Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→g3, h2→g3	—
Passés	—	—
Majorité	—	● aile dame 3v2

Cases

	♔ Blancs	♚ Noirs
Cases fortes	—	● b4 (3v0), ● d4 (2v1), ● d5 (2v1)
Cases faibles	—	—
Centre	● e4 (1v0)	● d4 (2v1), ● d5 (2v1)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● c	● d

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bg2	● Bg2 Ok (mob. 2)
Be6		● Be6 Actif (mob. 5)
Bf8		● Bf8 Non développé (mob. 5)
Paire de fous	● Oui	● Oui
Non développées	3 (● c1, ● a1, ● h1)	3 (● f8, ● 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	mobile
Ruptures	● d2-d4	—

A29q — English: Four Knights, 4.g3 d5 5.cxd5 Nxd5 6.Bg2 Be6

1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.g3 d5 5.cxd5 Nxd5 6.Bg2 Be6 * ○ Trait aux Blancs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plan principal. Mettre le roi à l'abri (O-O dans 86 % des parties).

Atouts. Les Blancs s'appuient sur la colonne semi-ouverte c.

Côté adverse. Le roi resté au centre.

En contrepartie. Le roi n'est pas encore à l'abri et plusieurs pièces dorment encore (le fou c1 et les tours a1 et h1).

Plans. O-O (Mettre le roi en sécurité, connecter les tours — 86 % des parties) ; d3 (Solidifier le centre — 9 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plan principal. Jeu au centre.

Atouts. Les Noirs s'appuient sur une majorité de pions à l'aile dame (3 contre 2), un contrôle dominant de b4, d4 et d5, un fou actif en e6 et la colonne semi-ouverte d.

Côté adverse. Un mauvais fou en c1 et le roi resté au centre.

En contrepartie. Le roi n'est pas encore à l'abri et plusieurs pièces dorment encore (le fou f8 et les tours a8 et h8).

Plans. ...Be7 (Fou actif (mobilité 8), Développer f8 — 56 % des parties) ; ...Nb6 (30 % des parties) ; ...Bc5 (Fou actif (mobilité 9), Développer f8 — 6 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Partie
1902 Monte Carlo – Round 9 – Mason, James – 1-0 – Mieses, Jacques – G44 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Be7 8. d4 exd4 9. Nxd4 Nxd4 10. Qxd4 Bf6
1927 Kecskemet II – Round 7 – Szekely, Janos Ferenc – 0-1 – Steiner, Laszlo – G20 1. c4 Nf6 2. Nc3 e5 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. Qa4 Nb6 8. Qe4 f5 9. Qh4 Be7 10. Qh5+ g6
1931 Argentina – Round 11 – Nogues Acuna, Alejandro – 1-0 – Iliesco, Juan – G35 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. d4 exd4 8. Nxd4 Nxd4 9. Qxd4 Nxc3 10. Qxc3 c6
1935 AUS Ch – Round 12 – Purdy, Cecil J S – 1/2-1/2 – Green Martin – G9 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Be7 8. d4 exd4 9. Nxd4 Nxd4 10. Qxd4 Bf6
1939 Bad Oeynhausen ch-GER – Round 8 – Heinicke, Herbert – 0-1 – Kohler, Alfred – G54 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. d3 Be7 8. O-O O-O 9. Bd2 Kh8 10. Qc1 f5
1942 Mar del Plata – Round 13 – Maderna, Carlos – 1-0 – Corte, Cesar J – G105 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Nb6 8. d3 Be7 9. a4 a6 10. a5 Nd5
1942 Mar del Plata ARG – Round ? – Maderna, Carlos – 1-0 – Corte, Cesar J – G4 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Nb6 8. d3 Be7 9. a4 a6 10. a5 Nd5
1942 USA Ch – Round 14 – Seidman, Herbert – 1-0 – Baker, Haris – G18 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nc3 Be6 6. Nf3 Nc6 7. O-O Be7 8. d4 exd4 9. Nxd4 Nxd4 10. Qxd4 Bf6
1945 Pan American – Round 1 – Araiza Munoz, Jose Joaquin – 1/2-1/2 – Kashdan, Isaac – G2 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. d3 Be7 8. O-O Nb6 9. Be3 O-O 10. Na4 Nd5
1945 Vina del Mar – Round 10 – Najdorf, Miguel – 1-0 – Letelier Martner, Rene – G32 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Be7 8. d3 O-O 9. Bd2 Kh8 10. a3 f5
1946 Gyor – Round 8 – Florian, Tibor – 1-0 – Bakonyi, Elek – G16 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Be6 7. O-O Nxc3 8. bxc3 Be7 9. d4 exd4 10. Nxd4 Nxd4
1946 San Francisco ARG – Round 2 – Maderna, Carlos – 1/2-1/2 – Pasero, Pedro – G4 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. d3 Be7 8. O-O Qd7 9. Bd2 O-O 10. Rc1 f6
1946 San Francisco ARG – Round 5 – Maderna, Carlos – 0-1 – Corte, Cesar J – G11 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Nb6 8. b3 Be7 9. Bb2 O-O 10. Rc1 f5
1947 Schlechter Memorial – Round 12 – Mueller, Hans – 1-0 – Palda, Karl – G39 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Be7 8. d4 exd4 9. Nxd4 Nxd4 10. Qxd4 Bf6
1948 It – Round ? – Kramer, Haije – 1/2-1/2 – Wood, Baruch – G2 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. d3 Be7 8. O-O O-O 9. d4 exd4 10. Nb5 Qd7
1950 Schiavno Zdroj – Round 1 – Zíta, František – 0-1 – Tarnowski, Alfred – G6 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Be6 7. O-O Be7 8. d4 Nxc3 9. bxc3 e4 10. Ne5 Qd5
1952 Helsinki olm – Round 1 – Szabo, Ladislav – 1-0 – Porreca, Giorgio – G4 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Nxc3 8. bxc3 Be7 9. d4 exd4 10. Nxd4 Nxd4
1954 Kiev ch-URS – Round 1 – Petrosian, Tigran A. – 1-0 – Bannik, Anatolij – G147 1. Nf3 d5 2. g3 Nc6 3. c4 Nf6 4. Bg2 e5 5. cxd5 Nxd5 6. Nc3 Be6 7. O-O Nb6 8. d3 Be7 9. Ne4 O-O 10. Bd2 Kh8
1954 Mar del Plata – Round 17 – Eliskases, Erich – 1-0 – Perez Alcocer, Jose – G129 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 e5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Be7 8. d4 exd4 9. Nb5 Nb6 10. Bf4 Nd5
1954 Mar del Plata ARG – Round 19 – Rossetto, Hector – 1-0 – Perez Alcocer, Jose – G17 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 e5 5. Bg2 Be6 6. Nf3 Nc6 7. d3 Be7 8. Bd2 O-O 9. O-O h6 10. a3 Nb6
1954 Munich zt – Round 5 – Fuderer, Andrija – 1-0 – Aitken, James – G28 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Be7 8. d4 exd4 9. Nb5 Bf6 10. Nfxd4 Nxd4
1955 Hastings5556 – Round 5 – Golombek, Harry – 0-1 – Penrose, Justin – G20 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Nb6 8. d3 Be7 9. Be3 O-O 10. Rc1 Qd7
1955 Manhattan CC Ch 5556 – Round 13 – Bisguier, Arthur B – 0-1 – Kevitz, Alexander – G57 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Be7 8. d4 exd4 9. Nb5 d3 10. Qxd3 O-O
1956 CSR Ch – Round 1 – Zíta, František – 1-0 – Jezek, Stanislav – G4 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Be6 7. O-O Be7 8. d4 Nxc3 9. bxc3 exd4 10. Nxd4 Nxd4
1956 Leningrad ch-URS – Round 1 – Ragozin, Viacheslav – 1-0 – Taimanov, Mark E – G15 1. c4 Nf6 2. g3 d5 3. Bg2 e5 4. cxd5 Nxd5 5. Nc3 Be6 6. Nf3 Nc6 7. O-O Nb6 8. a3 Be7 9. b4 O-O 10. d3 f6
1957 Poland – Round 4 – Baum Gutierrez, Ismael – 0-1 – Tarnowski, Alfred – G8 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Nb6 8. d3 f6 9. b3 Qd7 10. Bb2 Be7
1957 San Benedetto – Round 3 – Scafarelli, Francesco – 1/2-1/2 – Emden, H. – G12 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Nb6 8. d3 Be7 9. Be3 f5 10. Na4 Nxa4
1958 Argentina – Round 2 – Bolbochan, J. – 1-0 – Aguilar Espinosa, Alann Cr – G9 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Nb6 8. b3 Be7 9. Bb2 O-O 10. Rc1 f5
1958 Buenos Aires – Round 1 – Pelikán, Jiří – 0-1 – Corte, Cesar J – G1 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nc3 Be6 6. Nf3 Nc6 7. O-O Nxc3 8. bxc3 Bc5 9. Qa4 O-O 10. Rd1 Qe8
1958 Kiev Ch – Round 11 – Shianovsky, Vladislav I – 1/2-1/2 – Zamikhovsky, Abram – G50 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 e5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Be7 8. d4 Nxc3 9. bxc3 exd4 10. Nxd4 Nxd4
1958 Munich olm fin-B – Round 11 – Nilsson, Zandor – 0-1 – Tarnowski, Alfred – G49 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Nb6 8. b3 f6 9. Bb2 Qd7 10. d4 exd4
1958 YUG Ch 13th – Round 16 – Sofrevski, Jovan – 0-1 – Ivkovic, Dusan – G83 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Be6 7. O-O Be7 8. d4 Nxc3 9. bxc3 e4 10. Nd2 f5
1959 Dresden – Round 10 – Uhlmann, Wolfgang – 1-0 – Golz, Werner – G68 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nc3 Be6 6. Nf3 Nc6 7. d3 Be7 8. O-O Qd7 9. Ng5 Bxg5 10. Bxg5 f6
1959 Lima – Round 8 – Letelier Martner, Rene – 1-0 – Quinones Carrillo, Oscar – G40 1. c4 Nf6 2. Nc3 e5 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Be7 8. d4 exd4 9. Nxd4 Nxd4 10. Qxd4 Nxc3
1960 Leipzig olm prel – Round 6 – Bazan, Osvaldo – 1/2-1/2 – Seth BC – G189 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Be7 8. d3 O-O 9. Bd2 Nb6 10. a4 a5
1960 Leipzig olm prel – Round 7 – Clarke, Peter H – 1-0 – Hany Mohsen, Tamima – G224 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Be7 8. d4 exd4 9. Nxd4 Nxc3 10. bxc3 Nxd4
1960 Olympiad final A – Round 6 – Kozma, Julius – 1/2-1/2 – Milev, Zdravko – G12 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 e5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Nb6 8. d3 Be7 9. Be3 O-O 10. a3 Nd5
1960 Paignton Premier 10th – Round 3 – Ritson-Morry, William – 1/2-1/2 – Lavers, Norman – G10 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. d3 Be7 8. O-O O-O 9. a3 Nb6 10. Be3 f5
1960 Poland Ch – Round 13 – Gabrys, Zygmunt – 1/2-1/2 – Tarnowski, Alfred – G52 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nc3 Be6 6. Nf3 Nc6 7. d3 Be7 8. O-O O-O 9. Bd2 h6 10. Re1 Qd7
1961 Katowice ch18-POL – Round 5 – Balcerowski, Witold – 0-1 – Tarnowski, Alfred – G39 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Nb6 8. d3 Be7 9. Be3 f5 10. Na4 O-O
1962 Budapest-Warsaw m – Round ? – Lengyel, Levente – 1-0 – Adamski, Andrzej – G6 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Be6 7. O-O Nb6 8. d3 Be7 9. a3 O-O 10. b4 a6
1962 Paris 6263 – Round ? – Huguet, Bernard – 1-0 – Thiellement, Andre – G1 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Be7 8. d3 O-O 9. a3 Nxc3 10. bxc3 f5
1962 Torremolinos zt – Round 1 – Langeweg, Kick – 1/2-1/2 – Scafarelli, Francesco – G1 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 e5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Be7 8. d4 exd4 9. Nb5 O-O 10. Nbxd4 Nxd4
1962 Varna olm – Round 7 – Garcia Rodriguez, Raimundo – 0-1 – Abdel Aal Mohamed, Hussein – G282 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Be7 8. a3 O-O 9. Qc2 Qd7 10. b4 a6
1963 POL Ch 20th – Round 13 – Sliwa, Bogdan – 0-1 – Tarnowski, Alfred – G77 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nc3 Be6 6. Nf3 Nc6 7. Qa4 Nb6 8. Qc2 f6 9. O-O Qd7 10. a3 g5
1964 Southampton League Div 1 – Round 6.1 – Marshall, Peter L – 0-1 – Collins, Richard Arnold – G4 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Be7 8. d3 Nb6 9. Be3 O-O 10. d4 exd4
1965 Corr – Round 1 – Heemsoth, Hermann – 1/2-1/2 – Brummer, Bernfried – G4 1. c4 Nf6 2. Nc3 e5 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Nb6 8. d3 Be7 9. a4 a5 10. Be3 O-O
1965 Sinaia stud ol final – Round 3 – Ree, Hans – 0-1 – Kovacs, Laszlo M – G15 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. d4 Bb4 8. O-O Nxc3 9. bxc3 Bxc3 10. Rb1 O-O
1966 Hungary – Round 1 – Barcza, Gedeon – 1-0 – Cs. Kovacs, Laszlo – G96 1. g3 e5 2. c4 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nc3 Be6 6. Nf3 Nc6 7. O-O Nb6 8. d3 Be7 9. Be3 f5 10. Na4 Nd5
1966 Hungary – Round 1 – Barcza, Gedeon – 1/2-1/2 – Pogats, Jozsef Jr. – G100 1. g3 e5 2. c4 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nc3 Be6 6. Nf3 Nc6 7. O-O Nb6 8. d3 Be7 9. Be3 O-O 10. d4 exd4
1966 Hungary – Round 1 – Kluger, Gyula – 0-1 – Kovacs, Laszlo M – G9 1. c4 Nf6 2. Nc3 e5 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Nb6 8. d3 f6 9. Be3 Qd7 10. Ne4 Nd5
1966 La Habana olm fin-C – Round 12 – Letelier Martner, Rene – 1/2-1/2 – Naranja, Renato – G33 1. g3 e5 2. Bg2 Nf6 3. c4 d5 4. cxd5 Nxd5 5. Nc3 Be6 6. Nf3 Nc6 7. O-O Nb6 8. d3 f6 9. Be3 Qd7 10. d4 O-O-O
1968 Hungary – Round 1 – Forintos, Gyozo V – 1-0 – Sapi, Laszlo – G10 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Nb6 8. d3 Be7 9. a3 a5 10. Be3 O-O
1968 Lublin PKWN 4th – Round 5 – Szilagyi, Gyorgy Laszlo – 1-0 – Kovacs, Laszlo M – G14 1. c4 Nf6 2. g3 e5 3. Nc3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. Ng5 Qxg5 8. Nxd5 O-O-O 9. d3 Qh5 10. Nc3 Nd4
1968 Lugano ol (Men) qual-B – Round 3 – Lombardy, William J – 1/2-1/2 – Kinzel, Alfred – G9 1. g3 e5 2. Bg2 d5 3. c4 Nf6 4. cxd5 Nxd5 5. Nc3 Be6 6. Nf3 Nc6 7. O-O Be7 8. d3 O-O 9. Bd2 Qd7 10. Re1 Rad8
1968 Lugano ol (Men) qual-E – Round 1 – Schmid, Leo – 1-0 – Abad Martinez, Diego – G2 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Be6 7. O-O Be7 8. d4 exd4 9. Nxd4 Nxd4 10. Qxd4 Nxc3
1968 Mar del Plata ch-ARG – Round 6 – Pelikan, Jan – 1-0 – Incutto, Carlos – G40 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. d3 Be7 8. Bd2 O-O 9. O-O Qd7 10. a3 a5
1968 Monte Carlo – Round 7 – Botvinnik, Mikhail – 1-0 – Portisch, Lajos – G40 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Nb6 8. d3 Be7 9. a3 a5 10. Be3 O-O
1969 Mar del Plata zt – Round ? – Schweber, Samuel – 1/2-1/2 – Van Riemsdijk, Herman C. – G48 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Be6 7. O-O Be7 8. d4 exd4 9. Nb5 Qd7 10. Nbxd4 Nxd4
1969 Praia da Rocha zt – Round 7 – Filip, Miroslav – 1-0 – Cordovil, Joao – G19 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nc3 Be6 6. Nf3 Nc6 7. O-O Be7 8. d4 exd4 9. Nxd4 Nxd4 10. Qxd4 Bf6
1969 Raach zt – Round 6 – Ivkov, Borislav – 1/2-1/2 – Dueckstein, Andreas – G62 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Be7 8. d3 O-O 9. Bd2 f5 10. a3 Bf6
1969 Tallinn it – Round 5 – Book, Eero – 0-1 – Tarve, Udo – G19 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. d3 Be7 8. O-O O-O 9. Bd2 f6 10. a3 Nd4
1970 Palma de Mallorca Interzonal – Round 18 – Ivkov, Borislav – 1/2-1/2 – Addison, William G – G16 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Nb6 8. d3 Be7 9. Be3 O-O 10. Qc1 f5
1970 Vinkovci – Round 12 – Petrosian, Tigran L. – 1-0 – Taimanov, Mark – G7 1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Be6 7. O-O Nb6 8. a3 Be7 9. b4 O-O 10. d3 a5
1970 Vinkovci – Round 12 – Petrosian, Tigran V. – 1-0 – Taimanov, Mark – G10 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Be6 7. O-O Nb6 8. a3 Be7 9. b4 O-O 10. d3 a5
1971 Hoogovens – Round 10 – Korchnoi, Viktor – 1/2-1/2 – Ivkov, Borislav – G9 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Be6 7. O-O Nb6 8. d3 Be7 9. a3 O-O 10. b4 a6
1972 Skopje ol (Men) fin-A – Round 15 – Ree, Hans – 1/2-1/2 – Smejkal, Jan – G44 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Be6 7. O-O Be7 8. d4 Nxc3 9. bxc3 e4 10. Nd2 f5
FIDE World Cup 2025 – Round R1 Classical 1 – Meier Georg – 1-0 – Neelash Saha – G43 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Bb4+ 5. Bd2 Be7 6. Bg2 O-O 7. O-O Nbd7 8. b4 c6 9. a4 Ne4 10. Qb3 Nb6
Lindores Abbey Tal Memorial 2021 – Round 10.45 – Rakhmanov, Aleksandr – 0-1 – Divya Deshmukh – G459 1. c4 Nf6 2. Nc3 e5 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. O-O Be7 8. d4 exd4 9. Nxd4 Nxc3 10. bxc3 Nxd4

A29q — Four Knights (1902)

1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.g3 d5 5.cxd5 Nxd5 6.Bg2 Be6

Les coups candidats

7.O-O — 81.4% (1724 parties)

Ambassadeurs : Dueckstein, Andreas (9x), Roeder, Gerd, Dr. (8x), Tarnowski, Alfred (5x), Sarosy, Zoltan L (5x), Sedlacek, Jiri (4x), Cohen, David (4x), Preo, Nicolas A (3x), Taimanov, Mark (3x)

7.d3 — 13.0% (275 parties)

Ambassadeurs : Bujak, Michal (2x), Trushina, Marina (2x), Uhlmann, Wolfgang (1x), Golz, Werner (1x), Gabrys, Zygmunt (1x), Tarnowski, Alfred (1x), Pelikan, Jorge (1x), Incutto, Carlos (1x)

7.Qa4 — 1.8% (39 parties)

Ambassadeurs : Sliwa, Bogdan (1x), Tarnowski, Alfred (1x), Malliaros, Stavros (1x), Efthimiou, Efthimios (1x), Skopelitis, T. (1x), Grivas, Efstratios (1x), Deleyn, Gunter (1x), Tiller, Bjorn (1x)

7.d4 — 1.4% (30 parties)

Ambassadeurs : Laux, Philipp (2x), Ree, Hans (1x), Kovacs, Laszlo (1x), Dizdarevic, Emir (1x), Lecuyer, Christian (1x), Ost-Hansen, Jacob (1x), Borngaesser, Rene (1x), Pakmor W (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	7.O-O	7.d3	7.Qa4	7.d4
<1800	246	75%	18%	2%	2%
1800-2200	962	79%	15%	2%	1%
2200-2600	343	87%	8%	1%	2%
2600+	5	80%	—	—	—

Évolution par décennie (% des parties)

Décennie	N parties	7.O-O	7.d3	7.Qa4	7.d4
1950s	32	91%	9%	—	—
1960s	60	83%	12%	2%	2%
1970s	68	81%	12%	6%	1%
1980s	93	90%	6%	1%	1%
1990s	398	83%	11%	1%	1%
2000s	635	81%	13%	2%	1%
2010s	682	80%	15%	2%	1%
2020s	149	75%	18%	1%	2%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
7.O-O	80%	75%	▼ -5.0%
7.d3	15%	18%	▲ +3.5%
7.Qa4	2%	1%	-0.3%
7.d4	1%	2%	▲ +0.5%

Joueurs célèbres

Champions du monde dans cette position

Botvinnik, Mikhail — 1 partie
Kasparov, Garry — 1 partie
Kramnik, Vladimir — 1 partie

Parties historiques

7.O-O — 81.4% (1724 parties)

1950 — Al Husari, Zita Fatima vs Tarnowski, Alfred — 0-1 — Schiavno Zdroj
1951 — De Carbonnel, Heinz vs Friedrich, Gerd — 1-0 — ?
1952 — Szabo, Laszlo vs Porrecca, Giorgio — 1-0 — Helsinki FIN
1953 — Moiseev, Oleg vs Lilienthal, Andor — 0-1 — Moscow RUS
1953 — Moiseev, Viktor vs Lilienthal, Andor — 0-1 — Moscow RUS

7.d3 — 13.0% (275 parties)

1954 — Rossetto, Hector vs Perez Alcocer, Jose — 1-0 — Mar del Plata ARG
1955 — Boutteville, Cesar vs Noradounghian, Georges — 1/2-1/2 — Toulouse FRA
1959 — Uhlmann, Wolfgang vs Golz, Werner — 1-0 — Dresden GER
1960 — Gabrys, Zygmunt vs Tarnowski, Alfred — 1/2-1/2 — Poland ch
1960 — Ritson-Morry, William vs Lavers, Norman — 1/2-1/2 — Paignton

7.Qa4 — 1.8% (39 parties)

1963 — Sliwa, Bogdan vs Tarnowski, Alfred — 0-1 — Glucholazy
1972 — Roos, Michel vs Thiellement, Andre — 1/2-1/2 — Rosny sous Bois
1975 — Deleyn, Gunter vs Tiller, Bjorn — 1-0 — Groningen NED
1977 — Malliaros, Stavros vs Efthimiou, Efthimios — 0-1 — Athens,Greece
1979 — Skopelitis, T. vs Grivas, Efstratios — 0-1 — Athens GRE

7.d4 — 1.4% (30 parties)

1965 — Ree, Hans vs Kovacs, Laszlo — 0-1 — ?
1971 — Ost-Hansen, Jacob vs Borngaesser, Rene — 0-1 — Groningen NED
1985 — Dizdarevic, Emir vs Lecuyer, Christian — 1-0 — Avoine op
1992 — Robles Cordero, David Rafael vs Ivan Granados — 1-0 — ?
1997 — Pakmor W vs Laux, Philipp — 0-1 — ?

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