E64a — King’s Indian: Fianchetto, Yugoslav System

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 c5 ○ Trait aux Blancs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plans. O-O (Mettre le roi en sécurité, connecter les tours — 62 % des parties) ; d5 (Occuper le centre — 26 % des parties) ; dxc5 (Capture en c5, Frapper le centre adverse — 9 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plans. ...Nc6 (Développer b8 — 51 % des parties) ; ...e6 (Solidifier le centre, libérer le fou — 11 % des parties) ; ...Na6 (Développer b8 — 10 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→g3, h2→g3	● d6→c5, e7→d6, f7→g6, h7→g6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● f4 (2v0), ● b5 (2v0), ● d5 (2v1), ● g5 (2v0)	● g4 (2v0), ● f5 (2v0)
Cases faibles	—	—
Centre	● d4 (2v1), ● d5 (2v1), ● e5 (2v1)	—

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bg2	● Bg2 Ok (mob. 2)
Bg7		● Bg7 Ok (mob. 2)
Bc8		● Bc8 Non développé (mob. 5)
Paire de fous	● Oui	● Oui
Non développées	3 (● c1, ● a1, ● h1)	3 (● b8, ● c8, ● a8)

Sécurité du roi

	♔ Blancs	♚ Noirs
Statut	● Au centre	● Roqué
Droits de roque	O-O / O-O-O	—

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	mobile
Ruptures	—	● …d6-d5, ● …e7-e5

Partie
1954 Amsterdam olm – Round 1 – Palmason, Gudmundur – 1/2-1/2 – Barden, Leonard – G12 1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 O-O 5. d4 d6 6. Nf3 c5 7. h3 Nc6 8. Be3 b6 9. O-O Bd7 10. Qd2 Rb8
1954 URS Ch, semi final – Round 1 – Moiseev, Oleg – 1/2-1/2 – Vasiukov, Evgeni – G79 1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. d4 c5 7. e3 Nc6 8. O-O Bg4 9. h3 Bxf3 10. Bxf3 Nd7
1955 Ljubljana – Round 16 – Stahlberg, Gideon – 1/2-1/2 – Krivec Slavko – G143 1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. d4 d6 6. Nc3 c5 7. h3 Nc6 8. Be3 Bd7 9. Rc1 cxd4 10. Nxd4 Nxd4
1956 Moscow olm prel – Round 4 – Stahlberg, Gideon – 1/2-1/2 – Padevsky, Nikola – G120 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 c5 7. h3 Nc6 8. Be3 cxd4 9. Nxd4 Bd7 10. Qd2 Qc8
1957 Dublin zt – Round 16 – Van Scheltinga, Theo – 1/2-1/2 – Giustolisi, Alberto – G124 1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 O-O 5. d4 d6 6. Nf3 c5 7. h3 Nc6 8. Be3 cxd4 9. Nxd4 Bd7 10. Rc1 Qc8
1957 Mar del Plata – Round 12 – Kotov Lundqvist, Alex – 1-0 – Rubio Aguado, Fernando – G105 1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 O-O 5. d4 d6 6. Nf3 c5 7. Bd2 Nc6 8. d5 Na5 9. b3 a6 10. a4 Bd7
1959 BUL Ch Sofia BUL – Round 1 – Kolarov, Atanas Stefanov – 1-0 – Pantaleev, Dimitar Dimitrov – G4 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 d6 5. g3 O-O 6. Bg2 c5 7. h3 Nc6 8. Be3 cxd4 9. Nxd4 Bd7 10. Qd2 Qc8
1960 Leipzig olm fin-C – Round 11 – Angles d'Auriac, Bernard – 1-0 – Casa, Alex – G62 1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 O-O 5. Nf3 d6 6. d4 c5 7. e3 Nc6 8. O-O Bg4 9. h3 Bxf3 10. Bxf3 Nd7
1960 Madrid zt – Round 1 – Lehmann, Heinz – 1/2-1/2 – Penrose, Justin – G5 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 c5 7. h3 Nc6 8. dxc5 dxc5 9. Qxd8 Rxd8 10. Be3 Bf5
1961 Bled – Round 3 – Portisch, Lajos – 1/2-1/2 – Bertok, Mario Jr. – G35 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d6 5. Nf3 O-O 6. Nc3 c5 7. h3 Nc6 8. Be3 cxd4 9. Nxd4 Bd7 10. Rc1 Rc8
1965 Corr UDAPA – Round ? – Mallia Blas – 0-1 – Morgado, Juan Sebastian – G6 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 c5 7. e3 Nc6 8. O-O Ne8 9. Re1 Bg4 10. a3 cxd4

E64a — Fianchetto, Yugoslav System (1954)

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 c5

Les coups candidats

7.O-O — 62.2% (2642 parties) →

Ambassadeurs : Gligoric, Sofija (11x), Geller, Efim P. (8x), Byrne, Robert E (7x), Donner, Jan-Hein (6x), Korchnoi, Viktor (5x), Fancsy, Imre (5x), Wojtkiewicz, Aleksander (5x), Benko, Pal (4x)

7.d5 — 25.7% (1090 parties) →

Ambassadeurs : Miguel, Nahuel (12x), Gligoric, Sofija (8x), Donner, Jan-Hein (6x), Udovcic, Mijo (6x), Marovic, Drazen (6x), Stohl, Igor (5x), Stahlberg, Gideon (4x), Rapaka Samuel Paul (4x)

7.dxc5 — 9.4% (400 parties) →

Ambassadeurs : Porath, Yosef (4x), Udovcic, Mijo (3x), Bruno Pat (3x), Arkell, Keith C (3x), Gligoric, Sofija (2x), Bozic, Aleksandar (2x), Mecking, Henrique (2x), Seibold, Hubert, Dr. (2x)

7.e3 — 1.2% (49 parties)

Ambassadeurs : Christensen, Johannes M (1x), Jesso, Kurt (1x), Moiseev, Oleg (1x), Vasiukov, Evgeni (1x), Kristinsson, Sveinn (1x), Kolarov, Atanas Stefanov (1x), Mallia, Blas (1x), Morgado, Juan Sebastian (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	7.O-O	7.d5	7.dxc5	7.e3
<1800	240	51%	32%	11%	4%
1800-2200	1594	62%	26%	9%	1%
2200-2600	1642	65%	24%	10%	0%
2600+	51	63%	27%	10%	—

Évolution par décennie (% des parties)

Décennie	N parties	7.O-O	7.d5	7.dxc5	7.e3
1950s	166	43%	40%	10%	1%
1960s	166	55%	34%	7%	2%
1970s	116	75%	17%	6%	2%
1980s	199	68%	19%	10%	1%
1990s	714	71%	18%	9%	1%
2000s	829	67%	22%	8%	1%
2010s	1134	59%	29%	10%	1%
2020s	921	58%	29%	12%	1%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
7.O-O	59%	58%	▼ -1.2%
7.d5	29%	29%	▼ -0.7%
7.dxc5	10%	12%	▲ +1.8%
7.e3	1%	1%	▼ -0.9%

Joueurs célèbres

Champions du monde dans cette position

Ju, Wenjun — 5 parties
Carlsen, Magnus — 4 parties
Karpov, Anatoly — 2 parties
Tal, Mikhail — 1 partie
Botvinnik, Mikhail — 1 partie
Kasparov, Garry — 1 partie

Parties historiques

7.O-O — 62.2% (2642 parties)

1950 — Salm, Maxwell vs Brown, Walker Blake — 1-0 — Queensland ch
1951 — Bahro, Tom vs Matanovic, Aleksandar — 1/2-1/2 — Sarajevo BIH
1951 — Kozomara, Vlado vs Fuderer, Andrija — 1-0 — Ljubljana ch YUG
1951 — Bajec, Ivo vs Fuderer, Andrija — 0-1 — Sarajevo BIH
1952 — GIDEON SUNDAY vs Szabo, Laszlo — 0-1 — Saltsjobaden SWE

7.d5 — 25.7% (1090 parties)

1951 — Brandenberg, Karl Heinz vs Fuderer, Andrija — 0-1 — Match FRG-YUG
1952 — Platz, Hans vs Trifunovic, Petar — 1-0 — Helsinki olm
1952 — Gruenfeld, Ernst vs Rabar, Braslav — 1/2-1/2 — Vienna 5253 Vienna AUT
1952 — Cruz, Walter vs Rabar, Braslav — 0-1 — Rio de Janeiro BRA
1952 — Kotov, Alexander vs Gligoric, Svetozar — 1-0 — Stockholm izt

7.dxc5 — 9.4% (400 parties)

1951 — Stoltz, Gosta vs Fuderer, Andrija — 1/2-1/2 — It Dortmund GER
1952 — Eken, Max vs Alex Crisovan — 1-0 — Zurich SUI
1952 — Bozic, Aleksandar vs Nedeljkovic, Srecko M — 1-0 — Belgrade SRB
1952 — Bozic, Aleksandar vs Udovcic, Mijo — 1/2-1/2 — Belgrade SRB
1953 — Ojanen, Kaarle S vs Rossetto, Hector — 0-1 — Mar del Plata ARG

7.e3 — 1.2% (49 parties)

1954 — Moiseev, Oleg vs Vasiukov, Evgeni — 1/2-1/2 — Erevan ARM
1955 — Kristinsson, Sveinn vs Kolarov, Atanas Stefanov — 1/2-1/2 — Lyon FRA
1960 — Angles d'Auriac, Bernard vs Casa, Alex — 1-0 — Leipzig GER
1962 — Christensen, Johannes M vs Jesso, Kurt — 1-0 — ?
1965 — Mallia, Blas vs Morgado, Juan Sebastian — 0-1 — cr UDAPA