B28g — Sicilian: O’Kelly, 3.c4 e6

1.e4 c5 2.Nf3 a6 3.c4 e6 * ○ Trait aux Blancs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

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Plans. Nc3 (Développer b1 — 73 % des parties) ; d4 (Occuper le centre — 24 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

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Plans. ...Qc7 (Prépare O-O-O — 39 % des parties) ; ...Nc6 (Développer b8 — 18 % des parties) ; ...d6 (Libérer Bc8 — 12 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	—	● b7→a6, d7→e6, f7→e6
Passés	—	—
Majorité	—	—

Cases

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

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bf1	● Bf1 Non développé (mob. 2)
Bc8		● Bc8 Non développé (mob. 0)
Bf8		● Bf8 Non développé (mob. 2)
Paire de fous	● Oui	● Oui
Non développées	5 (● b1, ● 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	● …d7-d5, ● …f7-f5

Partie
1922 London BCF Congress – Round 2 – Euwe, Max – 0-1 – Tartakower, Savielly – G3 1. e4 c5 2. Nf3 a6 3. c4 e6 4. Nc3 Nc6 5. d4 cxd4 6. Nxd4 Qc7 7. Be2 Nf6 8. Be3 Bb4 9. f3 O-O 10. O-O Bxc3
1948 Buenos Aires – Round 1 – Acebey Michel, Veroska – 1/2-1/2 – O'Kelly de Galway, Alberic – G14 1. e4 c5 2. Nf3 a6 3. c4 e6 4. Nc3 Qc7 5. d4 cxd4 6. Nxd4 b6 7. Bd3 Nc6 8. Nxc6 dxc6 9. O-O e5 10. Be3 Nf6
1951 Simul Prins clock – Round ? – Levin, Eugene – 1-0 – Prins, Lodewijk – G5 1. e4 c5 2. Nf3 a6 3. c4 e6 4. Nc3 Nf6 5. e5 Ng8 6. d4 cxd4 7. Nxd4 Nc6 8. Nxc6 dxc6 9. Qxd8+ Kxd8 10. Be3 Kc7
1955 HUN Ch 11th – Round ? – Foldi, Jozsef – 1/2-1/2 – Portisch, Lajos – G8 1. e4 c5 2. Nf3 a6 3. c4 e6 4. Nc3 Qc7 5. Be2 Nc6 6. O-O Nf6 7. d4 cxd4 8. Nxd4 Bb4 9. Nxc6 dxc6 10. a3 Bxc3
1957 Moskou ch-URS – Round 5 – Stolyar, E. – 1/2-1/2 – Taimanov, Mark E – G51 1. e4 c5 2. Nf3 a6 3. c4 e6 4. Nc3 Qc7 5. Be2 Nf6 6. O-O Nc6 7. a3 Nd4 8. h3 Be7 9. d3 O-O 10. Be3 Nxe2+
1957 Przepiorka Memorial – Round 8 – Szukszta, Janus – 0-1 – Kholmov, Ratmir D – G50 1. e4 c5 2. Nf3 e6 3. c4 a6 4. a3 Nc6 5. d4 cxd4 6. Nxd4 Nf6 7. Nc3 Be7 8. Be2 O-O 9. O-O d6 10. Be3 Bd7
1959 GDR Ch Leipzig GER – Round 12 – Pietzsch, Wolfgang – 1-0 – Fuchs, Reinhart – G58 1. e4 c5 2. Nf3 a6 3. c4 e6 4. Nc3 Nc6 5. d4 cxd4 6. Nxd4 Bb4 7. Nxc6 dxc6 8. Qxd8+ Kxd8 9. Bf4 Bxc3+ 10. bxc3 Nf6
1960 Mar del Plata – Round 11 – Eliskases, Erich – 1/2-1/2 – Aguilera Bazan, Oscar – G90 1. e4 c5 2. Nf3 a6 3. c4 e6 4. Nc3 Qc7 5. g3 Nc6 6. Bg2 Nd4 7. O-O Ne7 8. d3 Nec6 9. Nxd4 cxd4 10. Ne2 Be7
1961 Katowice ch18-POL – Round 16 – Lachut, Jan – 0-1 – Brzozka, Stefan – G92 1. e4 c5 2. Nf3 a6 3. c4 e6 4. Nc3 Nc6 5. d4 cxd4 6. Nxd4 Qc7 7. f4 Qb6 8. Nb3 Na5 9. Nxa5 Qxa5 10. Be3 Nf6
1962 Asztalos Memorial 5th – Round 15 – Fazekas, Stephan – 0-1 – Robatsch, Karl – G112 1. e4 c5 2. Nf3 a6 3. c4 e6 4. Nc3 Nc6 5. d4 cxd4 6. Nxd4 Bb4 7. Ne2 Nf6 8. a3 Be7 9. Nf4 O-O 10. Be3 Qa5
1963 Capablanca Memorial – Round 17 – Broderman, Jose – 1/2-1/2 – O'Kelly, Albéric de Galway – G161 1. e4 c5 2. Nf3 a6 3. c4 e6 4. Nc3 Nc6 5. d4 cxd4 6. Nxd4 Qc7 7. Be2 Nf6 8. Nc2 d6 9. O-O Be7 10. Bf4 Ne5
1963 Sao Paulo – Round 4 – Albuquerque Ferreira, Priscila – 0-1 – Schweber, Samuel – G8 1. e4 c5 2. Nf3 a6 3. c4 e6 4. Nc3 Nc6 5. d4 cxd4 6. Nxd4 Qc7 7. Be2 Bb4 8. Nc2 Bxc3+ 9. bxc3 Nf6 10. f3 O-O
1964 Corr FS – Round 1 – Dubinin, Peter – 0-1 – Arnlind, Eric – G11 1. e4 c5 2. Nf3 a6 3. c4 e6 4. Nc3 Nc6 5. d4 cxd4 6. Nxd4 Qc7 7. Be3 Nf6 8. a3 d6 9. Be2 Be7 10. O-O O-O
1964 Zuerich-J Zurich SUI – Round ? – Glauser, Hansruediger – 0-1 – Janata, Michael – G14 1. e4 c5 2. Nf3 a6 3. c4 e6 4. Nc3 Nc6 5. d4 cxd4 6. Nxd4 Qc7 7. Be3 Nf6 8. Be2 Bb4 9. Nxc6 bxc6 10. O-O O-O
1966 Helsinki – Round 6 – Westerinen, Heikki M.J. – 0-1 – Taimanov, Mark E – G27 1. e4 c5 2. Nf3 a6 3. c4 e6 4. Nc3 Qc7 5. Be2 Nc6 6. d4 cxd4 7. Nxd4 Nf6 8. Be3 Bb4 9. Qc2 Ne5 10. Bd2 O-O
1966 La Habana olm fin-B – Round 8 – Witt, Leslie – 0-1 – Prins, Lodewijk – G32 1. e4 c5 2. Nf3 a6 3. c4 e6 4. Nc3 Nf6 5. d3 Nc6 6. g3 d5 7. Bg5 dxe4 8. dxe4 Be7 9. Qxd8+ Bxd8 10. O-O-O Bd7
1966 Tbilisi ch-URS – Round 21 – Lein, Andreas – 1/2-1/2 – Taimanov, Mark E – G193 1. e4 c5 2. Nf3 a6 3. c4 e6 4. Nc3 Qc7 5. Be2 Nc6 6. d4 cxd4 7. Nxd4 Nf6 8. a3 Be7 9. Be3 O-O 10. Rc1 b6
1968 Lugano ol (Men) fin-B – Round 1 – Prins, Laura – 1-0 – Aguilera Rocha, Angelina – G6 1. e4 c5 2. Nf3 a6 3. c4 e6 4. Nc3 Nc6 5. d4 cxd4 6. Nxd4 Qc7 7. Be2 Nf6 8. Nc2 Be7 9. O-O d6 10. Be3 O-O
GMA 2003 – Round 5 – Polgar, Judit – 1/2-1/2 – Ivanchuk, Vasyl – G28 1. e4 c5 2. Nf3 a6 3. c4 e6 4. Nc3 Nf6 5. Be2 Nc6 6. d4 cxd4 7. Nxd4 Qc7 8. O-O Nxd4 9. Qxd4 Bc5 10. Qd3 b6
Lindores Abbey Tal Memorial 2021 – Round 15.38 – Rakhmanov, Aleksandr – 0-1 – Javakhishvili, Lela – G660 1. c4 e6 2. e4 c5 3. Nf3 a6 4. Nc3 Qc7 5. Be2 b6 6. O-O Bb7 7. d3 d6 8. a3 Nf6 9. b4 Be7 10. Bb2 O-O

B28g — Maróczy Bind, Paulsen Line (1922)

1.e4 c5 2.Nf3 a6 3.c4 e6

Les coups candidats

4.Nc3 — 73.2% (2217 parties)

Ambassadeurs : Csom, Istvan (16x), Meshcheriakova, Evgenia (13x), Cordova, Emilio (10x), Joksic, Sinisa (8x), Eingorn, Vereslav S (8x), Porubszky-Angyalosine, Maria (7x), Jurkovic, Hrvoje (7x), Koneru, Humpy (6x)

4.d4 — 23.8% (721 parties)

Ambassadeurs : Csom, Istvan (7x), Cramling, Pia (6x), Zuluaga Mancilla, Cesar (5x), Erenska-Barlo, Hanna (4x), Bastian, Herbert (4x), Cordova, Emilio (4x), Nandhidhaa, P V (4x), Cruz, Arquias Sofocles Guimaraes (3x)

4.Be2 — 1.8% (55 parties)

Ambassadeurs : Komliakov, Viktor (3x), Kovacevic, Slobodan (2x), Prins, Lodewijk (1x), Day, Lawrence A. (1x), Volke, Karsten (1x), Evers, Udo (1x), Lobigas, Julian (1x), Minaya, Juan (1x)

4.b3 — 0.5% (15 parties)

Ambassadeurs : Donovan, Nigel P (2x), Webster, Andrew A (1x), Heidenfeld, Mark (1x), Bunk, Karsten (1x), Eifler, Tim (1x), Biebinger, Holger (1x), Bujak Izabela (1x), Mikulewicz, Joanna (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	4.Nc3	4.d4	4.Be2	4.b3
<1800	161	66%	30%	2%	1%
1800-2200	1381	72%	25%	2%	0%
2200-2600	1242	76%	22%	2%	0%
2600+	10	80%	20%	—	—

Évolution par décennie (% des parties)

Décennie	N parties	4.Nc3	4.d4	4.Be2	4.b3
1950s	10	70%	20%	—	—
1960s	32	72%	22%	3%	—
1970s	40	65%	30%	2%	—
1980s	82	68%	29%	2%	—
1990s	391	75%	22%	2%	1%
2000s	881	77%	20%	2%	0%
2010s	1195	72%	25%	2%	1%
2020s	399	69%	30%	0%	0%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
4.Nc3	72%	69%	▼ -3.0%
4.d4	25%	30%	▲ +5.2%
4.Be2	2%	0%	▼ -1.9%
4.b3	1%	0%	-0.3%

Joueurs célèbres

Champions du monde dans cette position

Hou, Yifan — 7 parties
Carlsen, Magnus — 1 partie

Parties historiques

4.Nc3 — 73.2% (2217 parties)

1951 — Levin, Eugene vs Prins, Lodewijk — 1-0 — Hollywood, CA
1952 — Leiva, JC. vs Garibaldi, Oscar — 1/2-1/2 — Buenos Aires ARG
1955 — Foldi, Jozsef vs Portisch, Lajos — 1/2-1/2 — Budapest HUN
1956 — Zurakhov, Vladlen Y vs Kotkov, Yuri M — 1/2-1/2 — Tbilisi GEO
1957 — Stoliar, Efim Samoilovich vs Taimanov, Mark — 1/2-1/2 — Moscow RUS

4.d4 — 23.8% (721 parties)

1959 — Anderson, Frank Ross vs Vranesic, Zvonko — 0-1 — Toronto CAN
1959 — Gromek, Jozef vs Witkowski, Stefan — 0-1 — ch POL plof
1963 — Manasterski, Lutoslaw vs Fabian, Henryk — 1/2-1/2 — Glucholazy
1964 — Leigh, BT. vs Collins, Richard — 1/2-1/2 — Southampton ENG
1965 — Tiemann, Christoph vs Neu, Alexandre — 0-1 — cr.

4.Be2 — 1.8% (55 parties)

1968 — Prins, Lodewijk vs Day, Lawrence A. — 0-1 — Lugano Ol
1972 — Lobigas, Julian vs Minaya, Juan — 1-0 — Skopje ol (Men) fin-B
1980 — Volke, Karsten vs Evers, Udo — 1-0 — Rostock GER
1984 — Palma Almendra, Jose Amado vs Lobron, Eric — 0-1 — Thessaloniki olm
1992 — Komliakov, Viktor vs Cvitan, Ognjen — 0-1 — Manila olm

4.b3 — 0.5% (15 parties)

1994 — Donovan, Nigel P vs Webster, Andrew A — 1/2-1/2 — Londen open
1994 — Heidenfeld, Mark vs Bunk, Karsten — 1-0 — Schwabisch
1995 — Eifler, Tim vs Biebinger, Holger — 1-0 — SJRP-ch U17 Sargenroth
1998 — Bujak Izabela vs Mikulewicz, Joanna — 1/2-1/2 — ?
2000 — Ho Vo Toan, Anh vs Dang Giang Nam — 0-1 — Dong Thap