Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	—	—
Passés	—	—
Majorité	—	● aile dame 3v2

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● b5 (2v0), ● d5 (3v2)	● d3 (2v1), ● d4 (2v1)
Cases faibles	—	—
Centre	● d5 (3v2), ● e4 (1v0), ● e5 (1v0)	● d4 (2v1)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● c	● d

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bc4	● Bc4 Actif (mob. 9)
Bc8		● Bc8 Non développé (mob. 5)
Bf8		● Bf8 Non développé (mob. 0)
Paire de fous	● Oui	● Oui
Non développées	3 (● c1, ● 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	mobile
Ruptures	● d2-d4	● …f7-f5

A34a — English: Symmetrical, 3 Knights, 5.e4 Nb4 6.Bc4

1.c4 c5 2.Nc3 Nf6 3.Nf3 d5 4.cxd5 Nxd5 5.e4 Nb4 6.Bc4 * ● Trait aux Noirs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plans. Ke2 (62 % des parties) ; Bxe6 (Fou actif (mobilité 9) — 28 % des parties) ; O-O (Mettre le roi en sécurité, connecter les tours — 5 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plans. ...Nd3+ (Cavalier actif en d3 — 64 % des parties) ; ...Be6 (Fou actif (mobilité 7), Développer c8 — 30 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Partie
10. London Classic 2018 – Round 1.2 – Aronian, Levon – 1/2-1/2 – Vachier-Lagrave, Maxime – G4 1. Nf3 c5 2. c4 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Kf1 Ne6 9. d4 cxd4 10. Bxe6 Bxe6
1926 Bardejov – Round 2 – Walter, Max – 1/2-1/2 – Prokes, Ladislav – G6 1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 e6 7. d3 Be7 8. O-O O-O 9. Ne2 a6 10. a3 N4c6
1928 Vienna – Round 1 – Takacs, Sandor – 1-0 – Spielmann, Rudolf – G2 1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nxc1+ 8. Rxc1 Nc6 9. Qb3 e6 10. Rhd1 a6
1935 Moscow – Round 3 – Botvinnik, Mikhail – 1-0 – Menchik, Vera Frantsevna – G15 1. c4 Nf6 2. Nc3 c5 3. Nf3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 e6 7. O-O N8c6 8. d3 Be7 9. a3 Na6 10. Be3 Nab8
1938 URSS (URS Ch, semi final) - Round 1 - Sokolsky, Alexey - 1/2-1/2 - Budo, Alexander Semenovich - G6 1. c4 Nf6 2. Nc3 c5 3. Nf3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Kf1 Ne6 9. g3 g6 10. Kg2 Bg7
1940 Moscow (URS-ch12) - Round ? - Botvinnik, Mikhail - 1/2-1/2 - Gerstenfeld, Eduard - G39 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 e6 7. d3 Be7 8. O-O a6 9. a3 N4c6 10. Ne2 Nd7
1940 Moskou ch-URS – Round 1 – Botvinnik, Mikhail – 1/2-1/2 – Gerstenfeld, Eduard – G127 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 e6 7. d3 Be7 8. O-O a6 9. a3 N4c6 10. Ne2 Nd7
1945 Moscow (URS-sf) - Round 15 - Poliak, Abram - 1-0 - Verlinsky, Boris - G61 1. c4 Nf6 2. Nc3 c5 3. Nf3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Kf1 Ne6 9. d3 Nc6 10. Be3 Ned4
1946 Moscow Ch – Round 1 – Averbakh, Yuri L – 1-0 – Bondarevsky, Igor – G1 1. c4 Nf6 2. Nf3 c5 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Kf1 Ne6 9. Ne5 Qd4 10. Qa4+ Bd7
1950 Schiavno Zdroj – Round 1 – Kottnauer, Cenek – 1-0 – Greenfeld, Alon – G3 1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 e6 7. O-O Be7 8. d4 cxd4 9. Nxd4 O-O 10. Be3 N4c6
1956 Stevenson Memorial 4th – Round 2 – O'Kelly de Galway, Alberic – 1/2-1/2 – Mackay, Donald G – G2 1. c4 Nf6 2. Nc3 c5 3. Nf3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Be6 7. Bxe6 Nd3+ 8. Kf1 fxe6 9. Ng5 Nc6 10. Nxe6 Qd7
2026 Norway Chess Open - Round 4 - Keymer, Vincent - 0-1 - Praggnanandhaa R - G20 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Be6 7. Bb5+ Bd7 8. Bxd7+ Qxd7 9. Ne5 Qd4 10. a3 Nd3+
51. Biel GM 2018 – Round 6.3 – Svidler, Peter – 0-1 – Vachier-Lagrave, Maxime – G18 1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Kf1 Ne6 9. d3 Nc6 10. h4 g6
7. London Classic 2015 – Round 7.5 – Aronian, Levon – 1-0 – Topalov, Veselin – G35 1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Kf1 Ne6 9. b4 cxb4 10. Nd5 g6
76. Tata Steel Masters 2014 – Round 11.3 – Nakamura, Hikaru – 1/2-1/2 – Giri, Anish – G62 1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Kf1 Ne6 9. Ne5 Nc6 10. Nxc6 bxc6
79. Tata Steel GpA 2017 – Round 11.2 – Giri, Anish – 1/2-1/2 – Harikrishna, Pentala – G72 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nxc1+ 8. Rxc1 a6 9. d4 b5 10. Bd5 Ra7
8. London Classic 2016 – Round 3.1 – Aronian, Levon – 1/2-1/2 – So, Wesley – G11 1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Kf1 Nd3 9. Qe2 Nxc1 10. Rxc1 e6
Amber Blindfold 2002 – Round 2 – Piket, Jeroen – 1-0 – Ljubojevic, Ljubomir – G4 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Kf1 Ne6 9. Ne5 Nc6 10. Nxc6 bxc6
Bugojno 1984 – Round 1 – Larsen, Bent – 1/2-1/2 – Timman, Jan H – G54 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Kf1 Ne6 9. Ne5 g6 10. Qa4+ Bd7
Ch World (match) (cand.) (1/2) 1980 – Round 14 – Polugaevsky, Lev – 0-1 – Korchnoi, Viktor – G2 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Ke1 Ne6 9. b4 cxb4 10. Nd5 g6
FIDE World Cup 2017 – Round 5.1 – Svidler, Peter – 1/2-1/2 – Vachier-Lagrave, Maxime – G397 1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Kf1 Ne6 9. h4 Nd4 10. d3 Nbc6
FIDE World Cup 2017 – Round 5.4 – Svidler, Peter – 0-1 – Vachier-Lagrave, Maxime – G406 1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Kf1 Ne6 9. h4 Nd4 10. d3 e6
GCT Blitz Paris 2021 – Round 4.3 – So, Wesley – 1/2-1/2 – Svidler, Peter – G17 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Kf1 Ne6 9. h4 h5 10. b4 g6
Grand Prix de Bordeaux 1999 – Round 1.1 – Bauer, Christian – 0-1 – Leko, Peter – G1 1. c4 c5 2. Nf3 d5 3. cxd5 Nf6 4. Nc3 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Kf1 Ne6 9. Ne5 g6 10. Qa4+ Bd7
Linares 1983 – Round 1 – Seirawan, Yasser – 0-1 – Sax, Gyula – G5 1. c4 Nf6 2. Nc3 c5 3. Nf3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Kf1 Ne6 9. b4 cxb4 10. Nd5 g6
Phillips&Drew 1982 – Round 1 – Seirawan, Yasser – 1-0 – Miles, Anthony J – G1 1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Kf1 Ne6 9. b4 g6 10. bxc5 Bg7
Piterenka Rapid 2012 – Round 3 – Jakovenko, Dmitry – 0-1 – Nepomniachtchi, Ian – G5 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nxc1+ 8. Rxc1 a6 9. d4 b5 10. Bd5 Ra7
Renova FIDE GP Zug 2013 – Round 9.2 – Giri, Anish – 1/2-1/2 – Kasimdzhanov, Rustam – G49 1. c4 Nf6 2. Nf3 c5 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Kf1 Ne6 9. b4 cxb4 10. Ne2 Nc5
Riga Interzonal 1979 – Round 2 – Polugaevsky, Lev – 0-1 – Tal, Mikhail – G4 1. Nf3 c5 2. c4 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Be6 7. Bxe6 Nd3+ 8. Kf1 fxe6 9. Ng5 Qb6 10. Qe2 c4
Saint Louis Blitz 2018 – Round 3.4 – Dominguez Perez, Leinier – 0-1 – Vachier-Lagrave, Maxime – G14 1. Nf3 c5 2. c4 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Kf1 Ne6 9. h4 Nd4 10. Nb5 Be6
Saint Louis Blitz 2023 – Round 5.5 – Le, Quang Liem – 0-1 – Xiong, Jeffery – G25 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Kf1 Nd3 9. Qe2 Nxc1 10. Rxc1 a6
Saint Louis Rapid 2023 – Round 3.5 – Le, Quang Liem – 1-0 – Xiong, Jeffery – G15 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Kf1 Ne6 9. h4 Nc6 10. d3 Ned4
Superbet Classic 2021 – Round 8.3 – So, Wesley – 1/2-1/2 – Vachier-Lagrave, Maxime – G35 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Kf1 Ne6 9. h4 Nd4 10. Nb5 Ndc6
World Blitz 2017 – Round 20.39 – Dobrov, Vladimir – 0-1 – Volokitin, Andrei – G1053 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Kf1 Nd3 9. Ke2 Nf4+ 10. Kf1 Nd3
XX SuperGM 2003 – Round 12 – Vallejo Pons, Francisco – 1-0 – Leko, Peter – G36 1. Nf3 c5 2. c4 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Kf1 Ne6 9. b4 g6 10. bxc5 Bg7

A34a — Symmetrical, 3 Knights (1926)

1.c4 c5 2.Nc3 Nf6 3.Nf3 d5 4.cxd5 Nxd5 5.e4 Nb4 6.Bc4

Les coups candidats

6…Nd3+ — 83.0% (651 parties)

Ambassadeurs : Langer, Michael (7x), Suba, Mihai (6x), Miles, Anthony J (5x), Seirawan, Yasser (5x), Sutovsky, Emil (5x), Svidler, Peter (5x), Peters, Alexander John (3x), Pinter, Jozsef (3x)

6…Be6 — 11.6% (91 parties)

Ambassadeurs : Suba, Mihai (4x), Chow, Albert (3x), Chekhov, Valery A (2x), Kharitonov, Andrei (2x), Zilberstein, Valery I (2x), O'Kelly de Galway, Alberic (2x), Agdestein, Simen (2x), Suetin, Alexey S (2x)

6…e6 — 3.3% (26 parties)

Ambassadeurs : Miezis, Normunds (3x), Kottnauer, Cenek (1x), Greenfeld, Alon (1x), Bronstein, Luis Marcos (1x), Frias Apablaza, Victor (1x), Gheorghiu, Florin (1x), Peters, Alexander John (1x), Murey, Jacob (1x)

6…N8c6 — 0.9% (7 parties)

Ambassadeurs : Condie, Mark L (1x), Shamkovich, Leonid (1x), Marchand, Jacques (1x), Rousseau, Daniel (1x), Koopmann, Rolf, Dr. (1x), Heinzel, Olaf (1x), Szerlak, Andrzej (1x), Wilson, Mark L (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	6…Nd3+	6…Be6	6…e6	6…N8c6
<1800	15	87%	13%	—	—
1800-2200	170	85%	6%	5%	2%
2200-2600	450	84%	11%	4%	1%
2600+	54	93%	7%	—	—

Évolution par décennie (% des parties)

Décennie	N parties	6…Nd3+	6…Be6	6…e6	6…N8c6
1950s	3	33%	33%	33%	—
1970s	39	28%	62%	8%	—
1980s	118	75%	19%	2%	3%
1990s	102	75%	18%	3%	—
2000s	185	90%	5%	4%	—
2010s	209	90%	4%	3%	1%
2020s	128	91%	5%	2%	1%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
6…Nd3+	90%	91%	▲ +1.0%
6…Be6	4%	5%	▲ +1.2%
6…e6	3%	2%	▼ -1.8%
6…N8c6	1%	1%	▼ -0.7%

Joueurs célèbres

Champions du monde dans cette position

Tal, Mikhail — 2 parties
Kasparov, Garry — 2 parties
Hou, Yifan — 1 partie

Parties historiques

6…Nd3+ — 83.0% (651 parties)

1955 — Elliott, Henry J vs Sullivan, Joseph G — 0-1 — ?
1974 — Dahlhaus, Friedhelm vs Baltruschat, Rudolf — 1-0 — ?
1974 — Benko, Pal vs Garcia , Gandy — 1-0 — Hastings ENG
1978 — Perez Nivar, Marco Tulio vs Warsali, Edan — 1-0 — Buenos Aires ARG
1978 — Ungureanu, Emil vs Alburt, Lev — 1/2-1/2 — Bucharest ROU

6…Be6 — 11.6% (91 parties)

1956 — O'Kelly de Galway, Alberic vs Mackay, Donald G — 1/2-1/2 — Bognor Regis
1972 — Hickman, Herbert W vs Ruys, Frank C — 1-0 — USCCC-1
1973 — Wastfelt Torsten vs Englund Helge — 0-1 — ?
1976 — Ornstein, Axel vs Schmidt, Aaron Joel — 0-1 — Malmo SWE
1976 — O'Kelly de Galway, Alberic vs Palatnik, Semon — 1/2-1/2 — Solingen GER

6…e6 — 3.3% (26 parties)

1950 — Kottnauer, Cenek vs Greenfeld, Alon — 1-0 — Schiavno Zdroj
1975 — Portisch, Lajos vs Lengyel, Levente — 1/2-1/2 — HUN
1978 — Bronstein, Luis Marcos vs Frias Apablaza, Victor — 1/2-1/2 — Tramandai zt
1978 — Gheorghiu, Florin vs Peters, Alexander John — 1/2-1/2 — Lone Pine open
1981 — Whitehouse, David vs Poschel, Paul — 0-1 — E Lansing ch-MI M/X

6…N8c6 — 0.9% (7 parties)

1983 — Marchand, Jacques vs Rousseau, Daniel — 1-0 — Quebec ch Reserve
1984 — Condie, Mark L vs Shamkovich, Leonid — 1/2-1/2 — Troon
1989 — Koopmann, Rolf, Dr. vs Heinzel, Olaf — 1/2-1/2 — BL2-W8889 GER
2010 — Burdik, Lubomir vs Cuhra, Martin — 1/2-1/2 — Czech Republic
2014 — Szerlak, Andrzej vs Wilson, Mark L — 1-0 — ICCF