A40p — Queen’s Pawn: Keres Defence

1.d4 e6 2.c4 Bb4+ * ○ Trait aux Blancs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plan principal. Attaque sur le roi adverse resté au centre.

Atouts. Les Blancs s'appuient sur la paire de fous.

Côté adverse. Le fou enfermé en c8 et le roi resté au centre.

En contrepartie. Le roi n'est pas encore à l'abri et plusieurs pièces dorment encore (les cavaliers b1 et g1, les fous c1 et f1 et les tours a1 et h1).

Plans. Nc3 (Développer Nb1).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plan principal. Attaque sur le roi adverse resté au centre.

Atouts. Les Noirs s'appuient sur un fou actif en b4 et la paire de fous.

Côté adverse. Les fous enfermés en c1 et f1 et le roi resté au centre.

En contrepartie. Le roi n'est pas encore à l'abri et plusieurs pièces dorment encore (les cavaliers b8 et g8, le fou c8 et les tours a8 et h8).

Plans. ...d6 (Libérer Bc8) ; ...Nc6 (Développer Nb8) ; ...Nf6 (Développer Ng8) ; ...c5 (Rupture) ; ...d5 (Rupture).

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	—	● d7→e6, f7→e6
Passés	—	—
Majorité	—	—

Cases

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

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bf1	● Bf1 Non développé (mob. 0)
Bb4		● Bb4 Actif (mob. 9)
Bc8		● Bc8 Non développé (mob. 0)
Paire de fous	● Oui	● Oui
Non développées	6 (● b1, ● g1, ● c1, ● f1, ● a1, ● h1)	5 (● b8, ● g8, ● 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	● c4-c5, ● d4-d5, ● e2-e3, ● f2-f3	● …c7-c6, ● …c7-c5, ● …d7-d6, ● …d7-d5, ● …e6-e5, ● …f7-f6, ● …f7-f5

Partie
1912 DSB-18.Kongress – Round 17 – Schlechter, Carl – 1/2-1/2 – Cohn, Erich – G134 1. d4 e6 2. c4 Bb4+ 3. Nd2 f5 4. Nf3 Nf6 5. e3 b6 6. Bd3 Bb7 7. O-O O-O 8. Qc2 Bxd2 9. Nxd2 Na6 10. a3 c5
1929 Karlsbad – Round 16 – Spielmann, Rudolf – 1/2-1/2 – Becker, Albert – G192 1. d4 e6 2. c4 Bb4+ 3. Nd2 d5 4. e3 Nf6 5. Nf3 O-O 6. a3 Be7 7. Bd3 Nbd7 8. O-O c5 9. cxd5 exd5 10. b3 cxd4
1936 Bad Nauheim – Round ? – Dr, A.Alekhine – 1/2-1/2 – Keres, Paul Petrovich – G42 1. d4 e6 2. c4 Bb4+ 3. Nc3 c5 4. dxc5 Bxc3+ 5. bxc3 Qa5 6. Nf3 Nf6 7. e3 O-O 8. Nd4 Ne4 9. Bb2 Nxc5 10. Nb3 Qc7
1936 Bad Nauheim – Round 5 – Alekhine, Alexander – 1/2-1/2 – Keres, Paul Petrovich – G21 1. d4 e6 2. c4 Bb4+ 3. Nc3 c5 4. dxc5 Bxc3+ 5. bxc3 Qa5 6. Nf3 Nf6 7. e3 O-O 8. Nd4 Ne4 9. Bb2 Nxc5 10. Nb3 Qc7
1936 Zandvoort – Round 1 – Landau, Salo – 1-0 – Keres, P. – G5 1. d4 e6 2. c4 Bb4+ 3. Nc3 c5 4. e3 d5 5. cxd5 exd5 6. a3 Bxc3+ 7. bxc3 Nf6 8. dxc5 O-O 9. Bd3 Nbd7 10. Ne2 Nxc5
1937 Kemeri – Round 1 – Landau, Salo – 0-1 – Alekhine, Alexander – G38 1. d4 e6 2. c4 Bb4+ 3. Nc3 f5 4. Qb3 Qe7 5. a3 Bxc3+ 6. Qxc3 Nf6 7. Nf3 Nc6 8. b4 b6 9. Bb2 Bb7 10. g3 Ne4
1939 Leningrad/Moscow – Round 11 – Reshevsky, Samuel – 1/2-1/2 – Alatortsev, Vladimir N. – G83 1. d4 e6 2. c4 Bb4+ 3. Nc3 f5 4. Qb3 Qe7 5. a3 Bxc3+ 6. Qxc3 a5 7. b3 b6 8. Nf3 Nf6 9. g3 Bb7 10. Bg2 O-O
1940 Rakovnik – Round 9 – Opocensky, Karel – 1/2-1/2 – Katetov, Miroslav – G48 1. d4 e6 2. c4 Bb4+ 3. Nd2 d5 4. a3 Be7 5. Ngf3 f5 6. e3 Nf6 7. Qc2 Ne4 8. Be2 Nd7 9. O-O c6 10. Ne1 Bd6
1947 Vienna SCHLECHTER-mem – Round 12 – Szabo, Laszlo – 1-0 – Grob, Henry – G26 1. d4 e6 2. c4 Bb4+ 3. Nc3 f5 4. e4 fxe4 5. Qg4 Nf6 6. Qxg7 Rg8 7. Qh6 Rg6 8. Qh4 Nc6 9. Ne2 d5 10. Bg5 dxc4
1947 Vienna SCHLECHTER-mem – Round 3 – Kottnauer, Cenek – 1-0 – Grob, Henry – G6 1. d4 e6 2. c4 Bb4+ 3. Nc3 f5 4. Qc2 Nf6 5. g3 Nc6 6. Nf3 Qe7 7. Bg2 O-O 8. O-O Bxc3 9. Qxc3 d6 10. b3 e5
1951 Moskou ch-URS – Round 1 – Kotov Lundqvist, Alex – 1-0 – Keres, Paul – G29 1. d4 e6 2. c4 Bb4+ 3. Nc3 c5 4. e3 b6 5. Ne2 Nf6 6. a3 Ba5 7. Rb1 Na6 8. Ng3 Bb7 9. f3 h5 10. e4 Bxc3+
1955 Moskou ch-URS – Round 1 – Borisenko, Georgy K – 1/2-1/2 – Petrosian, Tigran A. – G41 1. d4 e6 2. c4 Bb4+ 3. Nc3 f5 4. Nf3 Nf6 5. Qb3 a5 6. Bd2 b6 7. g3 Bb7 8. Bg2 O-O 9. O-O Bxc3 10. Bxc3 Be4
1956 Dresden – Round 14 – Uhlmann, Wolfgang – 1-0 – Pachman, Ludek – G88 1. d4 e6 2. c4 Bb4+ 3. Nd2 f5 4. a3 Bxd2+ 5. Bxd2 Nf6 6. e3 d6 7. Bd3 O-O 8. Qc2 Qe7 9. Ne2 b6 10. f3 c5
1956 Leningrad ch-URS – Round 1 – Borisenko, Georgy K – 1-0 – Ragozin, Viacheslav – G33 1. d4 e6 2. c4 Bb4+ 3. Nc3 f5 4. Qc2 Nf6 5. e3 b6 6. Bd3 Bb7 7. f3 O-O 8. Bd2 a5 9. Nge2 Nc6 10. O-O-O Bxc3
1957 HUN Ch 12th – Round ? – Portisch, Lajos – 1/2-1/2 – Lengyel, Levente – G9 1. d4 e6 2. c4 Bb4+ 3. Nc3 f5 4. Bd2 Nf6 5. g3 d6 6. Bg2 c5 7. Nf3 O-O 8. O-O Qe7 9. dxc5 Bxc5 10. Ne1 Nc6
1958 HUN Ch 14th – Round 15 – Sallay, Roland – 0-1 – Barcza, Gedeon – G37 1. d4 e6 2. c4 Bb4+ 3. Nc3 f5 4. Qc2 Nf6 5. Bd2 O-O 6. e3 c5 7. d5 exd5 8. cxd5 d6 9. Bd3 Qe7 10. Nf3 Bxc3
1958 HUN Ch Budapest HUN – Round 17 – Sallay, Roland – 1/2-1/2 – Filep, Tibor – G88 1. d4 e6 2. c4 Bb4+ 3. Nc3 Bxc3+ 4. bxc3 f5 5. e4 fxe4 6. Qg4 Qe7 7. Qxe4 Nf6 8. Qh4 e5 9. Be2 O-O 10. Nf3 exd4
1960 WchT U26 07th – Round 12 – Kolarov, Atanas Stefanov – 1-0 – Keto, Hannu – G26 1. c4 e6 2. d4 Bb4+ 3. Nc3 Bxc3+ 4. bxc3 f5 5. e3 Nf6 6. Bd3 d6 7. Qc2 Nc6 8. Ne2 Qe7 9. O-O O-O 10. Ng3 Qf7
1961 Maroczy Memorial Budapest HUN – Round 1 – Filip, Marius Liviu – 1/2-1/2 – Barcza, Gedeon – G14 1. d4 e6 2. c4 Bb4+ 3. Nd2 c5 4. a3 Bxd2+ 5. Qxd2 cxd4 6. Nf3 d5 7. Nxd4 Nf6 8. e3 O-O 9. cxd5 Qxd5 10. Nb5 a6
1961 Moskou – Round 1 – Taimanov, Mark E – 1-0 – Bronstein, David I – G25 1. d4 e6 2. c4 Bb4+ 3. Nd2 Nf6 4. a3 Bxd2+ 5. Bxd2 d6 6. e3 a5 7. Bd3 c5 8. Ne2 Nc6 9. O-O O-O 10. Qc2 Bd7
1961 Rostov – Round 4 – Taimanov, Mark E – 1-0 – Nezhmetdinov, Rashid – G10 1. d4 e6 2. c4 Bb4+ 3. Nd2 d5 4. a3 Be7 5. Ngf3 Nf6 6. e3 O-O 7. Bd3 Nbd7 8. b4 b6 9. Bb2 c5 10. dxc5 bxc5
1963 Budapest ch-HUN – Round 1 – Lengyel, Laszlo – 1-0 – Szilagyi, Peter – G48 1. d4 e6 2. c4 Bb4+ 3. Nc3 f5 4. e3 Bxc3+ 5. bxc3 Nf6 6. Bd3 d6 7. Ba3 Qe7 8. c5 O-O 9. cxd6 cxd6 10. Ne2 b6
1963 Kiev Avantgard Ch – Round ? – Zamikhovsky, Abram – 1-0 – Gindin E – G13 1. d4 e6 2. c4 Bb4+ 3. Nd2 d5 4. e3 Nf6 5. a3 Be7 6. Ngf3 b6 7. Bd3 c5 8. O-O cxd4 9. Nxd4 O-O 10. b3 Bb7
1965 Hungary – Round 1 – Forintos, Gyozo V – 1/2-1/2 – Barczay, Laszlo – G27 1. d4 e6 2. c4 Bb4+ 3. Nc3 f5 4. Qc2 Nf6 5. a3 Bxc3+ 6. Qxc3 O-O 7. g3 d6 8. Bg2 Nbd7 9. Nf3 Qe7 10. O-O e5
1965 Mar del Plata – Round 10 – Averbakh, Yuri L – 1-0 – Sanguinetti, Ricardo – G75 1. c4 e6 2. d4 Bb4+ 3. Nd2 f5 4. Nf3 Nf6 5. g3 O-O 6. Bg2 d6 7. O-O Bxd2 8. Bxd2 Nbd7 9. Bb4 Qe7 10. Ba3 Rb8
1965 Tallinn ch-URS – Round 1 – Furman, Slavomir – 1/2-1/2 – Bronstein, David I – G43 1. d4 e6 2. c4 Bb4+ 3. Nd2 c5 4. dxc5 Nf6 5. g3 O-O 6. Bg2 Bxc5 7. Ngf3 Nc6 8. O-O Be7 9. e4 d6 10. b3 Qc7
1966 Sochi – Round 4 – Korchnoi, Viktor – 1-0 – Barcza, Gedeon – G17 1. c4 e6 2. d4 Bb4+ 3. Nc3 c5 4. d5 d6 5. e4 Nf6 6. Bd3 Nbd7 7. Ne2 e5 8. O-O Bxc3 9. Nxc3 O-O 10. g3 Ne8
1967 Corr ch HUN – Round ? – Szabo, Laszlo – 1-0 – Roth Painescu, Eric Alexander – G3 1. d4 e6 2. c4 Bb4+ 3. Nc3 Bxc3+ 4. bxc3 f5 5. g3 Nf6 6. Bg2 O-O 7. Nh3 d6 8. Qb3 c6 9. O-O e5 10. c5+ d5
1967 HUN Ch – Round 4 – Kovacs, Laszlo M – 0-1 – Barcza, Gedeon – G8 1. d4 e6 2. c4 Bb4+ 3. Nc3 f5 4. Qc2 Nf6 5. a3 Bxc3+ 6. Qxc3 O-O 7. g3 d6 8. b3 c5 9. dxc5 Ne4 10. Qc2 dxc5
1967 Moscow – Round 1 – Najdorf, Miguel – 1/2-1/2 – Filip, Marius Liviu – G30 1. d4 e6 2. c4 Bb4+ 3. Nd2 Nf6 4. e3 O-O 5. a3 Bxd2+ 6. Qxd2 b6 7. Bd3 Bb7 8. f3 c5 9. Ne2 cxd4 10. exd4 d5
1967 October Revolution 50 – Round 1 – Vladimirov, Boris T – 1/2-1/2 – Barcza, Gedeon – G2 1. d4 e6 2. c4 Bb4+ 3. Nc3 c5 4. a3 Bxc3+ 5. bxc3 d5 6. cxd5 Qxd5 7. f3 cxd4 8. cxd4 e5 9. e4 Qxd4 10. Qxd4 exd4
1967 Zinnowitz – Round 1 – Kozma, Julius – 1-0 – Sliwa, Bogdan – G7 1. d4 e6 2. c4 Bb4+ 3. Nd2 d5 4. Nf3 dxc4 5. a3 Bxd2+ 6. Bxd2 c6 7. e4 b5 8. b3 cxb3 9. Qxb3 Nf6 10. Bd3 Bb7
1968 Hastings6869 – Round 3 – Gligorić, Svetozar – 1-0 – Fuller, Maxwell Leonard – G14 1. d4 e6 2. c4 Bb4+ 3. Nd2 f5 4. Nf3 Nf6 5. g3 Nc6 6. Bg2 Qe7 7. O-O Bxd2 8. Qxd2 O-O 9. d5 Ne4 10. Qf4 e5
1968 HUN-URS – Round ? – Chernikov, Oleg L – 1/2-1/2 – Barcza, Gedeon – G2 1. d4 e6 2. c4 Bb4+ 3. Nd2 c5 4. a3 Bxd2+ 5. Qxd2 cxd4 6. Nf3 Nf6 7. b4 d5 8. cxd5 Qxd5 9. Qxd4 Nc6 10. Qxd5 Nxd5
1968 HUN-URS – Round ? – Khodos, German – 1/2-1/2 – Barcza, Gedeon – G3 1. d4 e6 2. c4 Bb4+ 3. Nd2 c5 4. a3 Bxd2+ 5. Qxd2 cxd4 6. Nf3 Nf6 7. Qxd4 Nc6 8. Qd1 d5 9. cxd5 Qxd5 10. Bg5 Bd7
1968 URS Team Ch – Round 1 – Borisenko, Georgy K – 1/2-1/2 – Taimanov, Mark E – G41 1. d4 e6 2. c4 Bb4+ 3. Nc3 c5 4. d5 f5 5. Nf3 Bxc3+ 6. bxc3 Qf6 7. dxe6 dxe6 8. Qd3 Nc6 9. Bg5 Qg6 10. Qe3 Nf6
1969 Moscow RUS – Round 1 – Dmitrievsky, Alexander – 0-1 – Murey, Jacob – G2 1. d4 e6 2. c4 Bb4+ 3. Nd2 f5 4. g3 Nf6 5. a3 Be7 6. Bg2 Nc6 7. Ngf3 a5 8. Qc2 O-O 9. O-O a4 10. Nb1 d5
4. Final Masters 2011 – Round 1 – Nakamura, Hikaru – 1/2-1/2 – Ivanchuk, Vasyl – G2 1. d4 e6 2. c4 Bb4+ 3. Nd2 Nf6 4. a3 Be7 5. e4 d5 6. e5 Nfd7 7. Ngf3 a5 8. cxd5 exd5 9. Nb1 c5 10. dxc5 Nxc5
41. Olympiad Open 2014 – Round 11.30 – Ragger, Markus – 1-0 – Matamoros Franco, Carlos S. – G789 1. d4 e6 2. c4 Bb4+ 3. Nd2 c5 4. a3 Bxd2+ 5. Qxd2 cxd4 6. Nf3 Nf6 7. Qxd4 Nc6 8. Qh4 d6 9. Bg5 Qa5+ 10. Bd2 Qb6
41. Olympiad Open 2014 – Round 8.22 – Ragger, Markus – 0-1 – Granda Zuniga, Julio E – G566 1. d4 e6 2. c4 Bb4+ 3. Nd2 d5 4. Qa4+ Nc6 5. Nf3 dxc4 6. a3 Bxd2+ 7. Bxd2 Qd5 8. Qc2 Nxd4 9. Nxd4 Qxd4 10. e3 Qd5
8. Tal Memorial 2013 – Round 3.2 – Gelfand, Boris – 1/2-1/2 – Andreikin, Dmitry – G10 1. d4 e6 2. c4 Bb4+ 3. Nd2 c5 4. a3 Bxd2+ 5. Qxd2 cxd4 6. Nf3 Nf6 7. Nxd4 O-O 8. e3 d5 9. cxd5 Qxd5 10. Nb5 Qc6
FIDE GP Paris 2013 – Round 7.3 – Gelfand, Boris – 1-0 – Grischuk, Alexander – G39 1. d4 e6 2. c4 Bb4+ 3. Nd2 b6 4. a3 Bxd2+ 5. Qxd2 Bb7 6. Nf3 f5 7. g3 Nf6 8. Bg2 O-O 9. O-O Qe8 10. b4 d6
FIDE Grand Swiss 2025 – Round 5 – Bluebaum Matthias – 1-0 – Praggnanandhaa R – G234 1. d4 e6 2. c4 Bb4+ 3. Nc3 Bxc3+ 4. bxc3 f5 5. e4 fxe4 6. Qg4 Qe7 7. Qxe4 Nf6 8. Qc2 b6 9. Nf3 Bb7 10. Be2 d6
FIDE World Cup 2025 – Round R1 Classical 2 – Lashkin Jegor – 1/2-1/2 – Tin Jingyao – G132 1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 4. d4 cxd4 5. Nxd4 Nf6 6. O-O a6 7. Bd3 Nc5 8. Re1 e6 9. c4 Be7 10. Nc3 O-O
Global Chess League 2023 – Round 6.4 – Kosteniuk, Alexandra – 1/2-1/2 – Hou, Yifan(HLJ) – G75 1. d4 e6 2. c4 Bb4+ 3. Nc3 b6 4. Qb3 a5 5. e4 Bb7 6. Qc2 Qh4 7. Bd3 f5 8. Nf3 Bxc3+ 9. bxc3 Qg4 10. Nd2 Qxg2
Manila Interzonal 1990 – Round 3 – Agdestein, Simen – 1-0 – Salov, Valery – G45 1. d4 e6 2. c4 Bb4+ 3. Nd2 d5 4. Qa4+ Nc6 5. e3 Nf6 6. a3 Bxd2+ 7. Bxd2 Ne4 8. Nf3 Nxd2 9. Nxd2 O-O 10. Nf3 Ne7
Qatar Masters Open 2015 – Round 2.36 – Lenderman, Aleksandr – 1-0 – Haria, Ravi – G76 1. d4 e6 2. c4 Bb4+ 3. Nd2 b6 4. Nf3 Bb7 5. a3 Bxd2+ 6. Bxd2 f5 7. g3 Nf6 8. Bg2 O-O 9. O-O Be4 10. Bc3 Nc6
Roquebrune rapid 1992 – Round 19 – Seirawan, Yasser – 1/2-1/2 – Speelman, Jon S – G61 1. d4 e6 2. c4 Bb4+ 3. Nd2 d5 4. a3 Be7 5. Ngf3 Nf6 6. e3 O-O 7. b4 a5 8. b5 c5 9. bxc6 bxc6 10. c5 Nfd7
SportAccord Rapid Men 2012 – Round 1.8 – Ding, Liren – 1-0 – Ivanchuk, Vasyl – G7 1. d4 e6 2. c4 Bb4+ 3. Nd2 b6 4. a3 Bxd2+ 5. Qxd2 Bb7 6. Nf3 f5 7. e3 Nf6 8. b4 a5 9. b5 d6 10. Be2 Nbd7
Tal Memorial Blitz 2008 – Round 6 – Mamedyarov, Shakhriyar – 1/2-1/2 – Movsesian, Sergei – G45 1. d4 e6 2. c4 Bb4+ 3. Nc3 c5 4. Nf3 d5 5. cxd5 exd5 6. dxc5 Nc6 7. Bg5 Nge7 8. e3 O-O 9. Be2 Qa5 10. O-O Bxc3
Turin ol (Men) 37th 2006 – Round 3 – Eljanov, Pavel – 1-0 – Kosic, Dragan – G34 1. d4 e6 2. c4 Bb4+ 3. Nd2 c5 4. a3 Bxd2+ 5. Qxd2 cxd4 6. Nf3 Nf6 7. Nxd4 O-O 8. e3 d5 9. b3 a6 10. Bb2 dxc4
Turin ol (Men) 37th 2006 – Round 7 – Kozul, Zdenko – 1/2-1/2 – Korchnoi, Viktor – G87 1. d4 e6 2. c4 Bb4+ 3. Nd2 c5 4. a3 Bxd2+ 5. Qxd2 cxd4 6. Nf3 Nf6 7. b4 Nc6 8. Nxd4 d5 9. cxd5 exd5 10. Nxc6 bxc6
World Blitz 2015 – Round 8.20 – Gelfand, Boris – 1/2-1/2 – Bartel, Mateusz – G476 1. d4 e6 2. c4 Bb4+ 3. Nd2 d5 4. Qa4+ Nc6 5. e3 Ne7 6. Nf3 O-O 7. a3 Bxd2+ 8. Bxd2 b6 9. b4 dxc4 10. Bxc4 Bb7
World Blitz 2015 – Round 9.23 – Dreev, Aleksey – 0-1 – Bartel, Mateusz – G541 1. d4 e6 2. c4 Bb4+ 3. Nd2 d5 4. e3 Nf6 5. Nf3 O-O 6. a3 Be7 7. b3 b6 8. Bb2 Bb7 9. Bd3 Ne4 10. Qc2 f5
World Blitz 2018 – Round 4.27 – Korobov, Anton – 1-0 – Demidov, Mikhail – G223 1. d4 e6 2. c4 Bb4+ 3. Nc3 Bxc3+ 4. bxc3 d6 5. e4 e5 6. Nf3 Qe7 7. Bd3 Nf6 8. c5 O-O 9. cxd6 cxd6 10. O-O Qc7
World Cup 1988 – Round 1 – Portisch, Lajos – 0-1 – Ljubojevic, Ljubomir – G24 1. d4 e6 2. c4 Bb4+ 3. Nd2 d5 4. e3 Nf6 5. Qa4+ Nc6 6. a3 Bxd2+ 7. Bxd2 Ne4 8. Nf3 Nxd2 9. Nxd2 O-O 10. Qc2 e5
Zurich CC Blitz 2014 – Round 3.1 – Gelfand, Boris – 0-1 – Caruana, Fabiano – G7 1. d4 e6 2. c4 Bb4+ 3. Nd2 d5 4. Qa4+ Nc6 5. e3 Nf6 6. Nf3 O-O 7. a3 Bd6 8. c5 Be7 9. b4 a6 10. Bb2 Ne4

A40p — Keres Defence

1.d4 e6 2.c4 Bb4+

Eval: [+0.34]

Les coups candidats

3.Bd2 — 60.5% (4485 parties) →

Ambassadeurs : Eingorn, Vereslav S (69x), Arkell, Keith C (64x), Kosic, Dragan (53x), Paehtz, Elisabeth (33x), Kovacevic, Blazimir (27x), Gulko, Boris (24x), Totsky, Leonid (22x), Etmans, Maarten (22x)

3.Nc3 — 24.0% (1777 parties)

Ambassadeurs : Kosic, Dragan (20x), Arkell, Keith C (19x), Brodie, Hugh (15x), Eingorn, Vereslav S (15x), Barcza, Gedeon (13x), Sher, Miron (12x), Skalkotas, Nikolaos (11x), Moskalenko, Viktor (9x)

3.Nd2 — 15.5% (1153 parties)

Ambassadeurs : Kosic, Dragan (25x), Eingorn, Vereslav S (18x), Paehtz, Elisabeth (17x), Markidis, Konstantinos (10x), Antic, Dejan (10x), Berczes, David (9x), Kozul, Zdenko (8x), Erdos, Viktor (8x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	3.Bd2	3.Nc3	3.Nd2
<1800	150	61%	30%	9%
1800-2200	1654	61%	28%	12%
2200-2600	4481	61%	21%	18%
2600+	249	65%	12%	23%

Évolution par décennie (% des parties)

Décennie	N parties	3.Bd2	3.Nc3	3.Nd2
1850s	1	—	100%	—
1860s	2	50%	50%	—
1870s	1	100%	—	—
1880s	3	—	100%	—
1910s	3	33%	—	67%
1920s	4	50%	—	50%
1930s	55	62%	31%	7%
1940s	22	55%	36%	9%
1950s	41	46%	46%	7%
1960s	89	37%	42%	21%
1970s	76	41%	39%	20%
1980s	395	65%	23%	12%
1990s	1322	58%	28%	14%
2000s	1686	63%	24%	13%
2010s	3143	61%	22%	18%
2020s	572	62%	21%	17%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
3.Bd2	61%	62%	▲ +1.7%
3.Nc3	22%	21%	▼ -0.9%
3.Nd2	18%	17%	▼ -0.9%

Joueurs célèbres

Champions du monde dans cette position

Alekhine, Alexander — 4 parties
Karpov, Anatoly — 4 parties
Carlsen, Magnus — 4 parties
Botvinnik, Mikhail — 3 parties
Ju, Wenjun — 3 parties
Kramnik, Vladimir — 3 parties
Euwe, Max — 2 parties
Smyslov, Vladimir — 2 parties
Karpov, Aleksandr — 2 parties
Steinitz, Wilhelm — 1 partie
Tal, Mikhail — 1 partie
Anand, Viswanathan — 1 partie
Ding, Liren — 1 partie
Hou, Yifan — 1 partie

Parties historiques

3.Bd2 — 60.5% (4485 parties)

1869 — Ware, Preston vs Jones, William B — 1-0 — New York (New York CC)
1877 — Riemann, Fritz vs Anderssen, Adolf — 1/2-1/2 — Breslau GER
1914 — Vidmar, Milan Sr vs Reti, Richard — 1-0 — Mannheim GER
1925 — Rubinstein, Akiba vs Levenfish, Grigory — 1-0 — Moscow RUS
1929 — Koltanowski, George vs Lazard, Frederic — 1/2-1/2 — Paris FRA

3.Nc3 — 24.0% (1777 parties)

1851 — Loewenthal, Johann vs Buckle, Henry — 0-1 — London ENG
1867 — Blackburne, Joseph vs MacDonnell, George — 0-1 — Dundee SCO
1882 — Steinitz, Wilhelm vs Englisch, Berthold — 1/2-1/2 — Vienna AUT
1883 — Salvioli, Carlo vs Crosara, Luigi — 1-0 — Venice ITA
1883 — Salvioli, Carlo vs Crosara, Gregorio — 1-0 — Venice ITA

3.Nd2 — 15.5% (1153 parties)

1912 — Schlechter, Carl vs Cohn, Erich — 1/2-1/2 — Breslau GER
1914 — Cohn, Erich vs Spielmann, Rudolf — 1/2-1/2 — Berlin GER
1925 — Gruenfeld, Ernst vs Levenfish, Grigory — 1/2-1/2 — Moscow RUS
1929 — Spielmann, Rudolf vs Becker, Albert — 1/2-1/2 — Carlsbad CZE
1934 — Flohr, Salo vs Becker, Albert — 1-0 — Bad Liebenwerda

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