Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→g3, h2→g3	● d6→c5, b7→a6, f7→g6, h7→g6
Passés	—	—
Majorité	—	● aile dame 3v2

Cases

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

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● c	● e

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	2 (● c1, ● a1)	3 (● b8, ● c8, ● a8)

Sécurité du roi

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

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	fermé

A62c — Benoni: Fianchetto, 9.O-O a6

1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 Bg7 8.Bg2 O-O 9.O-O a6 * ○ Trait aux Blancs

Ouverture — Centre fermé

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plans. a4 (99 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plans. ...Nbd7 (Développer b8 — 53 % des parties) ; ...Re8 (Tour sur colonne semi-ouverte e — 42 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Partie
1953 Milan 2nd – Round 1 – Ulvestad, Olaf – 0-1 – Kottnauer, Cenek – G1 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. Nc3 c5 7. d5 e6 8. O-O exd5 9. cxd5 a6 10. a4 Re8
1954 Prague zt – Round 10 – Uhlmann, Wolfgang – 1/2-1/2 – Kluger, Gyula – G53 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. g3 Bg7 8. Bg2 O-O 9. O-O a6 10. a4 Re8
1954 Prague zt Prague CZE – Round 19 – Sliwa, Bogdan – 1-0 – Kluger, Gyula – G63 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. g3 Bg7 8. Bg2 O-O 9. O-O a6 10. a4 Bg4
1957 URS Ch, semi final – Round 18 – Kaminsky, Oleg – 0-1 – Korchnoi, Viktor – G167 1. d4 c5 2. d5 Nf6 3. c4 e6 4. Nc3 exd5 5. cxd5 d6 6. g3 g6 7. Bg2 Bg7 8. Nf3 O-O 9. O-O a6 10. a4 Re8
1959 CSR Ch – Round 2 – Olexa, Vilem – 0-1 – Kozma, Julius – G12 1. d4 Nf6 2. c4 e6 3. g3 c5 4. d5 exd5 5. cxd5 d6 6. Bg2 g6 7. Nf3 Bg7 8. O-O O-O 9. Nc3 a6 10. a4 Re8
1962 Hastings II – Round 5 – Wood, Beau – 1-0 – Baretic, Dragoljub – G12 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. g3 g6 7. Bg2 Bg7 8. Nf3 O-O 9. O-O a6 10. a4 b6
1963 Budapest ch-HUN – Round 1 – Barczay, Laszlo – 1/2-1/2 – Lengyel, Laszlo – G82 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. g3 Bg7 8. Bg2 O-O 9. O-O a6 10. a4 Re8
World Blitz 2007 – Round 37 – Mamedyarov, Shakhriyar – 1-0 – Savchenko, Boris – G363 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 c5 5. d5 d6 6. Nc3 O-O 7. Bg2 e6 8. O-O exd5 9. cxd5 a6 10. a4 Bg4
World Blitz 2017 – Round 1.43 – Li, Chao – 1-0 – Abdyzhapar, Asylbek – G36 1. d4 Nf6 2. c4 e6 3. g3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bg2 Bg7 8. Nf3 O-O 9. O-O a6 10. a4 Re8
World Blitz 2017 – Round 14.3 – Ding, Liren – 1/2-1/2 – Vachier-Lagrave, Maxime – G732 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 c5 6. d5 d6 7. Nc3 e6 8. O-O exd5 9. cxd5 a6 10. a4 Re8

A62c — Fianchetto (1953)

1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 Bg7 8.Bg2 O-O 9.O-O a6

Les coups candidats

10.a4 — 98.9% (4041 parties)

Ambassadeurs : Ligterink, Gert (15x), Drasko, Milan (15x), Cebalo, Miso (14x), Tal, Mikhail (13x), Franco Ocampos, Zenon (13x), Birnboim, Nathan (12x), Marovic, Drazen (11x), Hausner, Ivan (10x)

10.e4 — 0.4% (15 parties)

Ambassadeurs : Enklaar, Bertus Franz (1x), Ligterink, Gert (1x), Fernandez Giuntoli, Luis Rolando (1x), Szlos, Leonardo (1x), Laux, Tino, Dr. (1x), Theel, Thomas (1x), Maibaum, Ludwig, Dr. (1x), Erker, Egon, Dr. (1x)

10.Bf4 — 0.2% (9 parties)

Ambassadeurs : Senekovic, Marjan (1x), Vujacic, Borivoje (1x), Andreyuk, Gordey Vit (1x), Parkanyi, Attila (1x), Knoeppel, Peter Otto (1x), Gretencord, Ulrich (1x), Zwaneveld, Ansel (1x), Iglesias, Manuel (1x)

10.a3 — 0.1% (5 parties)

Ambassadeurs : Zwaneveld, Ansel (1x), Kwik, Tongsoen (1x), Kudlacek, Jaroslav (1x), Rozsypal, Filip (1x), Bosboom, Manuel (1x), Spoelman, Wouter (1x), Chan, Leong Sing (1x), Harvey, Donald J (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	10.a4	10.e4	10.Bf4	10.a3
<1800	121	98%	—	1%	1%
1800-2200	1349	99%	1%	0%	0%
2200-2600	2202	100%	0%	—	0%
2600+	49	100%	—	—	—

Évolution par décennie (% des parties)

Décennie	N parties	10.a4	10.e4	10.Bf4	10.a3
1950s	34	100%	—	—	—
1960s	57	98%	—	2%	—
1970s	150	98%	1%	—	—
1980s	344	99%	1%	—	—
1990s	572	99%	1%	0%	—
2000s	927	98%	0%	0%	0%
2010s	1710	99%	0%	0%	0%
2020s	291	100%	—	—	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
10.a4	99%	100%	+0.5%
10.e4	0%	0%	-0.3%
10.Bf4	0%	0%	-0.2%
10.a3	0%	0%	-0.1%

Joueurs célèbres

Champions du monde dans cette position

Tal, Mikhail — 10 parties
Ju, Wenjun — 5 parties
Kasparov, Garry — 2 parties
Karpov, Anatoly — 2 parties
Carlsen, Magnus — 1 partie
Hou, Yifan — 1 partie
Anand, Viswanathan — 1 partie
Ding, Liren — 1 partie
Gukesh D — 1 partie

Parties historiques

10.a4 — 98.9% (4041 parties)

1953 — Eken, Max vs Kotov, Alexander — 1-0 — Zurich SUI
1953 — Bolbochan, Jacobo vs Maderna, Carlos — 0-1 — Buenos Aires ARG
1953 — Ulvestad, Olaf vs Kottnauer, Cenek — 0-1 — Milan ITA
1954 — Donner, Jan-Hein vs Filip, Miroslav — 0-1 — Amsterdam olm
1954 — Smyslov, Vasily vs Pachman, Ludek — 1/2-1/2 — Amsterdam NED

10.e4 — 0.4% (15 parties)

1974 — Fernandez Giuntoli, Luis Rolando vs Szlos, Leonardo — 0-1 — Pinamar ARG
1977 — Enklaar, Bertus Franz vs Ligterink, Gert — 0-1 — Nederland tt
1988 — Laux, Tino, Dr. vs Theel, Thomas — 0-1 — GER
1988 — Maibaum, Ludwig, Dr. vs Erker, Egon, Dr. — 0-1 — Dortmund open
1997 — Comp Fritz vs Comp M-Chess Pro — 0-1 — Debrecen HUN

10.Bf4 — 0.2% (9 parties)

1969 — Senekovic, Marjan vs Vujacic, Borivoje — 0-1 — Pula CRO
1992 — Andreyuk, Gordey Vit vs Parkanyi, Attila — 0-1 — Gyongyos
2001 — Knoeppel, Peter Otto vs Gretencord, Ulrich — 0-1 — ?
2002 — Zwaneveld, Ansel vs Iglesias, Manuel — 0-1 — IECG
2007 — Carlson, Lars H vs Collett, John — 1/2-1/2 — ICCF

10.a3 — 0.1% (5 parties)

2002 — Zwaneveld, Ansel vs Kwik, Tongsoen — 0-1 — IECG
2003 — Kudlacek, Jaroslav vs Rozsypal, Filip — 0-1 — Klatovy CZE
2007 — Bosboom, Manuel vs Spoelman, Wouter — 1/2-1/2 — Hilversum NED
2010 — Chan, Leong Sing vs Harvey, Donald J — 0-1 — ICCF
2012 — Ortegon, Andres Felipe vs Quintero, Raul — 0-1 — Bogota COL