B59n — Sicilian: Boleslavsky, 7.Nb3 Be7 8.O-O O-O 9.Be3 a5

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.Be3 a5 * ○ Trait aux Blancs

Ouverture — Centre fermé

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plan principal. Exploiter la case forte d5.

Atouts. Les Blancs s'appuient sur une majorité de pions à l'aile_dame (3 contre 2), les cases fortes b5 et d5, un avant-poste en d5, des fous actifs en e2 et e3, la paire de fous et la colonne semi-ouverte d.

Côté adverse. Le pion arriéré d6 et les fous enfermés en e7 et c8.

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plan principal. Exploiter la case forte b4.

Atouts. Les Noirs s'appuient sur une majorité de pions à l'centre (2 contre 1), les cases fortes b4 et g4, un avant-poste en b4, la paire de fous et la colonne semi-ouverte c.

En contrepartie. Plusieurs pièces dorment encore (le fou c8 et la tour a8) et le pion arriéré d6.

Plans. ...d5 (Rupture).

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

	♔ 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)	● b4 (2v0), ● g4 (2v1)
Cases faibles	● d4	—
Centre	● d4 (3v2), ● d5 (3v1)	● e5 (2v0)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● d	● c

Pièces

	♔ Blancs	♚ Noirs
Be2	● Be2 Actif (mob. 7)
Be3	● Be3 Actif (mob. 9)
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
1949 AUT-CSR Vienna AUT – Round 1 – Busek, Hans – 0-1 – Sajtar, Jaroslav – 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. Be3 a5 10. f3 a4
1949 Zagreb – Round 17 – Tot, Bora – 0-1 – Janosevic, Dragoljub – 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 a5 9. Be3 O-O 10. f3 a4
1951 YUG Ch 7th – Round 15 – Janosevic, Dragoljub – 1/2-1/2 – Bajec, Ivo – G127 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. Be3 a5 10. f3 a4
1952 Budapest – Round 14 – Pilnik, Herman – 1/2-1/2 – Kottnauer, Cenek – G128 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nb3 Be7 8. O-O a5 9. Be3 O-O 10. Nd2 Nd4
1952 Liberation – Round 14 – Janosevic, Dragoljub – 0-1 – Fuderer, Andrija – G40 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. Be3 a5 10. Nd2 Be6
1952 Saltsjobaden Interzonal – Round 8 – Pilnik, Herman – 1/2-1/2 – Szabo, Laszlo – G73 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nb3 Be7 8. Be3 O-O 9. O-O a5 10. Bf3 Be6
1953 Opatija – Round 2 – Matanovic, Aleksandar – 1/2-1/2 – Unzicker, Wolfgang – G22 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. Be3 a5 10. Nd2 d5
1954 Munich zt Munich GER – Round 1 – Unzicker, Wolfgang – 1/2-1/2 – Lehmann, Karl-Heinz – G1 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. Be3 a5 10. Nd2 Be6
1954 Pan American Ch 2nd – Round 1 – Bisguier, Arthur B – 1/2-1/2 – Rossolimo, Nicolas – G11 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. Be3 a5 10. Nd2 Rb8
1955 Clare Benedict Cup – Round 4.2 – Castaldi, Vincenzo – 1-0 – Platt, Josef – G26 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. Be3 a5 10. Bf3 a4
1955 URS Ch sf – Round 1 – Cherepkov, Alexander V – 0-1 – Vladimirov, Boris T – G42 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. Be3 a5 10. f3 a4
1956 Moscow Ch – Round 1 – Petrosian, Tigran A. – 1/2-1/2 – Osnos, Viatcheslav – G3 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nb3 Be7 8. Be3 O-O 9. O-O a5 10. Bf3 Be6
1957 Madrid – Round 9 – Unzicker, Wolfgang – 1-0 – Franco Raymundo, Eduardo – G37 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. Be3 a5 10. Nd2 d5
1957 Mar del Plata – Round 6 – Mangini, Jose Henrique de Mello – 0-1 – Panno, Oscar – G65 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. Be3 a5 10. a3 Be6
1958 Mar del Plata – Round 5 – Lombardy, William J – 1/2-1/2 – Panno, Oscar – G39 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. Be3 a5 10. f3 Be6
1959 Marianske Lazne – Round 9 – Glass, Eduard – 0-1 – Minev, Nikolay N – G65 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nb3 Be7 8. Be3 O-O 9. O-O a5 10. Nd2 Rb8
1959 Quilmes – Round 4 – Piazzini, Luis – 1/2-1/2 – Sanguinetti, Raul – G36 1. e4 c5 2. Ne2 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nb3 Be7 8. Be3 O-O 9. O-O a5 10. Nd2 d5
1960 Nimzowitsch Memorial – Round ? – Enevoldsen, Jens – 1/2-1/2 – Holm, Sejer – G42 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. Be3 a5 10. a3 Be6
1960 Sofia ch BUL – Round 14 – Dimitrov, Krastjo – 1/2-1/2 – Minev, Nikolay N – G15 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nb3 Be7 8. Be3 O-O 9. O-O a5 10. a3 Be6
1962 London Boys U18 Ch – Round 1 – Collins, Richard Arnold – 1-0 – Bindefeld, David M – G1 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Be3 e5 7. Nb3 Be7 8. Be2 O-O 9. O-O a5 10. f4 a4
1962 Varna olm – Round ? – De Loughry, Desmond – 1/2-1/2 – Petersen, Finn – G476 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nb3 Be7 8. Be3 O-O 9. O-O a5 10. f4 a4
1965 Titograd – Round 18 – Nikolic, Stanimir – 0-1 – Gligorić, Svetozar – G128 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. Be3 a5 10. a3 Be6
1965 WchT U26 12. fin-B – Round 5 – Dahl Schutt, Frederik – 0-1 – Spassov, Liuben – G17 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. Be3 a5 10. a3 Be6
1966 CSR Ch Int 1st – Round 12 – Janosevic, Dragoljub – 1/2-1/2 – Padevsky, Nikola – G67 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. Be3 a5 10. Nd5 Nxe4
1966 La Habana olm prel – Round 3 – Bakali Ahmed – 0-1 – Ghitescu, Theodor – G99 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Be2 e5 7. Nb3 Be7 8. Be3 O-O 9. O-O a5 10. a3 a4
1966 Mar del Plata – Round 2 – Pilnik, Herman – 0-1 – Schweber, Samuel – G16 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. Be3 a5 10. Nd2 d5
1966 URS Team Ch – Round ? – Borisenko, Georgy K – 1/2-1/2 – Golovey, Tamara O – G29 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. Be3 a5 10. a3 a4
1967 Skopje – Round 4 – Janosevic, Dragoljub – 1/2-1/2 – Sofrevski, Jovan – G34 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. Be3 a5 10. f3 a4
1968 Capablanca Memorial – Round 1 – Ostojic, Predrag – 0-1 – Drimer, Dolfi – G50 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be3 e5 7. Nb3 Be7 8. Be2 O-O 9. O-O a5 10. a3 Be6
London 1984 – Round 1 – Ljubojevic, Ljubomir – 1/2-1/2 – Tukmakov, Vladimir B – G10 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. Be3 a5 10. Nd2 Be6
USR - Wereld 1984 – Round 1 – Ljubojevic, Ljubomir – 1/2-1/2 – Tukmakov, Vladimir B – G6 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. Be3 a5 10. Nd2 Be6

B59n — 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.Be3 a5

Eval: [+0.06]

Les coups candidats

10.a4 — 50.2% (544 parties) →

Ambassadeurs : Rusev, Krasimir (8x), Madl, Ildiko (6x), Grosar, Kiti (5x), Martin Del Campo Cardenas, Roberto Abel (4x), Wagner-Michel, Annett (3x), Sulek, Viliam (3x), Biliskov, Vjekoslav (3x), Pergel, Laszlo (3x)

10.Nd2 — 15.0% (162 parties)

Ambassadeurs : Unzicker, Wolfgang (3x), Berczes, Csaba (3x), Pilnik, Herman (2x), Mladenovic, Jakov (2x), Seres, Lajos (2x), Bensdorp, Laura (2x), Nijboer, Friso (2x), Seleljo, Daniel (2x)

10.a3 — 10.3% (112 parties)

Ambassadeurs : Golovey, Tamara O (2x), Lavin, David (2x), Guimaraes, Claudio (2x), Fernando, Diogo (2x), Andrijevic, Milan (2x), Mertens, Paul (1x), Kasanen, Juha (1x), Bakali Ahmed (1x)

10.f3 — 8.9% (96 parties)

Ambassadeurs : Janosevic, Dragoljub (4x), Andrijevic, Milan (3x), Busek, Hans (1x), Sajtar, Jaroslav (1x), Tot, Bora (1x), Sofrevski, Jovan (1x), Cherepkov, Alexander V (1x), Vladimirov, Boris T (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	10.a4	10.Nd2	10.a3	10.f3
<1800	22	59%	18%	—	9%
1800-2200	433	52%	10%	12%	10%
2200-2600	381	49%	21%	9%	8%
2600+	2	50%	50%	—	—

Évolution par décennie (% des parties)

Décennie	N parties	10.a4	10.Nd2	10.a3	10.f3
1940s	6	17%	—	—	33%
1950s	28	25%	29%	7%	14%
1960s	30	30%	10%	37%	3%
1970s	44	45%	9%	14%	11%
1980s	78	46%	26%	8%	5%
1990s	221	53%	15%	11%	7%
2000s	327	55%	14%	9%	9%
2010s	306	50%	13%	11%	10%
2020s	43	47%	19%	—	9%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
10.a4	50%	47%	▼ -3.2%
10.Nd2	13%	19%	▲ +5.2%
10.a3	11%	0%	▼ -10.8%
10.f3	10%	9%	▼ -0.8%

Joueurs célèbres

Champions du monde dans cette position

Carlsen, Magnus — 1 partie
Ju, Wenjun — 1 partie

Parties historiques

10.a4 — 50.2% (544 parties)

1949 — Kaliwoda, Kurt vs Rabar, Braslav — 0-1 — Vienna AUT
1951 — Nedeljkovic, Srecko M vs Milic, Borislav — 1-0 — Sarajevo BIH
1952 — Kirchhammer, Rudolf vs Platz, Hans — 0-1 — Binz GER
1952 — Aleman Dovo, Miguel vs Gligorić, Svetozar — 0-1 — Havana CUB
1953 — Belkadi, Ridha vs Raizman, Maurice — 1-0 — Paris FRA

10.Nd2 — 15.0% (162 parties)

1952 — Pilnik, Herman vs Kottnauer, Cenek — 1/2-1/2 — Budapest HUN
1952 — Janosevic, Dragoljub vs Fuderer, Andrija — 0-1 — Belgrade SRB
1953 — Matanovic, Aleksandar vs Unzicker, Wolfgang — 1/2-1/2 — Opatija
1954 — Bisguier, Arthur B vs Rossolimo, Nicolas — 1/2-1/2 — Los Angeles, CA USA
1954 — Unzicker, Wolfgang vs Lehmann, Karl-Heinz — 1/2-1/2 — Munich zt Munich GER

10.a3 — 10.3% (112 parties)

1950 — Aitken, James vs Barden, Leonard — 0-1 — Oxford?
1957 — Mangini, Jose Henrique de Mello vs Panno, Oscar — 0-1 — Mar del Plata ARG
1960 — Enevoldsen, Jens vs Holm, Sejer — 1/2-1/2 — Copenhagen DEN
1960 — Dimitrov, Krastjo vs Minev, Nikolay N — 1/2-1/2 — Sofia ch BUL
1961 — Milev, Angel vs Milev, Zdravko — 1/2-1/2 — Sofia BUL

10.f3 — 8.9% (96 parties)

1949 — Busek, Hans vs Sajtar, Jaroslav — 0-1 — AUT-CSR Vienna AUT
1949 — Tot, Bora vs Janosevic, Dragoljub — 0-1 — Zagreb CRO
1951 — Janosevic, Dragoljub vs Bajec, Ivo — 1/2-1/2 — Sarajevo BIH
1955 — Cherepkov, Alexander V vs Vladimirov, Boris T — 0-1 — Moscow RUS
1958 — Lombardy, William J vs Panno, Oscar — 1/2-1/2 — Mar del Plata ARG

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