Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	—	● d7→e6, f7→e6
Passés	—	—
Majorité	● aile dame 3v2	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● b5 (3v0)	● b4 (2v0)
Cases faibles	—	—
Centre	—	—

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● d	● c

Pièces

	♔ Blancs	♚ Noirs
Bf1	● Bf1 Non développé (mob. 0)
Bf4	● Bf4 Actif (mob. 10)
Bc8		● Bc8 Non développé (mob. 0)
Bf8		● Bf8 Non développé (mob. 5)
Paire de fous	● Oui	● Oui
Non développées	3 (● 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

A33b — English: Symmetrical, Two Knights, 5.Nc3 Nc6 6.Bf4

1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Nc6 6.Bf4 * ● Trait aux Noirs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plans. e3 (Libérer Bf1, préparer Bd3 — 24 % des parties) ; Ndb5 (22 % des parties) ; Nxc6 (Menace d8 — 13 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plans. ...d5 (Occuper le centre — 51 % des parties) ; ...d6 (Libérer Bc8 — 20 % des parties) ; ...Bb4 (Clouer c3, Fou actif (mobilité 7), Développer f8 — 10 % des parties) ; ...a6 (Préparer expansion aile dame — 10 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Partie
? 1980 – Round ? – Korchnoi, Viktor – 1/2-1/2 – Polugaevsky, Lev – G3 1. c4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bf4 Bb4 7. Nb5 O-O 8. Bc7 Qe7 9. Bd6 Bxd6 10. Qxd6 Qd8
1955 Novi Sad – Round 11 – Karaklajic, Nikola – 1-0 – Segi, Lajos – G86 1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 Nc6 5. Nc3 e6 6. Bf4 a6 7. Nxc6 bxc6 8. e4 d5 9. cxd5 cxd5 10. exd5 Nxd5
2026 Tata Steel India Rapid - Round 8.5 - Erigaisi Arjun - 1-0 - Niemann, Hans Moke - G40 1. Nf3 1... Nf6 2. c4 2... c5 3. Nc3 3... Nc6 4. d4 4... cxd4 5. Nxd4 5... e6 6. Bf4 6... d5 7. cxd5 7... Nxd5 8. Nxc6 8... bxc6 9. Bd2 9... Bb4 10. a3 10... Bxc3
41. Olympiad Open 2014 – Round 4.12 – Lalit Babu M R – 0-1 – Ortiz Suarez, Isan Reynaldo – G248 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. Nc3 cxd4 5. Nxd4 Nc6 6. Bf4 d6 7. Nxc6 bxc6 8. g3 Be7 9. Bg2 d5 10. Qa4 Bd7
42. Olympiad 2016 – Round 9.5 – Neiksans, Arturs – 1/2-1/2 – Borisek, Jure – G659 1. Nf3 Nf6 2. c4 c5 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. Bf4 d5 7. e3 Be7 8. Be2 O-O 9. O-O dxc4 10. Nxc6 bxc6
9. London Classic 2017 – Round 9.1 – Nepomniachtchi, Ian – 1/2-1/2 – Vachier-Lagrave, Maxime – G41 1. Nf3 c5 2. c4 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bf4 d5 7. e3 Bb4 8. Be2 Bd7 9. Nb5 e5 10. Bg5 a6
FIDE Candidates 2013 – Round 2.2 – Carlsen, Magnus – 1/2-1/2 – Kramnik, Vladimir – G6 1. c4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bf4 d5 7. e3 Bb4 8. Be2 dxc4 9. Nxc6 Qxd1+ 10. Rxd1 bxc6
FIDE World Cup 2015 – Round 1.3 – Bruzon Batista, Lazaro – 1-0 – Vidit, Santosh Gujrathi – G151 1. Nf3 Nf6 2. c4 c5 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 e6 6. Bf4 d5 7. e3 Bb4 8. Nxc6 bxc6 9. Qa4 Qb6 10. Bd3 O-O
FIDE World Cup 2015 – Round 4.2 – So, Wesley – 0-1 – Vachier-Lagrave, Maxime – G387 1. Nf3 c5 2. c4 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bf4 d5 7. e3 Bb4 8. Be2 O-O 9. O-O Bxc3 10. bxc3 Re8
FIDE World Cup 2017 – Round 4.3 – Bu, Xiangzhi – 0-1 – Svidler, Peter – G387 1. Nf3 c5 2. c4 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bf4 d5 7. e3 Bb4 8. Be2 O-O 9. O-O Bxc3 10. bxc3 Re8
FIDE World Cup 2019 – Round 1.1 – Albornoz Cabrera, Carlos Daniel – 1/2-1/2 – Svidler, Peter – G64 1. Nf3 Nf6 2. c4 c5 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 e6 6. Bf4 d5 7. e3 Bb4 8. Be2 Bd7 9. O-O dxc4 10. Bxc4 Nxd4
FIDE World Cup 2025 – Round R3 Classical 1 – A.R. Saleh Salem – 0-1 – Aronian Levon – G451 1. c4 e6 2. Nc3 d5 3. d4 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. e3 O-O 7. Bd3 Re8 8. Nf3 h6 9. Bf4 c5 10. dxc5 Bxc5
FIDE World Cup 2025 – Round R3 Classical 1 – Giri Anish – 1/2-1/2 – Donchenko Alexander – G440 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. d3 d6 6. c3 Nf6 7. e5 Nd5 8. exd6 Qxd6 9. Nbd2 Nf6 10. Nc4 Qc7
Interpolis 1982 – Round 1 – Andersson, Ulf 1949 – 1/2-1/2 – Sosonko, Gennadi – G41 1. Nf3 c5 2. c4 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bf4 d5 7. cxd5 Nxd5 8. Nxc6 bxc6 9. Bd2 Bb4 10. Rc1 Rb8
KRO-tweekamp 1982 – Round 3 – Korchnoi, Viktor – 1-0 – Timman, Jan H – G2 1. Nf3 Nf6 2. c4 c5 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. Bf4 d5 7. cxd5 Nxd5 8. Nxc6 bxc6 9. Bd2 Bb4 10. Nxd5 Bxd2+
Linares 1983 – Round 1 – Andersson, Ulf 1949 – 1/2-1/2 – Timman, Jan H – G9 1. Nf3 c5 2. c4 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bf4 d5 7. cxd5 Nxd5 8. Nxc6 bxc6 9. Bd2 Bb4 10. Qc2 Qa5
Palma De Mallorca GP 2017 – Round 4.2 – Svidler, Peter – 1/2-1/2 – Vachier-Lagrave, Maxime – G29 1. c4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bf4 d5 7. e3 Bb4 8. Be2 Bd7 9. O-O dxc4 10. Bxc4 1/2-1/2
Superbet Rapid & Blitz Poland 2025 – Round 23 – Deac Bogdan-Daniel – 1-0 – Firouzja Alireza – G111 1. d4 e6 2. Nf3 c5 3. c4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bf4 d6 7. Nxc6 bxc6 8. g3 Be7 9. Bg2 d5 10. cxd5 cxd5
Superbet Rapid & Blitz Poland 2025 – Round 9 – Deac Bogdan-Daniel – 1/2-1/2 – Vachier-Lagrave Maxime – G44 1. Nf3 Nf6 2. c4 c5 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. Bf4 d5 7. cxd5 Nxd5 8. Nxc6 bxc6 9. Bd2 Rb8 10. e4 Nf6
TCh-RUS 2008 – Round 2 – Belozerov, Andrei – 1-0 – Moiseenko, Alexander – G63 1. Nf3 c5 2. c4 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 Nf6 6. Bf4 d6 7. Ndb5 e5 8. Bg5 a6 9. Na3 Be7 10. e3 Be6
World Blitz 2015 – Round 16.66 – Vidit, Santosh Gujrathi – 1-0 – Donchenko, Alexander – G1026 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. Nc3 cxd4 5. Nxd4 Nc6 6. Bf4 Nxd4 7. Qxd4 d6 8. O-O-O Be7 9. Bxd6 O-O 10. Bxe7 Qxe7
World Blitz 2016 – Round 4.20 – Svane, Rasmus – 0-1 – Matlakov, Maxim – G148 1. d4 Nf6 2. c4 e6 3. Nc3 c5 4. Nf3 cxd4 5. Nxd4 Nc6 6. Bf4 d5 7. e3 Bb4 8. Nxc6 bxc6 9. Qa4 Qb6 10. Bd3 O-O
World Blitz 2017 – Round 10.21 – Akobian, Varuzhan – 1/2-1/2 – Howell, David W L – G509 1. Nf3 Nf6 2. c4 c5 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. Bf4 d5 7. e3 Bb4 8. Be2 dxc4 9. Nxc6 Qxd1+ 10. Rxd1 bxc6
World Rapid 2019 – Round 2.26 – Vishnu Prasanna, V – 0-1 – Ponkratov, Pavel – G98 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. Nc3 cxd4 5. Nxd4 Nc6 6. Bf4 d5 7. e3 Bb4 8. Qc2 O-O 9. O-O-O Bxc3 10. Qxc3 Ne4

A33b — Symmetrical, Two Knights (1955)

1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Nc6 6.Bf4

Les coups candidats

6…d5 — 51.1% (266 parties)

Ambassadeurs : Vachier-Lagrave, Maxime (9x), Vleer, Henk (6x), Ragozin, Evgeni (3x), Murey, Jacob (3x), Prraneeth Vuppala (3x), Rogulj, Branko (3x), Gelfand, Boris (3x), Korchnoi, Viktor (2x)

6…d6 — 20.3% (106 parties)

Ambassadeurs : Li, Rachael (3x), Szabo, Vilmos (2x), Indjic, Aleksandar (2x), Cordova, Emilio (2x), Schoeneberg, Manfred (1x), Gross, Stefan (1x), Smejkal, Jan (1x), Sosonko, Gennadi (1x)

6…Bb4 — 10.4% (54 parties)

Ambassadeurs : Ragozin, Evgeni (2x), Hulak, Krunoslav (2x), Ivanchuk, Vasyl (2x), Serrer, Christoph (1x), Boersma, Paul (1x), Korchnoi, Viktor (1x), Polugaevsky, Lev (1x), Laube, Reiner (1x)

6…a6 — 10.2% (53 parties)

Ambassadeurs : ? (2x), Aadhitha Karikalan (1x), Alsjo, Sigge (1x), Ungureanu, Emil (1x), Garcia Martinez, Silvino (1x), Guddahl, Viggo (1x), Sorensen, Dick (1x), Rashkovsky, Nukhim N (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	6…d5	6…d6	6…Bb4	6…a6
<1800	10	50%	10%	20%	10%
1800-2200	99	42%	24%	9%	14%
2200-2600	319	51%	21%	10%	10%
2600+	64	78%	12%	5%	—

Évolution par décennie (% des parties)

Décennie	N parties	6…d5	6…d6	6…Bb4	6…a6
1950s	1	—	—	—	100%
1970s	4	—	—	—	75%
1980s	23	48%	17%	30%	—
1990s	55	33%	16%	24%	16%
2000s	86	43%	19%	15%	15%
2010s	222	54%	25%	7%	6%
2020s	130	62%	17%	4%	10%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
6…d5	54%	62%	▲ +7.5%
6…d6	25%	17%	▼ -7.9%
6…Bb4	7%	4%	▼ -3.4%
6…a6	6%	10%	▲ +3.7%

Joueurs célèbres

Champions du monde dans cette position

Carlsen, Magnus — 1 partie
Kramnik, Vladimir — 1 partie

Parties historiques

6…d5 — 51.1% (266 parties)

1980 — Stean, Michael F vs Liberzon, Vladimir M — 1-0 — Baden-Baden GER
1980 — Trois, Francisco R.T. vs Rogulj, Branko — 0-1 — Virovitica CRO
1980 — Ristic, Nenad vs Rogulj, Branko — 1/2-1/2 — Smederevska Palanka
1982 — Korchnoi, Viktor vs Timman, Jan H — 1-0 — Hilversum NED
1982 — Andersson, Ulf vs Sosonko, Gennadi — 1/2-1/2 — Tilburg NED

6…d6 — 20.3% (106 parties)

1980 — Smejkal, Jan vs Sosonko, Gennadi — 1/2-1/2 — Malta ol
1981 — Aguila, Gustavo vs D`Arruda, Ricardo D. — 1-0 — Embalse
1982 — Schoeneberg, Manfred vs Gross, Stefan — 1-0 — Leipzig GER
1986 — Shabalov, Alexander vs Sokolov, Andrei — 1/2-1/2 — Minsk BLR
1990 — Keitlinghaus, Ludger vs Schmittdiel, Eckhard — 1-0 — Prague CZE

6…Bb4 — 10.4% (54 parties)

1980 — Korchnoi, Viktor vs Polugaevsky, Lev — 1/2-1/2 — Buenos Aires ARG
1983 — Laube, Reiner vs Markmann, Ulrich — 0-1 — Lemgo
1983 — Schandorff, Lars vs Horvath, Jozsef — 1/2-1/2 — EU-ch U20 Groningen NED
1984 — Murey, Jacob vs Hulak, Krunoslav — 1/2-1/2 — Berlin-West
1988 — M.Roma vs M H Moin — 1-0 — Dator mOete

6…a6 — 10.2% (53 parties)

1955 — Aadhitha Karikalan vs Alsjo, Sigge — 1-0 — Novi Sad SRB
1971 — Ungureanu, Emil vs Garcia Martinez, Silvino — 1-0 — Bucharest ROU
1971 — Guddahl, Viggo vs Sorensen, Dick — 0-1 — Schilde
1979 — Rashkovsky, Nukhim N vs Suetin, Alexey S — 1/2-1/2 — Sochi RUS
1991 — Lahav, Ehud vs Sindik, Ervin — 1/2-1/2 — Tel Aviv ISR

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