C86g — Spanish: Worrall Attack, 7…O-O 8.c3 d6

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Qe2 b5 7.Bb3 O-O 8.c3 d6 * ○ Trait aux Blancs

Ouverture — Centre fermé

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Atouts. Les Blancs s'appuient sur la case forte d5, un fou actif en b3 et la paire de fous.

Côté adverse. Les fous enfermés en e7 et c8.

En contrepartie. Plusieurs pièces dorment encore (le cavalier b1, le fou c1 et la tour a1).

Plans. Nc3 (Développer Nb1) ; d3 (Libérer Bc1) ; h3 (Empêcher ...Bg4) ; Bc2 (Anticiper ...Na5).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Atouts. Les Noirs s'appuient sur la case forte g4 et la paire de fous.

Côté adverse. Le fou enfermé en c1.

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

Plans. ...Bg4 (Développer Bc8, clouer Nf3) ; ...Na5 (Attaquer Bb3) ; ...d5 (Rupture).

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● b2→c3, d2→c3	● a6→b5, d6→e5, c7→d6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● d5 (2v1)	● g4 (2v0)
Cases faibles	—	—
Centre	● d5 (2v1)	● e5 (2v1)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bb3	● Bb3 Actif (mob. 7)
Be7		● Be7 Enfermé (mob. 0)
Bc8		● Bc8 Non développé (mob. 6)
Paire de fous	● Oui	● Oui
Clouages	—	● pawn f7
Non développées	3 (b1, c1, a1)	2 (c8, a8)

Sécurité du roi

	♔ Blancs	♚ Noirs
Statut	● Roqué	● Roqué
Droits de roque	—	—

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	fermé
Ruptures	● c3-c4, ● d2-d3	● …d6-d5

Partie
1928 The Hague ol (Men) – Round 1 – Weenink, Henri – 1/2-1/2 – Stoltz, Gosta – G7 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
1930 San Remo – Round 1 – Alekhine, Alexander – 1-0 – Monticelli, Mario – G78 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 d6 8. c3 O-O 9. a4 Rb8 10. axb5 axb5
1931 Prague ol Prague CZE – Round 5 – Yates, Frederic D – 1-0 – Vajda, Arpad – G19 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 d6 6. c3 b5 7. Bb3 Be7 8. O-O O-O 9. h3 Na5 10. Bc2 c5
1933 New York – Round 11 – Horowitz, Albert Israel – 1/2-1/2 – Willmoth, Robert F – G28 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1937 Bad Nauheim/Stuttgart/Garmisch – Round 2 – Alekhine, Alexander – 1-0 – Saemisch, Friedrich – G4 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 d6 8. c3 O-O 9. a4 Bg4 10. h3 Bh5
1937 Ostende – Round 6 – List, Paul – 1-0 – Grob, Henry – G29 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 b5 6. Bb3 Be7 7. O-O O-O 8. c3 d6 9. a4 Bd7 10. d3 Na5
1937 Trebitsch mem3738 – Round 9 – Becker, Albert – 1-0 – Adam, Hermann – G35 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 b5 6. Bb3 Be7 7. O-O O-O 8. c3 d6 9. a4 Rb8 10. axb5 axb5
1939 Buenos Aires ol f-A – Round 9 – Pleci, Isaias – 1-0 – Planas Garcia, Francisco – G178 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. Qe2 O-O 8. c3 d6 9. Bc2 Bg4 10. h3 Bh5
1943 Prague – Round 17 – Prucha, Karel – 1/2-1/2 – Urbanec, Karel – G140 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 d6 7. c3 Be7 8. Qe2 O-O 9. Bc2 Ne8 10. d4 Bg4
1946 Maastricht – Round 1 – Vinken, Alex – 0-1 – Alexander Ronald Cheng – G8 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. h3 Be6 10. Bc2 d5
1947 Mar del Plata – Round 11 – Rossetto, Hector – 1-0 – Bolbochan, J. – G98 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 b5 6. Bb3 Be7 7. O-O O-O 8. c3 d6 9. d3 Na5 10. Bc2 c5
1947 Moscow Ch – Round 1 – Chistiakov, Alexander – 1/2-1/2 – Bronstein, David I – G28 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 Be7 6. O-O b5 7. Bb3 O-O 8. c3 d6 9. a4 b4 10. a5 Be6
1947 Moscow RUS – Round 1 – Chistiakov, Alexander – 0-1 – Zagoriansky, Evgeny – G22 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 Be7 6. O-O b5 7. Bb3 O-O 8. c3 d6 9. a4 Bb7 10. d4 bxa4
1948 Hastings4849 – Round 7 – Bellod Thomas, Gonzalo – 1/2-1/2 – Schmidt, Pascal – G26 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
1948 Mar del Plata – Round 1 – Rossetto, Hector – 1/2-1/2 – Bolbochan, J. – G16 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 b5 6. Bb3 Be7 7. O-O O-O 8. c3 d6 9. d3 Na5 10. Bc2 c5
1949 JUG Ch – Round 18 – Janosevic, Dragoljub – 0-1 – Gligorić, Svetozar – G69 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. a4 Bg4 10. h3 Bh5
1949 Zagreb ch YUG – Round 16 – Fuderer, Andrija – 1-0 – Bozic, Aleksandar – G35 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 d6 8. c3 O-O 9. a4 Bg4 10. axb5 axb5
1949 Zagreb ch YUG – Round 19 – Matanovic, Aleksandar – 1/2-1/2 – Ivkov, Borislav – G41 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. d3 Na5 10. Bc2 c5
1950 URS Ch sf – Round 13 – Dubinin, Peter – 1-0 – Levenfish, Grigory – G17 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1951 Mar del Plata zt – Round 6 – Flores Alvarez, Rodrigo – 1-0 – Bolbochan, J. – G58 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. a4 Na5 10. Bc2 Be6
1952 Havana – Round 1 – Cobo Arteaga, Eldis – 1/2-1/2 – Jimenez Zerquera, Eleazar – G30 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. a4 Rb8 10. axb5 axb5
1952 Helsinki olm – Round 1 – Bhaskar Jyoti Koch – 1-0 – Lokvenc, Josef – G165 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
1952 Miedzyzdroje – Round 1 – Koch, Berthold – 1-0 – Litmanowicz, Wladyslaw – G5 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1952 Saltsjobaden Interzonal – Round 2 – Pilnik, Herman – 1-0 – Pachman, Ludek – G16 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1953 BUL-DDR m – Round 2.4 – Bobekov, Radko – 1/2-1/2 – Krause, Kurt – G14 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
1954 Amsterdam olm – Round 1 – Keres, Paul – 1-0 – Donner, Jan-Hein – G57 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 d6 8. c3 O-O 9. a4 Na5 10. Bc2 Be6
1954 New York ch-USA – Round 2 – Bisguier, Arthur B – 1/2-1/2 – Rossolimo, Nicolas – G9 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 b5 6. Bb3 Be7 7. c3 O-O 8. O-O d6 9. a4 b4 10. a5 Be6
1954 Pan American Ch 2nd – Round 1 – Rivise, Irving – 1-0 – Lapiken, Peter Petrovich – G12 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. a4 Bg4 10. Rd1 Na5
1955 BCF Ch 42nd – Round 9.3 – Aitken, James – 1/2-1/2 – Phillips, Alan – G10 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
1955 URS-USA telex – Round 4 – Pavey, Max – 0-1 – Petrosian, Tigran A. – G19 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. d3 Na5 10. Bc2 c5
1955 Zagreb – Round 10 – Bisguier, Arthur B – 0-1 – Karaklajic, Nikola – G107 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 b5 6. Bb3 Be7 7. c3 O-O 8. O-O d6 9. a4 Bb7 10. d4 exd4
1956 CSR Ch – Round 2 – Jezek, Stanislav – 1/2-1/2 – Sidlo, Oldrich – G17 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 d6 6. c3 Be7 7. O-O b5 8. Bb3 O-O 9. a4 Na5 10. Bc2 Be6
1956 CSR Ch sf – Round 9 – Smetana, Jaroslav – 0-1 – Dolezal, Jiri – G26 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. a4 Bb7 10. d4 Qe8
1956 GDR Ch Leipzig GER – Round 5 – Bauer, Erich – 0-1 – Fuchs, Reinhart – G12 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 b5 6. Bb3 Be7 7. c3 O-O 8. O-O d6 9. d3 Na5 10. Bc2 c5
1956 Leningrad ch-URS – Round 1 – Tolush, Alexander – 0-1 – Bannik, Anatolij – G108 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 Be7 6. O-O b5 7. Bb3 d6 8. c3 O-O 9. d3 Na5 10. Bc2 c5
1956 Marianske Lazne/Praha – Round 6 – Jezek, Jaroslav – 1/2-1/2 – Pachman, Ludek – G41 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 Be7 6. c3 b5 7. Bb3 O-O 8. O-O d6 9. h3 Na5 10. Bc2 c5
1956 Moscow olm prel – Round 3 – Wantz, Fernand – 0-1 – Najdorf, Miguel – G101 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
1956 Moscow olm prel – Round 4 – Mcgowan, Daniel – 0-1 – Boutteville, Cesar – G133 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
1956 Moscow olm prel – Round 6 – Karaklajic, Nikola – 1-0 – Kramer, Hanspeter – G199 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. a4 Bg4 10. h3 Bh5
1956 URS Ch sf – Round ? – Goldberg, Grigory A – 1/2-1/2 – Neishtadt, Yakov – G106 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 b5 6. Bb3 Be7 7. c3 d6 8. O-O O-O 9. a4 b4 10. d4 exd4
1957 DDR Ch 08th – Round 9 – Kallas, Hans Joachim – 0-1 – Fuchs, Reinhart – G60 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 d6 8. c3 O-O 9. d3 Na5 10. Bc2 c5
1957 Wageningen zt – Round 9 – Olafsson, Fridrik – 1-0 – Kolarov, Atanas S. – G25 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. d3 Bb7 10. Nbd2 Nb8
1957 WchT U26 04th – Round 11.4 – Gipslis, Aivars – 1-0 – Yepez, Osvaldo – G147 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. a4 Bd7 10. d4 h6
1958 WchT U26 fin-A 05th – Round 5 – Mednis, Edmar J – 0-1 – Kozma, Julius – G55 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
1959 URS Team Ch – Round 1 – Khalilbeili, Sultan – 1-0 – Vistaneckis, Isakas – G82 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. Qe2 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
1960 Leningrad tt – Round 5 – Mednis, Edmar J – 1-0 – Mabbs, David J – G66 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1960 Poland Ch – Round 1 – Gromek, Jozef – 1/2-1/2 – Brzozka, Stefan – G4 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. a4 b4 10. d4 Bg4
1961 GBR Ch 48th – Round 10.2 – Hilton, Clifford George – 1/2-1/2 – Wade, Robert G – G78 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
1963 New York ch-USA – Round 4 – Mednis, Edmar J – 1/2-1/2 – Addison, Wiliam G – G22 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1964 BRA Ch – Round 13 – Gadia, Olicio – 0-1 – Farias, Sergio A. B. Lopes de – G48 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 b5 6. Bb3 Be7 7. c3 O-O 8. O-O d6 9. Na3 Na5 10. d4 Bg4
1964 Tel Aviv olm fin-A – Round 3 – Blatny, Frantisek – 1/2-1/2 – Radovici, Corvin – G61 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. a4 Bg4 10. h3 Bxf3
1965 HUN Ch 21th – Round 1 – Kovacs, Laszlo M – 1-0 – Filep, Tibor – G9 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. h3 Be6 10. Bxe6 fxe6
1965 Marianske Lazne – Round 3 – Bednarski, Jacek B – 1-0 – Kavalek, Lubomir – G18 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. a4 Bg4 10. h3 Na5
1965 Zinnowitz GER – Round 13 – Bednarski, Jacek B – 0-1 – Hennings, Artur – G26 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. a4 Bg4 10. h3 Bxf3
1966 FRA Ch Grenoble FRA – Round 4 – Vacca, Georges – 0-1 – Thiellement, Andre – G9 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 Re8
1966 La Habana olm fin-B – Round 6 – Bednarski, Jacek – 1-0 – Prameshuber, Alexander – G91 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. a4 Na5 10. Bc2 c6
1966 La Habana olm fin-C – Round 7 – Tatai, Stefano – 1-0 – Belkadi, Ridha – G47 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1966 Rubinstein Memorial 04th – Round 8 – Bednarski, Jacek – 1/2-1/2 – Lengyel, Laszlo – G46 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. a4 Na5 10. Bc2 Be6
1967 FRG Ch Kiel GER – Round 1 – Huebner, Robert – 1/2-1/2 – Haakert, Juergen – G6 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 d6 8. c3 O-O 9. d3 Nd7 10. Rd1 Na5
1967 Sochi – Round 10 – Shamkovich – 1/2-1/2 – Langeweg, Kick – G78 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 b5 6. Bb3 Be7 7. c3 d6 8. O-O O-O 9. h3 Be6 10. d3 Bxb3
1968 Hoogovens – Round 12 – Matanovic, Aleksandar – 1/2-1/2 – Langeweg, Kick – G106 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 Be7 6. O-O b5 7. Bb3 O-O 8. c3 d6 9. a4 Bb7 10. d3 Na5
1968 Olympiad Lugano SUI – Round 1 – Avgousti, Petrakis – 0-1 – Thiellement, Andre – G8 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nd7 10. d4 Bf6
1969 Moskou ch-URS – Round 1 – Kupreichik, Viktor D – 0-1 – Tukmakov, Vladimir B – G158 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 Be7 6. c3 b5 7. Bb3 O-O 8. O-O d6 9. h3 Na5 10. Bc2 c5
1969 New York ch-USA – Round 2 – Mednis, Edmar J – 1/2-1/2 – Reshevsky, Samuel – G9 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
1969 Sarajevo – Round 15 – Lutikov, Anatoly S – 0-1 – Cs. Kovacs, Laszlo – G100 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 d6 8. c3 O-O 9. Bc2 Re8 10. d3 Bf8
1970 Palma de Mallorca Interzonal – Round 13 – Huebner, Robert – 1/2-1/2 – Portisch, Lajos – G213 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O 8. c3 d6 9. a4 b4 10. d4 exd4

C86g — Worrall Attack

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Qe2 b5 7.Bb3 O-O 8.c3 d6

Eval: [+0.14]

Les coups candidats

9.Rd1 — 41.9% (1204 parties) →

Ambassadeurs : Tiviakov, Sergei (12x), Varshini, V (8x), Vidarsson, Jon G (7x), Estrada Nieto, Julian (7x), Cooper, Lawrence H (7x), Madl, Ildiko (7x), Bok, Benjamin (6x), Strikovic, Aleksa (6x)

9.d4 — 25.3% (727 parties) →

Ambassadeurs : Mathes, Werner (10x), Guliev, Logman (9x), Bagirov, Vladimir (7x), Chorfi, Khaled (7x), Dorawa, Bernhard (7x), Kaminski, Marcin (6x), Reti, Richard (5x), Short, Nigel D (5x)

9.h3 — 18.3% (527 parties)

Ambassadeurs : Marjanovic, Slavoljub (12x), Medveski, Mike (7x), Fogarasi, Tibor (6x), Farago, Sandor (6x), Mednis, Edmar J (4x), Yudasin, Leonid (4x), Vieito Soria, Luis María (4x), Wikman, Ragnar (3x)

9.a4 — 7.3% (209 parties)

Ambassadeurs : Da Silva Filho, Alcindo Luz Bastos (5x), Pacey, Kevin (5x), Paksa, Rudolf (5x), Bednarski, Jacek (4x), Lengyel, Bela (4x), Alekhine, Alexander (3x), Keres, Paul Petrovich (3x), Blatny, Frantisek (3x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	9.Rd1	9.d4	9.h3	9.a4
<1800	74	50%	23%	20%	—
1800-2200	947	45%	20%	21%	5%
2200-2600	1121	50%	25%	14%	6%
2600+	33	45%	45%	9%	—

Évolution par décennie (% des parties)

Décennie	N parties	9.Rd1	9.d4	9.h3	9.a4
1910s	5	—	100%	—	—
1920s	14	—	79%	14%	7%
1930s	13	—	38%	15%	38%
1940s	41	17%	41%	10%	20%
1950s	105	24%	23%	18%	25%
1960s	117	20%	40%	21%	15%
1970s	74	22%	28%	22%	22%
1980s	99	29%	20%	26%	16%
1990s	657	30%	36%	18%	7%
2000s	813	48%	23%	18%	5%
2010s	830	55%	18%	17%	3%
2020s	104	62%	10%	21%	3%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
9.Rd1	55%	62%	▲ +7.0%
9.d4	18%	10%	▼ -8.2%
9.h3	17%	21%	▲ +3.8%
9.a4	3%	3%	-0.5%

Joueurs célèbres

Champions du monde dans cette position

Alekhine, Alexander — 9 parties
Anand, Viswanathan — 5 parties
Karpov, Aleksandr — 4 parties
Carlsen, Magnus — 4 parties
Karpov, Anatoly — 2 parties
Hou, Yifan — 2 parties
Botvinnik, Mikhail — 1 partie
Euwe, Max — 1 partie

Parties historiques

9.Rd1 — 41.9% (1204 parties)

1941 — Keres, Paul vs Lilienthal, Andor — 1-0 — Leningrad- Moscow URS
1941 — Keres, Paul vs Lilienthal, Andor — 1-0 — Leningrad RUS
1942 — Alekhine, Alexander vs Keres, Paul Petrovich — 1-0 — It Salzburg AUT
1942 — Alekhine, Alexander vs Keres, Paul — 1-0 — Salzburg AUT
1942 — Alekhine, Alexander vs Keres, Paul — 1-0 — Salzburg AUT

9.d4 — 25.3% (727 parties)

1910 — Thoenes vs Barasz, Zsigmond — 1-0 — Hamburg GER
1911 — Anderlitzka, F. vs Barton, James — 1-0 — Plzen CZE
1912 — Freiman, Andy vs Salwe, Georg — 1-0 — RUS-ch Vilnius LTU
1919 — Reti, Richard vs Van Hoorn, Casper — 1-0 — Amsterdam VAS
1919 — Jaffe, Charles vs Chajes, Oscar — 1/2-1/2 — Troy

9.h3 — 18.3% (527 parties)

1928 — Weenink, Henri vs Stoltz, Gosta — 1/2-1/2 — The Hague NED
1928 — Nagy, Geza vs Jacobson, Ernst — 1/2-1/2 — The Hague NED
1931 — Yates, Frederic D vs Vajda, Arpad — 1-0 — Prague ol Prague CZE
1933 — Horowitz, Albert Israel vs Willmoth, Robert F — 1/2-1/2 — New York, NY USA
1946 — Vinken, Alex vs Alexander Ronald Cheng — 0-1 — Maastricht NED

9.a4 — 7.3% (209 parties)

1928 — Alekhine, Alexander vs Blass, Abram — 1-0 — Warsaw POL
1930 — O Hanlon John vs Baker Philip — 1-0 — ?
1930 — Alekhine, Alexander vs Monticelli, Mario — 1-0 — San Remo ITA
1937 — List, Paul vs Grob, Henry — 1-0 — Ostende
1937 — Becker, Albert vs Adam, Hermann — 1-0 — Vienna AUT

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