Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● a2→b3, c2→b3	● d6→c5, e7→d6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● c4 (2v0)	—
Cases faibles	—	—
Centre	● d5 (1v0)	● d4 (1v0), ● e5 (1v0)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 2)
Bf1	● Bf1 Non développé (mob. 5)
Bc8		● Bc8 Non développé (mob. 5)
Bf8		● Bf8 Non développé (mob. 0)
Paire de fous	● Oui	● Oui
Non développées	6 (● b1, ● g1, ● c1, ● f1, ● a1, ● h1)	6 (● b8, ● g8, ● c8, ● f8, ● 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, ● e4-e5	● …c5-c4, ● …d6-d5, ● …f7-f5

B20k — Sicilian: Snyder, 2…d6

1.e4 c5 2.b3 d6 * ○ Trait aux Blancs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plans. Bb2 (Fianchetto, fou sur la grande diagonale — 88 % des parties) ; Bb5+ (Fou actif (mobilité 9), Développer f1 — 5 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plans. ...Nf6 (Développer g8 — 51 % des parties) ; ...Nc6 (Développer b8 — 24 % des parties) ; ...e5 (Occuper le centre — 11 % des parties) ; ...e6 (Solidifier le centre, libérer le fou — 8 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Partie
? 1984 – Round ? – Hjorth Gregory – 0-1 – Polugaevsky, Lev – G12 1. e4 c5 2. b3 d6 3. Bb2 Nf6 4. Bb5+ Nbd7 5. Qe2 e5 6. f4 exf4 7. Nh3 Be7 8. Nxf4 O-O 9. Bxd7 Bxd7 10. O-O Bc6
1956 CSR Ch – Round 15 – Florian, Jaromir – 1-0 – Betak Miroslav – G138 1. e4 c5 2. b3 d6 3. Bb2 e5 4. g3 Be6 5. Bg2 Qc8 6. Nc3 Nf6 7. f4 Bg4 8. Nce2 Nbd7 9. h3 Bxe2 10. Qxe2 Be7
1956 Leningrad ch-URS – Round 1 – Simagin, Vladimir – 1/2-1/2 – Averbakh, Yuri L – G80 1. e4 c5 2. b3 d6 3. Bb2 Nf6 4. Nc3 Nc6 5. Nf3 e5 6. Be2 g6 7. O-O Bg7 8. Ne1 O-O 9. Bc4 Be6 10. Bxe6 fxe6
1961 Hungary Ch – Round 1 – Orendi, E. – 1/2-1/2 – Lengyel, Laszlo – G4 1. e4 c5 2. b3 d6 3. Bb2 Nf6 4. Bb5+ Nbd7 5. Qe2 e5 6. f4 a6 7. Bxd7+ Nxd7 8. Nf3 f6 9. Nh4 Qe7 10. Nc3 Nb6
1968 Lugano olm - Round 1 - Skold, Kent-Ake - 0-1 - Malich, Burkhard, Dr. - G138 1. e4 c5 2. b3 d6 3. Bb2 Nf6 4. Bb5+ Bd7 5. Bxd7+ Nbxd7 6. Qe2 e6 7. f4 Be7 8. Nf3 O-O 9. O-O Ne8 10. Nc3 Nc7
1968 Netanya-A – Round 6 – Czerniak, Magdalena – 1-0 – Hamann, Slawomir – G32 1. e4 c5 2. b3 d6 3. Bb2 Nf6 4. Nc3 Nc6 5. f4 a6 6. Nf3 b5 7. Bd3 e6 8. O-O c4 9. Be2 cxb3 10. axb3 b4
Amber Blindfold 2006 – Round 7 – Aronian, Levon – 0-1 – Morozevich, Alexander – G26 1. e4 c5 2. b3 d6 3. Bb2 Nf6 4. Bb5+ Bd7 5. Bxd7+ Qxd7 6. d3 g6 7. f4 Bg7 8. Nf3 O-O 9. O-O Nc6 10. Qe1 Rac8
Buenos Aires olm 1978 – Round 1 – Lein, Andreas – 0-1 – Polugaevsky, Lev – G20 1. e4 c5 2. b3 d6 3. Bb5+ Bd7 4. c4 Bxb5 5. cxb5 a6 6. Nc3 Nf6 7. Nf3 g6 8. Bb2 axb5 9. Nxb5 Bg7 10. O-O O-O
Buenos Aires olm 1978 – Round 1 – Spassky, Boris V. – 1-0 – Hebert Auby, Jean – G18 1. e4 c5 2. b3 d6 3. Bb2 a6 4. f4 Nc6 5. Nf3 e6 6. g3 Nf6 7. e5 dxe5 8. fxe5 Ng4 9. Bg2 h5 10. Qe2 Nb4
Buenos Aires olm 1978 – Round 1 – Spassky, Boris V. – 1/2-1/2 – Huebner, Robert – G17 1. e4 c5 2. b3 d6 3. Bb2 Nf6 4. Bb5+ Bd7 5. Bxd7+ Qxd7 6. Bxf6 gxf6 7. Qh5 Nc6 8. Nc3 f5 9. Qxf5 Qxf5 10. exf5 Nd4
Corus A 2008 – Round 5 – Mamedyarov, Shakhriyar – 1-0 – Van Wely, Loek – G30 1. e4 c5 2. b3 d6 3. Bb2 Nf6 4. Bb5+ Bd7 5. Bxd7+ Qxd7 6. d3 Nc6 7. f4 d5 8. Nd2 O-O-O 9. Qe2 dxe4 10. dxe4 Nd4
FIDE World Blitz Championship 2014 – Round 13.21 – Morozevich, Alexander – 1-0 – Milov, Vadim – G113 1. e4 c5 2. b3 d6 3. Bb2 Nf6 4. Bb5+ Bd7 5. Bxd7+ Nbxd7 6. d3 g6 7. f4 Bg7 8. Nf3 O-O 9. Qe2 e5 10. f5 d5
FIDE World Rapid Championship 2014 – Round 13.8 – Morozevich, Alexander – 1-0 – Moiseenko, Alexander – G64 1. e4 c5 2. b3 d6 3. Bb2 Nf6 4. Bb5+ Nc6 5. Bxc6+ bxc6 6. d3 g6 7. Ne2 Bg7 8. O-O O-O 9. h3 e5 10. Ng3 h5
OHRA 1984 – Round 1 – Hjorth, Gunnar – 0-1 – Polugaevsky, Lev – G3 1. e4 c5 2. b3 d6 3. Bb2 Nf6 4. Bb5+ Nbd7 5. Qe2 e5 6. f4 exf4 7. Nh3 Be7 8. Nxf4 O-O 9. Bxd7 Bxd7 10. O-O Bc6

B20k — Snyder (1956)

1.e4 c5 2.b3 d6

Les coups candidats

3.Bb2 — 87.9% (2438 parties)

Ambassadeurs : Skorna, Ullrich (37x), Gelashvili, Tamaz (31x), Repkova, Eva (18x), Kivisto, Mikko (14x), Paichadze, Luka (13x), Elez, Nikola (11x), Honfi, Karoly (10x), Juelich, Thomas (7x)

3.Bb5+ — 5.2% (144 parties)

Ambassadeurs : Vukovic, Zdravko (8x), Fakhiridou, Ekaterini (5x), Franzen, Jozef (3x), Khugashvili, Tamara (3x), Gabriel Anyang Pager (2x), Tenti, Joaquin (2x), Nikac, Predrag (2x), Pawlicka, Alicja (2x)

3.f4 — 3.3% (91 parties)

Ambassadeurs : Walta, Paivi (6x), Reprintsev, Alexander (3x), Popp Tony (3x), Tuominen, Tanja (2x), Romanov, Egor (2x), Kron, Valentin (2x), Gaprindashvili, Nona (1x), Lazarevic, Aleksandar (1x)

3.Nf3 — 1.3% (35 parties) →

Ambassadeurs : Alen Bobby (2x), Weigand, Bernhard, Prof. Dr. (2x), Kinnmark, Ove (1x), Malmgren, Sven-Goran (1x), Haagen Hansen, Jens (1x), Zimmerman, John (1x), Reitberger, Peter, Dr. (1x), Hausmann, Marcus (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	3.Bb2	3.Bb5+	3.f4	3.Nf3
<1800	202	81%	9%	2%	2%
1800-2200	1211	89%	5%	3%	1%
2200-2600	972	89%	6%	3%	1%
2600+	16	88%	—	6%	6%

Évolution par décennie (% des parties)

Décennie	N parties	3.Bb2	3.Bb5+	3.f4	3.Nf3
1950s	2	100%	—	—	—
1960s	10	80%	—	10%	10%
1970s	37	78%	14%	3%	—
1980s	173	91%	2%	3%	1%
1990s	538	87%	4%	5%	1%
2000s	903	86%	6%	3%	1%
2010s	886	89%	5%	3%	1%
2020s	225	92%	4%	1%	1%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
3.Bb2	89%	92%	▲ +2.8%
3.Bb5+	5%	4%	▼ -0.9%
3.f4	3%	1%	▼ -2.4%
3.Nf3	1%	1%	+0.3%

Joueurs célèbres

Champions du monde dans cette position

Hou, Yifan — 1 partie

Parties historiques

3.Bb2 — 87.9% (2438 parties)

1956 — Simagin, Vladimir vs Averbakh, Yuri L — 1/2-1/2 — Leningrad ch-URS
1956 — Florian, Jaromir vs Betak Miroslav — 1-0 — Podebrady CZE
1961 — Orendi, E. vs Lengyel, Levente — 1/2-1/2 — Hungary ch
1964 — Czerniak, Moshe vs Friedgood, David — 1-0 — Wilderness Hotel, Wilderness
1967 — Babushkin, Eduard vs Volchok, Alexandr — 1/2-1/2 — ?

3.Bb5+ — 5.2% (144 parties)

1972 — Hemmert, Burghard vs Rorvall, Goran — 1-0 — Hallsberg SWE
1978 — Lein, Andreas vs Polugaevsky, Lev — 0-1 — Buenos Aires olm
1979 — Franzen, Jozef vs Plachetka, Jan — 0-1 — Stary Smokovec SVK
1979 — Franzen, Jozef vs Ftacnik, Lubomir — 0-1 — Dolny Kubin
1979 — Franzen, Jozef vs Cvetkovic, Srdjan — 1/2-1/2 — Stary Smokovec SVK

3.f4 — 3.3% (91 parties)

1966 — Gaprindashvili, Nona vs Lazarevic, Aleksandar — 0-1 — Belgrade SRB
1974 — Broberg, Horst vs Heinig, Wolfram, Dr. — 1/2-1/2 — DDR-ch 23th Potsdam GER
1982 — Khugashvili, Tamara vs Jicman, Ligia-Letitia — 0-1 — Baile Herculane wom
1983 — Weidemann, Joerg vs Doncevic, Dario — 1/2-1/2 — Duitsland tt
1984 — Roloff, Henrique Couto vs Ostwald, Hans-Dieter — 1-0 — corr DDR/FS

3.Nf3 — 1.3% (35 parties)

1967 — Kinnmark, Ove vs Malmgren, Sven-Goran — 1-0 — Goteborg SWE
1982 — Haagen Hansen, Jens vs Zimmerman, John — 1-0 — Denmark
1989 — Reitberger, Peter, Dr. vs Hausmann, Marcus — 0-1 — Ingolstadt
1993 — Weigand, Bernhard, Prof. Dr. vs Ksieski, Zbigniew — 1/2-1/2 — GER
1994 — Alen Bobby vs Greif, Andrej — 1-0 — Paderborn GER

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