A34s — English: Symmetrical, 3 Knights, 5.g3

1.c4 c5 2.Nc3 Nf6 3.Nf3 d5 4.cxd5 Nxd5 5.g3 * ● Trait aux Noirs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

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Atouts. Les Blancs s'appuient sur une majorité de pions à l'centre (2 contre 1), la paire de fous et la colonne semi-ouverte c.

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) ; Tour sur colonne c.

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

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Atouts. Les Noirs s'appuient sur une majorité de pions à l'aile_dame (3 contre 2), la case forte b4, la paire de fous et la colonne semi-ouverte d.

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 (le cavalier b8, les fous c8 et f8 et les tours a8 et h8).

Plans. O-O (Mettre le roi en sécurité, connecter les tours) ; ...Nbd7 (Développer Nb8) ; ...Bg4 (Développer Bc8, clouer Nf3) ; ...Bd6 (Développer Bf8) ; ...c4 (Rupture).

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→g3, h2→g3	—
Passés	—	—
Majorité	● centre 2v1	● aile_dame 3v2

Cases

	♔ Blancs	♚ Noirs
Cases fortes	—	● b4 (2v0)
Cases faibles	—	—
Centre	● e4 (1v0), ● e5 (1v0)	—

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● c	● d

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bf1	● Bf1 Non développé (mob. 2)
Bc8		● Bc8 Non développé (mob. 5)
Bf8		● Bf8 Non développé (mob. 0)
Paire de fous	● Oui	● Oui
Non développées	4 (c1, f1, a1, h1)	5 (b8, 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	● …c5-c4, ● …e7-e6, ● …e7-e5, ● …f7-f6, ● …f7-f5

Partie
? 1986 – Round ? – Sokolov, Andrei – 1/2-1/2 – Miles, Anthony J – G1 1. c4 Nf6 2. Nc3 c5 3. Nf3 d5 4. cxd5 Nxd5 5. g3 g6 6. Bg2 Bg7 7. O-O O-O 8. Ng5 e6 9. Nge4 b6 10. d3 Bb7
1925 Baden-Baden – Round 1 – Reti, Richard – 1/2-1/2 – Rubinstein, Akiba – G119 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. g3 g6 6. Bg2 Bg7 7. O-O Nc6 8. Qb3 Nxc3 9. dxc3 O-O 10. Rd1 Qc7
1925 Moscow – Round 1 – Zubarev, Nikolay – 0-1 – Rubinstein, Akiba – G139 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. g3 g6 6. Bg2 Bg7 7. Qb3 Nc7 8. Ng5 O-O 9. d3 Nc6 10. Be3 Nd4
1926 Bardejov – Round 13 – Kostic, Boris – 1/2-1/2 – Kmoch, Hans – G64 1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nxc3 6. bxc3 g6 7. Bg2 Bg7 8. O-O O-O 9. a4 Qc7 10. Ba3 Rd8
1926 Bardejov – Round 13 – Sterk, Karoly – 1-0 – Walter, Max – G63 1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nxc3 6. bxc3 g6 7. Bg2 Bg7 8. O-O O-O 9. a4 Nc6 10. Ba3 c4 1-0
1926 Spa – Round 4 – Davidson, Jacques – 0-1 – Soultanbeieff, Victor – G7 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nc6 6. Bg2 Nxc3 7. bxc3 e5 8. O-O Be7 9. d3 O-O 10. Rb1 Qc7
1927 London Olympiad 1st – Round 1.31 – Rasmusson Birger – 1/2-1/2 – Gruenfeld, Ernst – G3 1. c4 Nf6 2. Nc3 c5 3. Nf3 d5 4. cxd5 Nxd5 5. g3 g6 6. Bg2 Bg7 7. O-O O-O 8. Qb3 Nb6 9. d3 Nc6 10. Ne4 c4
1928 Trencianske Teplice – Round 1 – Kostic, Boris – 1/2-1/2 – Spielmann, Rudolf – G1 1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nxc3 6. bxc3 g6 7. Bg2 Bg7 8. O-O O-O 9. a4 Nc6 10. Ba3 c4
1930 Hamburg ol (Men) – Round 2.4 – Carls, Carl – 1/2-1/2 – Rejfir, Josef – G2 1. c4 Nf6 2. Nc3 c5 3. Nf3 d5 4. cxd5 Nxd5 5. g3 g6 6. Bg2 Bg7 7. O-O O-O 8. Nxd5 Qxd5 9. d3 Nc6 10. Ng5 Qd7
1931 Praag predolympijsky – Round ? – Berger Chepurniak, Violetta – 1/2-1/2 – Stoltz, Gosta – G2 1. c4 c5 2. Nc3 Nf6 3. Nf3 d5 4. cxd5 Nxd5 5. g3 Nc6 6. Bg2 Nb6 7. O-O e5 8. d3 Be7 9. Bd2 O-O 10. Rc1 f5
1932 Nt Hamburg-Altona GER – Round 9 – Heinicke, Herbert – 0-1 – Engert, Immo – G24 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nc6 6. Bg2 Nxc3 7. bxc3 g6 8. O-O Bg7 9. Qb3 Qc7 10. Rb1 O-O
1933 Folkestone Olympiad V – Round 4.13 – Mikenas, Vladas – 1-0 – Soultanbeieff, Victor – G12 1. c4 c5 2. Nc3 Nf6 3. Nf3 d5 4. cxd5 Nxd5 5. g3 Nc6 6. Bg2 Nxc3 7. bxc3 e5 8. O-O Be7 9. d3 O-O 10. Be3 Qa5
1933 Folkestone Olympiad V – Round 8.23 – Regedzinski, Teodor – 1-0 – Glass, Eduard – G24 1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nc6 6. Bg2 Nb6 7. O-O e5 8. b3 Bf5 9. Bb2 Be7 10. d3 Rc8
1933 GER Ch 1st – Round 1 – Roedl, Ludwig – 0-1 – Von Holzhausen, Walther – G1 1. c4 Nf6 2. Nf3 c5 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nc6 6. Bg2 Nxc3 7. bxc3 g6 8. d3 Bg7 9. Bd2 Bd7 10. Qc1 h6
1935 BCF Ch 28th – Round 2 – Golombek, Harry – 1-0 – Cross, Rupert – G4 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3 c5 5. g3 g6 6. Bg2 Nxc3 7. bxc3 Bg7 8. O-O O-O 9. Qb3 Nc6 10. Ba3 Qa5
1937 Bad Elster – Round 5 – Polzer, Hans – 0-1 – Rellstab, Ludwig – G3 1. c4 c5 2. Nc3 Nf6 3. Nf3 d5 4. cxd5 Nxd5 5. g3 Nc6 6. d3 Nb6 7. Bg2 e5 8. O-O Be7 9. b3 Be6 10. Bb2 f6
1937 Bad Elster – Round 7 – Polzer, Hans – 1-0 – Bluemich, Max – G23 1. Nf3 c5 2. c4 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nc6 6. d3 e5 7. Bg2 Nc7 8. O-O f6 9. Be3 Be6 10. Rc1 Qd7
1944 Olomouc Olomouc CZE – Round 2 – Hlavacek, Jiri – 0-1 – Zita, Frantisek – G2 1. c4 Nf6 2. Nc3 c5 3. Nf3 d5 4. cxd5 Nxd5 5. g3 Nc6 6. Bg2 Nxc3 7. bxc3 e5 8. d3 Be7 9. O-O O-O 10. Bb2 Bg4
1947 BRA Ch – Round 5 – Ribeiro Sabino – 0-1 – De Freitas, Marcio Elisio – G8 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. g3 g6 6. Bg2 Bg7 7. Qb3 Nb4 8. a3 N4c6 9. d3 O-O 10. Be3 Nd4
1947 Nt Lueneburg GER – Round 12 – Saemisch, Friedrich – 0-1 – Rankis, August – G30 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nc6 6. Bg2 Nb6 7. O-O e5 8. d3 f6 9. b3 Be6 10. Bb2 Rc8
1947 Sofia Balkaniade – Round 1.1 – Ichim, Trajan – 1-0 – Trifunovic, Petar – G1 1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nxc3 6. bxc3 g6 7. Bg2 Bg7 8. d4 Nc6 9. e3 Qa5 10. Bd2 O-O
1953 Candidats Tournament – Round 24 – Petrosian, Tigran A. – 1-0 – Szabo, Ladislav – G156 1. c4 Nf6 2. Nc3 c5 3. Nf3 d5 4. cxd5 Nxd5 5. g3 Nxc3 6. bxc3 g6 7. Qa4+ Nd7 8. h4 h6 9. Rb1 Bg7 10. Bg2 O-O
1955 Long Beach US-open – Round 12 – Turner, Abe J – 1-0 – Sandrin, Albert – G71 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. g3 g6 6. Bg2 Bg7 7. O-O O-O 8. Ne1 Nxc3 9. bxc3 Qc7 10. Nc2 Rd8
1955 Prague tm – Round 2 – Rejfir, Josef – 1/2-1/2 – Florian, Tibor – G7 1. c4 Nf6 2. Nc3 c5 3. Nf3 d5 4. cxd5 Nxd5 5. g3 Nxc3 6. bxc3 g6 7. Bg2 Bg7 8. O-O O-O 9. d4 Nc6 10. Be3 cxd4
1956 Montevideo – Round 1 – Eliskases, Erich – 1-0 – Fernandez Zubieta, Cristian Benjamin – G47 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. g3 e6 6. Bg2 Be7 7. O-O O-O 8. d4 cxd4 9. Nxd5 Qxd5 10. Nxd4 Qd7
1963 New York ch-USA – Round 3 – Addison, Wiliam G – 1/2-1/2 – Benko, Pal – G14 1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nxc3 6. bxc3 g6 7. Bg2 Bg7 8. O-O O-O 9. Qa4 Bd7 10. Qh4 Bc6
1963 POL Ch 20th – Round 8 – Doda, Zbigniew – 1/2-1/2 – Plater, Kazimierz – G46 1. c4 c5 2. Nc3 Nf6 3. Nf3 d5 4. cxd5 Nxd5 5. g3 Nc6 6. Bg2 e6 7. O-O Nc7 8. d3 Be7 9. Be3 O-O 10. d4 cxd4
1965 Wch U20 f-A – Round 3 – Huebner, Robert – 1-0 – Simon Emilio – G6 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nxc3 6. bxc3 g6 7. Bg2 Bg7 8. Qa4+ Nd7 9. Rb1 O-O 10. O-O Nb6
1968 USSR – Round 1 – Polugaevsky, Lev – 1/2-1/2 – Taimanov, Mark E – G2 1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. g3 g6 6. Bg2 Bg7 7. O-O O-O 8. Qb3 Nc7 9. Qc4 Ne6 10. d3 Nc6
1969 Venice – Round 1 – Lengyel, Levente – 1/2-1/2 – Unzicker, Wolfgang – G13 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. g3 g6 6. Bg2 Bg7 7. Qa4+ Nc6 8. Qc4 Nxc3 9. bxc3 Qa5 10. a4 O-O
1971 Moscow – Round 1 – Olafsson, Fridrik – 1-0 – Lengyel, Laszlo – G223 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. g3 g6 6. Bg2 Bg7 7. Qb3 Nb4 8. a3 N4c6 9. d3 O-O 10. O-O Nd4
1971 Moscow – Round 1 – Uhlmann, Wolfgang – 1/2-1/2 – Karpov, Anatoly – G13 1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. g3 g6 6. d3 Bg7 7. Bd2 b6 8. Qa4+ Bd7 9. Qh4 e6 10. Qxd8+ Kxd8
Bugojno 1978 – Round 6 – Miles, Anthony J – 0-1 – Hort, Vlastimil – G37 1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nc6 6. Bg2 g6 7. d4 Bg7 8. O-O Nxc3 9. bxc3 O-O 10. a4 Be6
Corus 2000 – Round 2 – Lputian, Smbat – 0-1 – Timman, Jan H – G13 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nc6 6. Bg2 g6 7. Qa4 Bg7 8. Ng5 e6 9. Nge4 Nb6 10. Qb5 O-O
Corus A 2010 – Round 11 – Nakamura, Hikaru – 1/2-1/2 – Leko, Peter – G68 1. c4 c5 2. Nf3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Nc3 Nc6 6. Bg2 g6 7. O-O Bg7 8. Nxd5 Qxd5 9. d3 O-O 10. Be3 Bxb2
FIDE Grand Swiss 2025 – Round 2 – Martirosyan Haik M. – 0-1 – Erigaisi Arjun – G68 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nbd7 7. Nc3 e5 8. h3 Re8 9. e4 exd4 10. Nxd4 Nc5
Interpolis 1986 – Round 7 – Korchnoi, Viktor – 1-0 – Miles, Anthony J – G22 1. Nf3 c5 2. c4 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. g3 g6 6. Qb3 Nb4 7. Ne4 Bg7 8. Nxc5 Qa5 9. Qc4 Bf5 10. e4 Bg4
Interpolis 1993 – Round 3 – Agdestein, Simen – 1-0 – Ivanchuk, Vasyl – G115 1. c4 Nf6 2. Nf3 c5 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nxc3 6. bxc3 b6 7. Bg2 Bb7 8. c4 e5 9. Bb2 Bd6 10. O-O Qc7
Las Palmas 1977 – Round 13 – Tatai, Stefano – 0-1 – Karpov, Anatoly – G24 1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. g3 g6 6. Bg2 Bg7 7. Qa4+ Nc6 8. Ng5 e6 9. Nge4 Nb6 10. Qb5 c4
Leningrad ch-URS 1977 – Round 1 – Tal, Mikhail – 1/2-1/2 – Alburt, Lev – G36 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nc6 6. Bg2 g6 7. O-O Bg7 8. Nxd5 Qxd5 9. d3 O-O 10. Be3 Bd7
Linares 1983 – Round 1 – Geller, Efim P – 1/2-1/2 – Karpov, Anatoly – G1 1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. g3 g6 6. Bg2 Bg7 7. O-O O-O 8. Nxd5 Qxd5 9. d3 Nc6 10. Be3 Bd7
Lone Pine Open 1978 – Round 8 – Portisch, Lajos – 1-0 – Olafsson, Fridrik – G30 1. Nf3 c5 2. c4 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. g3 g6 6. Bg2 Bg7 7. O-O O-O 8. Nxd5 Qxd5 9. d3 Nc6 10. a3 b6
SportAccord Blitz 2014 – Round 29.8 – Leko, Peter – 1-0 – Gelfand, Boris – G230 1. Nf3 c5 2. c4 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nc6 6. Bg2 g6 7. O-O Bg7 8. Qa4 e6 9. d3 O-O 10. Bd2 Nb6
Tilburg NED 1980 – Round ? – Ribli, Zoltan – 1/2-1/2 – Timman, Jan H – G1 1. c4 c5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. Nxd5 Qxd5 7. Bg2 g6 8. O-O Bg7 9. d3 O-O 10. Be3 Bd7
World Cup 1988 – Round 1 – Andersson, Ulf 1949 – 1/2-1/2 – Sax, Gyula – G101 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nc6 6. Nxd5 Qxd5 7. Bg2 e5 8. d3 Bg4 9. Be3 Rc8 10. a3 Qd7
World Rapid 2019 – Round 12.14 – Grachev, Boris – 1/2-1/2 – Salem, A.R. Saleh – G757 1. Nf3 c5 2. c4 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nc6 6. Bg2 g6 7. d3 Bg7 8. Bd2 O-O 9. Qc1 Bg4 10. h3 Bxf3

A34s — Symmetrical 3 Knights

1.c4 c5 2.Nc3 Nf6 3.Nf3 d5 4.cxd5 Nxd5 5.g3

Eval: [+0.10]

Les coups candidats

5…Nc6 — 77.6% (2532 parties)

Ambassadeurs : Uhlmann, Wolfgang (15x), Adamski, Jan (14x), Korchnoi, Viktor (12x), Espig, Lutz (12x), Robatsch, Karl (11x), Tukmakov, Vladimir B (11x), Gheorghiu, Florin (10x), Sarosy, Zoltan L (10x)

5…g6 — 13.4% (436 parties)

Ambassadeurs : Miles, Anthony J (8x), Polugaevsky, Lev (6x), Huebner, Robert (6x), Smejkal, Jan (5x), Karpov, Anatoly (4x), Geller, Efim P. (3x), Karpov, Aleksandr (3x), Suba, Mihai (3x)

5…Nc7 — 4.4% (142 parties)

Ambassadeurs : Bulgarini Torre, Marco (3x), Witkowski, Stefan (2x), Fuhrmann, Andreas, Dr. (2x), Pavlovic, Milos (2x), Mardell, Jimmy (2x), Siewert, Wolfgang (2x), Durmaz, Ayca Fatma (2x), Van Riemsdijk, Dirk D. (2x)

5…Nxc3 — 2.1% (67 parties)

Ambassadeurs : Kostic, Boris (2x), Szabo, Ladislav (2x), Sterk, Karoly (1x), Walter, Max (1x), Spielmann, Rudolf (1x), Kmoch, Hans (1x), Ichim, Trajan (1x), Trifunovic, Petar (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	5…Nc6	5…g6	5…Nc7	5…Nxc3
<1800	56	70%	4%	18%	2%
1800-2200	968	78%	12%	5%	2%
2200-2600	1504	80%	13%	3%	1%
2600+	126	81%	18%	—	1%

Évolution par décennie (% des parties)

Décennie	N parties	5…Nc6	5…g6	5…Nc7	5…Nxc3
1920s	14	43%	36%	—	21%
1930s	22	82%	18%	—	—
1940s	13	69%	8%	—	15%
1950s	41	78%	10%	2%	7%
1960s	36	69%	11%	6%	11%
1970s	269	69%	27%	1%	1%
1980s	306	72%	18%	4%	3%
1990s	565	78%	13%	4%	1%
2000s	796	79%	11%	5%	2%
2010s	1003	80%	11%	5%	2%
2020s	196	84%	8%	6%	2%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
5…Nc6	80%	84%	▲ +3.4%
5…g6	11%	8%	▼ -3.5%
5…Nc7	5%	6%	▲ +0.5%
5…Nxc3	2%	2%	-0.1%

Joueurs célèbres

Champions du monde dans cette position

Tal, Mikhail — 7 parties
Karpov, Anatoly — 4 parties
Karpov, Aleksandr — 4 parties
Kramnik, Vladimir — 3 parties
Smyslov, Vladimir — 2 parties
Kasparov, Garry — 2 parties
Alekhine, Alexander — 1 partie
Anand, Viswanathan — 1 partie
Botvinnik, Mikhail — 1 partie
Ding, Liren — 1 partie

Parties historiques

5…Nc6 — 77.6% (2532 parties)

1924 — Bogoljubow, Efim vs Romanovsky, Pjotr — 1/2-1/2 — Leningrad RUS
1926 — Reti, Richard vs Takacs, Sandor — 1-0 — Budapest HUN
1926 — Davidson, Jacques vs Soultanbeieff, Victor — 0-1 — ESP
1928 — Pleci, Isaias vs Maderna, Carlos — 1-0 — Buenos Aires ARG
1929 — Bluemich, Max vs Richter, Kurt P — 0-1 — Duisburg

5…g6 — 13.4% (436 parties)

1925 — Reti, Richard vs Rubinstein, Akiba — 1/2-1/2 — Baden-Baden GER
1925 — Zubarev, Nikolay vs Rubinstein, Akiba — 0-1 — Moscow RUS
1926 — Kostic, Boris vs Prokes, Ladislav — 1-0 — Bartfeld
1927 — Rasmusson Birger vs Gruenfeld, Ernst — 1/2-1/2 — London ENG
1928 — Johner, Paul vs Alekhine, Alexander — 0-1 — Switzerland

5…Nc7 — 4.4% (142 parties)

1957 — Zalys, Ignas vs Engel, Jan — 0-1 — Montreal ch
1965 — Faibisovich, Vadim Z vs Rodkin, Felix — 1-0 — Leningrad RUS
1966 — Zoltek, Tadeusz vs Witkowski, Stefan — 0-1 — Rzeszow ch POL
1974 — Kaufman, Lawrence vs Whittemore, R. — 1-0 — Las Vegas, NV USA
1976 — Vukic, Milan vs Witkowski, Stefan — 1-0 — Vukovar

5…Nxc3 — 2.1% (67 parties)

1926 — Sterk, Karoly vs Walter, Max — 1-0 — Bardejov
1926 — Kostic, Boris vs Kmoch, Hans — 1/2-1/2 — Bardejov
1928 — Kostic, Boris vs Spielmann, Rudolf — 1/2-1/2 — Trencianske Teplice SVK
1947 — Ichim, Trajan vs Trifunovic, Petar — 1-0 — Sofia Balkaniade
1947 — Perez Perez, Francisco Jose vs Fuentes Gonzalez, Juan Manuel — 1-0 — Aviles ESP

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