B20a — Sicilian: 2.g3

1.e4 c5 2.g3 g6 3.Bg2 Bg7 * ○ Trait aux Blancs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

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Plan principal. Attaque sur le roi adverse resté au centre.

Atouts. Les Blancs s'appuient sur la paire de fous.

Côté adverse. Le fou enfermé en c8 et le roi resté au centre.

En contrepartie. Le roi n'est pas encore à l'abri et plusieurs pièces dorment encore (les cavaliers b1 et g1, le fou c1 et les tours a1 et h1).

Plans. Nf3 (Développer Ng1) ; d3 (Libérer Bc1) ; c3 (Préparer d4).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

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Plan principal. Attaque sur le roi adverse resté au centre.

Atouts. Les Noirs s'appuient sur la case forte d4, un fou actif en g7 et la paire de fous.

Côté adverse. Le fou enfermé en c1 et le roi resté au centre.

En contrepartie. Le roi n'est pas encore à l'abri et plusieurs pièces dorment encore (les cavaliers b8 et g8, le fou c8 et les tours a8 et h8).

Plans. ...d6 (Libérer Bc8) ; ...Nc6 (Développer Nb8) ; ...Nf6 (Développer Ng8) ; ...c4 (Rupture) ; ...d5 (Rupture).

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

	♔ 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)
Cases faibles	—	—
Centre	● d5 (1v0), ● e4 (1v0)	● d4 (2v0), ● e5 (1v0)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bg2	● Bg2 Ok (mob. 3)
Bg7		● Bg7 Actif (mob. 7)
Bc8		● Bc8 Non développé (mob. 0)
Paire de fous	● Oui	● Oui
Non développées	5 (● b1, ● g1, ● c1, ● a1, ● h1)	5 (● b8, ● 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	semi-ouvert
Ruptures	● c2-c3, ● d2-d3, ● e4-e5, ● f2-f3	● …c5-c4, ● …d7-d6, ● …d7-d5, ● …e7-e6, ● …e7-e5, ● …f7-f6, ● …f7-f5

Partie
1924 Gyor – Round 1 – Exner, Gyozo – 0-1 – Havasi, Kornel – G33 1. e4 c5 2. g3 g6 3. Bg2 Bg7 4. Ne2 Nc6 5. O-O d6 6. d3 h5 7. h3 Bd7 8. c3 Qc8 9. Kh2 Qc7 10. Be3 Nf6
1924 Hastings Premier Section 2 /25 5th – Round 6 – Steiner, Endre – 1/2-1/2 – Tartakower, Savielly – G23 1. e4 c5 2. g3 g6 3. Bg2 Bg7 4. Ne2 Nc6 5. O-O d6 6. d3 Bd7 7. h3 Nd4 8. Nxd4 cxd4 9. c4 dxc3 10. Nxc3 Nf6
1957 Dublin zt – Round 11 – Plater, Kazimierz – 1/2-1/2 – Gligorić, Svetozar – G91 1. g3 g6 2. Bg2 Bg7 3. e4 c5 4. Ne2 Nc6 5. O-O d6 6. d3 e5 7. f4 Nge7 8. Nbc3 O-O 9. Nd5 Nxd5 10. exd5 Nd4
1960 OWL Ch Detmold – Round 10 – Speer, Albrecht – 1-0 – Friedrich Hermann – G9 1. g3 c5 2. Bg2 g6 3. e4 Bg7 4. Ne2 Nc6 5. c3 d6 6. d3 Nf6 7. h3 O-O 8. Be3 Qb6 9. Qd2 Ne5 10. Nc1 Ne8
1961 Oberhausen etc – Round 1 – Botvinnik, Mikhail – 1-0 – Perez Perez, Francisco Jose – G47 1. g3 g6 2. Bg2 Bg7 3. e4 c5 4. Ne2 Nc6 5. d3 d6 6. c3 Nf6 7. f4 Bd7 8. Nd2 h5 9. h3 Qc8 10. Nc4 b5
1961 USA Ch Open 62th – Round 4 – Lapiken, Peter Petrovich – 0-1 – Benko, Pal – G12 1. e4 c5 2. g3 g6 3. Bg2 Bg7 4. Ne2 Nf6 5. Nbc3 Nc6 6. d3 d6 7. O-O O-O 8. h3 Ne8 9. f4 f5 10. Be3 Nd4
1962 Argentina – Round 1 – Sanguinetti, Raul – 1-0 – Goldenberg, Edgardo – G23 1. g3 g6 2. Bg2 Bg7 3. e4 c5 4. Ne2 Nc6 5. O-O Nf6 6. Nbc3 d6 7. d3 O-O 8. f4 Nd4 9. h3 Ne8 10. Kh2 Nc7
1962 URS Team Ch – Round 1 – Averbakh, Yuri L – 1-0 – Krogius, Nikolai V – G125 1. g3 g6 2. Bg2 Bg7 3. e4 c5 4. Ne2 Nc6 5. O-O Nf6 6. d4 cxd4 7. Nxd4 Nxd4 8. Qxd4 O-O 9. e5 Ne8 10. Bf4 Nc7
1962 Varna olm – Round 9 – Robatsch, Karl – 0-1 – Najdorf, Miguel – G212 1. g3 g6 2. Bg2 Bg7 3. e4 c5 4. Ne2 Nc6 5. O-O d6 6. d3 Nf6 7. Nbc3 O-O 8. h3 Ne8 9. Kh2 Rb8 10. Be3 Nd4
1963 Budapest ch-HUN – Round 1 – Lengyel, Laszlo – 1/2-1/2 – Kovacs H., Zoltan – G173 1. g3 c5 2. Bg2 g6 3. e4 Bg7 4. Ne2 Nc6 5. O-O e6 6. d3 Nge7 7. Nd2 O-O 8. f4 d5 9. Kh1 b6 10. Ng1 Ba6
1963 CSR Ch – Round 6 – Ujtelky, Maximilian – 1-0 – Acosta Fabian, Janna Paloma – G55 1. g3 g6 2. Bg2 Bg7 3. e4 c5 4. Ne2 Nc6 5. O-O d6 6. h3 e5 7. d3 Be6 8. Be3 Qd7 9. Kh2 Nge7 10. c3 O-O
1963 Fortaleza zt – Round 4 – Garcia Rodriguez, Raimundo – 1/2-1/2 – Camara Ronald – G20 1. g3 g6 2. Bg2 Bg7 3. e4 c5 4. Ne2 Nc6 5. O-O d6 6. Nbc3 e6 7. d3 Nge7 8. Be3 Nd4 9. Qd2 O-O 10. Kh1 Rb8
1963 Hoogovens – Round 2 – Awerbach – 1/2-1/2 – Parma, Bruno – G28 1. g3 c5 2. Bg2 g6 3. e4 Bg7 4. Ne2 Nc6 5. O-O d6 6. c3 e5 7. a3 Nge7 8. b4 O-O 9. d3 Be6 10. Be3 b6
1963 Polanica Zdroj – Round 1 – Planter, Kazimierz – 1-0 – Bednarski, Jacek – G11 1. g3 g6 2. Bg2 Bg7 3. e4 c5 4. Ne2 Nc6 5. c3 Nf6 6. d4 cxd4 7. cxd4 d6 8. Nbc3 O-O 9. O-O Bd7 10. h3 Qb6
1963 Polanica Zdroj – Round 10 – Plater, Kazimierz – 1/2-1/2 – Gunsberger, Alexander – G14 1. g3 g6 2. Bg2 Bg7 3. e4 c5 4. Ne2 Nc6 5. c3 e5 6. d3 Nge7 7. Be3 d6 8. O-O O-O 9. Na3 b6 10. Qd2 Ba6
1963 UKR Ch – Round 5 – Lazarev, Efim M. – 1/2-1/2 – Bukhover, Alik – G34 1. g3 g6 2. Bg2 Bg7 3. e4 c5 4. Nf3 Nc6 5. O-O Nf6 6. Re1 O-O 7. c3 d6 8. h3 Ne8 9. Na3 e5 10. Nc2 f5
1963 YUG Ch 19th – Round 15 – Gojak, Ilija – 0-1 – Velimirovic, Dragoljub – G54 1. g3 g6 2. Bg2 Bg7 3. e4 c5 4. Nf3 Nc6 5. O-O e5 6. d3 Nge7 7. Be3 d6 8. Nc3 O-O 9. Qd2 Qc7 10. a3 Be6
1964 WchT U26 11. fin-B – Round 8.1 – Brostrom, Goran – 1/2-1/2 – Hollis, Adrian – G38 1. g3 g6 2. Bg2 Bg7 3. e4 c5 4. Ne2 Nc6 5. c3 Nf6 6. d4 cxd4 7. cxd4 O-O 8. Nbc3 d6 9. O-O Bd7 10. h3 Rc8
1966 La Habana olm fin-A – Round 1 – Benko, Pal – 1/2-1/2 – Brinck-Claussen, Bjorn – G20 1. g3 g6 2. Bg2 Bg7 3. e4 c5 4. c3 Nc6 5. Ne2 e5 6. d3 Nge7 7. Be3 d6 8. Qd2 O-O 9. Na3 b6 10. Bh6 Bxh6
1966 Rzeszow ch POL – Round 10 – Lewi, Jerzy – 0-1 – Brzozka, Stefan – G65 1. e4 c5 2. g3 g6 3. Bg2 Bg7 4. Nf3 Nc6 5. c3 e5 6. O-O Nge7 7. d3 O-O 8. a4 d5 9. exd5 Nxd5 10. Na3 h6
1967 Budapest Bajnogsag 8th – Round 6 – Csom, Istvan – 1/2-1/2 – Dely, Peter – G38 1. e4 g6 2. g3 Bg7 3. Bg2 c5 4. Ne2 Nc6 5. c3 e5 6. O-O Nge7 7. d3 d5 8. Bg5 Be6 9. Qc1 O-O 10. Na3 Qd7
1967 Halle zt – Round 18 – Zwaig, Arne – 1/2-1/2 – Chathuranga, W W M Danushka Mini – G90 1. g3 g6 2. Bg2 Bg7 3. e4 c5 4. Ne2 Nc6 5. d3 d6 6. O-O e5 7. Nd2 Nge7 8. Nc3 O-O 9. Nc4 Be6 10. Nd5 Qd7
1967 Rubinstein Memorial – Round 8 – Orbaan, Constant – 0-1 – Adamski, Jan – G25 1. e4 c5 2. g3 g6 3. Bg2 Bg7 4. Ne2 Nc6 5. O-O d6 6. d3 e5 7. c3 Nge7 8. Be3 O-O 9. Na3 b6 10. Qd2 d5
1967 Sousse Interzonal – Round 21 – Bilek, Istvan – 1/2-1/2 – Reshevsky, Samuel – G200 1. g3 g6 2. Bg2 Bg7 3. e4 c5 4. d3 e5 5. Nc3 d6 6. f4 exf4 7. Bxf4 Nc6 8. Qd2 Nge7 9. Nge2 O-O 10. O-O Bg4
1968 Moscow – Round 1 – Knezevic, Milorad – 0-1 – Razuvaev, Yuri S – G12 1. g3 g6 2. Bg2 Bg7 3. e4 c5 4. Ne2 Nc6 5. O-O d6 6. c3 e5 7. d3 Nge7 8. Be3 O-O 9. d4 exd4 10. cxd4 Bg4
1968 ROM Ch – Round 8 – Segal, Alexandru Sorin – 0-1 – Troianescu, Octav – G43 1. e4 c5 2. g3 g6 3. Bg2 Bg7 4. Ne2 Nc6 5. d3 d6 6. c3 e6 7. O-O Nge7 8. Be3 O-O 9. d4 cxd4 10. Nxd4 d5
1969 Leeuwarden ch-NED – Round 1 – Kramer, Haije – 1/2-1/2 – Cuijpers, Frans Andre – G13 1. g3 g6 2. Bg2 Bg7 3. e4 c5 4. Ne2 Nc6 5. O-O d6 6. d3 e5 7. c4 a6 8. Nbc3 Rb8 9. a3 Nge7 10. Rb1 b5
1969 Nordiska masterskapen - Lidkoping – Round 6 – Hoen, Ragnar Harald – 1-0 – Gliksman, Darko – G6 1. e4 g6 2. g3 Bg7 3. Bg2 c5 4. Ne2 Nc6 5. O-O d6 6. c3 e5 7. Na3 Nge7 8. Nc2 O-O 9. d4 exd4 10. cxd4 cxd4
1969 Raach zt – Round 4 – Zwaig, Arne – 0-1 – Barczay, Laszlo – G48 1. g3 g6 2. Bg2 Bg7 3. e4 c5 4. d3 e6 5. h4 h5 6. Nc3 Nc6 7. Bg5 Nge7 8. Qd2 d6 9. a3 a6 10. Rb1 Qc7
1969 Sarajevo – Round 1 – Gliksman, Darko – 1/2-1/2 – Matulovic, Milan – G17 1. g3 g6 2. Bg2 Bg7 3. e4 c5 4. Ne2 Nc6 5. O-O d6 6. c3 e5 7. Na3 Nge7 8. Nc2 O-O 9. d4 exd4 10. cxd4 cxd4
1970 Palma de Mallorca Interzonal – Round 2 – Huebner, Robert – 1/2-1/2 – Filip, Marius Liviu – G246 1. g3 g6 2. Bg2 Bg7 3. e4 c5 4. Ne2 Nc6 5. O-O e5 6. d3 Nge7 7. Be3 d6 8. c3 O-O 9. Qd2 Be6 10. Na3 Qd7
41. Olympiad Open 2014 – Round 3.22 – Cori, Jorge – 1/2-1/2 – Hamitevici, Vladimir – G212 1. g3 c5 2. Bg2 g6 3. e4 Bg7 4. Ne2 Nc6 5. O-O e6 6. d3 Nge7 7. Nd2 O-O 8. f4 d6 9. Nf3 b6 10. c3 Ba6
FIDE World Blitz Championship 2014 – Round 6.23 – Bartel, Mateusz – 0-1 – Caruana, Fabiano – G50 1. g3 g6 2. Bg2 Bg7 3. e4 c5 4. Ne2 Nc6 5. c3 e6 6. d4 cxd4 7. cxd4 d5 8. e5 Nge7 9. O-O O-O 10. Nbc3 b6
GCT Blitz YourNextMove 2018 – Round 16.3 – Caruana, Fabiano – 0-1 – So, Wesley – G78 1. g3 c5 2. Bg2 g6 3. e4 Bg7 4. Ne2 Nc6 5. c3 e5 6. O-O Nge7 7. d3 d5 8. a4 O-O 9. Na3 Be6 10. Qc2 Qd7
TCh-RUS 2008 – Round 9 – Zvjaginsev, Vadim – 1-0 – Areshchenko, Alexander – G242 1. e4 c5 2. g3 g6 3. Bg2 Bg7 4. Na3 Nc6 5. d3 d6 6. f4 Nh6 7. Nf3 O-O 8. O-O f5 9. c3 Kh8 10. h3 Rb8
World Blitz 2009 – Round 13 – Karjakin, Sergey – 0-1 – Carlsen, Magnus – G131 1. e4 c5 2. g3 g6 3. Bg2 Bg7 4. Ne2 d6 5. c3 Nf6 6. d4 O-O 7. O-O Nc6 8. h3 e5 9. Be3 cxd4 10. cxd4 exd4
World Blitz 2015 – Round 12.27 – Munoz, Miguel – 0-1 – Korobov, Anton – G736 1. e4 c5 2. g3 g6 3. Bg2 Bg7 4. Ne2 Nc6 5. c3 e5 6. d3 Nge7 7. Be3 b6 8. d4 exd4 9. cxd4 cxd4 10. Nxd4 Ba6
World Blitz 2015 – Round 18.36 – Munoz, Miguel – 1-0 – Zvjaginsev, Vadim – G1123 1. e4 c5 2. g3 g6 3. Bg2 Bg7 4. Ne2 Nc6 5. c3 e5 6. d3 Nge7 7. Be3 b6 8. d4 exd4 9. cxd4 Ba6 10. Nbc3 cxd4
World Blitz 2015 – Round 19.2 – Ivanchuk, Vasyl – 1-0 – Vachier-Lagrave, Maxime – G1171 1. e4 c5 2. g3 g6 3. Bg2 Bg7 4. d3 Nc6 5. f4 e6 6. Nf3 Nge7 7. c3 d5 8. O-O b6 9. Na3 O-O 10. e5 Rb8
World Blitz 2022 – Round 20.31 – Ponkratov, Pavel – 0-1 – Aravindh, Chithambaram VR. – G1063 1. g3 g6 2. Bg2 Bg7 3. e4 c5 4. Ne2 Nc6 5. O-O h5 6. h3 d6 7. d3 Nf6 8. f4 O-O 9. Nd2 Bd7 10. Nf3 b5

B20a —

1.e4 c5 2.g3 g6 3.Bg2 Bg7

Eval: [-0.15]

Les coups candidats

4.Ne2 — 38.1% (872 parties)

Ambassadeurs : Petran, Peter (44x), Mozes, Ervin (16x), Cugini, Verter (8x), Munoz, Miguel (8x), Totsky, Leonid (7x), Alekhine, Alexander (6x), Weyrich, Morten (6x), Minich, Peter (5x)

4.d3 — 25.5% (583 parties)

Ambassadeurs : Clemens, Christian, Dr. (12x), King, Daniel J (11x), Ost-Hansen, Jacob (9x), Movsziszian, Karen (8x), Todorcevic Antic, Miodrag (7x), Weindl, Alfred (5x), Hernandez Estevez, Yudania (5x), Seeman, Tarvo (5x)

4.f4 — 13.1% (300 parties) →

Ambassadeurs : Boguszlavszkij, Jevgenyij (8x), Moser, Emily (7x), Manicuta, Monica (6x), Braga, Cicero Nogueira (6x), Chernikov, Oleg L (5x), Seeman, Tarvo (5x), Vedrickiene, Jovita (4x), Moser, Eva (4x)

4.Nc3 — 11.8% (271 parties)

Ambassadeurs : Blodig, Reinhard (8x), Lazic, Miroljub (8x), Brueggemann, Joachim (6x), Jacobsen, Bo (5x), Rozkovec, Hynek (4x), Motyl, Tomasz (4x), Gerzadowicz, Stephan C (3x), Norwood, David R (3x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	4.Ne2	4.d3	4.f4	4.Nc3
<1800	35	29%	14%	11%	20%
1800-2200	638	36%	23%	13%	12%
2200-2600	1191	40%	28%	15%	11%
2600+	23	30%	35%	13%	4%

Évolution par décennie (% des parties)

Décennie	N parties	4.Ne2	4.d3	4.f4	4.Nc3
1900s	1	—	—	—	—
1910s	6	100%	—	—	—
1920s	4	75%	—	—	25%
1930s	1	100%	—	—	—
1950s	6	83%	—	—	17%
1960s	69	57%	17%	6%	12%
1970s	125	39%	26%	5%	18%
1980s	181	41%	31%	8%	13%
1990s	550	34%	27%	14%	15%
2000s	616	30%	30%	19%	9%
2010s	632	42%	21%	11%	11%
2020s	97	57%	18%	9%	8%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
4.Ne2	42%	57%	▲ +14.5%
4.d3	21%	18%	▼ -3.4%
4.f4	11%	9%	▼ -2.0%
4.Nc3	11%	8%	▼ -2.5%

Joueurs célèbres

Champions du monde dans cette position

Alekhine, Alexander — 6 parties
Botvinnik, Mikhail — 1 partie
Kasparov, Garry — 1 partie
Smyslov, Vladimir — 1 partie
Tal, Mikhail — 1 partie
Carlsen, Magnus — 1 partie
Ding, Liren — 1 partie

Parties historiques

4.Ne2 — 38.1% (872 parties)

1912 — Potemkin Peter Petrovich vs Alekhine, Alexander — 0-1 — ?
1912 — Peter Potemkin vs Alekhine, Alexander — 0-1 — St Petersburg RUS
1912 — Peter Potemkin vs Alekhine, Alexander — 0-1 — St Petersburg RUS
1912 — Potemkin, Artem A vs Alekhine, Alexander — 0-1 — St Petersburg #38
1914 — Bogoljubow, Efim vs Alekhine, Alexander — 0-1 — Mannheim GER

4.d3 — 25.5% (583 parties)

1963 — Lazarev, Efim M. vs Kirilov, Valentins — 1/2-1/2 — Kiev UKR
1964 — Gardais Philippe vs Szabo, Ladislav — 0-1 — Tel Aviv ISR
1965 — Studenetzky, Moises vs Rubinetti, Jorge — 0-1 — Buenos Aires ARG
1967 — Ivkov, Borislav vs Gligorić, Svetozar — 1/2-1/2 — Palma de Majorca ESP
1967 — Bilek, Istvan vs Reshevsky, Samuel — 1/2-1/2 — Sousse TUN

4.f4 — 13.1% (300 parties)

1965 — Petrosian, Tigran A. vs Unzicker, Wolfgang — 1/2-1/2 — Hamburg GER
1968 — Zwaig, Arne vs Tsouros, Georgios — 1-0 — Ybbs
1969 — Zwaig, Arne vs Ivkov, Borislav — 1/2-1/2 — Raach
1969 — Urban, Bohumil vs Zavodny, Zdenek — 1/2-1/2 — Brno CZE
1972 — De Fotis, Gregory vs Reshevsky, Samuel — 1/2-1/2 — New York, NY USA

4.Nc3 — 11.8% (271 parties)

1924 — Malmberg, Erik vs Colle, Edgar — 0-1 — Paris FRA
1957 — Suetin, Alexey S vs Shagalovich, Abo — 1-0 — Ch URS (1/4 final), Minsk (Be
1963 — Vranesic, Zvonko vs Kalotay, Andrew — 1-0 — Winnipeg CAN
1963 — Vranesic, Zvonko vs Joyner, Lionel — 1/2-1/2 — Canadian Closed Cham
1965 — Gadia, Olicio vs Cotta, Eduardo — 1/2-1/2 — Rio de Janeiro BRA

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