Structure de pions
♔ Blancs ♚ Noirs
Pions doublés — —
Pions isolés — —
Arriérés — —
Chaînes ● f2→e3 ● d7→e6, f7→e6
Passés — —
Majorité ● aile dame 3v2 —
Cases
♔ Blancs ♚ Noirs
Cases fortes ● d4 (2v1), ● b5 (3v0) ● b4 (2v0)
Cases faibles — —
Centre ● d4 (2v1) ● e5 (1v0)
Colonnes et diagonales
♔ Blancs ♚ Noirs
Semi-ouvertes ● d ● c
Pièces
♔ Blancs ♚ Noirs
Bc1 ● Bc1 Non développé (mob. 1)
Bf1 ● Bf1 Non développé (mob. 2)
Bc8 ● Bc8 Non développé (mob. 0)
Bf8 ● Bf8 Non développé (mob. 5)
Paire de fous ● Oui ● Oui
Non développées 4 (● c1, ● f1, ● a1, ● h1) 4 (● 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 — ● …d7-d5

A33d — English: Symmetrical, Two Knights, 5.Nc3 Nc6 6.e3

1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Nc6 6.e3 *   ● Trait aux Noirs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1
bR
bB
bQ
bK
bB
bR
bP
bP
bP
bP
bP
bP
bN
bP
bN
Case forte (3v0)
wP
wNCase forte (2v1)
wN
wPPion central
wP
wP
wP
wP
wP
wR
wB
wQ
wK
wB
wR
abcdefgh
Plans. Be2 (Fou actif (mobilité 5), Développer f1 — 36 % des parties) ; Bd2 (Développer c1 — 20 % des parties) ; Qc2 (Prépare O-O-O — 7 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8
wR
wB
wK
wQ
wB
wR
wP
wP
wP
wP
wP
wP
wN
wN
wP
Case forte (2v0)
bN
bP
bN
bP
bP
bP
bP
bP
bP
bR
bBFou actif — mobilité 5
bK
bQ
bB
bR
hgfedcba
Plans. ...Bb4 (Clouer c3, Fou actif (mobilité 7), Développer f8 — 40 % des parties) ; ...Be7 (Fou actif (mobilité 5), Développer f8 — 23 % des parties) ; ...d5 (Occuper le centre — 19 % des parties) ; ...a6 (Préparer expansion aile dame — 10 % des parties).
Avantages
Faiblesses
Diagonale active
Plans
Partie
1947 Moscow Ch – Round 1 – Aronin, Lev – 0-1 – Kan, Ilya A – G1
1. c4 c5 2. Nf3 Nf6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 e6 6. e3 Bb4 7. Bd2 O-O 8. Be2 d5 9. cxd5 Nxd4 10. exd4 exd5
1952 Miedzyzdroje – Round 7 – Plater, Kazimierz – 1/2-1/2 – Balanel, Ion – G39
1. c4 Nf6 2. Nc3 c5 3. Nf3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. e3 Bb4 7. Bd2 O-O 8. Be2 b6 9. Nxc6 dxc6 10. Bf3 Qd7
1954 Belgrade – Round 10 – Wade, Robert G – 1/2-1/2 – Milic, Borislav – G85
1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 Nc6 5. Nc3 e6 6. e3 Bb4 7. Nxc6 bxc6 8. Bd2 O-O 9. Be2 Rb8 10. O-O d5
1954 Belgrade – Round 4 – Porrecca, Giorgio – 0-1 – Barcza, Gedeon – G51
1. Nf3 c5 2. c4 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. e3 Bb4 7. Qb3 Bc5 8. Nf3 O-O 9. Be2 b6 10. O-O Bb7
1954 New York – Round 2 – Pavey, Max – 0-1 – Keres, Paul – G10
1. Nf3 Nf6 2. c4 c5 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. e3 Bb4 7. Qc2 d5 8. Nxc6 bxc6 9. Bd2 O-O 10. Be2 e5
1956 Leningrad ch-URS – Round 1 – Bannik, Anatolij – 0-1 – Kholmov, Ratmir D – G5
1. c4 c5 2. Nc3 Nf6 3. Nf3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. e3 Be7 7. Be2 O-O 8. O-O d5 9. cxd5 Nxd5 10. Nxd5 exd5
1956 URS Ch sf – Round ? – Rovner, Dmitry – 1/2-1/2 – Kotov, Alexander. – G36
1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 e6 5. Nc3 Nc6 6. e3 Bb4 7. Bd2 O-O 8. Be2 Nxd4 9. exd4 d5 10. cxd5 Bxc3
1957 Danmarksmesterskabet – Round 4 – Blom, Kaj – 1/2-1/2 – Andersen, Borge – G14
1. Nf3 c5 2. c4 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. e3 Bb4 7. Bd2 O-O 8. Be2 Nxd4 9. exd4 d5 10. cxd5 exd5
1957 Minsk zt – Round 12 – Roizman, Abram Y – 1/2-1/2 – Suetin, Alexey S – G79
1. c4 Nf6 2. Nc3 c5 3. Nf3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. e3 Bb4 7. Be2 Ne4 8. Qc2 Qa5 9. Qxe4 Bxc3+ 10. Kf1 Bxd4
1957 Minsk zt – Round 16 – Zilber, Israel – 0-1 – Suetin, Alexey S – G116
1. Nf3 c5 2. c4 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. e3 Bb4 7. Nb5 O-O 8. a3 Be7 9. Be2 d5 10. O-O dxc4
1958 UKR Ch – Round 1 – Zamikhovsky, Abram – 0-1 – Platonov, Igor V – G2
1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 Nc6 5. Nc3 e6 6. e3 Bb4 7. Qc2 O-O 8. a3 Nxd4 9. exd4 Be7 10. Bd3 b6
1959 Alekhine Memorial – Round 9 – Ezzat Philip, Maxim – 1/2-1/2 – Vasiukov, Evgeni – G46
1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 Nc6 5. Nc3 e6 6. e3 Bb4 7. Nb5 O-O 8. a3 Be7 9. Be2 d5 10. cxd5 exd5
1960 Mar del Plata – Round 7 – Letelier Martner, Rene – 1-0 – Redolfi, Argentino Rodolfo – G61
1. c4 Nf6 2. Nc3 c5 3. Nf3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. e3 Bb4 7. Bd2 O-O 8. a3 Be7 9. Be2 b6 10. Nf3 Bb7
1961 Buenos Aires CA – Round 5 – Alcaraz Suarez, Juan Camilo – 1/2-1/2 – Filip, Miroslav – G11
1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 e6 5. Nc3 Nc6 6. e3 Bb4 7. Bd2 O-O 8. Be2 d5 9. cxd5 exd5 10. Nxc6 bxc6
1963 UKR Ch – Round 11 – Zamikhovsky, Abram – 1/2-1/2 – Tokarev, Aleksandr – G71
1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 Nc6 5. Nc3 e6 6. e3 a6 7. Be2 Be7 8. O-O O-O 9. b3 Qc7 10. Bb2 d6
1964 Kecskemet zt – Round 1 – Prameshuber, Alexander – 0-1 – Pachman, Ludek – G87
1. Nf3 Nf6 2. d4 e6 3. c4 c5 4. Nc3 cxd4 5. Nxd4 Nc6 6. e3 Bb4 7. Bd2 O-O 8. Be2 d5 9. cxd5 exd5 10. Nxc6 bxc6
1964 Tel Aviv olm prel – Round 4 – Prameshuber, Alexander – 0-1 – Langeweg, Kick – G139
1. d4 Nf6 2. Nf3 c5 3. c4 cxd4 4. Nxd4 e6 5. Nc3 Nc6 6. e3 Bb4 7. Bd2 Bc5 8. Nb3 Be7 9. Be2 O-O 10. O-O d5
1965 Copenhagen – Round 10 – Taimanov, Mark E – 1/2-1/2 – Suetin, Alexey S – G89
1. Nf3 c5 2. c4 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. e3 d5 7. Be2 Bc5 8. O-O Bxd4 9. exd4 dxc4 10. Bxc4 O-O
1965 Novi Sad – Round 1 – Bertok, Mario Jr. – 1/2-1/2 – ? – G1
1. c4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. e3 d5 7. cxd5 Nxd5 8. Nxc6 bxc6 9. Be2 Nxc3 10. Qxd8+ Kxd8
1965 Tbilisi Tbilisi GEO – Round 1 – Balcerowski, Witold – 0-1 – Buslaev, Aleksander – G17
1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. Nc3 cxd4 5. Nxd4 Nc6 6. e3 Be7 7. Be2 O-O 8. O-O d5 9. cxd5 Nxd4 10. Qxd4 Nxd5
1966 Sochi Chigorin Memorial 04th – Round 5 – Sergievsky, Vladimir D – 1/2-1/2 – Matulovic, Milan – G23
1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 Nc6 5. Nc3 e6 6. e3 Bb4 7. Nb5 O-O 8. a3 Bxc3+ 9. Nxc3 d5 10. Be2 dxc4
1966 World Championship 26th – Round 8 – Petrosian, Tigran V – 1/2-1/2 – Spassky, Boris Vasily – G7
1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. e3 Be7 7. Be2 O-O 8. O-O d6 9. b3 a6 10. Bb2 Bd7
1968 Alma Ata ch-URS – Round 18 – Platonov, Igor V – 1/2-1/2 – Osnos, Vyacheslav – G151
1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. Nc3 cxd4 5. Nxd4 Nc6 6. e3 Bb4 7. Bd2 O-O 8. a3 Be7 9. Be2 d5 10. cxd5 exd5
1968 Golden Knights – Round ? – Feuchter, C – 0-1 – Zalys, Ignas – G2
1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. Nc3 cxd4 5. Nxd4 Nc6 6. e3 Bb4 7. Bd2 Nxd4 8. exd4 b6 9. Bd3 Bb7 10. O-O O-O
1969 Steinheim ch OWL – Round 10 – Werner, Stephan – 1/2-1/2 – Groenegress, Wilfried – G10
1. Nf3 c5 2. c4 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. e3 Be7 7. Be2 O-O 8. O-O Nxd4 9. Qxd4 d5 10. Rd1 dxc4
1972 Skopje ol (Men) fin-A – Round 11 – Debarnot, Roberto – 1/2-1/2 – Ungureanu, Emil – G129
1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 e6 5. e3 Nc6 6. Nc3 Bb4 7. Be2 O-O 8. O-O d5 9. cxd5 exd5 10. Ncb5 Ne5
40. Olympiad Open 2012 – Round 4.12 – Kurajica, Bojan – 1-0 – Ivanisevic, Ivan – G228
1. d4 Nf6 2. Nf3 c5 3. c4 cxd4 4. Nxd4 Nc6 5. Nc3 e6 6. e3 d5 7. Be2 Bd6 8. O-O O-O 9. b3 Re8 10. Bb2 Ne5
FIDE World Cup 2019 – Round 1.4 – Nakamura, Hikaru – 1-0 – Bellahcene, Bilel – G172
1. Nf3 Nf6 2. c4 c5 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. e3 d5 7. cxd5 exd5 8. Bb5 Bd7 9. O-O Bd6 10. Nf3 Be6
IBM 1978 – Round 2 – Andersson, Ulf 1949 – 1/2-1/2 – Ljubojevic, Ljubomir – G7
1. Nf3 Nf6 2. c4 c5 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. e3 Be7 7. Be2 O-O 8. O-O d5 9. b3 Nxd4 10. Qxd4 dxc4
Saint Louis Rapid 2022 – Round 2.5 – Shankland, Sam – 1/2-1/2 – Dominguez Perez, Leinier – G10
1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. e3 Be7 7. Be2 O-O 8. O-O d5 9. cxd5 Nxd4 10. exd4 Nxd5
World Blitz 2015 – Round 9.29 – Bogdanovich, Saveliy Vl – 1-0 – Belov, Vladimir – G547
1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. d4 cxd4 5. Nxd4 Nc6 6. e3 d5 7. cxd5 exd5 8. Be2 Bc5 9. O-O O-O 10. h3 Re8
World Cup 1989 – Round 11 – Korchnoi, Viktor – 1/2-1/2 – Karpov, Anatoly – G67
1. c4 Nf6 2. Nc3 c5 3. Nf3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. e3 d5 7. cxd5 exd5 8. Bb5 Bd7 9. Nde2 Be6 10. Nd4 Rc8
World Rapid 2019 – Round 11.7 – Andreikin, Dmitry – 1/2-1/2 – Nepomniachtchi, Ian – G742
1. Nf3 c5 2. c4 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. e3 Be7 7. Be2 O-O 8. O-O b6 9. b3 Bb7 10. Bb2 Rc8

A33d — Symmetrical, Two Knights (1947)
1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Nc6 6.e3
Les coups candidats
6…Bb4 — 40.2% (275 parties)
Ambassadeurs : Matulovic, Milan (2x), Suetin, Alexey S (2x), Prameshuber, Alexander (2x), Baev, Pavel (1x), Keres, Paul (1x), Shashin, Alexsander A (1x), Tolonen, Leo (1x), Sliwa, Bogdan (1x)
6…Be7 — 23.0% (157 parties)
Ambassadeurs : Peschel, Andreas (2x), Maiwald, Jens-Uwe (2x), Shankland, Sam (2x), Paidousis, Aristidis (1x), Kchouk, Bechir (1x), Petrosian, Tigran A. (1x), Spassky, Alexandre (1x), Petrosian, Tigran V. (1x)
6…d5 — 19.4% (133 parties)
Ambassadeurs : Karpov, Anatoly (3x), Petrosian, Tigran V. (3x), Berndt, Klaus (2x), Vaitonis, Povilas (1x), Sherwin, James T (1x), Blagidze, Alexander (1x), Vasiukov, Evgeni (1x), Milev, Zdravko (1x)
6…a6 — 9.6% (66 parties)
Ambassadeurs : Grillitsch, Karl (2x), Lendwai, Reinhard (2x), Gianordoli Cesar (1x), Jose, Ribeiro (1x), Zamkovskaya, Violetta Aleks (1x), Tokarev, Aleksandr (1x), Balcerowski, Witold (1x), Pytel, Krzysztof (1x)
Analyse statistique des coups candidats
Répartition par niveau Elo (% des parties)
Tranche Elo N parties 6…Bb4 6…Be7 6…d5 6…a6
<1800 44 41% 23% 9% 18%
1800-2200 236 39% 25% 18% 11%
2200-2600 255 42% 23% 23% 6%
2600+ 19 21% 16% 58% —
Évolution par décennie (% des parties)
Décennie N parties 6…Bb4 6…Be7 6…d5 6…a6
1950s 16 69% 12% 19% —
1960s 29 41% 21% 28% 7%
1970s 37 35% 19% 32% 8%
1980s 27 48% 30% 15% 7%
1990s 107 30% 25% 20% 14%
2000s 184 38% 26% 15% 12%
2010s 216 43% 22% 17% 9%
2020s 68 47% 16% 29% 4%
Tendances récentes (2010s → 2020s)
Coup 2010s 2020s Δ
6…Bb4 43% 47% ▲ +4.5%
6…Be7 22% 16% ▼ -6.0%
6…d5 17% 29% ▲ +12.3%
6…a6 9% 4% ▼ -4.4%
Joueurs célèbres
Champions du monde dans cette position
Karpov, Anatoly — 3 parties
Ju, Wenjun — 2 parties
Tal, Mikhail — 1 partie
Kramnik, Vladimir — 1 partie
Hou, Yifan — 1 partie
Parties historiques
6…Bb4 — 40.2% (275 parties)
1952 — Partyka, Kazimierz vs Balanel, Ion — 1/2-1/2 — Miedzyzdroje
1954 — Baev, Pavel vs Keres, Paul — 0-1 — New York, NY USA
1954 — Wade, Robert G vs Milic, Borislav — 1/2-1/2 — Belgrade SRB
1954 — Porrecca, Giorgio vs Anay Barche — 0-1 — Belgrade SRB
1956 — Rovner, Dmitry vs Kotov, Alexander — 1/2-1/2 — Leningrad RUS
6…Be7 — 23.0% (157 parties)
1956 — Bannik, Anatolij vs Kholmov, Ratmir D — 0-1 — Leningrad ch-URS
1957 — Troger, Emma vs Schuster, Theodor — 1-0 — Bad Neuenahr GER
1960 — Paidousis, Aristidis vs Kchouk, Bechir — 1/2-1/2 — Leipzig GER
1965 — Balcerowski, Witold vs Buslaev, Aleksander — 0-1 — Tbilisi Tbilisi GEO
1966 — Petrosian, Tigran A. vs Spassky, Alexandre — 1/2-1/2 — Moscow RUS
6…d5 — 19.4% (133 parties)
1953 — Wade, Robert G vs Barden, Leonard — 1/2-1/2 — Hastings ch-BCF
1956 — Vaitonis, Povilas vs Sherwin, James T — 0-1 — Montreal CAN
1957 — Blagidze, Alexander vs Vasiukov, Evgeni — 1/2-1/2 — Kiev UKR
1963 — Keene, Raymond D vs Michael John Basman — 1-0 — Bognor
1963 — Rapaka Samuel Paul vs Fischer, Robert J — 0-1 — New York, NY USA
6…a6 — 9.6% (66 parties)
1961 — Gianordoli Cesar vs Jose, Ribeiro — 0-1 — ?
1963 — Zamkovskaya, Violetta Aleks vs Tokarev, Aleksandr — 1/2-1/2 — Kiev UKR
1975 — Balcerowski, Witold vs Pytel, Krzysztof — 1-0 — Augustow Tch-POL
1976 — Sorensen, Arne vs Oe, Gunnar — 1/2-1/2 — DEN
1977 — Knezevic, Milorad vs Messing, Hrvoje — 1/2-1/2 — Zagreb CRO

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