Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→g3, h2→g3	● b7→a6, f7→g6, h7→g6
Passés	—	—
Majorité	● aile dame 3v2	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● e4 (2v1), ● f4 (2v0), ● d5 (3v1)	—
Cases faibles	—	—
Centre	● d5 (3v1), ● e4 (2v1)	● e5 (1v0)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● d	● c

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bg2	● Bg2 Actif (mob. 6)
Bg7		● Bg7 Ok (mob. 2)
Bc8		● Bc8 Non développé (mob. 0)
Paire de fous	● Oui	● Oui
Non développées	2 (● c1, ● a1)	2 (● c8, ● a8)

Sécurité du roi

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

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	mobile
Ruptures	—	● …d7-d5

A39f — English: Symmetrical, Main Line 7.d4, 8…a6

1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.d4 cxd4 8.Nxd4 a6 * ○ Trait aux Blancs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plan principal. Jeu au centre.

Atouts. Les Blancs s'appuient sur une majorité de pions à l'aile dame (3 contre 2), un contrôle dominant de e4, f4 et d5, un fou actif en g2 et la colonne semi-ouverte d.

Côté adverse. Un mauvais fou en c8.

En contrepartie. Plusieurs pièces dorment encore (le fou c1 et la tour a1).

Plans. Nc2 (30 % des parties) ; Nxc6 (Menace d8 — 14 % des parties) ; h3 (Empêcher ...Bg4 — 12 % des parties) ; c5 (Frapper le centre adverse — 11 % des parties) ; e3 (Solidifier le centre — 9 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plan principal. Jeu au centre (rupture d7-d5).

Atouts. Les Noirs s'appuient sur la colonne semi-ouverte c.

En contrepartie. Plusieurs pièces dorment encore (le fou c8 et la tour a8).

Plans. ...d6 (Libérer Bc8 — 32 % des parties) ; ...Qc7 (19 % des parties) ; ...Nxd4 (Cavalier centralisé en d4 — 14 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Partie
1928 World Championship Amateur – Round 2 – Carls, Carl – 1/2-1/2 – Tschepurnoff, Anatol Aleksievitis – G5 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6 6. d4 cxd4 7. Nxd4 O-O 8. O-O a6 9. b3 Qa5 10. Bb2 Nxd4
1932 Leningrad – Round 1 – Lisitsin, Georgy – 1/2-1/2 – Miasoedov, Ivan D – G1 1. c4 c5 2. Nf3 Nf6 3. g3 g6 4. Bg2 Bg7 5. O-O Nc6 6. d4 cxd4 7. Nxd4 O-O 8. Nc3 a6 9. h3 Nxd4 10. Qxd4 d6
1935 Vienna – Round 4 – Gereben, Erno – 1-0 – Kolnhofer, Josef – G26 1. c4 Nf6 2. Nc3 c5 3. Nf3 Nc6 4. d4 cxd4 5. Nxd4 g6 6. g3 Bg7 7. Bg2 O-O 8. O-O a6 9. h3 Qc7 10. Be3 d6
1936 Podebrady – Round ? – Frydman, Paulino – 1-0 – Pelikan, Jorge – G98 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. g3 O-O 5. Bg2 c5 6. Nf3 cxd4 7. Nxd4 Nc6 8. O-O a6 9. Nc2 Rb8 10. Bf4 d6
1938 Hastings3839 – Round 5 – Pirc, Vasja – 1-0 – Golombek, Harry – G23 1. Nf3 Nf6 2. g3 g6 3. c4 c5 4. Bg2 Bg7 5. O-O O-O 6. d4 cxd4 7. Nxd4 Nc6 8. Nc3 a6 9. Nc2 d6 10. b3 Ne4
1956 Copenhagen – Round 1 – Kolvig, Bent – 1-0 – Nilsson Mogens – G16 1. Nf3 Nf6 2. g3 g6 3. Bg2 c5 4. O-O Bg7 5. c4 O-O 6. d4 cxd4 7. Nxd4 Nc6 8. Nc3 a6 9. b3 Ne4 10. Bxe4 Bxd4
1957 Reykjavik – Round 2.1 – Larsen, Benjamin Holsko – 0-1 – Abad Munoz, Alba – G24 1. Nf3 Nf6 2. c4 c5 3. g3 g6 4. Bg2 Nc6 5. O-O Bg7 6. d4 cxd4 7. Nxd4 O-O 8. Nc3 a6 9. h3 d6 10. Be3 Bd7
1957 WchT U26 04th – Round 13.4 – Haag, Ervin – 1-0 – Yepez, Osvaldo – G172 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. c4 c5 6. d4 cxd4 7. Nxd4 Nc6 8. Nc3 a6 9. Nxc6 dxc6 10. Bd2 Be6
1958 Jonkoping – Round 2 – Barda, Olaf – 1-0 – Lilliestrom, Malte – G3 1. c4 Nf6 2. Nc3 c5 3. Nf3 g6 4. g3 Bg7 5. Bg2 Nc6 6. O-O O-O 7. d4 cxd4 8. Nxd4 a6 9. h3 h6 10. Be3 Nxd4
1958 WchT U26 fin-A 05th – Round 6 – Molnar, Istvan – 1-0 – Muehlberg, Siegfried – G68 1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O c5 6. d4 cxd4 7. Nxd4 Nc6 8. Nc3 a6 9. b3 Nxd4 10. Qxd4 Ne4
1959 Reggio Emilia ITA – Round 8 – Seitz, Jakob Adolf – 0-1 – Piccinini, Giorgio – G11 1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 c5 5. Nf3 Nc6 6. d4 cxd4 7. Nxd4 O-O 8. O-O a6 9. h3 Nxd4 10. Qxd4 d6
1960 Nimzowitsch Memorial – Round 1 – Stahlberg, Gideon – 1-0 – Enevoldsen, Jens – G17 1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 c5 5. d4 cxd4 6. Nxd4 O-O 7. Nc3 Nc6 8. O-O a6 9. Nc2 d6 10. b3 Bd7
1960 Nimzowitsch Memorial – Round 1 – Stahlberg, Gideon – 1-0 – Pietzsch, Wolfgang – G3 1. c4 Nf6 2. Nc3 c5 3. Nf3 g6 4. d4 cxd4 5. Nxd4 Bg7 6. g3 O-O 7. Bg2 a6 8. O-O Nc6 9. Nc2 d6 10. b3 Bd7
1963 Polanica Zdroj – Round 1 – Doda, Zbigniew – 1/2-1/2 – Balcerowski, Witold – G13 1. Nf3 Nf6 2. c4 c5 3. g3 Nc6 4. Bg2 g6 5. Nc3 Bg7 6. d4 cxd4 7. Nxd4 O-O 8. O-O a6 9. Nc2 d6 10. b3 Bd7
1965 Buenos Aires ch-ARG – Round 1 – Behrensen, Jorge – 1/2-1/2 – Calneggia , Aldo – G18 1. d4 Nf6 2. Nf3 c5 3. g3 cxd4 4. Nxd4 g6 5. Bg2 Bg7 6. O-O O-O 7. c4 Nc6 8. Nc3 a6 9. h3 h6 10. Be3 Qc7
1966 Tel-Aviv it – Round 4 – Golombek, Harry – 0-1 – Kraidman, Yair – G8 1. c4 Nf6 2. Nc3 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 c5 6. O-O Nc6 7. d4 cxd4 8. Nxd4 a6 9. h3 Nxd4 10. Qxd4 d6
1967 POL Ch 24th – Round 4 – Adamski, Jan – 1/2-1/2 – Balcerowski, Witold – G6 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 c5 5. Nf3 O-O 6. Nc3 Nc6 7. O-O cxd4 8. Nxd4 a6 9. Nc2 d6 10. b3 Bd7

A39f — Symmetrical, Main Line 7.d4 (1928)

1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.d4 cxd4 8.Nxd4 a6

Les coups candidats

9.c5 — 21.4% (429 parties)

Ambassadeurs : Adamski, Jan (4x), Velasquez, Manuel A (3x), Kertesz, Alfred (2x), Holloway, Nigel J (2x), Khadempour, Farhad (2x), Szekely, Panna Szandra (2x), Frois, Antonio (2x), Conceicao, Paulo (2x)

9.Nc2 — 18.0% (361 parties)

Ambassadeurs : Balcerowski, Witold (3x), Loginov, Valery A (3x), Adamski, Jan (2x), Stahlberg, Gideon (2x), Perez Nivar, Marco Tulio (2x), Konopleva, Natalia (2x), Vasiljev, Jurij (2x), Gromek, Jozef (1x)

9.h3 — 12.0% (240 parties)

Ambassadeurs : Christiansen, Johan-Sebastian (2x), Seitz, Jakob Adolf (1x), Piccinini, Giorgio (1x), Barda, Olaf (1x), Lilliestrom, Malte (1x), Sigurjonsson, Johann O (1x), Angantysson, Haukur (1x), Larsen, Bent Ravn (1x)

9.e3 — 10.1% (203 parties)

Ambassadeurs : Richter, Samuel Dion (2x), Boey, Josef (1x), Decleir, Walter (1x), Aditya Balu Jadhav (1x), Golombek, Harry (1x), Sakharov, Yuri N (1x), Popov, Luben (1x), Naranja, Renato (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	9.c5	9.Nc2	9.h3	9.e3
<1800	145	8%	13%	12%	12%
1800-2200	1198	21%	18%	13%	10%
2200-2600	373	37%	17%	10%	9%
2600+	1	—	—	100%	—

Évolution par décennie (% des parties)

Décennie	N parties	9.c5	9.Nc2	9.h3	9.e3
1950s	14	7%	—	36%	14%
1960s	22	—	45%	14%	9%
1970s	46	20%	41%	13%	7%
1980s	84	10%	25%	8%	8%
1990s	330	19%	22%	12%	12%
2000s	536	19%	16%	13%	10%
2010s	776	23%	15%	12%	10%
2020s	193	34%	18%	7%	8%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
9.c5	23%	34%	▲ +10.9%
9.Nc2	15%	18%	▲ +2.9%
9.h3	12%	7%	▼ -5.2%
9.e3	10%	8%	▼ -2.0%

Parties historiques

9.c5 — 21.4% (429 parties)

1958 — Shaposhnikov, Yury vs G.k.p., Rubel — 1-0 — Tashkent UZB
1971 — Holloway, Nigel J vs Cooper, Andrew C — 1-0 — Trinity-Trinity Hall
1972 — Flatow, Alfred vs Al Jassani Abdulrazaq — 1-0 — Skopje MKD
1972 — Holloway, Nigel J vs Patterson, MG. — 1-0 — Barnstaple
1974 — Sharipov, Munir vs Harestad, Thor Geir — 1/2-1/2 — Teesside ENG

9.Nc2 — 18.0% (361 parties)

1960 — Stahlberg, Gideon vs Enevoldsen, Jens — 1-0 — Copenhagen DEN
1960 — Stahlberg, Gideon vs Pietzsch, Wolfgang — 1-0 — Copenhagen DEN
1962 — Gromek, Jozef vs Gabrys, Zygmunt — 1-0 — Poznan POL
1963 — Doda, Zbigniew vs Balcerowski, Witold — 1/2-1/2 — Polanica Zdroj POL
1965 — Kestler, Hans Guenter vs Degenhardt, Norbert — 1/2-1/2 — Bad Aibling GER

9.h3 — 12.0% (240 parties)

1955 — Feuerstein, Arthur vs Rodriguez Garcia, Benedicto — 1-0 — New York, NY USA
1957 — Larsen, Bent Ravn vs Munoz Tamayo, Cesar Froilan — 0-1 — Reykjavik ISL
1957 — Schmid, Lothar vs Castaldi, Vincenzo — 1-0 — Bern Bern SUI
1958 — Barda, Olaf vs Lilliestrom, Malte — 1-0 — Jonkoping
1959 — Seitz, Jakob Adolf vs Piccinini, Giorgio — 0-1 — Reggio Emilia ITA

9.e3 — 10.1% (203 parties)

1955 — Aditya Balu Jadhav vs Golombek, Harry — 1-0 — Mont Pelerin sur Vevey
1957 — Boey, Josef vs Decleir, Walter — 1-0 — Antwerp BEL
1964 — Sakharov, Yuri N vs Popov, Luben — 1/2-1/2 — Kiev UKR
1967 — Naranja, Renato vs Bandal, Rosendo Jr — 1-0 — Manila PHI
1971 — Quinteros, Miguel A. vs Juarez, Carlos Eleodoro — 1/2-1/2 — Mar del Plata ARG

Fin du contenu

Aucune page supplémentaire à charger

Articles plus anciens →