 7. cxd5 exd5 8. Rc1 Bb7 9. Bd3 Be7 10. O-O c5 |
| World Rapid 2019 – Round 2.72 – Adhiban, B. – 1-0 – Potapov, Pavel – G141 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 b6 7. cxd5 exd5 8. Rc1 Bb7 9. Bd3 c5 10. Ne5 Nbd7 |
| World Rapid 2019 – Round 4.38 – Adhiban, B. – 1-0 – Samsonkin, Artiom – G251 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 a5 6. a3 Bxc3 7. Bxc3 Ne4 8. Rc1 Qe7 9. Bd3 Nxc3 10. Rxc3 d6 |
| World Rapid 2019 – Round 4.76 – Bluebaum, Matthias – 1-0 – Batchuluun, Tsegmed – G286 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 b6 7. cxd5 exd5 8. Rc1 Bb7 9. Bd3 Nbd7 10. O-O Re8 |
| World Rapid 2021 – Round 3.68 – Peng, Li Min – 1-0 – Vokhidov, Shamsiddin – G189 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 b6 6. Nf3 d5 7. cxd5 exd5 8. Bd3 Ba6 9. Bxa6 Nxa6 10. O-O Qc8 |
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