A30u — English: Symmetrical, Hedgehog, 8.Qxd4 d6

1.c4 c5 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.d4 cxd4 8.Qxd4 d6 * ○ Trait aux Blancs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Avantages : majorité aile_dame (3v2), case forte f4, case forte b5, case forte g5, paire de fous, colonne d.
Faiblesses adverses : Be7 enfermé, roi noir au centre.
Problèmes : Bc1 enfermé, Bg2 enfermé.
Plans :
● Bg5 — Clouer Nf6
● h3 — Empêcher ...Bg4
● Rd — Tour sur colonne d

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Avantages : majorité centre (2v1), case forte c5, Bb7 actif, paire de fous, colonne c.
Faiblesses adverses : Bc1 enfermé, Bg2 enfermé.
Problèmes : roi au centre, Be7 enfermé, 3 pièces non développées (B8, A8, H8).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● ...Nbd7 — Développer Nb8
● ...Bg4 — Clouer Nf3
● ...d5 — Rupture
● ...e5 — Rupture

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

A30u — Symmetrical Hedgehog

1.c4 c5 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.d4 cxd4 8.Qxd4 d6

Eval: [+0.29]

Les coups candidats

9.Rd1 — 42.4% (1877 parties) →

Ambassadeurs : Ftacnik, Lubomir (33x), Ribli, Zoltan (16x), Jurek, Josef (14x), Browne, Walter Shawn (12x), Seirawan, Yasser (12x), Csom, Istvan (12x), Adorjan, Andras (10x), Robatsch, Karl (9x)

9.Bg5 — 29.6% (1309 parties)

Ambassadeurs : Ftacnik, Lubomir (24x), Browne, Walter Shawn (15x), Greenfeld, Alon (12x), Konopka, Michal (9x), Jurek, Josef (9x), Andersson, Ulf (8x), Ribli, Zoltan (8x), Drasko, Milan (7x)

9.b3 — 21.9% (967 parties) →

Ambassadeurs : Uhlmann, Wolfgang (13x), Browne, Walter Shawn (10x), Yermolinsky, Alex (10x), Ftacnik, Lubomir (10x), Szmetan, Jorge (9x), Greenfeld, Alon (9x), Andersson, Ulf (8x), Jurek, Josef (8x)

9.e4 — 5.6% (248 parties)

Ambassadeurs : Uhlmann, Wolfgang (28x), Gheorghiu, Florin (6x), Burmeister, Ferdinand (6x), Jansa, Vlastimil (3x), Vilela De Acuna, Jose Luis (3x), Stempin, Pawel (3x), Thompson, Brian (3x), Ribli, Zoltan (2x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	9.Rd1	9.Bg5	9.b3	9.e4
<1800	33	42%	24%	30%	3%
1800-2200	836	42%	29%	21%	8%
2200-2600	2989	44%	30%	21%	5%
2600+	148	34%	40%	22%	3%

Évolution par décennie (% des parties)

Décennie	N parties	9.Rd1	9.Bg5	9.b3	9.e4
1970s	151	42%	1%	43%	14%
1980s	750	45%	22%	25%	8%
1990s	650	40%	19%	35%	6%
2000s	1178	43%	31%	21%	4%
2010s	1451	41%	41%	13%	4%
2020s	244	46%	23%	18%	12%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
9.Rd1	41%	46%	▲ +5.6%
9.Bg5	41%	23%	▼ -18.9%
9.b3	13%	18%	▲ +5.1%
9.e4	4%	12%	▲ +8.4%

Joueurs célèbres

Champions du monde dans cette position

Kasparov, Garry — 8 parties
Karpov, Aleksandr — 8 parties
Karpov, Anatoly — 6 parties
Kramnik, Vladimir — 6 parties
Carlsen, Magnus — 5 parties
Tal, Mikhail — 4 parties
Smyslov, Vladimir — 3 parties
Anand, Viswanathan — 2 parties
Hou, Yifan — 2 parties
Botvinnik, Mikhail — 1 partie

Parties historiques

9.Rd1 — 42.4% (1877 parties)

1975 — Uhlmann, Wolfgang vs Gheorghiu, Florin — 1/2-1/2 — Amsterdam NED
1975 — Kovacs, Laszlo M vs Garcia Martinez, Silvino — 1/2-1/2 — Polanica Zdroj POL
1975 — Schmidt, Wlodzimierz vs Ornstein, Axel — 1-0 — Stockholm SWE
1975 — Doda, Zbigniew vs Ekstroem, Roland — 1-0 — Stockholm SWE
1975 — Schmidt, Waldemar vs Rogoff, Kenneth — 0-1 — Polanica Zdroj POL

9.Bg5 — 29.6% (1309 parties)

1975 — Grigorian, Levon vs Karpov, Anatoly — 0-1 — Riga LAT
1981 — Soos, Bela vs Csom, Istvan — 1/2-1/2 — Wiesbaden GER
1981 — Neamtu, Serban-Constantin vs Illijin, Neboisa — 1-0 — ?
1981 — Karpov, Anatoly vs Kasparov, Garry — 1/2-1/2 — Moscow RUS
1981 — Olafsson, Helgi vs Hjartarson, Johann — 1/2-1/2 — Icelandic Chess Cham

9.b3 — 21.9% (967 parties)

1975 — Uhlmann, Wolfgang vs Jansa, Vlastimil — 1/2-1/2 — Hastings ENG
1975 — Uhlmann, Wolfgang vs Jansa, Vlastimil — 1/2-1/2 — Leipzig GER
1975 — Uhlmann, Wolfgang vs Rogoff, Kenneth — 1/2-1/2 — Polancia Zdroj
1975 — Uhlmann, Wolfgang vs Jansa, Vlastimil — 1/2-1/2 — Leipzig GER
1975 — Schmidt, Waldemar vs Abad Garcia, Santiago — 1/2-1/2 — Polanica Zdroj POL

9.e4 — 5.6% (248 parties)

1975 — Cserna, Laszlo vs Portisch, Lajos — 0-1 — ?
1976 — Uhlmann, Wolfgang vs Rodriguez Cespedes, Amador — 1-0 — Halle GER
1976 — Uhlmann, Wolfgang vs Gheorghiu, Florin — 0-1 — Manila PHI
1976 — Uhlmann, Wolfgang vs Boensch, Uwe — 0-1 — Halle GER
1976 — Uhlmann, Wolfgang vs Cortes Gheorghiu, Christian — 0-1 — Manila ItZ

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→g3, h2→g3	● a7→b6, f7→e6
Passés	—	—
Majorité	● aile_dame 3v2	● centre 2v1

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● f4 (3v0), ● b5 (2v0), ● g5 (2v0)	● c5 (2v1)
Cases faibles	● e4	—
Centre	● d4 (1v0), ● e5 (2v1)	—

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● d	● c

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bg2	● Bg2 Enfermé (mob. 2)
Bb7		● Bb7 Actif (mob. 6)
Be7		● Be7 Enfermé (mob. 1)
Paire de fous	● Oui	● Oui
Non développées	2 (c1, a1)	3 (b8, a8, h8)

Sécurité du roi

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

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	semi-ouvert
Ruptures	● c4-c5, ● e2-e3	● …d6-d5, ● …e6-e5

Partie
1975 URS Team Ch – Round 1 – Grigorian, Levon Ashotovich – 0-1 – Karpov, Anatoly – G9 1. c4 c5 2. Nf3 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 d6 9. Bg5 a6 10. Bxf6 Bxf6
36. Olympiad 2004 – Round 7 – Dizdarevic, Emir – 0-1 – Graf, Adrian – G260 1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. c4 c5 5. O-O e6 6. d4 cxd4 7. Qxd4 Be7 8. Nc3 d6 9. Bg5 a6 10. Bxf6 Bxf6
74. Tata Steel GMA 2012 – Round 1 – Carlsen, Magnus – 1-0 – Gashimov, Vugar – G7 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 d6 9. Bg5 a6 10. Bxf6 Bxf6
Amber-rapid 7th 1998 – Round 9 – Kramnik, Vladimir – 1-0 – Ljubojevic, Ljubomir – G41 1. Nf3 c5 2. c4 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 d6 9. Bg5 a6 10. Bxf6 Bxf6
ARM-ROW Match 2004 – Round 4 – Kasparov, Garry – 1/2-1/2 – Adams, Michael – G24 1. Nf3 Nf6 2. c4 e6 3. Nc3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 d6 9. Bg5 a6 10. Bxf6 Bxf6
Brasilia 1981 – Round 1 – Andersson, Ulf 1949 – 0-1 – Browne, Walter Shawn – G13 1. Nf3 c5 2. c4 Nf6 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 d6 9. Bg5 a6 10. Bxf6 Bxf6
Bugojno 1982 – Round 1 – Huebner, Robert – 1/2-1/2 – Ljubojevic, Ljubomir – G55 1. Nf3 c5 2. c4 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 d6 9. Bg5 a6 10. Bxf6 Bxf6
Bugojno 1982 – Round 1 – Kavalek, Lubomir – 1/2-1/2 – Polugaevsky, Lev – G5 1. c4 e6 2. Nc3 c5 3. Nf3 Nf6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 d6 9. Bg5 a6 10. Bxf6 Bxf6
Candidats Tournament 1985 – Round 12 – Smyslov, Vassily – 1/2-1/2 – Short, Nigel D – G72 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 d6 9. Bg5 a6 10. Bxf6 Bxf6
FIDE World Cup 2015 – Round 2.1 – Rodshtein, Maxim – 0-1 – Ivanchuk, Vasyl – G228 1. Nf3 c5 2. c4 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 d6 9. Bg5 a6 10. Rfd1 Nbd7
FIDE World Rapid Championship 2014 – Round 14.13 – Meier, Georg – 1-0 – Malakhov, Vladimir – G68 1. Nf3 c5 2. c4 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 d6 9. Bg5 a6 10. Bxf6 Bxf6
Hoogovens 1998 – Round 2 – Karpov, Anatoly – 1/2-1/2 – Adams, Mariam – G10 1. Nf3 Nf6 2. c4 e6 3. Nc3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 d6 9. e4 O-O 10. Qe3 Nbd7
Interpolis 1982 – Round 1 – Andersson, Ulf 1949 – 1-0 – Browne, Walter Shawn – G43 1. Nf3 c5 2. c4 Nf6 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 d6 9. Bg5 a6 10. Bxf6 Bxf6
Interpolis 1983 – Round 1 – Huebner, Robert – 1/2-1/2 – Polugaevsky, Lev – G3 1. c4 c5 2. Nf3 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 d6 9. e4 a6 10. Qe3 Nbd7
Luzern olm 1982 – Round 5 – Smejkal, Jan – 1/2-1/2 – Kasparov, Garry – G23 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 d6 9. Bg5 a6 10. Bxf6 Bxf6
Luzern olm 1982 – Round 9 – Andersson, Ulf 1949 – 1-0 – Gruenfeld, Yehuda – G41 1. Nf3 Nf6 2. c4 c5 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 d6 9. Bg5 a6 10. Bxf6 Bxf6
Moscow-4teams 1981 – Round 1 – Karpov, Anatoly – 1/2-1/2 – Kasparov, Garry – G3 1. c4 Nf6 2. Nc3 c5 3. Nf3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 d6 9. Bg5 a6 10. Bxf6 Bxf6
Mtel Masters 2005 – Round 5 – Anand, Viswanathan – 1/2-1/2 – Adams, Michael – G9 1. Nf3 Nf6 2. c4 e6 3. Nc3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 d6 9. Bg5 a6 10. Bxf6 Bxf6
Phillips&Drew 1980 – Round 9 – Korchnoi, Viktor – 1-0 – Browne, Winifred – G23 1. c4 c5 2. Nf3 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 d6 9. e4 a6 10. Qe3 O-O
Phillips&Drew 1982 – Round 1 – Andersson, Ulf 1949 – 1-0 – Seirawan, Yasser – G42 1. Nf3 Nf6 2. c4 c5 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 d6 9. Bg5 a6 10. Bxf6 Bxf6
Rapid Match 2007 – Round 3 – Kramnik, Vladimir – 0-1 – Aronian, Levon – G3 1. Nf3 Nf6 2. c4 b6 3. g3 c5 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 d6 9. Bg5 a6 10. Bxf6 Bxf6
SportAccord Blindfold Men 2012 – Round 2.5 – Radjabov, Teimour – 1-0 – Giri, Anish – G13 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 d6 9. Bg5 h6 10. Bxf6 Bxf6
Szirak Interzonal 1987 – Round 12 – Salov, Valery – 1/2-1/2 – Portisch, Lajos – G22 1. Nf3 c5 2. c4 Nf6 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 d6 9. Bg5 a6 10. Bxf6 Bxf6
Thessaloniki olm 1984 – Round 14 – Vaganian, Rafael A – 1-0 – Huebner, Robert – G92 1. Nf3 Nf6 2. c4 c5 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 d6 9. Bg5 a6 10. Bxf6 Bxf6
World Blitz 2009 – Round 23 – Kramnik, Vladimir – 0-1 – Carlsen, Magnus – G238 1. Nf3 Nf6 2. c4 c5 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 d6 9. Bg5 a6 10. Bxf6 Bxf6

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