B28i — Sicilian: O’Kelly, 3.c3 e6

1.e4 c5 2.Nf3 a6 3.c3 e6 * ○ Trait aux Blancs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

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Plans. d4 (Occuper le centre — 96 % des parties) ; Be2 (Fou actif (mobilité 5), Développer f1 — 1 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

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Plans. ...d5 (Occuper le centre — 74 % des parties) ; ...b5 (Expansion aile dame — 3 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● b2→c3, d2→c3	● b7→a6, d7→e6, f7→e6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	—	—
Cases faibles	—	—
Centre	● d4 (2v1), ● e5 (1v0)	—

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bf1	● Bf1 Non développé (mob. 5)
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
1955 HUN Ch 11th – Round ? – Honfi, Karoly – 0-1 – Portisch, Lajos – G9 1. e4 c5 2. Nf3 a6 3. c3 e6 4. d4 d5 5. e5 Bd7 6. Bd3 Bb5 7. O-O Bxd3 8. Qxd3 c4 9. Qe2 Ne7 10. b3 b5
1958 Munich olm fin-B – Round 10 – Enevoldsen, Jens – 1/2-1/2 – De Greif, Boris – G100 1. e4 c5 2. Nf3 a6 3. c3 e6 4. d4 d5 5. e5 Nd7 6. Bd3 Ne7 7. Na3 Nc6 8. Nc2 Be7 9. O-O O-O 10. Re1 c4
1959 Alekhine Memorial – Round 9 – Lutikov, Anatoly S – 0-1 – Spassky, Boris V. – G48 1. e4 c5 2. Nf3 a6 3. c3 e6 4. d4 cxd4 5. cxd4 d5 6. e5 Nc6 7. Nc3 Be7 8. Bd3 h5 9. O-O Bd7 10. a3 Nh6
1964 Rubinstein Memorial – Round 13 – Pietrusiak, Bogdan – 0-1 – Velimirovic, Dragoljub – G41 1. e4 c5 2. Nf3 a6 3. c3 e6 4. d4 d5 5. e5 f5 6. exf6 Nxf6 7. Bd3 Nc6 8. O-O cxd4 9. cxd4 Bd6 10. Nc3 O-O
1964 Rubinstein Memorial – Round 15 – Kostro, Jerzy – 0-1 – Velimirovic, Dragoljub – G46 1. e4 c5 2. Nf3 a6 3. c3 e6 4. d4 d5 5. e5 f5 6. Bd3 Nc6 7. O-O Nge7 8. Nbd2 Ng6 9. Re1 Be7 10. dxc5 Bxc5
1965 Corr SSV-75 – Round ? – Bondarevsky, Igor – 1-0 – Keller, Hanno – G7 1. e4 c5 2. Nf3 a6 3. c3 e6 4. d4 d5 5. e5 Bd7 6. Bd3 Bb5 7. O-O Bxd3 8. Qxd3 Nc6 9. Be3 c4 10. Qe2 Nge7
1965 HUN Ch 20th – Round 1 – Szily, Jozsef – 1/2-1/2 – Hajtun, Joseph – G6 1. e4 c5 2. Nf3 a6 3. c3 e6 4. d4 d5 5. exd5 Qxd5 6. Be2 Nf6 7. O-O Nc6 8. Bf4 Be7 9. Ne5 Nxe5 10. Bxe5 O-O
1966 Oberhausen ol women – Round 5 – Gresser, Gisela Kahn – 1-0 – Rinder, Elfriede – G24 1. e4 c5 2. Nf3 a6 3. c3 e6 4. d4 cxd4 5. cxd4 Nf6 6. Nc3 Bb4 7. Bd3 Nc6 8. O-O O-O 9. Bg5 Be7 10. Qe2 d6
Amber Rapidplay 2002 – Round 3 – Leko, Peter – 1/2-1/2 – Morozevich, Alexander – G14 1. e4 c5 2. Nf3 a6 3. c3 e6 4. d4 d5 5. e5 Bd7 6. Be2 Nc6 7. O-O Rc8 8. a3 h6 9. dxc5 Bxc5 10. Nbd2 Qc7
FIDE World Cup 2017 – Round 2.4 – Najer, Evgeniy – 1-0 – Vitiugov, Nikita – G279 1. e4 c5 2. Nf3 a6 3. c3 e6 4. d4 d5 5. exd5 Qxd5 6. Be2 Nf6 7. O-O Be7 8. Be3 cxd4 9. cxd4 Nc6 10. Nc3 Qd6

B28i — O’Kelly (1952)

1.e4 c5 2.Nf3 a6 3.c3 e6

Les coups candidats

4.d4 — 95.5% (2090 parties)

Ambassadeurs : Green, Michael (24x), Nestorovic, Nikola (15x), Joksic, Sinisa (13x), Adams, Mark (9x), Eingorn, Vereslav S (8x), Mamonovas, Viktoras (7x), Vucinic, Gojko (7x), Ackermann, Hans Werner (7x)

4.Be2 — 1.2% (26 parties)

Ambassadeurs : Skidmore, Michael (1x), Turner, Paul (1x), Perestret, J. (1x), Tulacz, Dorota (1x), Laugery, David (1x), Jago, Stephen (1x), Kaps, Darja (1x), Foisor, Cristina-Adela (1x)

4.d3 — 1.1% (25 parties)

Ambassadeurs : Caoili, Arianne (1x), Kovalevskaya, Svetlana (1x), Rodriguez, Santiago (1x), Jenidarchiche, Douglas Rodrigo (1x), Hoose, Hannelore (1x), Orlova, Lubov (1x), Leistner, Peter (1x), Mainka, Walter (1x)

4.g3 — 0.7% (15 parties)

Ambassadeurs : Butschek, Tanja (1x), Winkelmann, Elena (1x), Cherkashenko, Igor (1x), Kornilov, Peter (1x), Percze, Gabor (1x), Bakacs, Ferenc (1x), Medaglia, Enzo (1x), Bertazzoni, Giuseppe (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	4.d4	4.Be2	4.d3	4.g3
<1800	200	92%	2%	4%	—
1800-2200	975	94%	1%	1%	1%
2200-2600	798	99%	0%	0%	0%
2600+	24	100%	—	—	—

Évolution par décennie (% des parties)

Décennie	N parties	4.d4	4.Be2	4.d3	4.g3
1950s	4	100%	—	—	—
1960s	12	100%	—	—	—
1970s	22	100%	—	—	—
1980s	53	100%	—	—	—
1990s	172	95%	1%	1%	—
2000s	587	94%	1%	1%	1%
2010s	981	96%	1%	2%	1%
2020s	357	97%	1%	0%	1%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
4.d4	96%	97%	▲ +1.1%
4.Be2	1%	1%	-0.5%
4.d3	2%	0%	▼ -1.2%
4.g3	1%	1%	+0.4%

Joueurs célèbres

Champions du monde dans cette position

Ju, Wenjun — 2 parties
Hou, Yifan — 2 parties
Carlsen, Magnus — 1 partie

Parties historiques

4.d4 — 95.5% (2090 parties)

1952 — Szily, Jozsef vs Bobotsov, Milko G — 1-0 — Miedzyzdroje
1955 — Honfi, Karoly vs Portisch, Lajos — 0-1 — Budapest HUN
1958 — Enevoldsen, Jens vs De Greif, Boris — 1/2-1/2 — Munich GER
1959 — Lutikov, Anatoly S vs Spassky, Boris V. — 0-1 — Moscow RUS
1962 — Benjko, Irina vs Boneva, L — 1/2-1/2 — ?

4.Be2 — 1.2% (26 parties)

1991 — Skidmore, Michael vs Turner, Paul — 1-0 — Ann Arbor Huron Valley
1996 — Perestret, J. vs Tulacz, Dorota — 1/2-1/2 — Augustow
2000 — Friedel, Joshua vs Delbino, Diego — 1-0 — Pan-AM Sub14M
2001 — Sowa Rudolf vs Frenkel, Guenter — 1/2-1/2 — ?
2002 — Laugery, David vs Jago, Stephen — 1-0 — Melbourne AUS

4.d3 — 1.1% (25 parties)

1997 — Caoili, Arianne vs Kovalevskaya, Svetlana — 1-0 — Bad Wiessee open
1999 — Rodriguez, Santiago vs Jenidarchiche, Douglas Rodrigo — 1-0 — X Festival Pan Sub16 M
2000 — Hoose, Hannelore vs Orlova, Lubov — 0-1 — Rowy POL
2000 — Leistner, Peter vs Mainka, Walter — 0-1 — ?
2004 — Ter Steponiants, Antonina vs Popova, Irina — 1-0 — Dagomys

4.g3 — 0.7% (15 parties)

2004 — Butschek, Tanja vs Winkelmann, Elena — 1-0 — Willingen GER
2007 — Percze, Gabor vs Bakacs, Ferenc — 0-1 — HUN
2008 — Medaglia, Enzo vs Bertazzoni, Giuseppe — 0-1 — Asti ITA
2009 — Cherkashenko, Igor vs Kornilov, Peter — 0-1 — Borisoglebsk
2012 — Muratet Casadevall, Albert vs Drazic, Sinisa — 0-1 — Skopje MKD