Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● b2→c3, d2→c3, g2→h3	● a6→b5, d6→e5, c7→d6, g7→h6
Passés	—	—
Majorité	—	—

Cases

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

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bb3	● Bb3 Actif (mob. 6)
Be7		● Be7 Mauvais (mob. 0)
Bc8		● Bc8 Non développé (mob. 6)
Paire de fous	● Oui	● Oui
Clouages	—	● pawn f7
Non développées	3 (● b1, ● c1, ● a1)	2 (● c8, ● a8)

Sécurité du roi

	♔ Blancs	♚ Noirs
Statut	● Roqué	● Roqué
Droits de roque	—	—

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	fermé
Ruptures	● c3-c4, ● d2-d4	● …d6-d5

C93a — Spanish: Closed, Smyslov Defence

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d6 9.h3 h6 * ○ Trait aux Blancs

Ouverture — Centre fermé

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plans. d4 (Occuper le centre — 97 % des parties) ; d3 (Solidifier le centre — 2 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plans. ...Re8 (95 % des parties) ; ...Bb7 (Développer c8 — 2 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Partie
1954 URS Ch sf Gorky – Round 3 – Yudovich, Mikhail M – 1-0 – Zagorovsky, Vladimir – G3 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 h6 10. a4 Bb7
1962 Asztalos Memorial 5th – Round 1 – Szily, Jozsef – 1/2-1/2 – Kholmov, Ratmir D – G8 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 h6 10. a4 Bd7
1968 Palma de Mallorca – Round 17 – Westerinen, Heikki M.J. – 0-1 – Spassky, Boris V. – G153 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 h6 10. a4 Bd7

C93a — Closed, Smyslov Defence (1954)

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d6 9.h3 h6

Les coups candidats

10.d4 — 96.1% (3118 parties) →

Ambassadeurs : Flecher, Joseph (90x), Geller, Efim P. (46x), Gligorić, Svetozar (40x), Matanovic, Aleksandar (34x), De Coverly, Roger D (28x), Parma, Bruno (22x), ? (22x), Tal, Mikhail (20x)

10.d3 — 2.9% (93 parties) →

Ambassadeurs : Schneider, Hans-Juergen Prof Dr (10x), Westerinen, Heikki M.J. (2x), Nezhmetdinov, Rashid (2x), Pino Munoz, Francisca (2x), Johansson, Mattias 1973 (2x), Cappello, Guido (1x), Littleton, Michael F (1x), Mestrovic, Zvonimir (1x)

10.a4 — 0.8% (25 parties)

Ambassadeurs : Westerinen, Heikki M.J. (1x), Spassky, Boris V. (1x), Vilerte, Benita (1x), Rosenzweig, Peter (1x), Szily, Jozsef (1x), Kholmov, Ratmir D (1x), Yudovich, Mikhail M (1x), Zagorovsky, Vladimir (1x)

10.Bc2 — 0.2% (6 parties)

Ambassadeurs : ? (2x), Arregui, Alejandro (1x), Summers, Margo (1x), Burlak, Ilya (1x), Nguyen T Diem, Huong (1x), Tako, Annamaria (1x), Vida, Jeno (1x), Malek, Milan (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	10.d4	10.d3	10.a4	10.Bc2
<1800	173	92%	7%	1%	1%
1800-2200	894	94%	5%	1%	0%
2200-2600	1024	98%	2%	1%	—
2600+	36	97%	3%	—	—

Évolution par décennie (% des parties)

Décennie	N parties	10.d4	10.d3	10.a4	10.Bc2
1950s	3	67%	—	33%	—
1960s	487	97%	3%	1%	—
1970s	437	99%	1%	0%	—
1980s	223	96%	2%	1%	0%
1990s	506	98%	1%	0%	0%
2000s	616	95%	4%	1%	0%
2010s	781	94%	5%	1%	0%
2020s	191	98%	2%	—	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
10.d4	94%	98%	▲ +4.7%
10.d3	5%	2%	▼ -3.4%
10.a4	1%	0%	▼ -0.9%
10.Bc2	0%	0%	-0.3%

Joueurs célèbres

Champions du monde dans cette position

Tal, Mikhail — 10 parties
Karpov, Anatoly — 6 parties
Smyslov, Vladimir — 2 parties
Kasparov, Garry — 2 parties
Anand, Viswanathan — 1 partie

Parties historiques

10.d4 — 96.1% (3118 parties)

1954 — Suetin, Alexey S vs Averbakh, Yuri L — 1-0 — Riga LAT
1958 — Bhend, Edwin vs Weltjens, Leon — 1-0 — Munich GER
1960 — Prahov, Valentin vs Kolarov, Atanas S. — 1/2-1/2 — ?
1961 — Geller, Efim P. vs Tal, Mikhail — 1/2-1/2 — Moscow USSR Team ch
1961 — Soderborg, Berndt vs Bendjema, H — 1/2-1/2 — ?

10.d3 — 2.9% (93 parties)

1961 — Nezhmetdinov, Rashid vs Krogius, Nikolai V — 1-0 — Sochi RUS
1962 — Parma, Bruno vs Toran Albero, Roman — 1/2-1/2 — Torremolinos zt
1962 — Evans, Larry vs Lombardy, William J — 1-0 — New York, NY USA
1964 — Nezhmetdinov, Rashid vs Yudovich, Mikhail M — 1/2-1/2 — Baku Baku AZE
1964 — Cuijpers, Frans Andre vs Porath, Yosef — 1-0 — Tel Aviv ISR

10.a4 — 0.8% (25 parties)

1954 — Yudovich, Mikhail M vs Zagorovsky, Vladimir — 1-0 — URS-ch sf Gorky
1962 — Szily, Jozsef vs Kholmov, Ratmir D — 1/2-1/2 — Kecskemet HUN
1966 — Vilerte, Benita vs Rosenzweig, Peter — 1/2-1/2 — ?
1968 — Westerinen, Heikki M.J. vs Spassky, Boris V. — 0-1 — Palma de Majorca ESP
1970 — Garcia, Horacio Pedro vs Panno, Oscar — 1/2-1/2 — Buenos Aires ARG

10.Bc2 — 0.2% (6 parties)

1980 — Arregui, Alejandro vs ? — 1-0 — CADAP III zt fn '77 APA.XI/15
1996 — Summers, Margo vs Burlak, Ilya — 1-0 — corr IECC Swiss
2001 — Nguyen T Diem, Huong vs ? — 0-1 — Ho Chi Minh City VIE
2004 — Tako, Annamaria vs Vida, Jeno — 1/2-1/2 — HUN
2010 — Malek, Milan vs Flecher, Joseph — 1-0 — ?

1954 URS Ch sf Gorky – Round 3 – Yudovich, Mikhail M – 1-0 – Zagorovsky, Vladimir – G3

1962 Asztalos Memorial 5th – Round 1 – Szily, Jozsef – 1/2-1/2 – Kholmov, Ratmir D – G8

1968 Palma de Mallorca – Round 17 – Westerinen, Heikki M.J. – 0-1 – Spassky, Boris V. – G153