Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	● c4, ● c7
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→g3, h2→g3	● b5→c4, f7→e6
Passés	—	—
Majorité	—	● aile dame 4v2

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● f4 (2v0), ● e5 (2v0), ● g5 (2v0)	● d5 (3v0)
Cases faibles	—	—
Centre	● d4 (2v1), ● e5 (2v0)	● d5 (3v0), ● e4 (1v0)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● c	● d

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bg2	● Bg2 Ok (mob. 2)
Bc8		● Bc8 Non développé (mob. 3)
Bf8		● Bf8 Non développé (mob. 5)
Paire de fous	● Oui	● Oui
Non développées	4 (● b1, ● 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	● d4-d5	● …c4-c3, ● …c7-c5, ● …e6-e5

E04d — Catalan: Open, 5.Nf3 b5

1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Nf3 b5 * ○ Trait aux Blancs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

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Plans. a4 (61 % des parties) ; Ne5 (Cavalier centralisé en e5 — 33 % des parties) ; O-O (Mettre le roi en sécurité, connecter les tours — 6 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

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Plans. ...c6 (Renforcer le centre — 62 % des parties) ; ...Nd5 (Cavalier centralisé en d5 — 29 % des parties) ; ...Bb7 (Fou actif (mobilité 6), Développer c8 — 6 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Partie
1946 Moscow RUS – Round 1 – Solntsev, Yury – 1-0 – Bonch-Osmolovsky, Mikhail – G9 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 b5 6. a4 c6 7. Ne5 Nd5 8. Nc3 f6 9. Ng4 b4 10. Nb1 a5
1954 Olympiad final A – Round 1 – Agustsson, Gudmundur – 1/2-1/2 – Darga, Klaus – G22 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 b5 6. a4 c6 7. Nc3 b4 8. Nb1 Nbd7 9. O-O Be7 10. Qc2 Ba6
1967 Moscow – Round 2.3 – Krogius, Nikolai V – 1/2-1/2 – Furman, Slavomir – G143 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Nf3 dxc4 5. Bg2 b5 6. a4 c6 7. O-O Bb7 8. Ne5 Qc8 9. b3 cxb3 10. Qxb3 b4
1967 USSR – Round ? – Krogius, Nikolai V – 1/2-1/2 – Furman, Semyon – G61 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Nf3 dxc4 5. Bg2 b5 6. a4 c6 7. O-O Bb7 8. Ne5 Qc8 9. b3 cxb3 10. Qxb3 b4
1971 Moscow – Round 3 – Lengyel, Laszlo – 0-1 – Karpov, Anatoly – G69 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 b5 6. Ne5 Nd5 7. O-O Bb7 8. e4 Nf6 9. Re1 Nbd7 10. Qe2 a6
1971 Moscow – Round 3 – Lengyel, Levente – 0-1 – Karpov, Anatoly – G70 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 b5 6. Ne5 Nd5 7. O-O Bb7 8. e4 Nf6 9. Re1 Nbd7 10. Qe2 a6
1973 Leningrad Interzonal – Round 1 – Tukmakov, Vladimir B – 0-1 – Korchnoi, Viktor – G43 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 b5 6. a4 c6 7. O-O Bb7 8. Ne5 a6 9. b3 cxb3 10. Bb2 Qb6
FIDE World Blitz Championship 2014 – Round 12.27 – Ragger, Markus – 0-1 – Morozevich, Alexander – G103 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 dxc4 5. Bg2 b5 6. Ne5 c6 7. b3 cxb3 8. axb3 Bb7 9. O-O Be7 10. Ba3 O-O
SportAccord Rapid Men 2012 – Round 2.5 – Giri, Anish – 1-0 – Morozevich, Alexander – G12 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 dxc4 5. Bg2 b5 6. a4 c6 7. Ne5 Nd5 8. O-O a6 9. axb5 cxb5 10. b3 cxb3
World Blitz 2018 – Round 12.29 – Bazeev, German – 1/2-1/2 – Riazantsev, Alexander – G712 1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. g3 dxc4 5. Bg2 b5 6. a4 Bb7 7. axb5 a6 8. bxa6 Nxa6 9. O-O Nb4 10. Rxa8 Qxa8
World Blitz 2023 – Round 1.14 – Kezin, Roman – 1/2-1/2 – Erigaisi Arjun – G11 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 dxc4 5. Bg2 b5 6. a4 c6 7. O-O a6 8. Ne5 Nd5 9. e4 Nb4 10. Nc3 Bb7

E04d — Open (1946)

1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Nf3 b5

Les coups candidats

6.a4 — 60.7% (205 parties)

Ambassadeurs : Rimkus, Bronius I (7x), Habes, Jiri (5x), Kiss, Attila (3x), Krogius, Nikolai V (2x), Herbrechtsmeier, Christof (2x), Kreie, Guenter (2x), Sosonko, Gennadi (2x), Lautier, Joel (2x)

6.Ne5 — 32.8% (111 parties)

Ambassadeurs : Timman, Jan H (3x), Oll, Lembit (3x), Kaganskiy, Gleb (3x), Karpov, Anatoly (2x), Polovodin, Igor A (2x), Mednis, Edmar J (2x), Rashkovsky, Nukhim N (2x), Alburt, Lev (2x)

6.O-O — 5.9% (20 parties)

Ambassadeurs : Summermatter, Daniel (2x), Bryson, Douglas M (2x), Cherniaev, Alexander (1x), Malaniuk, Vladimir P (1x), Honkanen, Lauko (1x), Mors, Pieter C M (1x), Ilincic, Zlatko (1x), Ninov, Nikolai (1x)

6.Nc3 — 0.3% (1 parties)

Ambassadeurs : Poppe, Mrs.Mia (1x), Mokrys Christian Peter (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	6.a4	6.Ne5	6.O-O	6.Nc3
<1800	4	100%	—	—	—
1800-2200	87	61%	29%	8%	1%
2200-2600	189	59%	35%	6%	—
2600+	8	75%	25%	—	—

Évolution par décennie (% des parties)

Décennie	N parties	6.a4	6.Ne5	6.O-O	6.Nc3
1950s	3	100%	—	—	—
1960s	2	100%	—	—	—
1970s	29	59%	41%	—	—
1980s	55	53%	44%	4%	—
1990s	43	60%	33%	5%	2%
2000s	58	60%	33%	5%	—
2010s	112	63%	28%	9%	—
2020s	36	61%	31%	8%	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
6.a4	63%	61%	▼ -2.3%
6.Ne5	28%	31%	▲ +2.9%
6.O-O	9%	8%	▼ -0.6%
6.Nc3	0%	0%	+0.0%

Joueurs célèbres

Champions du monde dans cette position

Karpov, Anatoly — 4 parties

Parties historiques

6.a4 — 60.7% (205 parties)

1951 — Kotkov, Yuri M vs Shukhovitsky — 1-0 — Odessa UKR
1952 — Lob, Chris vs Bogoljubov, Evgeniy — 0-1 — Belgrade SRB
1954 — Agustsson, Gudmundur vs Darga, Klaus — 1/2-1/2 — Amsterdam NED
1967 — Krogius, Nikolai V vs Fuhrman — 1/2-1/2 — corr
1967 — Krogius, Nikolai V vs Furman, Semyon — 1/2-1/2 — Moscow RUS

6.Ne5 — 32.8% (111 parties)

1971 — Lengyel, Laszlo vs Karpov, Anatoly — 0-1 — Moscow RUS
1971 — Lengyel, Levente vs Karpov, Anatoly — 0-1 — Moscow RUS
1972 — Kogan, Izrail vs Kudriashov, Anatoli — 0-1 — ?
1973 — Rashkovsky, Nukhim N vs Timman, Jan H — 0-1 — ?
1973 — Raskovski vs Timman, Jan H — 0-1 — Sotchi

6.O-O — 5.9% (20 parties)

1989 — Summermatter, Daniel vs Bryson, Douglas M — 0-1 — Haifa Ech-tt
1989 — Summermatter, Daniel vs Bryson, Douglas M — 0-1 — Haifa etc
1994 — Cherniaev, Alexander vs Malaniuk, Vladimir P — 1-0 — It (open), Hastings ENG
1997 — Honkanen, Lauko vs Mors, Pieter C M — 0-1 — ?
2003 — Ilincic, Zlatko vs Ninov, Nikolai — 0-1 — Belgrade SRB

6.Nc3 — 0.3% (1 parties)

1995 — Poppe, Mrs.Mia vs Mokrys Christian Peter — 1-0 — ?