B59h — Sicilian: Boleslavsky, 7.Nb3 Be7 8.O-O O-O 9.Bg5

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 e5 7.Nb3 Be7 8.O-O O-O 9.Bg5 * ● Trait aux Noirs

Ouverture — Centre fermé

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Avantages : majorité aile_dame (3v2), case forte b5, case forte d5, avant-poste d5(C), Be2 actif, Bg5 actif, paire de fous, colonne d.
Faiblesses adverses : arriéré d6, Be7 enfermé, Bc8 enfermé.
Plans :
● Rd — Tour sur colonne d

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Avantages : majorité centre (2v1), case forte g4, case forte e5, paire de fous, colonne c.
Problèmes : Be7 enfermé, Bc8 enfermé, arriéré d6.
Plans :
● ...Bf5 — Développer Bc8
● ...d5 — Rupture
● ...Rc — Tour sur colonne c

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

B59h — Boleslavsky

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 e5 7.Nb3 Be7 8.O-O O-O 9.Bg5

Eval: [-0.29]

Les coups candidats

9…Nxe4 — 40.0% (84 parties)

Ambassadeurs : Tumurbator, Purev (1x), Padevsky, Nikola (1x), Ivkovic, Dusan (1x), Djurasevic, Bozidar (1x), Cortlever, Nico (1x), Kramer, Hanspeter (1x), Rumens, David E (1x), Velasco Aragones, Enrique (1x)

9…Be6 — 36.2% (76 parties)

Ambassadeurs : Grabics, Monika (2x), Stabolewski, Andreas (2x), Dietrich Norbert (1x), Ornithopoulos, Nikolaos (1x), Asplund, Lennart (1x), Sigurjonsson, Gudmundur (1x), Cock, John Crowle (1x), Hutchings, Stuart J (1x)

9…a5 — 15.7% (33 parties)

Ambassadeurs : Abdel Hamid, Rashad (2x), Kolvig, Bent (1x), Perez Perez, Francisco Jose (1x), Quecke, Kurt (1x), Platz, Hans (1x), Poulin, Simon (1x), Finta, Robert (1x), Milligan, Helen (1x)

9…a6 — 5.2% (11 parties)

Ambassadeurs : Lombart, Philippe (1x), Bourguet, Georges (1x), Betancourt, Pedro Luis (1x), Gonzalez Pedrosa, Juan (1x), Constantin, Florea (1x), Spinoche, Ion (1x), Ye, Ling Feng (1x), Forget, Luc (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	9…Nxe4	9…Be6	9…a5	9…a6
<1800	4	50%	50%	—	—
1800-2200	77	31%	34%	22%	10%
2200-2600	77	53%	38%	9%	—

Évolution par décennie (% des parties)

Décennie	N parties	9…Nxe4	9…Be6	9…a5	9…a6
1940s	1	—	—	—	—
1950s	7	86%	—	14%	—
1960s	3	—	67%	33%	—
1970s	8	—	88%	—	—
1980s	13	54%	23%	15%	8%
1990s	33	36%	27%	27%	6%
2000s	75	35%	41%	12%	8%
2010s	63	48%	33%	16%	3%
2020s	7	43%	43%	14%	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
9…Nxe4	48%	43%	▼ -4.8%
9…Be6	33%	43%	▲ +9.5%
9…a5	16%	14%	▼ -1.6%
9…a6	3%	0%	▼ -3.2%

Parties historiques

9…Nxe4 — 40.0% (84 parties)

1950 — Cortlever, Nico vs Kramer, Hanspeter — 1/2-1/2 — Amsterdam ch-NED
1955 — Weiner, Milan vs Kozma, Julius — 0-1 — Brno CZE
1957 — Yepez, Olavo vs Rannanjarvi — 1-0 — Reykjavik ISL
1958 — Ivkovic, Dusan vs Djurasevic, Bozidar — 1/2-1/2 — Sarajevo ch YUG
1959 — Tumurbator, Purev vs Padevsky, Nikola — 0-1 — Budapest HUN

9…Be6 — 36.2% (76 parties)

1966 — Dietrich Norbert vs Ornithopoulos, Nikolaos — 0-1 — Havana CUB
1967 — Asplund, Lennart vs Sigurjonsson, Gudmundur — 1-0 — Jerusalem ISR
1971 — Cock, John Crowle vs Hutchings, Stuart J — 0-1 — Bristol ENG
1971 — Tabor, Jozsef vs Minev, Nikolay N — 1/2-1/2 — Baja
1972 — Balshan, Amikam vs Balashov, Yuri — 1/2-1/2 — Graz AUT

9…a5 — 15.7% (33 parties)

1953 — Quecke, Kurt vs Platz, Hans — 0-1 — Jena GER
1960 — Kolvig, Bent vs Perez Perez, Francisco Jose — 1/2-1/2 — Leipzig GER
1982 — Milligan, Helen vs Leme, Jussara Chaves Garc — 1-0 — Lucerne SUI
1987 — Poulin, Simon vs Finta, Robert — 1/2-1/2 — Longueuil CAN
1991 — Sasaki, Katsumi vs Wang, Zili — 0-1 — Penang MAS

9…a6 — 5.2% (11 parties)

1989 — Lombart, Philippe vs Bourguet, Georges — 0-1 — Uzes
1998 — Constantin, Florea vs Spinoche, Ion — 0-1 — Techirghiol
1999 — Betancourt, Pedro Luis vs Gonzalez Pedrosa, Juan — 1/2-1/2 — ?
2002 — Nguyen T Quynh, Trang vs Le T Phuong Thao — 1/2-1/2 — Vietnam
2003 — Ye, Ling Feng vs Forget, Luc — 1/2-1/2 — Repentigny CAN

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	● d6
Chaînes	—	● d6→e5
Passés	—	—
Majorité	● aile_dame 3v2	● centre 2v1

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● b5 (2v0), ● d5 (3v1)	● g4 (2v1), ● e5 (2v0)
Cases faibles	● d4	—
Centre	● d5 (3v1)	● e5 (2v0)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● d	● c

Pièces

	♔ Blancs	♚ Noirs
Be2	● Be2 Actif (mob. 7)
Bg5	● Bg5 Actif (mob. 7)
Be7		● Be7 Enfermé (mob. 0)
Bc8		● Bc8 Non développé (mob. 5)
Paire de fous	● Oui	● Oui
Non développées	1 (a1)	2 (c8, a8)

Sécurité du roi

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

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	fermé
Ruptures	● f2-f3	● …d6-d5

Partie
1950 Amsterdam ch-NED – Round 1 – Cortlever, Nico – 1/2-1/2 – Kramer, Hanspeter – G24 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nb3 Be7 8. O-O O-O 9. Bg5 Nxe4 10. Nxe4 Bxg5
1953 GDR Ch – Round 4 – Quecke, Kurt – 0-1 – Platz, Hans – G13 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nb3 Be7 8. Bg5 O-O 9. O-O a5 10. a4 Nb4
1957 WchT U26 04th – Round 6.2 – Yepez, Olavo – 1-0 – Rannanjarvi – G74 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nb3 Be7 8. O-O O-O 9. Bg5 Nxe4 10. Nxe4 Bxg5
1958 Sarajevo ch YUG – Round 15 – Ivkovic, Dusan – 1/2-1/2 – Djurasevic, Bozidar – G20 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nb3 Be7 8. O-O O-O 9. Bg5 Nxe4 10. Nxe4 Bxg5
1960 Leipzig olm fin-B – Round 4 – Kolvig, Bent – 1/2-1/2 – Perez Perez, Francisco Jose – G46 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nb3 Be7 8. Bg5 O-O 9. O-O a5 10. a3 Be6
1967 Wch U20 qual-A – Round 3 – Asplund, Lennart – 1-0 – Sigurjonsson, Gudmundur – G4 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nb3 Be7 8. O-O O-O 9. Bg5 Be6 10. Qd2 a5

1950 Amsterdam ch-NED – Round 1 – Cortlever, Nico – 1/2-1/2 – Kramer, Hanspeter – G24

1953 GDR Ch – Round 4 – Quecke, Kurt – 0-1 – Platz, Hans – G13

1957 WchT U26 04th – Round 6.2 – Yepez, Olavo – 1-0 – Rannanjarvi – G74

1958 Sarajevo ch YUG – Round 15 – Ivkovic, Dusan – 1/2-1/2 – Djurasevic, Bozidar – G20

1960 Leipzig olm fin-B – Round 4 – Kolvig, Bent – 1/2-1/2 – Perez Perez, Francisco Jose – G46

1967 Wch U20 qual-A – Round 3 – Asplund, Lennart – 1-0 – Sigurjonsson, Gudmundur – G4