A49d — Neo-King’s Indian: Fianchetto System

1.d4 Nf6 2.Nf3 g6 3.g3 Bg7 4.Bg2 O-O * ○ Trait aux Blancs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Avantages : case forte d4, case forte f4, case forte e5, case forte g5, paire de fous.
Faiblesses adverses : Bg7 enfermé, Bc8 enfermé.
Problèmes : roi au centre, Bc1 enfermé, Bg2 enfermé, 4 pièces non développées (B1, C1, A1, H1).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● Nbd2 — Développer Nb1
● Bg5 — Clouer Nf6
● h3 — Empêcher ...Bg4

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Avantages : paire de fous.
Faiblesses adverses : Bc1 enfermé, Bg2 enfermé, roi blanc au centre.
Problèmes : Bg7 enfermé, Bc8 enfermé, 3 pièces non développées (B8, C8, A8).
Plans :
● ...d6 — Libérer Bc8
● ...Nc6 — Développer Nb8
● ...Bg4 — Clouer Nf3
● ...c5 — Rupture
● ...d5 — Rupture

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

A49d — Fianchetto System

1.d4 Nf6 2.Nf3 g6 3.g3 Bg7 4.Bg2 O-O

Eval: [+0.15]

Les coups candidats

5.O-O — 83.1% (24750 parties) →

Ambassadeurs : Kurajica, Bojan (139x), Romanishin, Oleg M (75x), Eckhardt, Claudia (50x), Pert, Nicholas (47x), Jirovsky, Pavel (41x), Marsalek, Zdenek (41x), Stefanova, Antoaneta (41x), Csulits, Anton (38x)

5.c4 — 15.5% (4618 parties) →

Ambassadeurs : Romanishin, Oleg M (86x), Dornbusch, Tatiana (42x), Konopka, Michal (28x), Trickov, Vasil (23x), Nikolic, Predrag (23x), Mozny, Milos (23x), Bagaturov, Giorgi (20x), Kekki, Jorma (18x)

5.b3 — 0.7% (220 parties)

Ambassadeurs : Benito Alba, Eladio (5x), Orbaan, Constant (3x), Gyorkos, Lajos (3x), Pilat, Fabian (3x), Rodic, Ivana (2x), Dreyer, Kurt (2x), Shereshevski, Mikhail (2x), Mariotti, Sergio (2x)

5.Nbd2 — 0.2% (62 parties)

Ambassadeurs : Ulvestad, Olaf (2x), Kemppinen, Juha (2x), Chambers, Colin R (2x), Baltin, Ildar (2x), Flockerzi, Armin (2x), Reshevsky, Samuel (1x), Canepa, Jose (1x), Toran Albero, Roman (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	5.O-O	5.c4	5.b3	5.Nbd2
<1800	668	83%	14%	1%	0%
1800-2200	10421	83%	15%	1%	0%
2200-2600	14056	83%	16%	1%	0%
2600+	362	81%	19%	0%	—

Évolution par décennie (% des parties)

Décennie	N parties	5.O-O	5.c4	5.b3	5.Nbd2
1870s	1	100%	—	—	—
1920s	19	89%	11%	—	—
1930s	42	83%	14%	—	2%
1940s	65	77%	22%	—	—
1950s	372	80%	16%	3%	0%
1960s	472	85%	14%	1%	0%
1970s	620	85%	14%	1%	—
1980s	1345	81%	18%	0%	0%
1990s	6058	83%	16%	1%	0%
2000s	7618	82%	16%	1%	0%
2010s	10462	84%	15%	1%	0%
2020s	2701	86%	13%	1%	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
5.O-O	84%	86%	▲ +1.8%
5.c4	15%	13%	▼ -1.5%
5.b3	1%	1%	+0.1%
5.Nbd2	0%	0%	-0.2%

Joueurs célèbres

Champions du monde dans cette position

Smyslov, Vladimir — 10 parties
Kasparov, Garry — 10 parties
Karpov, Anatoly — 10 parties
Ju, Wenjun — 10 parties
Kramnik, Vladimir — 7 parties
Karpov, Aleksandr — 6 parties
Carlsen, Magnus — 6 parties
Gukesh D — 6 parties
Tal, Mikhail — 5 parties
Ding, Liren — 5 parties
Euwe, Max — 4 parties
Alekhine, Alexander — 1 partie
Steinitz, Wilhelm — 1 partie
Anand, Viswanathan — 1 partie

Parties historiques

5.O-O — 83.1% (24750 parties)

1871 — Jankovec, Ivan vs Liebert, Heinz — 1-0 — Havirov CZE
1922 — Norman, George vs Conde, Adrian G — 1-0 — Hastings ENG
1922 — Johner, Paul vs Reti, Richard — 1-0 — Teplitz-Schoenau GER
1923 — Norman, George vs Garcia Conde, Adrian — 1-0 — Hastings Town Hall
1923 — Selezniev, Alexey vs Euwe, Max — 1-0 — Maehrisch Ostrau

5.c4 — 15.5% (4618 parties)

1926 — Monticelli, Mario vs Yates, Frederic D — 1-0 — Budapest HUN
1928 — Monticelli, Mario vs Weenink, Henri — 1/2-1/2 — The Hague NED
1931 — Takacs, Adonis vs Tartakower, Savielly — 0-1 — Rotterdam NED
1931 — Wolk, Sigmund vs Weiss, Adam — 1-0 — Ebersberg
1933 — Walter, Jacques vs Kaspar, Karel — 1-0 — ?

5.b3 — 0.7% (220 parties)

1956 — Kortchnoi, V. vs Spassky, B. — 1-0 — Leningrad ch-URS
1956 — Socias Porcel, Francisco J vs Albareda, Miguel — 0-1 — Barcelona ESP
1956 — Neishtadt, Yakov vs Bronstein, David I — 1-0 — Moscow RUS
1957 — Orbaan, Constant vs Doda, Zbigniew — 0-1 — Szczawno Zdroj
1957 — Orbaan, Constant vs Spanjaard, Eduard — 0-1 — Amsterdam NED

5.Nbd2 — 0.2% (62 parties)

1939 — Ulvestad, Olaf vs Reshevsky, Samuel — 0-1 — New York, NY USA
1951 — Canepa, Jose vs Toran Albero, Roman — 1/2-1/2 — San Rafael
1966 — Ulvestad, Olaf vs Durao, Joaquim — 1/2-1/2 — Malaga Malaga ESP
1982 — Laurin, Marcel vs Veltmann, Martin — 1-0 — Ottawa CAN
1985 — Duncan, Rafi vs Bachmayer, C. — 1-0 — Westland SE MI opB

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

Cases

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

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bg2	● Bg2 Enfermé (mob. 2)
Bg7		● Bg7 Enfermé (mob. 2)
Bc8		● Bc8 Non développé (mob. 0)
Paire de fous	● Oui	● Oui
Non développées	4 (b1, 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	semi-ouvert
Ruptures	● c2-c3, ● d4-d5, ● e2-e3	● …c7-c6, ● …c7-c5, ● …d7-d6, ● …d7-d5, ● …e7-e6, ● …e7-e5

Partie
1939 New York ch-ACF – Round 1 – Ulvestad, Olaf – 0-1 – Reshevsky, Samuel – G6 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. Nbd2 d6 6. c3 Nc6 7. Nc4 e6 8. Bf4 b5 9. Na3 Rb8 10. Nc2 Qe7
1941 Mar del Plata – Round 1 – Graf, Sascha – 1/2-1/2 – Iliesco, Juan – G14 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. Kf1 d6 6. c4 Bg4 7. Nc3 Nc6 8. Be3 Nd7 9. Qd2 Bxf3 10. Bxf3 e5
1950 GDR Ch – Round 7 – Hunte, Hugo – 1-0 – Schlieder, Rolf – G12 1. Nf3 Nf6 2. d4 g6 3. g3 Bg7 4. Bg2 O-O 5. c3 d6 6. O-O Nbd7 7. Nbd2 e5 8. e3 Nh5 9. Ne1 Qe7 10. Nd3 c6
1956 Leningrad ch-URS – Round 1 – Kortchnoi, V. – 1-0 – Spassky, B. – G78 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. b3 d6 6. Bb2 e5 7. dxe5 Ng4 8. O-O Nxe5 9. Nxe5 dxe5 10. Nc3 Nd7
1956 Moscow Ch – Round ? – Neishtadt, Yakov – 1-0 – Bronstein, David I – G10 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. b3 c5 6. Bb2 cxd4 7. Nxd4 d5 8. O-O e5 9. Nf3 e4 10. Nd4 e3
1957 Przepiorka Memorial – Round 10 – Orbaan, Constant – 0-1 – Doda, Zbigniew – G62 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. b3 d6 6. Bb2 Bg4 7. Nbd2 Qc8 8. h3 Bxf3 9. Nxf3 a5 10. O-O a4
1957 Wageningen zt – Round 14 – Orbaan, Constant – 1-0 – Lindblom, Peter – G65 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. d4 O-O 5. b3 c5 6. Bb2 Ne4 7. O-O d5 8. e3 Nc6 9. Nbd2 Bf5 10. Ne5 Nxd2
1960 GBR Ch 47th – Round 2.5 – Naylor, John William – 0-1 – Penrose, Jonathan – G17 1. Nf3 g6 2. d4 Nf6 3. g3 Bg7 4. Bg2 O-O 5. b3 c5 6. Bb2 cxd4 7. O-O d5 8. Bxd4 Nc6 9. Bb2 Qb6 10. Nbd2 Rd8
1966 La Habana olm prel – Round 2 – Dreyer, Kurt – 1/2-1/2 – Mazzoni, Guy – G32 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. b3 d6 6. Bb2 e5 7. dxe5 Ng4 8. O-O Nc6 9. c4 Ngxe5 10. Nxe5 Nxe5
1966 Malaga Malaga ESP – Round 3 – Ulvestad, Olaf – 1/2-1/2 – Durao, Joaquim – G3 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. Nbd2 d5 6. c4 c6 7. b3 Bf5 8. Bb2 Qa5 9. O-O Ne4 10. a3 Bh6