Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→g3, h2→g3	● e7→d6, f7→g6, h7→g6
Passés	—	—
Majorité	● aile dame 3v2	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● e4 (2v1), ● f4 (2v0), ● b5 (2v0), ● d5 (4v1)	● g4 (2v0), ● f5 (2v0)
Cases faibles	—	—
Centre	● d4 (1v0), ● d5 (4v1), ● e4 (2v1)	● e5 (1v0)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● d	● c

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bg2	● Bg2 Actif (mob. 7)
Bg7		● Bg7 Ok (mob. 2)
Bc8		● Bc8 Non développé (mob. 5)
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	● c4-c5	● …d6-d5

A39l — English: Symmetrical, Main Line 7.d4, 10.Qd2

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 Nxd4 9.Qxd4 d6 10.Qd2 * ● Trait aux Noirs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plan principal. Jeu sur l'aile dame (b3 dans 70 % des parties).

Atouts. Les Blancs s'appuient sur une majorité de pions à l'aile dame (3 contre 2), un contrôle dominant de e4, f4, b5 et d5, un fou actif en g2 et la colonne semi-ouverte d.

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

Plans. b3 (Préparer le fianchetto — 70 % des parties) ; Bxb7 (Fou actif (mobilité 9) — 19 % des parties) ; Rd1 (Tour sur colonne semi-ouverte d — 7 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plan principal. Jeu au centre (rupture d6-d5).

Atouts. Les Noirs s'appuient sur un contrôle dominant de g4 et f5 et la colonne semi-ouverte c.

Côté adverse. Un mauvais fou en c1.

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

Plans. ...Rb8 (38 % des parties) ; ...Be6 (Fou actif (mobilité 7), Développer c8 — 25 % des parties) ; ...a6 (Préparer expansion aile dame — 16 % des parties) ; ...Qc7 (16 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Partie
1933 Folkestone Olympiad 5th – Round 4.11 – Rejfir, Josef – 1/2-1/2 – Glass, Eduard – G34 1. c4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. g3 Bg7 7. Bg2 O-O 8. O-O Nxd4 9. Qxd4 d6 10. Qd2 Qb6
1939 Bad Elster – Round 3 – Lokvenc, Josef – 1/2-1/2 – Roess, L. – G10 1. Nf3 Nf6 2. c4 c5 3. Nc3 Nc6 4. g3 g6 5. Bg2 Bg7 6. O-O O-O 7. d4 cxd4 8. Nxd4 Nxd4 9. Qxd4 d6 10. Qd2 Rb8
1944 Brno ch CZE – Round 3 – Sajtar, Jaroslav – 1/2-1/2 – Pachman, Ludek – G3 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nf3 c5 6. O-O cxd4 7. Nxd4 Nc6 8. Nc3 Nxd4 9. Qxd4 d6 10. Qd2 Qc7
1952 Helsinki olm – Round 1 – Pithart, Frantisek – 1-0 – Jost, Felix – G290 1. Nf3 Nf6 2. c4 c5 3. g3 Nc6 4. Bg2 g6 5. O-O Bg7 6. d4 cxd4 7. Nxd4 O-O 8. Nc3 Nxd4 9. Qxd4 d6 10. Qd2 Rb8
1953 Venice – Round 6 – Udovcic, Mijo – 1-0 – Szabados, Eugenio – G14 1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 Nc6 5. Nc3 g6 6. g3 Bg7 7. Bg2 O-O 8. O-O Nxd4 9. Qxd4 d6 10. Qd2 Qc7
1956 Marianske Lazne/Praha – Round 7 – Ståhlberg, Gideon – 1-0 – Ujtelky, Maximilian – G49 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 Nxd4 9. Qxd4 d6 10. Qd2 Rb8
1957 New York ch-USA – Round 12 – Lombardy, William J – 0-1 – Seidman, Herbert – G9 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 Nxd4 9. Qxd4 d6 10. Qd2 Qb6
1960 BUL-ch14 Sofia BUL – Round 10 – Bobotsov, Milko G – 1/2-1/2 – Prahov, Valentin – G37 1. c4 Nf6 2. Nc3 c5 3. g3 Nc6 4. Bg2 g6 5. Nf3 Bg7 6. d4 cxd4 7. Nxd4 O-O 8. O-O Nxd4 9. Qxd4 d6 10. Qd2 Rb8
1960 Sarajevo – Round 1 – Matulovic, Milan – 1-0 – Trifunovic, Petar – G1 1. c4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. g3 Bg7 7. Bg2 O-O 8. O-O Nxd4 9. Qxd4 d6 10. Qd2 Rb8
1961 Zevenaar – Round 7 – Langeweg, Kick – 1/2-1/2 – Milic, Bozidar – G51 1. c4 c5 2. Nc3 Nf6 3. Nf3 g6 4. d4 cxd4 5. Nxd4 Bg7 6. g3 Nc6 7. Bg2 Nxd4 8. Qxd4 O-O 9. O-O d6 10. Qd2 Rb8
1962 Asztalos Memorial 5th – Round 1 – Kolarov, Atanas Stefanov – 1/2-1/2 – Pirc, Vasja – G3 1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 Nc6 5. Nc3 g6 6. g3 Bg7 7. Bg2 O-O 8. O-O Nxd4 9. Qxd4 d6 10. Qd2 Be6
1962 Asztalos Memorial 5th – Round 15 – Pirc, Vasja – 1/2-1/2 – Lengyel, Levente – G116 1. Nf3 c5 2. g3 g6 3. Bg2 Bg7 4. O-O Nc6 5. c4 d6 6. Nc3 Nf6 7. d4 cxd4 8. Nxd4 Nxd4 9. Qxd4 O-O 10. Qd2 Be6
1962 Asztalos Memorial 5th – Round 8 – Pirc, Vasja – 1/2-1/2 – Portisch, Lajos – G60 1. Nf3 c5 2. g3 Nc6 3. Bg2 g6 4. O-O Bg7 5. c4 Nf6 6. Nc3 O-O 7. d4 cxd4 8. Nxd4 Nxd4 9. Qxd4 d6 10. Qd2 Be6
1962 It Bamberg GER – Round 7 – Kestler, Hans-Guenther – 1/2-1/2 – Parma, Bruno – G31 1. c4 Nf6 2. Nc3 c5 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nc6 6. O-O O-O 7. d4 cxd4 8. Nxd4 Nxd4 9. Qxd4 d6 10. Qd2 Rb8
1962 Marianske Lazne – Round 6 – Hort, Vlastimil – 1/2-1/2 – Ghitescu, Theodor – G39 1. c4 c5 2. Nc3 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nc6 6. d4 cxd4 7. Nxd4 O-O 8. O-O Nxd4 9. Qxd4 d6 10. Qd2 Rb8
1963 Hoogovens – Round 16 – Stahlberg, Gideon – 1/2-1/2 – Parma, Bruno – G135 1. Nf3 c5 2. c4 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. g3 Nxd4 6. Qxd4 g6 7. Bg2 Bg7 8. O-O O-O 9. Nc3 d6 10. Qd2 Rb8
1963 Leningrad ch-URS – Round ? – Korchnoi, Viktor – 1/2-1/2 – Geller, Efim P – G143 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. g3 g6 5. Bg2 Bg7 6. d4 cxd4 7. Nxd4 O-O 8. O-O Nxd4 9. Qxd4 d6 10. Qd2 Be6
1964 Kecskemet zt – Round 1 – Damjanovic, Marko – 1-0 – Hort, Vlastimil – G16 1. d4 Nf6 2. c4 c5 3. Nf3 g6 4. g3 Bg7 5. Bg2 O-O 6. O-O cxd4 7. Nxd4 Nc6 8. Nc3 Nxd4 9. Qxd4 d6 10. Qd2 a6
1964 POL-ch21 Warsaw POL – Round 5 – Plater Zyberg, Ambre – 0-1 – Balcerowski, Witold – G13 1. g3 g6 2. Bg2 Bg7 3. c4 c5 4. Nc3 Nc6 5. Nf3 Nf6 6. d4 cxd4 7. Nxd4 Nxd4 8. Qxd4 O-O 9. O-O d6 10. Qd2 a6
1964 Zagreb – Round 4 – Bobotsov, Milko G – 1/2-1/2 – Parma, Bruno – G19 1. c4 c5 2. Nc3 Nc6 3. Nf3 Nf6 4. g3 g6 5. Bg2 Bg7 6. O-O O-O 7. d4 cxd4 8. Nxd4 Nxd4 9. Qxd4 d6 10. Qd2 Rb8
1965 Capablanca Memorial – Round 6 – Bilek, Istvan – 1/2-1/2 – Pietzsch, Wolfgang – G64 1. Nf3 Nf6 2. g3 c5 3. Bg2 Nc6 4. c4 g6 5. d4 cxd4 6. Nxd4 Bg7 7. Nc3 O-O 8. O-O Nxd4 9. Qxd4 d6 10. Qd2 a6
1965 FRG CupT – Round 1.1 – Lossa, Guenther – 1/2-1/2 – Kieninger, Georg – G2 1. c4 Nf6 2. Nf3 c5 3. Nc3 Nc6 4. g3 g6 5. Bg2 Bg7 6. O-O O-O 7. d4 cxd4 8. Nxd4 Nxd4 9. Qxd4 d6 10. Qd2 Rb8
1965 Harrachov U26 – Round 1 – Smejkal, Jan – 1-0 – Janata, Michael – G1 1. c4 Nf6 2. Nf3 c5 3. g3 g6 4. Bg2 Bg7 5. O-O Nc6 6. d4 O-O 7. Nc3 cxd4 8. Nxd4 Nxd4 9. Qxd4 d6 10. Qd2 Rb8
1965 Harrachov U26 – Round 9 – Tichy, Vladimir – 1/2-1/2 – Smejkal, Jan – G25 1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nc3 c5 5. Nf3 Nc6 6. d4 cxd4 7. Nxd4 O-O 8. O-O Nxd4 9. Qxd4 d6 10. Qd2 Be6
1965 Kiel Open – Round 10 – Kestler, Hans-Guenther – 1-0 – Lohmann, Heinrich – G46 1. c4 c5 2. Nc3 Nc6 3. Nf3 Nf6 4. g3 g6 5. Bg2 Bg7 6. O-O O-O 7. d4 cxd4 8. Nxd4 Nxd4 9. Qxd4 d6 10. Qd2 Qc7
1965 New York ch-USA – Round 3 – Burger, Kim – 1/2-1/2 – Zuckerman, Bernard – G7 1. Nf3 c5 2. c4 Nc6 3. Nc3 Nf6 4. g3 g6 5. Bg2 Bg7 6. O-O O-O 7. d4 cxd4 8. Nxd4 Nxd4 9. Qxd4 d6 10. Qd2 Be6
1965 POL Ch 22th – Round 4 – Brzozka, Stefan – 1-0 – Marszalek, Rafal – G17 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. g3 g6 5. Bg2 Bg7 6. O-O O-O 7. d4 cxd4 8. Nxd4 Nxd4 9. Qxd4 d6 10. Qd2 Rb8
1965 SWE Ch – Round 13 – Gonzalez Vidal, Yuri – 1/2-1/2 – Fridh, Anton – G40 1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 c5 5. Nf3 Nc6 6. O-O O-O 7. d4 cxd4 8. Nxd4 Nxd4 9. Qxd4 d6 10. Qd2 Rb8
1966 Hoogovens 28th – Round 12 – Bachtiar, Ahmad Ina – 0-1 – Szabo, Ladislav – G34 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nf3 c5 6. O-O cxd4 7. Nxd4 Nc6 8. Nc3 Nxd4 9. Qxd4 d6 10. Qd2 Rb8
1966 Hungary – Round 1 – Filep, Tibor – 0-1 – Bokor, Istvan – G2 1. c4 Nf6 2. Nc3 c5 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nc6 6. d4 cxd4 7. Nxd4 O-O 8. O-O Nxd4 9. Qxd4 d6 10. Qd2 Qc7
1966 La Habana olm fin-A – Round 3 – Bilek, Istvan – 1/2-1/2 – Bolbochan, J. – G9 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. d4 c5 6. c4 cxd4 7. Nxd4 Nc6 8. Nc3 Nxd4 9. Qxd4 d6 10. Qd2 Be6
1966 Le Havre – Round 10 – Gereben, Erno – 1/2-1/2 – Thiellement, Andre – G45 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. c4 c5 5. Nc3 Nc6 6. d4 cxd4 7. Nxd4 O-O 8. O-O Nxd4 9. Qxd4 d6 10. Qd2 Rb8
1967 YUG-URS women – Round 12 – Kushnir, Alla – 1/2-1/2 – Liljak, Milka – G17 1. Nf3 Nf6 2. g3 c5 3. c4 g6 4. Bg2 Bg7 5. O-O O-O 6. d4 cxd4 7. Nxd4 Nc6 8. Nc3 Nxd4 9. Qxd4 d6 10. Qd2 a6
1968 It Buesum GER – Round 2 – Kolarov, Atanas S. – 1/2-1/2 – Tringov, Georgi P – G10 1. Nf3 Nf6 2. g3 c5 3. Bg2 Nc6 4. O-O g6 5. d4 cxd4 6. Nxd4 Bg7 7. c4 O-O 8. Nc3 Nxd4 9. Qxd4 d6 10. Qd2 a6
1968 Lugano olm - Round 1 - Pfleger, Helmut, Dr. - 1/2-1/2 - Janata, Michael - G471 1. Nf3 Nf6 2. c4 c5 3. g3 Nc6 4. Bg2 g6 5. O-O Bg7 6. d4 cxd4 7. Nxd4 Nxd4 8. Qxd4 O-O 9. Nc3 d6 10. Qd2 Be6
1968 New York ch-USA – Round 8 – Weinberger, Tibor – 1/2-1/2 – Zuckerman, Bernard – G46 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. c4 O-O 5. Nc3 c5 6. d4 cxd4 7. Nxd4 Nc6 8. O-O Nxd4 9. Qxd4 d6 10. Qd2 Rb8
1969 Buenos Aires – Round 5 – Schweber, Samuel – 1/2-1/2 – Pelikán, Jiří – G30 1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 g6 5. Nc3 Nc6 6. g3 Bg7 7. Bg2 O-O 8. O-O Nxd4 9. Qxd4 d6 10. Qd2 Rb8
1969 Vrsac – Round 15 – Csom, Istvan – 1/2-1/2 – Janosevic, Dragoljub – G92 1. Nf3 c5 2. g3 Nf6 3. Bg2 Nc6 4. O-O g6 5. d4 cxd4 6. Nxd4 Bg7 7. c4 O-O 8. Nc3 Nxd4 9. Qxd4 d6 10. Qd2 Rb8

A39l — Symmetrical, Main Line 7.d4 (1933)

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 Nxd4 9.Qxd4 d6 10.Qd2

Les coups candidats

10…Rb8 — 42.6% (386 parties)

Ambassadeurs : Parma, Bruno (4x), Bobotsov, Milko G (3x), Csom, Istvan (2x), Lossa, Guenther (1x), Kieninger, Georg (1x), Smejkal, Jan (1x), Janata, Michael (1x), Gonzalez Vidal, Yuri (1x)

10…a6 — 19.3% (175 parties)

Ambassadeurs : Manakova, Maria (2x), Arkell, Keith C (2x), Buenafe Moya, Javier (2x), Kolarov, Atanas S. (1x), Tringov, Georgi P (1x), Kushnir, Alla (1x), Liljak, Milka (1x), Damjanovic, Mato (1x)

10…Qc7 — 16.8% (152 parties)

Ambassadeurs : Hiebler, Laura (2x), Decker, Arnold Sheldon (1x), Rabar, Braslav (1x), Udovcic, Mijo (1x), Eugenio, Sarah De Oliveira (1x), Shashin, Boris (1x), Shatskes, Boris A (1x), Vyslouzil, Antonin (1x)

10…Be6 — 13.5% (122 parties)

Ambassadeurs : Pirc, Vasja (3x), Pfleger, Helmut, Dr. (3x), Kolarov, Atanas S. (2x), Tichy, Vladimir (1x), Smejkal, Jan (1x), Dilworth, AJ. (1x), Rhodes, GI. (1x), Kozma, Julius (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	10…Rb8	10…a6	10…Qc7	10…Be6
<1800	37	49%	24%	14%	8%
1800-2200	421	45%	19%	21%	7%
2200-2600	335	39%	21%	10%	21%
2600+	1	—	—	—	100%

Évolution par décennie (% des parties)

Décennie	N parties	10…Rb8	10…a6	10…Qc7	10…Be6
1950s	9	22%	—	44%	11%
1960s	49	41%	14%	12%	31%
1970s	30	40%	20%	10%	23%
1980s	44	39%	18%	20%	20%
1990s	146	40%	21%	18%	15%
2000s	245	49%	23%	13%	9%
2010s	302	40%	18%	18%	12%
2020s	82	41%	16%	21%	12%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
10…Rb8	40%	41%	▲ +1.1%
10…a6	18%	16%	▼ -2.4%
10…Qc7	18%	21%	▲ +2.5%
10…Be6	12%	12%	+0.3%

Parties historiques

10…Rb8 — 42.6% (386 parties)

1952 — Parak, Frantisek vs Jost, Felix — 1-0 — Helsinki olm
1956 — GIDEON SUNDAY vs Ujtelky, Maximilián Samuel Rudolf — 1-0 — Marianske Lazne
1960 — Nielsen, Axel vs Rantanen, Matti — 1-0 — Leipzig GER
1960 — Matulovic, Milan vs Trifunovic, Petar — 1-0 — Sarajevo BIH
1960 — Bobotsov, Milko G vs Prahov, Valentin — 1/2-1/2 — BUL-ch14 Sofia BUL

10…a6 — 19.3% (175 parties)

1964 — Damjanovic, Mato vs Hort, Vlastimil — 1-0 — Kecskemet HUN
1964 — Stefanov, Josif Jovchev vs Popov, Luben — 1-0 — Sofia BUL
1964 — Partyka, Kazimierz vs Balcerowski, Witold — 0-1 — Warsaw ch-POL
1965 — Bak, Istvan vs Pietzsch, Wolfgang — 1/2-1/2 — Havana CUB
1967 — Kushnir, Alla vs Liljak, Milka — 1/2-1/2 — Budva MNE

10…Qc7 — 16.8% (152 parties)

1950 — Decker, Arnold Sheldon vs Rabar, Braslav — 1-0 — telex
1953 — Udovcic, Mijo vs Eugenio, Sarah De Oliveira — 1-0 — Venice ITA
1955 — Vyslouzil, Antonin vs Betak Miroslav — 1-0 — Prague CZE
1956 — Bisguier, Arthur B vs Elter, Sophia — 1-0 — Detroit, MI USA
1960 — Witkowski, Stefan vs Filipowicz, Andrzej — 1/2-1/2 — Poland ch

10…Be6 — 13.5% (122 parties)

1958 — Kozma, Julius vs Fuderer, Andrija — 0-1 — 13th Olympiad final A
1962 — Kolarov, Atanas S. vs Pirc, Vasja — 1/2-1/2 — ?
1962 — Pirc, Vasja vs Lengyel, Levente — 1/2-1/2 — Kecskemet HUN
1962 — Pirc, Vasja vs Portisch, Lajos — 1/2-1/2 — Kecskemet HUN
1963 — Kortchnoi, V. vs EDEN GLORY — 1/2-1/2 — Leningrad ch-URS

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