A34g — English: Symmetrical, 2…g6

1.c4 c5 2.Nc3 g6 3.Nf3 * ● Trait aux Noirs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Atouts. Les Blancs s'appuient sur les cases fortes b5 et d5 et la paire de fous.

Côté adverse. Les fous enfermés en c8 et f8 et le roi resté au centre.

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

Plans. O-O (Mettre le roi en sécurité, connecter les tours) ; e4 (Centre d4+e4, libère Bf1) ; d3 (Libérer Bc1) ; h3 (Empêcher ...Bg4).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Atouts. Les Noirs s'appuient sur 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, les fous c8 et f8 et les tours a8 et h8).

Plans. O-O (Mettre le roi en sécurité, connecter les tours) ; ...d6 (Libérer Bc8) ; ...Nc6 (Développer Nb8) ; ...Nf6 (Développer Ng8) ; ...Bd6 (Développer Bf8).

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	—	● f7→g6, h7→g6
Passés	—	—
Majorité	—	—

Cases

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

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bf1	● Bf1 Non développé (mob. 0)
Bc8		● Bc8 Non développé (mob. 0)
Bf8		● Bf8 Non développé (mob. 2)
Paire de fous	● Oui	● Oui
Non développées	4 (c1, f1, a1, h1)	6 (b8, g8, c8, 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	semi-ouvert
Ruptures	● d2-d3, ● e2-e3	● …d7-d6, ● …d7-d5, ● …e7-e6, ● …e7-e5, ● …f7-f6, ● …f7-f5

Partie
1961 Bled – Round 2 – Olafsson, Fridrik – 1/2-1/2 – Ivkov, Borislav – G24 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. e3 Nf6 5. d4 O-O 6. Be2 cxd4 7. Nxd4 d5 8. cxd5 Nxd5 9. O-O Nxc3 10. bxc3 a6
1962 Capablanca Memorial – Round 18 – Smyslov, Vladimir – 1/2-1/2 – Haag, Ervin – G186 1. Nf3 g6 2. c4 c5 3. Nc3 Bg7 4. g3 b6 5. Bg2 Bb7 6. b3 Nh6 7. Bb2 Nf5 8. e3 h5 9. O-O Nc6 10. Na4 Bxb2
1963 Asztalos Memorial 6th – Round 4 – Brzozka, Stefan – 0-1 – Flesch, Janos – G9 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. e3 Nf6 7. Nc2 O-O 8. Be2 d6 9. O-O Be6 10. Rb1 d5
1963 Leningrad ch-URS – Round 1 – Geller, Efim P – 1/2-1/2 – Novopashin, Arkady – G3 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. Nc2 f5 7. g3 b6 8. Bg2 Bb7 9. O-O Qc8 10. Be3 Ne5
1963 URS Team Ch – Round ? – Krogius, Nikolai V – 1/2-1/2 – Suetin, Alexey S – G25 1. c4 g6 2. Nc3 c5 3. Nf3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. e3 Nf6 7. Be2 O-O 8. O-O b6 9. b3 Bb7 10. Nc2 Na5
1964 Budapest ch-HUN – Round 1 – Flesch, Jean-benoit – 1/2-1/2 – Haag, Ervin – G160 1. Nf3 c5 2. c4 g6 3. Nc3 Bg7 4. a3 Nf6 5. g3 b6 6. e4 Nc6 7. Bg2 O-O 8. O-O d6 9. h3 Nd7 10. Rb1 Nde5
1964 IBM – Round 1 – Barcza, Gedeon – 1/2-1/2 – Pirc, Vasja – G12 1. Nf3 c5 2. c4 g6 3. Nc3 Bg7 4. e3 Nf6 5. d4 cxd4 6. exd4 d5 7. Be2 O-O 8. O-O Nc6 9. Bf4 dxc4 10. d5 Na5
1964 Pecs – Round 10 – Bobotsov, Milko G – 1-0 – Honfi, Karoly – G8 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. Nxc6 bxc6 7. e4 d6 8. Be2 Nf6 9. O-O O-O 10. Be3 Bb7
1964 Pecs – Round 12 – Kholmov, Ratmir D – 1/2-1/2 – Honfi, Karoly – G69 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. e3 Nf6 5. d4 O-O 6. Be2 cxd4 7. exd4 d5 8. O-O Nc6 9. h3 dxc4 10. Bxc4 Na5
1965 Budapest2 – Round 15 – Pirc, Vasja – 1/2-1/2 – Haag, Ervin – G57 1. Nf3 c5 2. c4 g6 3. Nc3 Bg7 4. e3 Nf6 5. d4 O-O 6. Be2 cxd4 7. exd4 d5 8. O-O Nc6 9. c5 Ne4 10. Bf4 Bg4
1965 Capablanca Memorial – Round 10 – Cobo Arteaga, Eldis – 1/2-1/2 – Wade, Robert G – G96 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. g3 Nh6 5. Bg2 Nf5 6. d3 Nc6 7. Bd2 b6 8. Rb1 Bb7 9. O-O Rb8 10. a3 Ncd4
1965 Hungary – Round 1 – Foldi, Jozsef – 1/2-1/2 – Liptay, Laszlo Dr. – G105 1. Nf3 c5 2. c4 g6 3. Nc3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. Nc2 Bxc3+ 7. bxc3 Qa5 8. Bd2 Nf6 9. f3 d6 10. e4 Be6
1965 Hungary – Round 1 – Navarovszky, Laszlo – 1/2-1/2 – Bilek, Istvan – G107 1. Nf3 c5 2. c4 g6 3. Nc3 Bg7 4. e3 Nf6 5. d4 O-O 6. Be2 cxd4 7. exd4 d5 8. c5 b6 9. O-O Ne4 10. cxb6 Nxc3
1966 La Habana olm fin-B – Round 13 – Ree, Hans – 1/2-1/2 – Glauser, Hansruediger – G185 1. c4 g6 2. Nc3 c5 3. Nf3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. Nc2 d6 7. e4 Nh6 8. Bd2 f5 9. Qc1 Nf7 10. Be2 O-O
1966 Tbilisi ch-URS – Round 11 – Kholmov, Ratmir D – 1/2-1/2 – Osnos, Viatcheslav – G94 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. e3 Nf6 5. d4 O-O 6. Qb3 Na6 7. Be2 d6 8. O-O Rb8 9. Bd2 Bf5 10. Nb5 Ne4
1966 Titovo Uzice – Round 1 – Udovcic, Mijo – 0-1 – Soos, Balint – G2 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. e3 Nf6 5. d4 O-O 6. Be2 cxd4 7. Nxd4 d5 8. O-O dxc4 9. Bxc4 a6 10. Qe2 b5
1966 Zinnowitz – Round 1 – Nei, Iivo – 1/2-1/2 – Malich, Burkhard, Dr. – G1 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. e3 Nf6 5. d4 O-O 6. Be2 cxd4 7. exd4 d5 8. O-O Nc6 9. Bf4 Bg4 10. Be3 dxc4
1967 Asztalos Memorial 10th – Round 6 – Barcza, Gedeon – 1-0 – Pietzsch, Wolfgang – G33 1. Nf3 c5 2. c4 g6 3. Nc3 Bg7 4. e3 Nf6 5. d4 O-O 6. Be2 cxd4 7. exd4 d5 8. O-O Nc6 9. Be3 dxc4 10. Bxc4 Bg4
1967 Clare Benedict Cup 14th – Round 1.2 – Darga, Klaus – 1-0 – Glauser, Hansruediger – G1 1. c4 g6 2. Nc3 c5 3. Nf3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. Nb3 d6 7. e4 Nh6 8. Be2 f5 9. O-O O-O 10. c5 Nf7
1967 Hastings6768 – Round 7 – Stein, Leon Rico – 1-0 – Hartston, William R – G31 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. Nc2 d6 7. Bd2 Nf6 8. e4 O-O 9. Be2 a6 10. O-O Rb8
1967 October Revolution 50 – Round 1 – Barcza, Gedeon – 1/2-1/2 – Suetin, Alexey S – G68 1. Nf3 c5 2. c4 g6 3. Nc3 Bg7 4. e3 Nf6 5. Be2 O-O 6. O-O d5 7. d4 cxd4 8. exd4 Nc6 9. Be3 dxc4 10. Bxc4 Na5
1967 October Revolution 50 – Round 1 – Barcza, Gedeon – 1/2-1/2 – Taimanov, Mark E – G69 1. Nf3 c5 2. c4 g6 3. Nc3 Bg7 4. e3 Nh6 5. b3 O-O 6. Bb2 Nc6 7. Be2 d6 8. O-O e5 9. Ne1 f5 10. d3 Be6
1967 Rubinstein Memorial – Round 9 – Flohr, Salo – 1-0 – Schmidt, Waldemar – G37 1. Nf3 c5 2. c4 g6 3. Nc3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. Nc2 f5 7. e3 b6 8. Be2 Bb7 9. O-O Rc8 10. Qd2 Nf6
1967 Sousse Interzonal – Round 16 – Stein, Leon Rico – 1/2-1/2 – Matulovic, Milan – G143 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. Nc2 Bxc3+ 7. bxc3 Nf6 8. f3 Qa5 9. Bd2 d5 10. cxd5 Qxd5
1967 URS Team Ch – Round 1 – Uusi, Gunnar – 1-0 – Shahtahtinsky, Alekper – G6 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. Nc2 d6 7. Bd2 Nf6 8. e4 O-O 9. Be2 a6 10. O-O Bd7
1968 Bamberg – Round 3 – Ivkov, Borislav – 1/2-1/2 – Bobotsov, Milko G – G29 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. Nb3 d6 7. e4 Nf6 8. Be2 O-O 9. Be3 Be6 10. f3 Nd7
1968 Hastings6869 – Round 9 – Huebner, Robert – 1/2-1/2 – Smejkal, Jakub – G50 1. Nf3 g6 2. c4 c5 3. Nc3 Bg7 4. e3 Nf6 5. d4 cxd4 6. Nxd4 Nc6 7. Be2 O-O 8. O-O Nxd4 9. exd4 d5 10. Re1 dxc4
1968 Imperia Open – Round 1 – Baumgartner Mari, Pau – 0-1 – Forintos, Gyozo V – G9 1. Nf3 c5 2. c4 g6 3. Nc3 Bg7 4. e3 Nf6 5. d4 cxd4 6. exd4 O-O 7. Be2 d5 8. O-O Nc6 9. h3 Be6 10. c5 Ne4
1968 Lugano olm - Round 1 - Hort, Vlastimil - 1/2-1/2 - Kostro, Jerzy - G8 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. e3 Nf6 5. d4 O-O 6. Be2 cxd4 7. Nxd4 Nc6 8. O-O d5 9. cxd5 Nxd5 10. Nxc6 bxc6
1968 POL Ch 25th – Round 3 – Jamroz, Zbigniew – 1/2-1/2 – Schmidt, Wlodzimierz – G17 1. Nf3 c5 2. c4 g6 3. Nc3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. e3 Nf6 7. Be2 O-O 8. O-O Nxd4 9. exd4 d5 10. Bf4 Be6
1968 URS Team Ch – Round ? – Kholmov, Ratmir D – 1-0 – Hermlin, Aarne – G19 1. Nf3 c5 2. c4 g6 3. Nc3 Bg7 4. b3 Nc6 5. Bb2 e6 6. Qc1 Nf6 7. e3 O-O 8. Be2 d5 9. cxd5 exd5 10. Na4 b6
1968 URS Team Ch – Round 1 – Mikenas, Vladas – 1/2-1/2 – Hermlin, Aarne – G3 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. e3 Nf6 5. d4 O-O 6. d5 d6 7. Be2 e6 8. O-O exd5 9. cxd5 Re8 10. Nd2 Na6
1969 IBM – Round 12 – Darga, Klaus – 1/2-1/2 – Damjanovic, Marko – G44 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. Nb3 Nf6 7. e4 O-O 8. Be2 d6 9. Be3 Nd7 10. O-O b6
1969 IBM I – Round 7 – Stein, Leon Rico – 1/2-1/2 – Kavalek, Lubomir – G26 1. c4 g6 2. Nc3 c5 3. Nf3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. Nc2 d6 7. e4 Nh6 8. Be2 f5 9. Bd2 O-O 10. Qc1 Nf7
1969 IBM-B – Round 2 – Johannessen, Simon T – 1-0 – Ujtelky, Maximilian – G12 1. c4 g6 2. Nc3 c5 3. Nf3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. Nc2 b6 7. Bd2 Bb7 8. e4 Rc8 9. Be2 Nf6 10. b3 d6
1969 It – Round 9 – Zinn, Lothar – 0-1 – Espig, Lutz – G7 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. Nc2 d6 7. e4 Nh6 8. Be2 f5 9. h4 O-O 10. h5 f4
1969 Tallinn – Round 8 – Keres, Paul Petrovich – 1/2-1/2 – Damjanovic, Mato – G12 1. Nf3 c5 2. c4 g6 3. Nc3 Bg7 4. e3 Nf6 5. d4 O-O 6. Be2 cxd4 7. exd4 d5 8. O-O Nc6 9. Bf4 Be6 10. c5 Ne4
1969 Tallinn it – Round 6 – Etruk, Rein T – 1/2-1/2 – Gipslis, Aivars – G24 1. Nf3 c5 2. c4 g6 3. Nc3 Bg7 4. e3 Nf6 5. d4 O-O 6. Be2 cxd4 7. Nxd4 d5 8. cxd5 Nxd5 9. Nxd5 Qxd5 10. Bf3 Qc4
1969 Vilnius – Round 1 – Kupka, Slavoj – 0-1 – Kapengut, Albert – G1 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. e3 Nf6 5. d4 O-O 6. Be2 cxd4 7. Nxd4 d5 8. cxd5 Nxd5 9. Nxd5 Qxd5 10. Bf3 Qd6
1969 Zagreb – Round 10 – Lombardy, William J – 1/2-1/2 – Damjanovic, Marko – G68 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. e3 Nf6 5. a3 O-O 6. Be2 Nc6 7. O-O d5 8. cxd5 Nxd5 9. Qc2 b6 10. d3 Bb7
1970 Palma de Mallorca Interzonal – Round 8 – Naranja, Renato – 1/2-1/2 – Fischer, Robert James Jamesames – G8 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. e3 Nf6 7. Be2 O-O 8. O-O Nxd4 9. Qxd4 d6 10. Qh4 Be6
1972 Skopje ol (Men) fin-A – Round 12 – Bisguier, Arthur B – 0-1 – Karpov, Anatoly – G22 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. e3 Nf6 5. d4 O-O 6. Be2 cxd4 7. exd4 d5 8. O-O Nc6 9. h3 Bf5 10. Be3 dxc4
41. Olympiad Open 2014 – Round 2.35 – Gonzalez Zamora, Juan Carlos – 0-1 – Granda Zuniga, Julio E – G144 1. Nf3 c5 2. c4 g6 3. Nc3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. e3 Nh6 7. Nc2 Bxc3+ 8. bxc3 Qa5 9. Bd2 Nf5 10. h4 h5
Interpolis 1981 – Round 10 – Andersson, Ulf 1949 – 1/2-1/2 – Ljubojevic, Ljubomir – G51 1. Nf3 c5 2. c4 g6 3. Nc3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. e3 Nh6 7. Bd3 d6 8. O-O O-O 9. Bd2 Bg4 10. Be2 Bd7
SportAccord Basque Men 2013 – Round 5.2 – Giri, Anish – 0-1 – Vachier-Lagrave, Maxime – G72 1. c4 g6 2. Nc3 c5 3. Nf3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. Nc2 Bxc3+ 7. bxc3 Nf6 8. g3 d6 9. Bg2 Be6 10. O-O O-O
Supreme Masters 2013 – Round 9.4 – Wang, Hao(ZJWZ) – 1-0 – Anand, Viswanathan – G44 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. e3 Nf6 7. Be2 d5 8. cxd5 Nxd5 9. Nxc6 bxc6 10. Na4 O-O
World Blitz 2021 – Round 8.55 – Anton Guijarro, David – 0-1 – Vakhidov, Jakhongir – G486 1. Nf3 c5 2. c4 g6 3. Nc3 Bg7 4. e3 Nf6 5. d4 cxd4 6. exd4 d5 7. Qb3 dxc4 8. Bxc4 O-O 9. O-O Nc6 10. Ne5 e6
World Blitz 2022 – Round 8.48 – Anton Guijarro, David – 1/2-1/2 – Vakhidov, Jakhongir – G430 1. Nf3 c5 2. c4 g6 3. Nc3 Bg7 4. e3 Nf6 5. d4 cxd4 6. exd4 d5 7. Qb3 dxc4 8. Bxc4 O-O 9. O-O Nc6 10. Ne5 e6

A34g — Symmetrical

1.c4 c5 2.Nc3 g6 3.Nf3

Eval: [+0.25]

Les coups candidats

3…Bg7 — 92.0% (3576 parties)

Ambassadeurs : Jurek, Josef (15x), Cafferty, Bernard (11x), Cebalo, Miso (10x), Malich, Burkhard, Dr. (9x), Konopka, Michal (8x), Bobotsov, Milko G (7x), Silman, Jeremy (7x), Espig, Lutz (7x)

3…Nc6 — 6.4% (250 parties) →

Ambassadeurs : Hoffmann, Hans (2x), Janetschek, Karl (2x), Semenenko, Dmitriy (2x), Mordido, Kylen Joy (2x), Schunk, Thomas (2x), Mueller, Werner (2x), Chu, Ruotong (2x), Kmoch, Hans (1x)

3…Nf6 — 1.4% (53 parties) →

Ambassadeurs : Bradac, Roman (2x), Lengyel, Laszlo (1x), Geller, Efim P. (1x), de Wall, Robert (1x), Rub, Leonardo (1x), Oehlenschlaeger, Eckart (1x), Kling, Karl-Adolf (1x), Jung, Hans, Dr. (1x)

3…b6 — 0.1% (3 parties)

Ambassadeurs : Fricker, Jean (1x), Laco, Giuseppe (1x), Srdjanov, Stevan (1x), Blanusa, Ranko (1x), Kotyza, Bohumil (1x), Stanczyk, Lech (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	3…Bg7	3…Nc6	3…Nf6	3…b6
<1800	107	85%	11%	4%	—
1800-2200	1251	88%	10%	1%	0%
2200-2600	1834	96%	3%	1%	—
2600+	46	98%	2%	—	—

Évolution par décennie (% des parties)

Décennie	N parties	3…Bg7	3…Nc6	3…Nf6	3…b6
1920s	3	67%	33%	—	—
1930s	3	100%	—	—	—
1940s	1	—	100%	—	—
1950s	11	100%	—	—	—
1960s	116	95%	3%	1%	1%
1970s	210	95%	5%	0%	—
1980s	218	94%	4%	1%	—
1990s	642	94%	4%	1%	—
2000s	972	92%	6%	2%	0%
2010s	1383	90%	8%	1%	—
2020s	327	92%	7%	2%	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
3…Bg7	90%	92%	▲ +1.3%
3…Nc6	8%	7%	▼ -1.7%
3…Nf6	1%	2%	+0.4%
3…b6	0%	0%	+0.0%

Joueurs célèbres

Champions du monde dans cette position

Botvinnik, Mikhail — 3 parties
Smyslov, Vladimir — 3 parties
Carlsen, Magnus — 3 parties
Karpov, Aleksandr — 2 parties
Tal, Mikhail — 2 parties
Hou, Yifan — 2 parties
Anand, Viswanathan — 1 partie
Gukesh D — 1 partie

Parties historiques

3…Bg7 — 92.0% (3576 parties)

1921 — Zimpel L vs Krejcik, Josef — 0-1 — Vienna AUT
1927 — Chodera, Miroslav vs Opocensky, Karel — 1-0 — Praag ch
1932 — Gaigneron de Marolles, Alain vs Raizman, Maurice — 0-1 — La Baule
1934 — Pinsl vs Bogoljubow, Efim — 0-1 — Bayreuth
1939 — Thomas Andrew vs Abrahams, Gerald — 1-0 — Bournemouth

3…Nc6 — 6.4% (250 parties)

1926 — Kmoch, Hans vs Vajda, Albert — 1/2-1/2 — Semmering AUT
1947 — Herseth, Storm vs Stoltz, Gösta — 1-0 — Aalborg DEN
1966 — Varnusz, Egon vs Szilagyi, Gyorgy Laszlo — 1-0 — Budapest HUN
1967 — Kupka, Slavoj vs Smejkal, Jan — 0-1 — Bratislava SVK
1968 — Cafferty, Bernard vs Reuben, Stewart — 1/2-1/2 — Twickenham

3…Nf6 — 1.4% (53 parties)

1965 — Lengyel, Laszlo vs Geller, Efim P. — 0-1 — Beverwijk NED
1976 — Jung, Hans, Dr. vs Jackson, David — 1-0 — London CAN
1984 — Southam, Todd vs Kuznecov, Alex — 0-1 — Canada ch jr
1986 — Oehlenschlaeger, Eckart vs Kling, Karl-Adolf — 1-0 — corr BdF
1989 — de Wall, Robert vs Rub, Leonardo — 1-0 — Palo Alto

3…b6 — 0.1% (3 parties)

1964 — Fricker, Jean vs Laco, Giuseppe — 0-1 — Genova ITA
2001 — Srdjanov, Stevan vs Blanusa, Ranko — 1-0 — Palanka YUG
2003 — Kotyza, Bohumil vs Stanczyk, Lech — 0-1 — Nachod

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