D27h — QGA: Classical, 6…a6 7.Bb3 cxd4

1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Bb3 cxd4 * ○ Trait aux Blancs

Ouverture — Tension centrale

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plans. exd4 (Capture en d4, Occuper le centre — 99 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plans. ...Nc6 (Développer b8 — 87 % des parties) ; ...Be7 (Fou actif (mobilité 5), Développer f8 — 12 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→e3	● b7→a6, f7→e6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	—	● d5 (3v1)
Cases faibles	—	—
Centre	● d4 (3v1), ● e5 (1v0)	● d5 (3v1), ● e4 (1v0)

Colonnes et diagonales

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

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 1)
Bb3	● Bb3 Actif (mob. 5)
Bc8		● Bc8 Non développé (mob. 1)
Bf8		● Bf8 Non développé (mob. 5)
Paire de fous	● Oui	● Oui
Non développées	3 (● b1, ● c1, ● a1)	5 (● b8, ● c8, ● f8, ● a8, ● h8)

Sécurité du roi

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

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	tension

Partie
1962 Varna ol (Men) qual-C – Round 2 – Sliwa, Bogdan – 1/2-1/2 – Filip, Marius Liviu – G8 1. d4 d5 2. c4 dxc4 3. e3 Nf6 4. Bxc4 e6 5. Nf3 c5 6. O-O a6 7. Bb3 cxd4 8. exd4 Nc6 9. Nc3 Be7 10. Re1 O-O
1962 Varna olm – Round 9 – Euwe, Max – 1/2-1/2 – Filip, Marius Liviu – G384 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Bb3 cxd4 8. exd4 Nc6 9. Nc3 Be7 10. Be3 O-O
22. ECU Club Cup 2006 – Round 1 – Moiseenko, Alexander – 1/2-1/2 – Kharlov, Andrei – G1 1. d4 d5 2. c4 dxc4 3. e3 e6 4. Bxc4 a6 5. Nf3 c5 6. O-O Nf6 7. Bb3 cxd4 8. exd4 Nc6 9. Nc3 Be7 10. Bg5 O-O
42. Olympiad 2016 – Round 7.15 – Studer, Noel – 0-1 – Balogh Urbina, Carlos Alfonso – G475 1. d4 d5 2. c4 dxc4 3. e3 Nf6 4. Bxc4 e6 5. Nf3 c5 6. O-O a6 7. Bb3 cxd4 8. exd4 Nc6 9. Nc3 Be7 10. Bg5 O-O
78. Tata Steel GpA 2016 – Round 13.6 – Mamedyarov, Shakhriyar – 1/2-1/2 – Karjakin, Sergey – G90 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 a6 6. O-O c5 7. Bb3 cxd4 8. exd4 Nc6 9. Nc3 Be7 10. Bg5 O-O
Advanced Chess rapid 2002 – Round 3 – Kramnik, Vladimir – 1-0 – Anand, Viswanathan – G3 1. Nf3 d5 2. d4 e6 3. c4 dxc4 4. e3 c5 5. Bxc4 Nf6 6. O-O a6 7. Bb3 cxd4 8. exd4 Nc6 9. Nc3 Be7 10. Bg5 O-O
Amber Rapidplay 2001 – Round 10 – Kramnik, Vladimir – 1/2-1/2 – Anand, Viswanathan – G44 1. d4 d5 2. c4 dxc4 3. Nf3 e6 4. e3 Nf6 5. Bxc4 c5 6. O-O a6 7. Bb3 cxd4 8. exd4 Nc6 9. Nc3 Be7 10. Re1 O-O
Corus A 2008 – Round 12 – Aronian, Levon – 1/2-1/2 – Ivanchuk, Vasyl – G77 1. d4 d5 2. c4 dxc4 3. Nf3 e6 4. e3 Nf6 5. Bxc4 c5 6. O-O a6 7. Bb3 cxd4 8. exd4 Be7 9. Nc3 O-O 10. Re1 Nc6
Dos Hermanas 1999 – Round ? – Kramnik, Vladimir – 1-0 – Anand, Viswanathan – G1 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Bb3 cxd4 8. exd4 Nc6 9. Nc3 Be7 10. Re1 O-O
Dos Hermanas 1999 – Round 3 – Kramnik, Vladimir – 1-0 – Anand, Viswanathan – G10 1. d4 d5 2. c4 dxc4 3. Nf3 e6 4. e3 Nf6 5. Bxc4 c5 6. O-O a6 7. Bb3 cxd4 8. exd4 Nc6 9. Nc3 Be7 10. Re1 O-O
Dos Hermanas 1999 – Round 8 – Illescas Cordoba, Miguel – 1/2-1/2 – Anand, Viswanathan – G36 1. d4 d5 2. c4 dxc4 3. Nf3 e6 4. e3 Nf6 5. Bxc4 c5 6. O-O a6 7. Bb3 cxd4 8. exd4 Nc6 9. Nc3 Be7 10. Re1 O-O
FIDE WCh KO 2000 – Round 4.2 – Gelfand, Boris – 1/2-1/2 – Shirov, Alexei – G114 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Bb3 cxd4 8. exd4 Nc6 9. Nc3 Be7 10. Re1 O-O
FIDE WCh KO 2000 – Round 4.4 – Gelfand, Boris – 1/2-1/2 – Shirov, Alexei – G119 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Bb3 cxd4 8. exd4 Nc6 9. Nc3 Be7 10. Bg5 O-O
Hoogovens 1999 – Round 10 – Kasparov, Garry – 1/2-1/2 – Anand, Viswanathan – G57 1. d4 d5 2. c4 dxc4 3. Nf3 a6 4. e3 e6 5. Bxc4 c5 6. O-O Nf6 7. Bb3 cxd4 8. exd4 Nc6 9. Nc3 Be7 10. Re1 O-O
It 2001 – Round 3 – Gelfand, Boris – 1-0 – Sadvakasov, Darmen – G6 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Bb3 cxd4 8. exd4 Nc6 9. Nc3 Be7 10. Re1 O-O
Mainz CC Champions Duel 2001 – Round 9 – Kramnik, Vladimir – 1/2-1/2 – Anand, Viswanathan – G9 1. d4 d5 2. c4 dxc4 3. Nf3 e6 4. e3 Nf6 5. Bxc4 c5 6. O-O a6 7. Bb3 cxd4 8. exd4 Nc6 9. Nc3 Be7 10. Re1 O-O
Sparkassen Cat XXI 2001 – Round 9 – Kramnik, Vladimir – 1-0 – Anand, Viswanathan – G24 1. d4 d5 2. c4 dxc4 3. Nf3 e6 4. e3 Nf6 5. Bxc4 c5 6. O-O a6 7. Bb3 cxd4 8. exd4 Nc6 9. Nc3 Be7 10. Bg5 O-O
SportAccord Rapid Men 2012 – Round 2.6 – Wang, Hao(ZJWZ) – 1/2-1/2 – Karjakin, Sergey – G13 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 a6 6. O-O c5 7. Bb3 cxd4 8. exd4 Nc6 9. Nc3 Be7 10. Re1 O-O
SuperGM 2000 – Round 8 – Kramnik, Vladimir – 1-0 – Huebner, Robert – G24 1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Bb3 cxd4 8. exd4 Nc6 9. Nc3 Be7 10. Re1 O-O
Tal Memorial Blitz 2014 – Round 5.5 – Gelfand, Boris – 1/2-1/2 – Karjakin, Sergey – G29 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 a6 6. O-O c5 7. Bb3 cxd4 8. exd4 Nc6 9. Nc3 Be7 10. Re1 O-O
WCC Match 2006 – Round 7 – Topalov, Veselin – 1/2-1/2 – Kramnik, Vladimir – G1 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 e6 5. Bd3 dxc4 6. Bxc4 c5 7. O-O a6 8. Bb3 cxd4 9. exd4 Nc6 10. Nc3 Be7
World Blitz 2015 – Round 5.12 – Wojtaszek, Radoslaw – 0-1 – Karjakin, Sergey – G279 1. d4 d5 2. c4 dxc4 3. e3 Nf6 4. Bxc4 e6 5. Nf3 a6 6. O-O c5 7. Bb3 cxd4 8. exd4 Nc6 9. Nc3 Be7 10. Re1 O-O

D27h — QGA: Classical (1962)

1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Bb3 cxd4

Les coups candidats

8.exd4 — 99.2% (710 parties)

Ambassadeurs : Ilyin, Pavel Egorovich (12x), Anand, Viswanathan (10x), Mista, Aleksander (10x), Kramnik, Vladimir (9x), Cottegnie, Francis (8x), Jones, Brian (8x), Davidov, Deian Nikolov Dr (8x), Grabner, Helmut Dr (7x)

8.Nxd4 — 0.8% (6 parties)

Ambassadeurs : Maksimenko, Andrei (2x), Kveinys, Aloyzas (1x), Baptista, Paulo (1x), Henriques, Sofia (1x), Askarov, Marat (1x), Tonoian, Armen (1x), Hujbert, Florian (1x), Bodrogi, Laszlo (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	8.exd4	8.Nxd4
<1800	18	100%	—
1800-2200	197	99%	1%
2200-2600	419	99%	1%
2600+	50	100%	—

Évolution par décennie (% des parties)

Décennie	N parties	8.exd4	8.Nxd4
1960s	3	100%	—
1990s	52	98%	2%
2000s	281	99%	1%
2010s	350	99%	1%
2020s	30	100%	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
8.exd4	99%	100%	▲ +0.6%
8.Nxd4	1%	0%	▼ -0.6%

Joueurs célèbres

Champions du monde dans cette position

Anand, Viswanathan — 10 parties
Kramnik, Vladimir — 9 parties
Kasparov, Garry — 5 parties
Karpov, Anatoly — 2 parties

Parties historiques

8.exd4 — 99.2% (710 parties)

1962 — Eken, Max vs Filip, Miroslav — 1/2-1/2 — Varna olm
1962 — Sliwa, Bogdan vs Filip, Miroslav — 1/2-1/2 — Varna BUL
1965 — OBrien, Erik Michael vs Walters, Neal — 1-0 — Santa Rosa
1990 — Panczyk, Krzysztof vs Bus, Mariusz — 1/2-1/2 — Bielsko Biala op
1993 — Hegeler, Frank vs Lazarev, Vladimir — 0-1 — Wichern op Hamburg GER

8.Nxd4 — 0.8% (6 parties)

1998 — Kveinys, Aloyzas vs Maksimenko, Andrei — 1/2-1/2 — Krynica POL
2001 — Baptista, Paulo vs Henriques, Sofia — 1/2-1/2 — Lisboa Jogos IV Cerrado CMXL
2007 — Askarov, Marat vs Tonoian, Armen — 0-1 — Sochi RUS
2008 — Hujbert, Florian vs Bodrogi, Laszlo — 0-1 — Budapest HUN
2010 — Sopur, Lech vs Maksimenko, Andrei — 1/2-1/2 — Znin POL

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