A36h — English: Symmetrical, 5.a3 e6

1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.a3 e6 * ○ Trait aux Blancs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

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Plans. Rb1 (46 % des parties) ; b4 (Expansion aile dame — 37 % des parties) ; e4 (Occuper le centre — 7 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

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Plans. ...Nge7 (Développer g8 — 46 % des parties) ; ...a5 (16 % des parties) ; ...Nxb4 (13 % des parties) ; ...d6 (Libérer Bc8 — 12 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● b2→a3, f2→g3, h2→g3	● d7→e6, f7→e6, f7→g6, h7→g6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● e4 (2v0), ● b5 (2v0)	● d4 (3v0), ● e5 (2v0), ● f5 (2v0)
Cases faibles	—	—
Centre	● d5 (3v1), ● e4 (2v0)	● d4 (3v0), ● e5 (2v0)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bg2	● Bg2 Actif (mob. 6)
Bg7		● Bg7 Actif (mob. 6)
Bc8		● Bc8 Non développé (mob. 0)
Paire de fous	● Oui	● Oui
Non développées	4 (● g1, ● c1, ● a1, ● h1)	4 (● g8, ● c8, ● a8, ● h8)

Sécurité du roi

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

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	mobile
Ruptures	● d2-d4	● …d7-d5

Partie
1958 Asztalos Memorial – Round 11 – Forintos, Gyozo V – 1-0 – Bobotsov, Milko G – G32 1. c4 g6 2. Nc3 Bg7 3. g3 c5 4. Bg2 Nc6 5. a3 e6 6. Rb1 Nge7 7. b4 d6 8. e3 O-O 9. Nge2 d5 10. cxd5 exd5
1958 Asztalos Memorial – Round 3 – Bilek, Istvan – 1-0 – Bobocov, M. – G5 1. c4 c5 2. g3 Nc6 3. Bg2 g6 4. Nc3 Bg7 5. a3 e6 6. d3 Nge7 7. h4 d5 8. cxd5 Nxd5 9. Bd2 O-O 10. h5 Nd4
1963 Halle zt – Round 1 – Doda, Zbigniew – 1/2-1/2 – Uhlmann, Wolfgang – G113 1. g3 g6 2. Bg2 Bg7 3. c4 c5 4. Nc3 Nc6 5. a3 e6 6. Rb1 Nge7 7. b4 cxb4 8. axb4 d5 9. cxd5 exd5 10. b5 Ne5
1964 Amsterdam Interzonal – Round 14 – Evans, Larry M – 1-0 – Tringov, Georgi P – G132 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. a3 e6 6. e4 Nge7 7. Nge2 O-O 8. O-O b6 9. Rb1 Bb7 10. b4 d6
1964 URS Spartakiad – Round ? – Kotov, Alexander A – 1-0 – Kots, Yuri I – G5 1. c4 g6 2. Nc3 Bg7 3. g3 c5 4. Bg2 Nc6 5. a3 e6 6. Nh3 Nge7 7. Nf4 O-O 8. Rb1 a5 9. Qa4 d6 10. O-O Bd7
1964 URS Spartakiad – Round ? – Kotov, Alexander. – 1-0 – Kots, Yuri I – G10 1. c4 g6 2. Nc3 Bg7 3. g3 c5 4. Bg2 Nc6 5. a3 e6 6. Nh3 Nge7 7. Nf4 O-O 8. Rb1 a5 9. Qa4 d6 10. O-O Bd7
1965 HUN-ch21 – Round ? – Koberl, Ferenc – 0-1 – Filep, Tibor – G72 1. c4 c5 2. g3 Nc6 3. Bg2 g6 4. Nc3 Bg7 5. a3 e6 6. Nh3 Nge7 7. Nf4 a6 8. O-O Rb8 9. Rb1 b5 10. cxb5 axb5
1965 HUN-ch21 – Round ? – Koberl, Ferenc – 0-1 – Forintos, Gyozo V – G73 1. c4 c5 2. Nc3 g6 3. g3 Bg7 4. Bg2 Nc6 5. a3 e6 6. Nh3 h5 7. d3 Nge7 8. Nf4 g5 9. Nh3 g4 10. Nf4 h4
1967 October Revolution 50 – Round 1 – Kholmov, Ratmir D – 1-0 – Tringov, Georgi P – G1 1. c4 c5 2. g3 Nc6 3. Bg2 g6 4. Nc3 Bg7 5. a3 e6 6. d3 Nge7 7. Nf3 d5 8. cxd5 Nxd5 9. Bd2 b6 10. Nxd5 Qxd5
1968 Hungary – Round 1 – Barcza, Gedeon – 1/2-1/2 – Forintos, Gyozo V – G5 1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6 5. a3 e6 6. Rb1 Nge7 7. b4 cxb4 8. axb4 O-O 9. Nf3 b6 10. O-O Bb7
1968 Hungary – Round 1 – Barcza, Gedeon – 1/2-1/2 – Liptay, Laszlo Dr. – G15 1. c4 g6 2. g3 Bg7 3. Bg2 c5 4. Nc3 Nc6 5. a3 e6 6. b4 Nge7 7. Rb1 d6 8. Nf3 O-O 9. O-O h6 10. Na4 Rb8
1968 Hungary – Round 1 – Szabo, Ladislav – 1/2-1/2 – Bilek, Istvan – G4 1. c4 c5 2. Nc3 g6 3. g3 Bg7 4. Bg2 Nc6 5. a3 e6 6. e4 Nge7 7. Nge2 O-O 8. d3 b6 9. O-O Bb7 10. Rb1 d6 1/2-1/2
1968 Lugano – Round 1 – Acosta Garcia, Rafael Isaac – 0-1 – Byrne, Ray – G4 1. c4 g6 2. Nc3 Bg7 3. g3 c5 4. Bg2 Nc6 5. a3 e6 6. b4 cxb4 7. axb4 Nge7 8. b5 Ne5 9. c5 d5 10. cxd6 Qxd6
1968 Lugano ol (Men) fin-A – Round 10 – Garcia Rodriguez, Raimundo – 0-1 – Byrne, Robert E – G53 1. c4 g6 2. Nc3 Bg7 3. g3 c5 4. Bg2 Nc6 5. a3 e6 6. b4 cxb4 7. axb4 Nge7 8. b5 Ne5 9. c5 d5 10. cxd6 Qxd6
1969 Bulgaria – Round 1 – Spiridonov, Nikola – 0-1 – Uusi, Gunnar – G1 1. c4 c5 2. Nc3 g6 3. g3 Bg7 4. Bg2 Nc6 5. a3 e6 6. Rb1 Nge7 7. Ne4 d6 8. b4 f5 9. Nc3 O-O 10. Nf3 e5
1969 IBM I – Round 10 – Hartoch, Robert G – 1/2-1/2 – Tatai, Stefano – G36 1. c4 g6 2. g3 Bg7 3. Bg2 c5 4. Nc3 Nc6 5. a3 e6 6. e4 Nge7 7. Nge2 O-O 8. O-O a6 9. Rb1 b5 10. cxb5 axb5
1969 IBM I – Round 2 – Byrne, Ray – 0-1 – Barendregt, Johan – G9 1. c4 g6 2. Nc3 Bg7 3. g3 c5 4. Bg2 Nc6 5. a3 e6 6. b4 Nxb4 7. axb4 cxb4 8. Nb5 Bxa1 9. Qa4 Be5 10. Nf3 Bb8
1973 Leningrad Interzonal – Round 10 – Larsen, Bent – 1/2-1/2 – Karpov, Anatoly – G2 1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6 5. a3 e6 6. Rb1 a5 7. Nh3 Nge7 8. Nf4 O-O 9. d3 Rb8 10. Bd2 b6
1974 Manila – Round 1 – Ammann, Philipp – 1/2-1/2 – Berthelot, Yannick – G2 1. c4 c5 2. g3 Nc6 3. Bg2 g6 4. Nc3 Bg7 5. a3 e6 6. b4 cxb4 7. axb4 Nxb4 8. Ba3 Nc6 9. Nb5 Nge7 10. Bd6 Qb6
Amber-rapid 20th 2011 – Round 4 – Ivanchuk, Vasyl – 0-1 – Aronian, Levon – G10 1. c4 g6 2. g3 c5 3. Bg2 Bg7 4. Nc3 Nc6 5. a3 e6 6. b4 d6 7. Rb1 Nge7 8. Nf3 O-O 9. O-O b6 10. Qc2 Bb7
Biel Interzonal 1976 – Round 10 – Smejkal, Jan – 1-0 – Andersson, Ulf 1949 – G44 1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6 5. a3 e6 6. Rb1 a5 7. e4 d6 8. d3 Nge7 9. Nge2 O-O 10. O-O Rb8
GCT Blitz Paris 2016 – Round 12.5 – Topalov, Veselin – 1-0 – Giri, Anish – G60 1. c4 g6 2. g3 Bg7 3. Bg2 c5 4. Nc3 Nc6 5. a3 e6 6. Rb1 Nge7 7. b4 d6 8. Nf3 O-O 9. O-O b6 10. bxc5 bxc5
SportAccord Blitz Men 2013 – Round 19.1 – Ivanchuk, Vasyl – 1-0 – Aronian, Levon – G142 1. c4 g6 2. Nc3 c5 3. g3 Bg7 4. Bg2 Nc6 5. a3 e6 6. b4 d6 7. bxc5 dxc5 8. Bxc6+ bxc6 9. Qc2 Nf6 10. Nf3 O-O
Turin ol (Men) 37th 2006 – Round 4 – Gashimov, Vugar – 1-0 – ADEBAYO, Adegboyega Joel – G49 1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6 5. a3 e6 6. b4 Nge7 7. bxc5 Bxc3 8. dxc3 Qa5 9. Nf3 Qxc5 10. O-O f6

A36h — Symmetrical (1958)

1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.a3 e6

Les coups candidats

6.Rb1 — 46.2% (485 parties)

Ambassadeurs : Zueger, Beat (4x), Miles, Anthony J (4x), Ludgate, Alan (4x), Smejkal, Jan (3x), Ivkov, Borislav (3x), Quinteros, Miguel A. (3x), Kozlov, Oleg (3x), Bors, Tamas (3x)

6.b4 — 36.8% (386 parties)

Ambassadeurs : Wolanski, Michal (4x), Raicevic, Ivica (3x), Ptacnikova, Lenka (3x), Farago, Sandor (3x), Kurayan, Ruslan (3x), Dhananjay S (3x), Byrne, Robert E (2x), Kube, Hannelore (2x)

6.e4 — 6.6% (69 parties)

Ambassadeurs : Bak, Istvan (2x), Wedberg, Tom (2x), Ligterink, Gert (2x), Arambel, Sergio (2x), Evans, Larry (1x), Tringov, Georgi P (1x), Hartoch, Robert G (1x), Tatai, Stefano (1x)

6.Nh3 — 3.2% (34 parties)

Ambassadeurs : Filep, Tibor (2x), Koberl, Ferenc (2x), Hickl, Joerg (2x), Kotov, Alexander (1x), Kots, Yuri I (1x), Kluger, Gyula (1x), Forintos, Gyozo V (1x), Romanishin, Oleg M (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	6.Rb1	6.b4	6.e4	6.Nh3
<1800	35	43%	23%	11%	3%
1800-2200	390	44%	39%	7%	2%
2200-2600	544	49%	38%	5%	4%
2600+	14	43%	29%	14%	7%

Évolution par décennie (% des parties)

Décennie	N parties	6.Rb1	6.b4	6.e4	6.Nh3
1950s	2	50%	—	—	—
1960s	21	24%	29%	24%	19%
1970s	66	64%	23%	6%	5%
1980s	70	64%	26%	6%	1%
1990s	122	53%	26%	7%	5%
2000s	267	33%	52%	5%	3%
2010s	392	45%	39%	6%	3%
2020s	109	57%	19%	11%	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
6.Rb1	45%	57%	▲ +12.0%
6.b4	39%	19%	▼ -20.0%
6.e4	6%	11%	▲ +5.4%
6.Nh3	3%	0%	▼ -3.3%

Joueurs célèbres

Champions du monde dans cette position

Karpov, Anatoly — 2 parties
Carlsen, Magnus — 2 parties
Botvinnik, Mikhail — 1 partie
Ding, Liren — 1 partie

Parties historiques

6.Rb1 — 46.2% (485 parties)

1958 — Forintos, Gyozo V vs Bobotsov, Milko G — 1-0 — Balatonfured
1963 — Doda, Zbigniew vs Uhlmann, Wolfgang — 1/2-1/2 — Halle zt
1965 — De Las Heras, Juan Carlos vs Juarez, Carlos Eleodoro — 1/2-1/2 — Buenos Aires ARG
1967 — Bebchuk, Evgeni vs Kantorovich, A — 0-1 — Moscow RUS
1968 — Anay Barche vs Forintos, Gyozo V — 1/2-1/2 — HUN

6.b4 — 36.8% (386 parties)

1968 — Garcia R., Luis Ernesto vs Byrne, Ray — 0-1 — Lugano SUI
1968 — Garcia, Eder Raimundo vs Byrne, Robert E — 0-1 — Lugano SUI
1968 — Anay Barche vs Liptay, Laszlo Dr. — 1/2-1/2 — HUN
1969 — Kimelfeld, Rudolf vs Lisenko, Alexander V — 1/2-1/2 — Svetlogorsk
1969 — Byrne, Robert E vs Barendregt, Johan — 0-1 — Amsterdam NED

6.e4 — 6.6% (69 parties)

1964 — Evans, Larry vs Tringov, Georgi P — 1-0 — Amsterdam izt
1964 — Soos, Bela vs Geller, Efim P. — 1-0 — Varna BUL
1968 — Szabo, Laszlo vs Bak, Istvan — 1/2-1/2 — HUN
1969 — Hartoch, Robert G vs Tatai, Stefano — 1/2-1/2 — Amsterdam NED
1969 — Weber, Raymond vs Adorjan, Andras — 0-1 — Wch jr prelim 4

6.Nh3 — 3.2% (34 parties)

1964 — Kotov, Alexander vs Kots, Yuri I — 1-0 — URS Spartakiad
1966 — Koberl, Ferenc vs Filep, Tibor — 0-1 — Budapest HUN
1966 — Koberl, Ferenc vs Forintos, Gyozo V — 0-1 — Budapest HUN
1969 — Kluger, Gyula vs Filep, Tibor — 1/2-1/2 — Debrecen HUN
1973 — Udovcic, Mijo vs Bukic, Enver — 1/2-1/2 — Porec CRO

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