B45u — Sicilian: Taimanov, Four Knights, 6.Ndb5 Bb4 7.a3, 9.ed5 ed5 10.Bd3 O-O

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Nf6 6.Ndb5 Bb4 7.a3 Bxc3+ 8.Nxc3 d5 9.exd5 exd5 10.Bd3 O-O * ○ Trait aux Blancs

Ouverture — Centre asymétrique

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plan principal. Exploiter la case forte b5.

Atouts. Les Blancs s'appuient sur une majorité de pions à l'aile_dame (3 contre 2), la case forte b5, un fou actif en d3, la paire de fous et la colonne semi-ouverte d.

Côté adverse. Le pion isolé d5 et le fou enfermé en c8.

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) ; Bg5 (Clouer Nf6).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

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

Atouts. Les Noirs s'appuient sur une majorité de pions à l'centre (1 contre 0), la case forte g4 et la colonne semi-ouverte c.

Côté adverse. Le fou enfermé en c1 et le roi resté au centre.

En contrepartie. Plusieurs pièces dorment encore (le fou c8 et la tour a8) et le pion isolé d5.

Plans. ...d4 (Rupture).

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	● d5
Arriérés	—	—
Chaînes	● b2→a3	—
Passés	—	—
Majorité	● aile_dame 3v2	● centre 1v0

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● b5 (2v0)	● g4 (2v1)
Cases faibles	● e4	—
Centre	—	● d4 (1v0), ● d5 (2v1), ● e5 (1v0)

Colonnes et diagonales

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

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bd3	● Bd3 Actif (mob. 9)
Bc8		● Bc8 Non développé (mob. 5)
Paire de fous	● Oui	Non
Non développées	3 (● c1, ● a1, ● h1)	2 (● 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	asymétrique
Ruptures	● f2-f3	● …d5-d4

Partie
1900 London ENG – Round 12 – Physick, Thomas – 0-1 – Blackburne, Joseph – G20 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1901 Monte Carlo Monte Carlo MNC – Round 5 – Janowski, Dawid – 1-0 – Blackburne, Joseph – G8 1. e4 c5 2. Nc3 Nc6 3. Nf3 e6 4. d4 cxd4 5. Nxd4 Nf6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1902 DSB-13.Kongress – Round 10 – Levin Astorga, Nicolas Daniel – 1/2-1/2 – Mieses, Jacques – G44 1. e4 c5 2. Nf3 e6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 Nf6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1903 It (Men) Monte Carlo MNC – Round 12 – Marco, Georg – 1-0 – Marchand, Max – G57 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 O-O 9. Bd3 d5 10. exd5 exd5
1903 RUS-ch03 – Round 3 – Znosko-Borovsky, Eugene – 1-0 – Duz-Khotimirsky, Fedor Ivanovich – G11 1. e4 c5 2. Nf3 Nc6 3. Nc3 e6 4. d4 cxd4 5. Nxd4 Nf6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1905 Scheveningen – Round 1 – Leussen, Benjamin – 0-1 – Te Kolste, Jan Willem – G6 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1911 San Sebastian – Round 11 – Burn, Amos – 0-1 – Tarrasch, Siegbert – G69 1. e4 c5 2. Nc3 e6 3. Nf3 Nc6 4. d4 cxd4 5. Nxd4 Nf6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1921 Carrasco – Round 8 – De Freitas, Jose Renato Silva – 0-1 – Villegas, Benito – G24 1. e4 c5 2. Nf3 e6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 Nf6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1937 Trebitsch mem3738 – Round 8 – Steiner, Lajos – 1/2-1/2 – Becker, Albert – G31 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1938 Krakow Krakow POL – Round ? – Gruenfeld, Ernst – 1/2-1/2 – Bluemich, Max – G6 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1942 Mar del Plata – Round 11 – Pilnik, Herman – 0-1 – Bolbochan, J. – G94 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1942 Mar del Plata – Round 8 – Michel, Pascal – 1/2-1/2 – Najdorf, Miguel – G68 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1943 Salzburg – Round 1 – Bogoljubow, Efim – 1-0 – Foltys, Jan – G16 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1947 Chigorin Memorial – Round ? – Plater, Kazimierz – 1/2-1/2 – Trifunovic, Petar – G93 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1947 La Plata-New York radio m – Round 1 – Denker, Arnold S – 1/2-1/2 – Bolbochan, J. – G5 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1947 Leningrad ch-URS – Round 12 – Boleslavsky, Isaac – 1-0 – Kan, Ilya A – G120 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1947 Moscow – Round 1 – Plater, Kazimierz – 1/2-1/2 – Trifunovic, Petar – G21 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1948 BRD Ch – Round 14 – Rellstab, Ludwig – 1-0 – Greis Heinz – G15 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1948 CSR Ch Bratislava SVK – Round 1 – Florian, Jaromir – 1-0 – Foltys, Jan – G2 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1948 Saltsjobaden Interzonal – Round 3 – Boleslavsky, Isaac – 1-0 – Trifunovic, Petar – G26 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1949 URS Ch, semi final – Round 1 – Cherepkov, Alexander V – 1/2-1/2 – Abramov, Leonid – G50 1. e4 c5 2. Nc3 e6 3. Nge2 Nc6 4. d4 cxd4 5. Nxd4 Bb4 6. Nb5 Nf6 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1949 Zagreb ch YUG – Round 18 – Avirovic, Djordje – 1-0 – Nedeljkovic, Srecko M – G38 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1951 Marianske Lazne zt – Round 17 – Foltys, Jan – 1-0 – Sajtar, Jaroslav – G112 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1952 Moscow Ch – Round 1 – Chistiakov, Alexander – 1/2-1/2 – Ravinsky, Grigory – G4 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1953 Hoogovens – Round 1 – Rossolimo, Nicolas – 1/2-1/2 – Toran Albero, Roman – G12 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1954 CSR Ch sf – Round 12 – Marsalek, Josef – 1/2-1/2 – Altschul, Milos – G51 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1954 Gorki ch22-SU sf – Round 2 – Uusi, Gunnar – 1-0 – Yudovich, Mikhail M – G17 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1954 URS Ch sf – Round 7 – Kondratiev, Pavel E – 1/2-1/2 – Kan, Ilya A – G2 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1954 URS Team Ch – Round 8 – Kopaev, Nikolay A – 0-1 – Novopashin, Arkady – G147 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1955 CSR Ch – Round 4 – Jezek, Jaroslav – 1/2-1/2 – Hostinsky, Zdenek – G28 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1955 CSR Ch – Round 8 – Kozma, Julius – 0-1 – Alster, Ladislav – G64 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1955 Moscow – Round 1 – Rubtsova, Olga – 0-1 – Keller-Hermann, Edith – G8 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1955 USSR – Round 1 – Cherepkov, Alexander V – 1/2-1/2 – Antoshin, Vladimir S – G1 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1956 Moscow olm fin-A – Round 7 – Ivkov, Borislav – 1/2-1/2 – Soos, Balint – G117 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1957 HUN Ch Budapest HUN – Round ? – Honfi, Karoly – 1/2-1/2 – Bilek, Istvan – G33 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1957 Moskou ch-URS – Round 7 – Keres, Paul – 1/2-1/2 – Stolyar, E. – G72 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1957 Wageningen zt – Round 2 – Olafsson, Fridrik – 1-0 – Teschner, Rudolf – G12 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1958 HUN Ch 14th – Round 14 – Szabo, Laszlo – 1/2-1/2 – Bilek, Istvan – G35 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nb5 Nf6 6. N1c3 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1958 Munich olm prel – Round 1 – Andersen, Borge – 1-0 – Stahlberg, Gideon – G21 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1958 YUG Ch 13th – Round 3 – Djurasevic, Bozidar – 0-1 – Ciric, Dragoljub M – G18 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1959 Buenos Aires VC – Round 1 – Fedorovsky, R. – 1-0 – Bolbochan, J. – G5 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1959 Krakow – Round 10 – Brzozka, Stefan – 1/2-1/2 – Orbaan, Constant – G34 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1959 Marianske Lazne – Round 7 – Jensen, Erik Bartram – 1/2-1/2 – Radovici, Corvin – G50 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1959 Zuerich – Round ? – Tal, Mikhail – 1-0 – Olafsson, Fridrik – G96 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1960 Aalborg – Round 1 – Nielsen, Axel – 1-0 – Hansen, Victor – G31 1. Nf3 c5 2. e4 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1960 BUL-ch14 – Round 18 – Chipev Teodor – 1-0 – Karastoichev, Emil – G18 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1960 Corr – Round 1 – berni samir – 0-1 – Palmiotto, Fiorentino – G7 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1960 WchT U26 07th – Round 7 – Gibbs, Peter Campbell – 0-1 – Marsalek, Josef – G17 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1961 Belgrade – Round 1 – Geller, Efim P – 1-0 – Ciric, Dragoljub M – G34 1. Nf3 c5 2. e4 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1961 CSR Ch – Round 11 – Pachman, Ludek – 1-0 – Marsalek, Josef – G104 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1961 CSR Ch – Round 18 – Acosta Fabian, Janna Paloma – 1/2-1/2 – Marsalek, Josef – G168 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1961 CSR Ch – Round 2 – Marsalek, Josef – 1-0 – Skacel, Jan – G16 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1961 Mar del Plata – Round 9 – Quinones Carrillo, Oscar – 0-1 – Letelier Martner, Rene – G84 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 Bb4 6. Nb5 Nf6 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1961 Oberhausen etc – Round 10.6 – Honfi, K. – 0-1 – Ciric, Dimitrije – G257 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1961 Zuerich – Round 1 – Matulovic, Milan – 1-0 – Lombardy, William J – G5 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1964 EU Ch U20 Niemeyer 3rd – Round 5 – Huebner, Robert – 1-0 – Hoelzl, Franz – G14 1. e4 c5 2. Ne2 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1964 FRG Ch qual 9th – Round 9 – Huebner, Robert – 1/2-1/2 – Degenhardt, Norbert – G31 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1965 Chigorin Memorial – Round 11 – Unzicker, Wolfgang – 1-0 – Damjanovic, Mato – G52 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1965 Chigorin Memorial – Round 7 – Ciric, Dragoljub M – 1/2-1/2 – Damjanovic, Mato – G33 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1965 Tallinn ch-URS – Round 1 – Keres, Paul – 1/2-1/2 – Bukhman, Eduard – G95 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1966 Rubinstein Memorial 04th – Round 12 – Bednarski, Jacek B – 1/2-1/2 – Pietrusiak, Bogdan – G69 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1967 HUN Ch Budapest HUN – Round 6 – Haag, Ervin – 1-0 – Forintos, Gyozo V – G24 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1967 Sousse Interzonal – Round 13 – Matanovic, Aleksandar – 1/2-1/2 – Sarapu, Ortvin – G121 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1967 Sweden (ch) – Round 15 – Kinnmark, Ove – 1/2-1/2 – Martens, Rolf – G77 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
1968 Lasker Memorial – Round ? – Suetin, Alexey S – 1/2-1/2 – Zinn, Lothar – G37 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
9. Sinquefield Cup 2022 – Round 6.3 – Nepomniachtchi, Ian – 1/2-1/2 – Caruana, Fabiano – G26 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
GCT Blitz Paris 2021 – Round 1.1 – Nepomniachtchi, Ian – 1/2-1/2 – Rapport, Richard – G1 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O
World Blitz 2023 – Round 12.68 – Pranav, V – 0-1 – Garayev, Kanan – G720 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O

B45u — Taimanov Four Knights

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Nf6 6.Ndb5 Bb4 7.a3 Bxc3+ 8.Nxc3 d5 9.exd5 exd5 10.Bd3 O-O

Les coups candidats

11.O-O — 99.7% (3361 parties)

Ambassadeurs : Van Riemsdijk, Herman C. (31x), Khenkin, Igor (18x), Rogozenco, Dorian (15x), Stein, Bernd (14x), Goncharenko, Georgy (13x), Grobler, David (12x), Tregubov, Pavel V. (11x), Maljutin, Evgeni (9x)

11.Bg5 — 0.1% (4 parties)

Ambassadeurs : Caldeira, Adriano (1x), Dianda, Joao Carlos (1x), Schweizer, Robert (1x), Eggenberger, Werner (1x), Villing, Dieter (1x), Van den Berg, Ad (1x), Lagarde, Maxime (1x), Sokolov, Andrei (1x)

11.h3 — 0.1% (3 parties)

Ambassadeurs : Cop, Tomislav (1x), Nagrajsalovic, Miroslav (1x), Yi, Danny (1x), Colbow, Collin (1x), Cave, Iwan (1x), Liu, Tianyi (Jack) (1x)

11.Bf4 — 0.0% (1 parties)

Ambassadeurs : Westerinen, Heikki M.J. (1x), Martens, Martin (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	11.O-O	11.Bg5	11.h3	11.Bf4
<1800	97	100%	—	—	—
1800-2200	1175	100%	0%	0%	—
2200-2600	1582	100%	0%	0%	—
2600+	48	100%	—	—	—

Évolution par décennie (% des parties)

Décennie	N parties	11.O-O	11.Bg5	11.h3	11.Bf4
1900s	15	100%	—	—	—
1910s	1	100%	—	—	—
1920s	1	100%	—	—	—
1930s	3	100%	—	—	—
1940s	15	100%	—	—	—
1950s	50	100%	—	—	—
1960s	73	99%	—	—	1%
1970s	77	100%	—	—	—
1980s	130	100%	—	—	—
1990s	460	100%	0%	—	—
2000s	1092	100%	—	0%	—
2010s	1009	100%	0%	—	—
2020s	444	99%	0%	0%	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
11.O-O	100%	99%	▼ -0.6%
11.Bg5	0%	0%	+0.1%
11.h3	0%	0%	+0.5%
11.Bf4	0%	0%	+0.0%

Joueurs célèbres

Champions du monde dans cette position

Kramnik, Vladimir — 3 parties
Kasparov, Garry — 2 parties
Alekhine, Alexander — 1 partie
Tal, Mikhail — 1 partie
Karpov, Anatoly — 1 partie
Anand, Viswanathan — 1 partie

Parties historiques

11.O-O — 99.7% (3361 parties)

1900 — Physick, Thomas vs Blackburne, Joseph — 0-1 — London ENG
1901 — Janowski, Dawid vs Blackburne, Joseph — 1-0 — Monte Carlo Monte Carlo MNC
1901 — Kruger, Paul vs Olland, Adolf George — 0-1 — Haarlem NED
1902 — Gottesman L vs Alekhine, Alexander — 1-0 — ?
1902 — Levin Astorga, Nicolas Daniel vs Mieses, Jacques — 1/2-1/2 — Hannover GER

11.Bg5 — 0.1% (4 parties)

1999 — Caldeira, Adriano vs Dianda, Joao Carlos — 1-0 — Sao Paulo BRA
1999 — Schweizer, Robert vs Eggenberger, Werner — 0-1 — SWZ-ch Graechen
2011 — Villing, Dieter vs Van den Berg, Ad — 1/2-1/2 — Bad Sooden
2023 — Lagarde, Maxime vs Sokolov, Andrei — 1/2-1/2 — Chartres FRA

11.h3 — 0.1% (3 parties)

2005 — Cop, Tomislav vs Nagrajsalovic, Miroslav — 0-1 — Zagreb CRO
2022 — Yi, Danny vs Colbow, Collin — 1/2-1/2 — Magdeburg GER
2024 — Cave, Iwan vs Liu, Tianyi (Jack) — 1-0 — Hull ENG

11.Bf4 — 0.0% (1 parties)

1968 — Westerinen, Heikki M.J. vs Martens, Martin — 0-1 — Goteborg SWE

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