Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	—	● b6→c5, a7→b6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● b5 (2v0), ● d5 (2v1)	—
Cases faibles	—	—
Centre	● d5 (2v1), ● 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. 2)
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	mobile
Ruptures	● d2-d4	● …d7-d5

A34l — English: Symmetrical, 3 Knights, 3…b6

1.c4 c5 2.Nc3 Nf6 3.Nf3 b6 * ○ Trait aux Blancs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plans. g3 (Préparer le fianchetto — 42 % des parties) ; e4 (Occuper le centre — 29 % des parties) ; d4 (Occuper le centre — 14 % des parties) ; e3 (Libérer Bf1, préparer Bd3 — 14 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plans. ...Bb7 (Fianchetto, fou sur la grande diagonale — 52 % des parties) ; ...d6 (Libérer Bc8 — 22 % des parties) ; ...g6 (Préparer le fianchetto — 5 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Partie
1929 Duisburg – Round 12 – Porath, Yosef – 0-1 – Bluemich, Max – G12 1. c4 Nf6 2. Nc3 c5 3. Nf3 b6 4. e4 Bb7 5. e5 Ne4 6. Nb1 d6 7. d3 Nxf2 8. Kxf2 dxe5 9. Nc3 g6 10. Be2 Bg7
1955 Argentina – Round 12 – Najdorf, Miguel – 1-0 – Reinhardt, Heinrich – G81 1. c4 Nf6 2. Nf3 c5 3. Nc3 b6 4. e4 d6 5. d4 cxd4 6. Nxd4 Bb7 7. f3 g6 8. Be3 Bg7 9. Qd2 Nc6 10. Be2 Nxd4
42. Olympiad 2016 – Round 7.22 – Roiz, Michael – 1/2-1/2 – Flores, Diegoego – G500 1. Nf3 Nf6 2. c4 c5 3. Nc3 b6 4. e3 g6 5. d4 Bg7 6. d5 O-O 7. Bd3 e6 8. O-O exd5 9. cxd5 d6 10. h3 Ba6
Brussels 1987 – Round 1 – Korchnoi, Viktor – 1-0 – Winants, Luc – G35 1. Nf3 c5 2. c4 Nf6 3. Nc3 b6 4. e4 Nc6 5. d4 cxd4 6. Nxd4 Bb7 7. Be3 e6 8. f3 Qb8 9. Qd2 Be7 10. O-O-O O-O
Brussels 1987 – Round 1 – Ljubojevic, Ljubomir – 1-0 – Winants, Luc – G34 1. Nf3 c5 2. c4 Nf6 3. Nc3 b6 4. e4 Nc6 5. d4 cxd4 6. Nxd4 Bb7 7. Be2 e6 8. O-O Bb4 9. Ndb5 Qb8 10. a3 Be7
Brussels 1987 – Round 1 – Tal, Mikhail – 1-0 – Winants, Luc – G36 1. Nf3 c5 2. c4 Nf6 3. Nc3 b6 4. e4 Nc6 5. d4 cxd4 6. Nxd4 Bb7 7. Bf4 d6 8. Nf3 g6 9. Qd2 Bg7 10. Be2 Rc8
Fontys 1997 – Round ? – Kramnik, Vladimir – 1/2-1/2 – Adams, Michael – G4 1. Nf3 Nf6 2. c4 b6 3. Nc3 c5 4. e4 d6 5. d4 cxd4 6. Nxd4 Bb7 7. Qe2 Nc6 8. Nxc6 Bxc6 9. Bg5 Nd7 10. O-O-O h6
Las Palmas 1981 – Round 10 – Larsen, Bent – 1-0 – Garcia Padron, Jose – G26 1. c4 Nf6 2. Nf3 c5 3. Nc3 b6 4. e3 g6 5. b3 Bg7 6. Bb2 O-O 7. Be2 Bb7 8. O-O d6 9. Rc1 Nbd7 10. d4 Rc8
Madrid 1973 – Round 11 – Portisch, Lajos – 1/2-1/2 – Ljubojevic, Ljubomir – G22 1. Nf3 c5 2. c4 Nf6 3. Nc3 b6 4. e4 d6 5. g3 Bb7 6. d3 e6 7. Bg2 Be7 8. O-O Nbd7 9. Re1 Qc7 10. b3 a6
Novi Sad olm 1990 – Round 7 – Agdestein, Simen – 1/2-1/2 – Latorre Miralles, Gerard – G46 1. Nf3 Nf6 2. c4 c5 3. Nc3 b6 4. e4 d6 5. d4 cxd4 6. Nxd4 Bb7 7. Qe2 g6 8. Bg5 Bg7 9. O-O-O Nbd7 10. f4 Qb8
PCA Qualifiers 1993 – Round 7 – Kramnik, Vladimir – 1/2-1/2 – Adams, Michael – G139 1. Nf3 Nf6 2. c4 b6 3. Nc3 c5 4. e4 d6 5. d4 cxd4 6. Nxd4 Bb7 7. Qe2 e6 8. g3 Nc6 9. Nxc6 Bxc6 10. Bg2 Be7
Phillips&Drew 1980 – Round 12 – Korchnoi, Viktor – 1/2-1/2 – Gheorghiu, Florin – G31 1. c4 c5 2. Nf3 Nf6 3. Nc3 b6 4. e4 d6 5. d4 cxd4 6. Nxd4 Bb7 7. Qe2 Nc6 8. Nxc6 Bxc6 9. Bg5 Nd7 10. O-O-O Qc8
Thessaloniki olm 1988 – Round 5 – Portisch, Lajos – 1/2-1/2 – Georgiev, Kaloyan – G34 1. c4 c5 2. Nf3 Nf6 3. Nc3 b6 4. e4 d6 5. d4 cxd4 6. Nxd4 Bb7 7. Qe2 e6 8. g3 Be7 9. Bg2 Nbd7 10. O-O Qc7
Turin ol (Men) 37th 2006 – Round 2 – Ghaem Maghami, Ehsan – 1/2-1/2 – Pantsulaia, Levan – G21 1. c4 c5 2. Nf3 Nf6 3. Nc3 b6 4. e3 Bb7 5. d4 cxd4 6. exd4 e6 7. a3 d6 8. d5 e5 9. Be2 Be7 10. O-O O-O
World Blitz 2021 – Round 6.58 – Anton Guijarro, David – 1-0 – Carlsson, Pontus – G367 1. Nf3 Nf6 2. c4 c5 3. Nc3 b6 4. e3 e6 5. d4 cxd4 6. exd4 Bb4 7. Bg5 h6 8. Bh4 O-O 9. Bd3 Bb7 10. O-O Bxc3
World Cup 1989 – Round 1 – Kasparov, Garry – 1-0 – Salov, Valery – G75 1. Nf3 Nf6 2. c4 b6 3. Nc3 c5 4. e4 d6 5. d4 cxd4 6. Nxd4 Bb7 7. Qe2 Nbd7 8. g3 Rc8 9. Bg2 a6 10. O-O Qc7

A34l — Symmetrical, 3 Knights (1929)

1.c4 c5 2.Nc3 Nf6 3.Nf3 b6

Les coups candidats

4.g3 — 49.5% (1808 parties)

Ambassadeurs : Rajkovic, Dusan (17x), Stangl, Markus (12x), Kudrin, Sergey (10x), Marinkovic, Ivan (10x), Janssen, Ruud (10x), Grooten, Herman (10x), Mannion, Stephen R (9x), Psakhis, Lev (8x)

4.e4 — 25.8% (945 parties)

Ambassadeurs : Kudrin, Sergey (12x), Gurevich, Dmitry (10x), Uhlmann, Wolfgang (10x), Yermolinsky, Alex (9x), Suba, Mihai (9x), Rajkovic, Dusan (9x), Stocek, Jiri (8x), Korchnoi, Viktor (7x)

4.d4 — 13.3% (486 parties)

Ambassadeurs : Gheorghiu, Florin (9x), Milanovic, Danilo (8x), Pogorelov, Ruslan (7x), Schlosser, Philipp (5x), Marinkovic, Ivan (5x), Horvath, Gyula (4x), Wojtkiewicz, Aleksander (4x), Psakhis, Lev (3x)

4.e3 — 10.7% (391 parties)

Ambassadeurs : Kudrin, Sergey (9x), Eingorn, Vereslav S (7x), Speelman, Jon S (6x), Chekhov, Valery A (4x), Frey Beckman, Kenneth (4x), Goldberg, Alexander, Dr. (4x), Rohde, Michael (4x), Arsovic, Zoran (4x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	4.g3	4.e4	4.d4	4.e3
<1800	91	53%	22%	13%	11%
1800-2200	857	58%	20%	12%	9%
2200-2600	2450	47%	27%	14%	11%
2600+	40	28%	42%	12%	18%

Évolution par décennie (% des parties)

Décennie	N parties	4.g3	4.e4	4.d4	4.e3
1950s	2	—	100%	—	—
1960s	2	—	50%	50%	—
1970s	107	41%	31%	10%	18%
1980s	514	41%	29%	16%	13%
1990s	734	51%	26%	13%	10%
2000s	1116	49%	26%	14%	10%
2010s	1017	55%	22%	13%	10%
2020s	164	43%	29%	11%	15%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
4.g3	55%	43%	▼ -12.4%
4.e4	22%	29%	▲ +7.3%
4.d4	13%	11%	▼ -1.8%
4.e3	10%	15%	▲ +5.7%

Joueurs célèbres

Champions du monde dans cette position

Tal, Mikhail — 7 parties
Kasparov, Garry — 4 parties
Kramnik, Vladimir — 4 parties
Hou, Yifan — 4 parties
Karpov, Anatoly — 3 parties
Smyslov, Vladimir — 1 partie
Botvinnik, Mikhail — 1 partie
Carlsen, Magnus — 1 partie

Parties historiques

4.g3 — 49.5% (1808 parties)

1970 — Busch, Raimund vs Ophoff, Rigobert — 1/2-1/2 — Moeller Werke
1974 — Octaviano, Patrick Matheus vs Illijin, Neboisa — 1/2-1/2 — Bucharest ROU
1974 — Schmidt, Wlodzimierz vs Lebredo Zaragoitia, Gerardo — 1/2-1/2 — Tbilisi GEO
1974 — Sznapik, Aleksander vs Rashkovsky, Nukhim N — 1/2-1/2 — Sochi RUS
1974 — Tal, Mikhail vs Ljubojevic, Ljubomir — 1/2-1/2 — Belgrade-Moscow

4.e4 — 25.8% (945 parties)

1955 — Miguel, Nahuel vs Reinhardt, Heinrich — 1-0 — Argentina
1959 — Cafferty, Bernard vs Hoad Philip Charles — 1/2-1/2 — ?
1960 — ? vs Berenstein, Alexander — 1-0 — Kiev UKR
1973 — Portisch, Lajos vs Ljubojevic, Ljubomir — 1/2-1/2 — Madrid ESP
1973 — Bosch van Rosenthal, Edzard vs Hartoch, Robert G — 1/2-1/2 — Leeuwarden ch-NED

4.d4 — 13.3% (486 parties)

1967 — Smyslov, Vladimir vs Botvinnik, Mikhail — 1/2-1/2 — Moscow RUS
1973 — Panno, Oscar vs Smyslov, Vasily — 1/2-1/2 — Petropolis BRA
1974 — Jansson, Borje vs Sanguinetti, Raul — 1/2-1/2 — Nice olm fin-A
1976 — Kaldor, Avraham vs Ungureanu, Emil — 1/2-1/2 — Netanya ISR
1976 — Robatsch, Karl vs Andersson, Ulf — 0-1 — Haifa ISR

4.e3 — 10.7% (391 parties)

1973 — Myyra, Markku vs Pajarinen, Sami — 0-1 — ?
1974 — Frey Beckman, Kenneth vs Campos Moreno, Javier B. — 1-0 — ?
1975 — Vadasz, Laszlo vs Ribli, Zoltan — 1/2-1/2 — HUN
1975 — Keene, Raymond D vs Andersson, Ulf — 1/2-1/2 — Rovinj-Zagreb
1976 — Vaganian, Rafael A vs Ornstein, Axel — 1/2-1/2 — Erevan ARM

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