Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→g3, h2→g3, c4→d5	● c7→d6, e7→d6, f7→g6, h7→g6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● d4 (2v1), ● f4 (2v0), ● b5 (2v0), ● g5 (2v0)	● e4 (2v1), ● g4 (2v0), ● e5 (2v1)
Cases faibles	—	● d5
Centre	● d4 (2v1), ● d5 (3v1)	● e4 (2v1), ● e5 (2v1)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bg2	● Bg2 Ok (mob. 2)
Bf5		● Bf5 Actif (mob. 9)
Bg7		● Bg7 Ok (mob. 2)
Paire de fous	● Oui	● Oui
Non développées	2 (● c1, ● a1)	1 (● a8)

Sécurité du roi

	♔ Blancs	♚ Noirs
Statut	● Roqué	● Roqué
Droits de roque	—	—

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	fermé
Ruptures	● c4-c5	● …e7-e6

E62q — King’s Indian: Fianchetto, Spassky, 8.d5

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nc6 7.O-O Bf5 8.d5 * ● Trait aux Noirs

Ouverture — Centre fermé

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plan principal. Centraliser les pièces (Nd4 dans 50 % des parties).

Atouts. Les Blancs s'appuient sur un contrôle dominant de d4, f4, b5 et g5.

En contrepartie. Plusieurs pièces dorment encore (le fou c1 et la tour a1).

Plans. Nd4 (Cavalier centralisé en d4 — 50 % des parties) ; Nd2 (50 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plan principal. Jeu au centre (rupture e7-e6).

Atouts. Les Noirs s'appuient sur un contrôle dominant de e4, g4 et e5 et un fou actif en f5.

Plans. ...Na5 (98 % des parties) ; ...Ne5 (Cavalier centralisé en e5 — 2 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Partie
1956 Leningrad ch-URS – Round 1 – Korchnoi, Viktor – 1/2-1/2 – Tolush, Alexander – G79 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. c4 d6 6. O-O Nc6 7. Nc3 Bf5 8. d5 Na5 9. Nd4 Bd7 10. b3 c5
1957 Reykjavik ol stud tt – Round ? – Portisch, Lajos – 1-0 – Kozma, Julius – G33 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. d4 O-O 5. c4 d6 6. Nc3 Nc6 7. O-O Bf5 8. d5 Na5 9. b3 c5 10. Bb2 a6
1962 Stockholm Interzonal – Round 14 – Cuellar Alpire, Mariana – 0-1 – Fischer, Raphael – G125 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nf3 d6 6. O-O Nc6 7. Nc3 Bf5 8. d5 Na5 9. Nd4 Bd7 10. Qd3 c5
1962 URS-ch30 sf – Round 12 – Kots, Yuri I – 1-0 – Lapienis, Donatas – G20 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 Bf5 8. d5 Na5 9. Nd2 Ne8 10. e4 Bd7
1964 Kiev ch-URS – Round 1 – Osnos, Viatcheslav – 1-0 – Vasiukov, Evgeni – G14 1. c4 g6 2. d4 Bg7 3. g3 Nf6 4. Bg2 O-O 5. Nf3 d6 6. O-O Nc6 7. Nc3 Bf5 8. d5 Na5 9. Nd2 c5 10. e4 Bd7
1964 Tel Aviv olm fin-A – Round 9 – Ivkov, Borislav – 0-1 – Garcia Rodriguez, Raimundo – G205 1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. d4 Nc6 7. Nc3 Bf5 8. d5 Na5 9. Nd4 Bd7 10. b3 c5
1964 Tel Aviv olm fin-C – Round 4 – Minaya, Juan – 1/2-1/2 – Westerinen, Heikki M.J. – G20 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 Bf5 8. d5 Na5 9. Nd2 c6 10. e4 Bg4
1965 Asztalos Memorial 8th – Round 1 – Flesch, Janos – 1-0 – Borisenko, Georgy K – G5 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. c4 Nc6 7. Nc3 Bf5 8. d5 Na5 9. Nd4 Bd7 10. b3 c5
1966 Helsinki – Round 9 – Osnos, Viatcheslav – 1/2-1/2 – Westerinen, Heikki M.J. – G41 1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. d4 Nc6 7. Nc3 Bf5 8. d5 Na5 9. Nd2 c6 10. e4 Bg4
1966 Hoogovens-B – Round 5 – Beni, Alfred – 0-1 – Westerinen, Heikki M.J. – G8 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. c4 Nc6 7. Nc3 Bf5 8. d5 Na5 9. Nd4 Bd7 10. b3 c6
1966 URS Team Ch – Round ? – Selezniev, V. – 0-1 – Murey, Jacob – G8 1. c4 g6 2. g3 Bg7 3. d4 Nf6 4. Bg2 O-O 5. Nc3 Nc6 6. Nf3 d6 7. O-O Bf5 8. d5 Na5 9. Nd4 Bd7 10. b3 c5
1967 Hoogovens-B – Round 7 – Marovic, Drazen – 1-0 – Westerinen, Heikki M.J. – G19 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nc6 7. O-O Bf5 8. d5 Na5 9. Nd2 c6 10. dxc6 bxc6
1967 Leningrad RUS – Round 1 – Cherepkov, Alexander V – 1-0 – Zeitlein, Michael – G4 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nc6 7. O-O Bf5 8. d5 Na5 9. Nd4 Bd7 10. b3 c5
1967 October Revolution 50 – Round 1 – Barcza, Gedeon – 0-1 – Gufeld, Eduard – G72 1. Nf3 g6 2. d4 Nf6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. c4 Nc6 7. Nc3 Bf5 8. d5 Na5 9. Nd4 Bd7 10. b3 c5
1967 October Revolution 50 – Round 1 – Shamkovich, Leonid – 1-0 – Westerinen, Heikki M.J. – G73 1. Nf3 Nf6 2. c4 d6 3. g3 g6 4. Bg2 Bg7 5. d4 O-O 6. Nc3 Nc6 7. O-O Bf5 8. d5 Na5 9. Nd2 c6 10. e4 Bg4
1967 October Revolution 50 – Round 1 – Udovcic, Mijo – 1-0 – Vladimirov, Boris T – G8 1. c4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. Nc3 Nc6 7. d4 Bf5 8. d5 Na5 9. Nd4 Bd7 10. b3 c5
1967 October Revolution 50 – Round 1 – Udovcic, Mijo – 1/2-1/2 – Westerinen, Heikki M.J. – G29 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 Bf5 8. d5 Na5 9. Nd4 Bd7 10. b3 c5
1967 Sofia tt – Round 5 – Skalkotas, Nikolaos – 0-1 – Pietzsch, Wolfgang – G73 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nf3 d6 6. O-O Nc6 7. Nc3 Bf5 8. d5 Na5 9. Nd2 c5 10. e4 Bd7
1967 Sousse Interzonal – Round 21 – Cuellar Alpire, Mariana – 0-1 – Stein, Leon Rico – G192 1. d4 g6 2. c4 Bg7 3. Nf3 Nf6 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 Bf5 8. d5 Na5 9. Nd4 Bd7 10. Qd3 c5
1967 URS Team Ch – Round 1 – Krogius, Nikolai V – 1/2-1/2 – Shagalovich, Abo – G23 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 Bf5 8. d5 Na5 9. Nd2 c6 10. e4 Bd7
1968 Alma Ata ch-URS – Round 15 – Podgaets, Mikhail – 1-0 – Zaitsev, Igor A – G131 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. g3 O-O 5. Bg2 d6 6. Nf3 Nc6 7. O-O Bf5 8. d5 Na5 9. Nd2 c5 10. e4 Bd7
1968 CSR Ch – Round 6 – Smejkal, Jan – 1-0 – Trapl, Jindrich – G46 1. c4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. d4 Nc6 7. O-O Bf5 8. d5 Na5 9. Nd4 Bd7 10. b3 c5
1968 Hungary – Round 1 – Liptay, Laszlo Dr. – 1/2-1/2 – Portisch, Lajos – G62 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nf3 d6 6. O-O Nc6 7. Nc3 Bf5 8. d5 Na5 9. Nd4 Bd7 10. b3 c5
1968 Wijk aan Zee II – Round 11 – Dunkelblum, Arthur – 0-1 – Marovic, Drazen – G42 1. c4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. d4 Nc6 7. Nc3 Bf5 8. d5 Na5 9. Nd2 c6 10. e4 Bg4
1969 WchT U26 fin-A 16th – Round 4.1 – Plachetka, Jan – 0-1 – Podgaets, Mikhail – G26 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. d4 d6 6. c4 Nc6 7. Nc3 Bf5 8. d5 Na5 9. Nd2 c5 10. e4 Bd7
4. World Blitz 2008 – Round 9 – Vaganian, Rafael A – 0-1 – Polgar, Judit – G59 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. c4 O-O 5. Bg2 d6 6. Nc3 Nc6 7. O-O Bf5 8. d5 Na5 9. Nd4 Bd7 10. b3 c5
7. World Team Championship 2010 – Round 7 – Esen Baatarsukh – 1-0 – Rodshtein, Maxim – G109 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 Bf5 8. d5 Na5 9. Nd4 Bd7 10. Qd3 Ng4
World Blitz 2023 – Round 2.29 – Gallego Alcaraz, Andres Felipe – 0-1 – Mamedov, Rauf – G106 1. d4 Nf6 2. Nf3 g6 3. c4 d6 4. Nc3 Bf5 5. g3 Bg7 6. Bg2 O-O 7. O-O Nc6 8. d5 Na5 9. b3 c5 10. Bb2 a6

E62q — Fianchetto, Spassky (1956)

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nc6 7.O-O Bf5 8.d5

Les coups candidats

8…Na5 — 96.9% (1418 parties)

Ambassadeurs : Westerinen, Heikki M.J. (13x), Hvenekilde, Jorgen (11x), Rasik, Vitezslav (8x), Szekely, Peter (7x), Grivas, Efstratios (7x), Podgaets, Mikhail (5x), Fedorowicz, John (5x), Murey, Jacob (5x)

8…Nb8 — 1.9% (28 parties)

Ambassadeurs : Xu, Jun (1x), Mencinger, Vojko (1x), Thiele, Heinz (1x), Schloetterer, Hermann (1x), Beck, Hartmuth (1x), Mittelberger, Peter (1x), Bastidas Rodriguez, Emilio (1x), Izquierdo, Patricio (1x)

8…Ne5 — 0.6% (9 parties)

Ambassadeurs : Vukic, Milan (1x), Masic, Ljubomir (1x), Danov, Vladimir (1x), Majorovas, Vitalijus (1x), Hatz, Alexander (1x), Rudolph, Anna (1x), Szamos, Alexander (1x), Cierny, Lubomir (1x)

8…Nb4 — 0.5% (8 parties)

Ambassadeurs : Quinn, Mark (1x), Slivinskas, Mindaugas (1x), Sleich, Jan (1x), Walek, Milan (1x), Lahner, Jakub (1x), Baier, Pavel (1x), Tiengo, Davide (1x), Maestri, Roberto (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	8…Na5	8…Nb8	8…Ne5	8…Nb4
<1800	39	87%	10%	3%	—
1800-2200	383	95%	3%	1%	1%
2200-2600	922	98%	1%	0%	0%
2600+	21	100%	—	—	—

Évolution par décennie (% des parties)

Décennie	N parties	8…Na5	8…Nb8	8…Ne5	8…Nb4
1950s	3	100%	—	—	—
1960s	41	98%	—	2%	—
1970s	30	100%	—	—	—
1980s	41	95%	2%	2%	—
1990s	152	95%	4%	—	1%
2000s	294	96%	2%	1%	1%
2010s	735	97%	2%	1%	0%
2020s	167	99%	1%	—	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
8…Na5	97%	99%	▲ +2.1%
8…Nb8	2%	1%	▼ -1.2%
8…Ne5	1%	0%	▼ -0.5%
8…Nb4	0%	0%	-0.4%

Joueurs célèbres

Champions du monde dans cette position

Karpov, Anatoly — 2 parties
Botvinnik, Mikhail — 1 partie
Ju, Wenjun — 1 partie

Parties historiques

8…Na5 — 96.9% (1418 parties)

1955 — Lebedev, Boris vs Borisenko, Georgy K — 0-1 — Riga LAT
1956 — Korchnoi, Viktor vs Alexander Tadala — 1/2-1/2 — Leningrad ch-URS
1957 — Portisch, Lajos vs Kozma, Julius — 1-0 — Reykjavik ol stud tt
1961 — Hoad, PC. vs Tarjan, G. — 1-0 — British ch
1962 — Cuellar, Mario Exequiel vs Fischer, Robert J — 0-1 — Stockholm izt

8…Nb8 — 1.9% (28 parties)

1987 — Xu, Jun vs Mencinger, Vojko — 1/2-1/2 — Portoroz / Ljubljana
1992 — Beck, Hartmuth vs Mittelberger, Peter — 0-1 — Hartberg Semifinale
1996 — Thiele, Heinz vs Schloetterer, Hermann — 1-0 — Bayern
1997 — Zanobini, A. vs Togni, Giampiero — 0-1 — Rome ITA
1998 — Bastidas Rodriguez, Emilio vs Izquierdo, Patricio — 1-0 — Latacunga

8…Ne5 — 0.6% (9 parties)

1969 — Vukic, Milan vs Masic, Ljubomir — 1/2-1/2 — Novi Travnik
1983 — Danov, Vladimir vs Majorovas, Vitalijus — 0-1 — Moscow RUS
2001 — Hatz, Alexander vs Rudolph, Anna — 1-0 — GER
2003 — Szamos, Alexander vs Cierny, Lubomir — 1/2-1/2 — Salgotarjan
2009 — Dobosz, Henryk vs Martaler, Jewgeni — 1-0 — Deizisau GER

8…Nb4 — 0.5% (8 parties)

1993 — Sleich, Jan vs Walek, Milan — 0-1 — Luhacovice CZE
1994 — Quinn, Mark vs Slivinskas, Mindaugas — 1-0 — Szeged HUN
2002 — Lahner, Jakub vs Baier, Pavel — 1-0 — Moravia
2006 — Stursa, Jan vs Cernik, Lukas — 0-1 — Czech Republic
2009 — Tiengo, Davide vs Maestri, Roberto — 1-0 — Udine

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