B58g — Sicilian: Boleslavsky, Louma Variation

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 e5 7.Nxc6 bxc6 * ○ Trait aux Blancs

Ouverture — Centre fermé

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Avantages : majorité aile_dame (3v2), Be2 actif, paire de fous, colonne d.
Faiblesses adverses : isolé a7, Bc8 enfermé, Bf8 enfermé, roi noir au centre.
Problèmes : roi au centre, Bc1 enfermé, 3 pièces non développées (C1, A1, H1).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● Bg5 — Clouer Nf6
● 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, paire de fous, colonne b.
Faiblesses adverses : Bc1 enfermé, roi blanc au centre.
Problèmes : roi au centre, Bc8 enfermé, Bf8 enfermé, isolé a7, 4 pièces non développées (C8, F8, A8, H8).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● ...Bf5 — Développer Bc8
● ...Be7 — Développer Bf8
● ...c5 — Rupture
● ...d5 — Rupture

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

B58g — Boleslavsky Louma Variation

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 e5 7.Nxc6 bxc6

Eval: [+0.15]

Les coups candidats

8.O-O — 63.0% (216 parties)

Ambassadeurs : Kramer, Hanspeter (4x), Barden, Leonard (3x), Bouwmeester, Hans (2x), Kramer, Haije (2x), Lokvenc, Josef (2x), Paoli, Enrico (2x), Penrose, Justin (2x), Mednis, Edmar J (2x)

8.Qd3 — 19.8% (68 parties)

Ambassadeurs : Lanc, Alois (5x), Hort, Vlastimil (4x), Louma, Josef (3x), Acevedo Ortega, Rodrigo Andres (3x), Rabar, Braslav (2x), Foguelman, Alberto (2x), Hýbl, Jaroslav (2x), Winiwarter, Felix (2x)

8.Bg5 — 9.6% (33 parties)

Ambassadeurs : Martin Gonzalez, Angel (1x), Yanofsky, Daniel Abraham (1x), Martin, Raymond (1x), Cunningham, Walter (1x), Forgie, Don (1x), Dodge, Robert (1x), Lopes, Marcelo Ferreira (1x), Della Morte, Pablo (1x)

8.Be3 — 2.9% (10 parties)

Ambassadeurs : Ventimiglia, Charles (2x), Powell, Lisa (1x), Lewis, Scott (1x), Barrett, Trevor (1x), Dethlefsen O (1x), Krueger, Aidan (1x), Bass Stanley (1x), Tyda, Beata (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	8.O-O	8.Qd3	8.Bg5	8.Be3
<1800	5	100%	—	—	—
1800-2200	115	63%	16%	15%	3%
2200-2600	84	68%	23%	5%	—
2600+	1	100%	—	—	—

Évolution par décennie (% des parties)

Décennie	N parties	8.O-O	8.Qd3	8.Bg5	8.Be3
1940s	9	—	89%	11%	—
1950s	39	69%	21%	—	—
1960s	18	33%	56%	6%	—
1970s	10	90%	10%	—	—
1980s	23	57%	35%	—	—
1990s	62	68%	10%	11%	6%
2000s	68	66%	12%	15%	6%
2010s	96	60%	19%	14%	2%
2020s	18	89%	6%	6%	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
8.O-O	60%	89%	▲ +28.5%
8.Qd3	19%	6%	▼ -13.2%
8.Bg5	14%	6%	▼ -8.0%
8.Be3	2%	0%	▼ -2.1%

Joueurs célèbres

Champions du monde dans cette position

Euwe, Max — 1 partie
Smyslov, Vladimir — 1 partie

Parties historiques

8.O-O — 63.0% (216 parties)

1951 — Bogoljubow, Efim vs Gligorić, Svetozar — 0-1 — Birmingham ENG
1952 — Morel, Fernand vs Boleslavsky, Isaac — 0-1 — Helsinki olm
1952 — Bergqvist, Nils vs Poulsen, Christian — 1-0 — radio
1952 — Bhend, Edwin vs Kramer, Hanspeter — 1-0 — Helsinki FIN
1953 — Donner, Jan-Hein vs Hein-Trott, H — 1-0 — Beverwijk Beverwijk NED

8.Qd3 — 19.8% (68 parties)

1948 — Louma, Josef vs Kottnauer, Cenek — 0-1 — Bratislava SVK
1948 — Louma, Josef vs Foltys, Jan — 1-0 — Bratislava SVK
1948 — Janosevic, Dragoljub vs Rabar, Braslav — 1/2-1/2 — Belgrade SRB
1949 — Unzicker, Wolfgang vs Kramer, Haije — 1/2-1/2 — Lucerne SUI
1949 — Unzicker, Ferdinand, Dr. vs Rabar, Braslav — 1/2-1/2 — Lucerne SUI

8.Bg5 — 9.6% (33 parties)

1946 — Martin Gonzalez, Angel vs Yanofsky, Daniel Abraham — 0-1 — Arbon
1961 — Martin, Raymond vs Cunningham, Walter — 0-1 — Los Angeles, CA USA
1992 — Scagliarini, V. vs Gramignani, Rita — 0-1 — Formia ch-ITA wmn
1994 — Psychogios, Antonios vs Ferret Diaz, Adria — 0-1 — London ENG
1995 — Forgie, Don vs Dodge, Robert — 0-1 — ?

8.Be3 — 2.9% (10 parties)

1994 — Dethlefsen O vs Krueger, Aidan — 0-1 — GER
1996 — Powell, Lisa vs Lewis, Scott — 1/2-1/2 — corr IECC CL3-MIN
1997 — Ventimiglia, Charles vs Bass Stanley — 1-0 — IECC
1998 — Ventimiglia, Charles vs Barrett, Trevor — 1-0 — ?
2001 — Nagy, Erika-Izabella vs Tutulan, Mihaela — 0-1 — Tusnad

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	● a7
Arriérés	—	—
Chaînes	—	● d6→e5
Passés	—	—
Majorité	● aile_dame 3v2	● centre 2v1

Cases

	♔ Blancs	♚ Noirs
Cases fortes	—	● g4 (2v1)
Cases faibles	—	—
Centre	● d5 (3v2)	● e5 (1v0)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● d	● b

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Be2	● Be2 Actif (mob. 8)
Bc8		● Bc8 Non développé (mob. 7)
Bf8		● Bf8 Non développé (mob. 1)
Paire de fous	● Oui	● Oui
Non développées	3 (c1, a1, h1)	4 (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	fermé
Ruptures	● f2-f3	● …c6-c5, ● …d6-d5

Partie
1946 Arbon – Round 7 – Martin Gonzalez, Angel – 0-1 – Yanofsky, Daniel Abraham – G12 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. Bg5 Be7 9. O-O h6 10. Bh4 O-O
1948 Belgrade – Round 4 – Janosevic, Dragoljub – 1/2-1/2 – Rabar, Braslav – G6 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. Qd3 Be7 9. O-O O-O 10. f4 Nd7
1948 CSR Ch – Round 7 – Louma, Josef – 1-0 – Foltys, Jan – G6 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. Qd3 Be7 9. O-O O-O 10. Rd1 Nd7
1948 CSR Ch – Round 8 – Louma, Josef – 0-1 – Kottnauer, Cenek – G7 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. Qd3 Be7 9. O-O O-O 10. Rd1 Qc7
1949 URS Ch, semi final – Round 15 – Rovner, Dmitry – 0-1 – Kopaev, Nikolay A – G111 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. Qd3 Be7 9. O-O O-O 10. Rd1 Nd7
1949 URS Ch, semi final – Round 5 – Grechkin, Dmitry M – 1/2-1/2 – Ilivitsky, Georgy A – G50 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. Qd3 Be7 9. O-O O-O 10. Rd1 Nd7
1951 Bucharest GMT 2nd – Round 11 – Samarian, Sergiu – 0-1 – Pietzsch, Wolfgang – G45 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. Qd3 Be6 9. Qg3 Be7 10. O-O O-O
1951 Staunton Memorial – Round 5 – Bogoljubow, Efim – 0-1 – Gligorić, Svetozar – G40 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. O-O Be7 9. Qd3 Nd7 10. Qg3 O-O
1952 Helsinki olm – Round 1 – Bhend, Edwin – 1-0 – Kramer, Hanspeter – G127 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. O-O Be7 9. f4 O-O 10. Kh1 Nd7
1952 Helsinki olm – Round 1 – Morel, Fernand – 0-1 – Boleslavsky, Isaac – G160 1. e4 c5 2. d4 cxd4 3. Nf3 Nc6 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. O-O Be7 9. Bc4 O-O 10. Qe2 Qc7
1953 Hoogovens – Round 9 – Trott, A H – 0-1 – Kramer, Hanspeter – G51 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. O-O Be7 9. f4 Nd7 10. f5 Nf6
1953 Paris – Round 9 – Noradounghian, Georges – 0-1 – Raizman, Maurice – G24 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. O-O Be7 9. Qd3 O-O 10. f4 exf4
1954 Amsterdam olm – Round 1 – Kramer, Hanspeter – 1/2-1/2 – Lokvenc, Josef – G52 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. O-O Be7 9. f4 O-O 10. Kh1 Qb6
1954 Amsterdam olm – Round 1 – Kremer, Paul – 0-1 – Barden, Leonard – G53 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Nxc6 bxc6 7. Be2 e5 8. O-O Be7 9. Be3 O-O 10. Bf3 Be6
1954 Olympiad final A – Round 1 – Darga, Klaus – 0-1 – Kramer, Hanspeter – G66 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Be2 e5 7. Nxc6 bxc6 8. f4 Be7 9. O-O O-O 10. Kh1 Nd7
1954 Olympiad prel I – Round 1 – Kramer, Hanspeter – 1/2-1/2 – Fred, Aatos – G15 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. O-O Be7 9. f4 O-O 10. fxe5 dxe5
1954 Olympiad prel I – Round 5 – Kramer, Haije – 1/2-1/2 – Lokvenc, Josef – G19 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. O-O Be7 9. f4 O-O 10. Kh1 Qb6
1954 Zuerich – Round 11 – Walther, Edgar – 1/2-1/2 – Euwe, Max – G33 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. Qd3 Nd7 9. Qg3 Nc5 10. f4 exf4
1955 Buenos Aires CA – Round 12 – Reinhardt, Enrique – 0-1 – Pilnik, Herman – G89 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. O-O Be7 9. f4 O-O 10. Qd3 Nd7
1955 CSR Ch Army – Round 11 – Skacel, Jan – 1/2-1/2 – Kozma, Julius – G14 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. Qd3 Be7 9. O-O O-O 10. f4 exf4
1955 Gothenburg Interzonal – Round 15 – Acuna Medina, Angel G. – 0-1 – Pachman, Ludek – G142 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. O-O Be7 9. f4 Qc7 10. Qd3 O-O
1955 Hastings5556 – Round 3 – Fuller, Jack – 0-1 – Taimanov, Mark E – G12 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. O-O Be7 9. Qd3 O-O 10. f4 Nd7
1955 Marshall CC Ch 5556 – Round 15 – Mednis, Edmar J – 1/2-1/2 – Saidy, Anthony – G39 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. O-O Be7 9. Kh1 O-O 10. f4 Nd7
1956 Copenhagen – Round 9 – Fuchs, Reinhart – 1/2-1/2 – Bouwmeester, Hans – G44 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. O-O Be7 9. f4 O-O 10. Kh1 Qc7
1956 Danmarksmesterskabet – Round 10 – Poulsen, Christian – 1/2-1/2 – Andersen, Borge – G25 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. f4 Qb6 9. Qd3 Be7 10. Be3 Qxb2
1957 Leningrad Ch – Round 5 – Ravinsky, Grigory – 1/2-1/2 – Suetin, Alexey S – G39 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. Qd3 Be7 9. O-O O-O 10. Bg5 Rb8
1958 Argentina – Round 7 – Puiggros, Guillermo – 0-1 – Pilnik, Herman – G58 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. O-O Be7 9. b3 O-O 10. Qe1 d5
1958 New York ch-USA – Round 10 – Mednis, Edmar J – 0-1 – Byrne, Ray – G50 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. O-O Be7 9. Kh1 O-O 10. f4 a5
1959 Argentina – Round 4 – Foguelman, Alberto – 1/2-1/2 – Marini, Luis – G21 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. Qd3 Be7 9. Qg3 O-O 10. O-O Nd7
1959 Buenos Aires Ch – Round 4 – Foguelman, Alberto – 0-1 – Emma, Jaime – G14 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. Qd3 Be7 9. Qg3 O-O 10. O-O Ne8
1959 Clare Benedict Cup 06th – Round 1.3 – Cortlever, Nico – 1-0 – Paoli, Enrico – G6 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. O-O Be7 9. f4 O-O 10. fxe5 dxe5
1960 URS-BRD – Round 6 – Bialas, Wolfram – 1/2-1/2 – Boleslavsky, Isaac – G15 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. f4 Qc7 9. O-O Be7 10. Qd3 O-O
1961 Helsinki – Round 1 – Moehring, Guenther – 0-1 – Brinck-Claussen, Bjorn – G4 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. O-O Be7 9. f4 O-O 10. Qd3 Nd7
1962 Asztalos Memorial 5th – Round 1 – Honfi, Karoly – 1-0 – Paoli, Enrico – G6 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. Qd3 Be7 9. Qg3 O-O 10. O-O Rb8
1962 CSR Ch – Round 3 – Hort, Vlastimil – 1-0 – Hýbl, Jaroslav – G23 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. Qd3 Be7 9. Qg3 O-O 10. O-O Nd7
1962 Mar del Plata – Round 12 – Penrose, Justin – 0-1 – Panno, Oscar – G105 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. O-O Be7 9. f4 exf4 10. Bxf4 O-O
1962 Moscow RUS – Round 1 – Hort, Vlastimil – 1-0 – Shamkovich, Leonid – G10 1. e4 c5 2. Nc3 Nc6 3. Nf3 Nf6 4. d4 cxd4 5. Nxd4 d6 6. Be2 e5 7. Nxc6 bxc6 8. Qd3 Be7 9. Qg3 O-O 10. O-O Be6
1963 Capablanca Memorial – Round 7 – Acevedo Ortega, Rodrigo Andres – 0-1 – Geller, Efim P – G66 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. Qd3 Be7 9. O-O O-O 10. Rd1 Be6
1963 CSR Ch – Round 14 – Hort, Vlastimil – 1/2-1/2 – Hýbl, Jaroslav – G128 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. Qd3 Be7 9. Qg3 O-O 10. O-O Nd7
1964 Capablanca Memorial – Round 14 – Acevedo Ortega, Rodrigo Andres – 0-1 – Donner, H. – G141 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. Qd3 Be7 9. O-O O-O 10. Rd1 Qc7
1964 Capablanca Memorial – Round 21 – Acevedo Ortega, Rodrigo Andres – 0-1 – Smyslov, Vladimir – G213 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. Qd3 Be7 9. O-O O-O 10. Rd1 Nd7
1966 La Habana olm prel – Round 4 – Tarazi, Andre – 0-1 – Bouwmeester, Hans – G153 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. O-O Be7 9. Bg5 O-O 10. Qd2 h6
1968 ITA Ch Milan ITA – Round 1 – Siveri, Armando – 0-1 – Paoli, Enrico – G8 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. O-O Be7 9. b3 O-O 10. Bf3 Be6
1969 Zagreb – Round 9 – Hort, Vlastimil – 1-0 – Saidy, Anthony – G63 1. e4 c5 2. Nc3 Nc6 3. Nge2 d6 4. d4 cxd4 5. Nxd4 Nf6 6. Be2 e5 7. Nxc6 bxc6 8. Qd3 Be7 9. Qg3 O-O 10. O-O Kh8
1974 Manila – Round 1 – Winston, Peter J – 0-1 – Schneider, Lars-Ake – G101 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. O-O Be7 9. f4 O-O 10. Kh1 Nd7
Smyslov Region Group Cup 2021 – Round 1.7 – Paravyan, David – 1-0 – Ponkratov, Pavel – G8 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 bxc6 8. O-O Be7 9. Kh1 O-O 10. f4 Rb8

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