B21z — Sicilian: Smith-Morra, 5.Nf3 d6 6.Bc4 e6 7.O-O Nf6 8.Qe2 Be7

1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 d6 6.Bc4 e6 7.O-O Nf6 8.Qe2 Be7 * ○ Trait aux Blancs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Avantages : case forte e4, case forte b5, case forte g5, Bc4 actif, paire de fous, colonne d.
Faiblesses adverses : Be7 enfermé, Bc8 enfermé, roi noir au centre.
Problèmes : Bc1 enfermé.
Plans :
● Bg5 — Clouer Nf6
● h3 — Empêcher ...Bg4
● Rc — Tour sur colonne c
● Rd — Tour sur colonne d

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Avantages : majorité centre (2v1), case forte e5, avant-poste e5(C), paire de fous.
Faiblesses adverses : Bc1 enfermé.
Problèmes : roi au centre, Be7 enfermé, Bc8 enfermé, 3 pièces non développées (C8, A8, H8).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● ...Bd7 — PRIORITÉ: libérer le Bc8 (...Bd7, b6+Bb7, ...Bg4, ...Bf5)
● ...Na5 — Attaquer Bc4
● ...Bg4 — Clouer Nf3
● ...d5 — Rupture

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

B21z — Smith-Morra

1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 d6 6.Bc4 e6 7.O-O Nf6 8.Qe2 Be7

Eval: [+0.03]

Les coups candidats

9.Rd1 — 97.5% (2893 parties)

Ambassadeurs : Acuna Moore, Kevin Stiven (19x), ? (18x), Vasquez Anabalon, Fernando (18x), Morin, Louis (18x), Boll, Peter (12x), Jaumandreu Llopis, Antonio (12x), Timar, Zsolt (11x), Zelic, Mladen (10x)

9.Bf4 — 0.9% (27 parties)

Ambassadeurs : Bullock, Alfred (1x), Frederick Harmon (1x), De Smet, Karl (1x), Gatto, Claudio (1x), Kichinski, Robert (1x), Kristinn Lee, Gudmundur (1x), Baldursson, Reynir (1x), Sveinsson, Jon Arni (1x)

9.e5 — 0.4% (12 parties)

Ambassadeurs : Edel Alfred (1x), Boyd, Stephen (1x), Burgess, Doug (1x), Cohen, David (1x), Walker Arvola, Leo (1x), Triplett, Thomas (1x), Achenbach, Manfred (1x), Klein, Manfred (1x)

9.Re1 — 0.4% (11 parties)

Ambassadeurs : Lovie, Thomas G (1x), Steeves, Robin R (1x), Hjortstam, Kurt (1x), Shakhov, Igor Anatolievich (1x), Claus, Joachim (1x), Fabian, Helmut (1x), Behle, Karl-Willi (1x), Neese, Hans-Joachim (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	9.Rd1	9.Bf4	9.e5	9.Re1
<1800	149	97%	—	1%	1%
1800-2200	1235	98%	0%	1%	0%
2200-2600	406	99%	1%	0%	0%
2600+	1	100%	—	—	—

Évolution par décennie (% des parties)

Décennie	N parties	9.Rd1	9.Bf4	9.e5	9.Re1
1940s	5	100%	—	—	—
1950s	15	100%	—	—	—
1960s	39	97%	—	—	—
1970s	156	99%	1%	1%	—
1980s	300	98%	1%	0%	—
1990s	743	97%	1%	0%	1%
2000s	861	98%	1%	0%	0%
2010s	758	97%	1%	0%	0%
2020s	90	96%	2%	2%	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
9.Rd1	97%	96%	▼ -1.4%
9.Bf4	1%	2%	▲ +1.2%
9.e5	0%	2%	▲ +1.8%
9.Re1	0%	0%	-0.4%

Parties historiques

9.Rd1 — 97.5% (2893 parties)

1948 — Rhoden, F. vs Barlow, Aaron — 1-0 — Hastings ENG
1949 — Galia Karl vs Foltys, Jan — 0-1 — ?
1949 — Galia, K. vs Foltys — 0-1 — Vienna AUT
1949 — Gilia vs Foltys — 0-1 — Vienna AUT
1949 — Galia, Karl vs Platt, Itzchak — 0-1 — Vienna AUT

9.Bf4 — 0.9% (27 parties)

1978 — Baldursson, Reynir vs Sveinsson, Jon Arni — 0-1 — Reykjavik ISL
1980 — Bullock, Alfred vs Frederick Harmon — 1-0 — Dayton, OH USA
1987 — De Smet, Karl vs Gatto, Claudio — 0-1 — ?
1989 — Kichinski, Robert vs Kristinn Lee, Gudmundur — 0-1 — Berkeley
1992 — Alcobas Cervantes, Miguel Angel vs Alfonso Cardenas, Alvaro Antonio — 1-0 — Mesa

9.e5 — 0.4% (12 parties)

1973 — Edel Alfred vs Boyd, Stephen — 0-1 — ?
1987 — Burgess, Doug vs Cohen, David — 1-0 — Ottawa CAN
1991 — Walker Arvola, Leo vs Triplett, Thomas — 0-1 — Detroit Hart Plaza op
2001 — Barry Bertomeu, Enrique vs Amura, Claudia — 0-1 — Villa de Mislata X Open
2002 — Jacob, Konrad vs Krieger, Hermann — 0-1 — Meran ITA

9.Re1 — 0.4% (11 parties)

1990 — Hjortstam, Kurt vs Shakhov, Igor Anatolievich — 1-0 — ?
1992 — Aguilar Sancho, Maria vs Acevedo Rodriguez, Maria Nella — 0-1 — ?
1993 — Claus, Joachim vs Fabian, Helmut — 0-1 — Ellwangen
1995 — Lovie, Thomas G vs Steeves, Robin R — 0-1 — IECG email
1998 — Behle, Karl-Willi vs Neese, Hans-Joachim — 1/2-1/2 — Bad Wildbad GER

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	—	● f7→e6
Passés	—	—
Majorité	—	● centre 2v1

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● e4 (2v1), ● b5 (2v0), ● g5 (2v0)	● e5 (2v1)
Cases faibles	—	—
Centre	● d5 (3v2), ● e4 (2v1)	● e5 (2v1)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Ouvertes	● c	● c
Semi-ouvertes	● d	—

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bc4	● Bc4 Actif (mob. 6)
Be7		● Be7 Enfermé (mob. 1)
Bc8		● Bc8 Non développé (mob. 1)
Paire de fous	● Oui	● Oui
Non développées	2 (c1, a1)	3 (c8, a8, h8)

Sécurité du roi

	♔ Blancs	♚ Noirs
Statut	● Roqué	● Au centre !
Droits de roque	—	O-O / O-O-O

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	semi-ouvert
Ruptures	● e4-e5	● …d6-d5, ● …e6-e5

Partie
1956 Yugoslavia – Round 10 – Maric Vild, Fabijan – 1/2-1/2 – Karaklajic, Nikola – G11 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 d6 6. Bc4 e6 7. O-O Nf6 8. Qe2 Be7 9. Rd1 e5 10. h3 O-O
1957 WchT U26 04th – Round 11.3 – Kajaste, Pentti – 1-0 – Liebert, Heinz – G144 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 d6 6. Bc4 e6 7. O-O Be7 8. Qe2 Nf6 9. Rd1 e5 10. Bg5 O-O
1958 GBR Ch 45th – Round 4.6 – Mardle, Denis – 1/2-1/2 – Ellison, D George – G26 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. c3 dxc3 5. Nxc3 e6 6. Bc4 d6 7. O-O Be7 8. Qe2 Nf6 9. Rd1 e5 10. Be3 O-O
1958 HUN Ch 13th – Round 12 – Ozsvath, Andras – 1-0 – Gasztonyi, Endre – G104 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. c3 dxc3 5. Nxc3 d6 6. Bc4 e6 7. O-O Be7 8. Qe2 Nf6 9. Rd1 O-O 10. Bf4 a6
1958 Sarajevo Sarajevo BIH – Round 1 – Marić, Rudolf – 1/2-1/2 – Trifunovic, Petar – G24 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 d6 6. Bc4 e6 7. O-O Nf6 8. Qe2 Be7 9. Rd1 e5 10. h3 O-O
1960 Aalborg – Round 1 – From, Sigfred – 1-0 – Pedersen, Eigil – G19 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. c3 dxc3 5. Nxc3 d6 6. Bc4 e6 7. O-O Nf6 8. Qe2 Be7 9. Rd1 Qc7 10. Bf4 Ne5
1960 Buenos Aires ch-ARG – Round 1 – Emma, Jaime – 1-0 – Goldenberg, Edgardo – G8 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 d6 5. Bc4 e6 6. Nf3 Nc6 7. O-O Be7 8. Qe2 Nf6 9. Rd1 e5 10. h3 O-O
1960 Leipzig olm – Round 1 – Seth BC – 1/2-1/2 – Filipowicz, Andrzej – G9 1. e4 c5 2. d4 cxd4 3. Nf3 d6 4. Bc4 e6 5. c3 dxc3 6. Nxc3 Nc6 7. O-O Nf6 8. Qe2 Be7 9. Rd1 e5 10. h3 O-O
1961 London Boys U18 Ch – Round 2 – Collins, Richard Arnold – 0-1 – Johnson, A E. – G2 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. c3 dxc3 5. Nxc3 Nc6 6. Bc4 e6 7. O-O Nf6 8. Qe2 Be7 9. Rd1 Bd7 10. Nb5 O-O
1962 CSR Ch sf – Round 11 – Ratolistka, Josef – 0-1 – Tesar, Karol – G38 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 d6 5. Bc4 e6 6. Nf3 Nc6 7. O-O Nf6 8. Qe2 Be7 9. Rd1 Bd7 10. h3 a6
1964 Open - CFNC Experts – Round ? – Thornally, Frank D – 1-0 – Sloan, Sam – G11 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. c3 dxc3 5. Nxc3 d6 6. Bc4 e6 7. O-O Be7 8. Qe2 Nf6 9. Rd1 O-O 10. e5 Ne8
1965 ARG Ch – Round 13 – Luna, Julio – 0-1 – Emma, Jaime – G8 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. c3 dxc3 5. Nxc3 Nc6 6. Bc4 d6 7. O-O Be7 8. Qe2 Nf6 9. Rd1 e5 10. Bg5 Bg4
1966 Parcetic Memorial 2nd – Round 2 – Maric, Rudolf – 1/2-1/2 – Barczay, Laszlo – G7 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 d6 6. Bc4 e6 7. O-O Be7 8. Qe2 Nf6 9. Rd1 e5 10. h3 Be6
1969 Moskou ch-URS – Round 1 – Zaitsev, Igor A – 1/2-1/2 – Taimanov, Mark E – G107 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. c3 dxc3 5. Nxc3 Nc6 6. Bc4 d6 7. O-O Nf6 8. Qe2 Be7 9. Rd1 e5 10. h3 O-O
1969 Stary Smokovec – Round 11.3 – Cibulka, Vladimir – 1/2-1/2 – Jansa, Vlastimil – G46 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 d6 6. Bc4 e6 7. O-O Nf6 8. Qe2 Be7 9. Rd1 e5 10. h3 O-O

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