A39m — English: Symmetrical, Main Line 7.d4, 10.Qd3

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.Qd3 * ● Trait aux Noirs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plan principal. Exploiter la case forte e4….

Atouts. Les Blancs s'appuient sur une majorité de pions à l'aile_dame (3 contre 2), les cases fortes e4, f4, b5 et d5, un fou actif en g2, la paire de fous et la colonne semi-ouverte d.

Côté adverse. Les fous enfermés en g7 et c8.

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

Plans. Bg5 (Clouer Nf6).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plan principal. Exploiter la case forte g4….

Atouts. Les Noirs s'appuient sur une majorité de pions à l'centre (2 contre 1), les cases fortes g4 et f5, la paire de fous et la colonne semi-ouverte c.

Côté adverse. Le fou enfermé en c1.

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

Plans. ...Bf5 (Développer Bc8) ; ...d5 (Rupture) ; ...e6 (Rupture) ; ...e5 (Rupture).

Avantages

Faiblesses adverses

Diagonale active

Plans

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	● centre 2v1

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● e4 (3v1), ● f4 (2v0), ● b5 (2v0), ● d5 (4v1)	● g4 (2v0), ● f5 (2v1)
Cases faibles	—	—
Centre	● d4 (1v0), ● d5 (4v1), ● e4 (3v1)	● e5 (1v0)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● d	● c

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bg2	● Bg2 Actif (mob. 7)
Bg7		● Bg7 Enfermé (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	semi-ouvert
Ruptures	● c4-c5, ● e2-e3, ● f2-f3	● …d6-d5, ● …e7-e6, ● …e7-e5

Partie
1928 BCF Ch 21. Major Open – Round 5 – Menchik, Vera – 1/2-1/2 – Koltanowski, George – G5 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. Qd3 Nd7
1955 CSR Ch – Round 2 – Pithart, Frantisek – 1-0 – Ujtelky, Maximilian – G15 1. Nf3 c5 2. c4 g6 3. Nc3 Bg7 4. g3 Nc6 5. Bg2 Nf6 6. d4 cxd4 7. Nxd4 O-O 8. O-O Nxd4 9. Qxd4 d6 10. Qd3 Qa5
1963 Amsterdam – Round 1 – Dunkelblum, Arthur – 1/2-1/2 – Bertok, Mario Jr. – G8 1. Nf3 c5 2. c4 g6 3. d4 Bg7 4. Nc3 Nf6 5. g3 O-O 6. Bg2 Nc6 7. O-O cxd4 8. Nxd4 Nxd4 9. Qxd4 d6 10. Qd3 Qa5
1963 Sarajevo – Round 6 – Gligorić, Svetozar – 1/2-1/2 – Szabo, Laszlo – G32 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. Qd3 Qa5
1964 Amsterdam Interzonal – Round 16 – Reshevsky, Samuel – 1/2-1/2 – Stein, Leonid – G14 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. Qd3 Be6
1964 ARG Ch – Round 3 – Garcia Rodriguez, Raimundo – 1-0 – Calneggia, Raul – G11 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. c4 c5 6. Nc3 Nc6 7. d4 cxd4 8. Nxd4 Nxd4 9. Qxd4 d6 10. Qd3 Nd7
1965 Pardubice – Round 1 – Pithart, Frantisek – 1/2-1/2 – Cibulka, Vladimir – G24 1. Nf3 Nf6 2. c4 c5 3. g3 g6 4. Bg2 Bg7 5. O-O O-O 6. Nc3 Nc6 7. d4 cxd4 8. Nxd4 Nxd4 9. Qxd4 d6 10. Qd3 Nd7
1966 Mar del Plata 27th – Round 1 – Bolbochan, J. – 1/2-1/2 – Stein, Leon Rico – G2 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. g3 O-O 5. Bg2 c5 6. O-O cxd4 7. Nxd4 Nc6 8. Nc3 Nxd4 9. Qxd4 d6 10. Qd3 Ng4
1966 New York ch-USA – Round 8 – Reshevsky, Samuel – 1-0 – Zuckerman, Bernard – G43 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. d4 c5 5. c4 cxd4 6. Nxd4 Nc6 7. Nc3 O-O 8. O-O Nxd4 9. Qxd4 d6 10. Qd3 Ng4
1966 Tbilisi ch-URS – Round 21 – Krogius, Nikolai V – 0-1 – Osnos, Viatcheslav – G188 1. c4 c5 2. Nc3 Nc6 3. Nf3 g6 4. g3 Bg7 5. Bg2 Nf6 6. O-O O-O 7. d4 cxd4 8. Nxd4 Nxd4 9. Qxd4 d6 10. Qd3 Qa5
1967 Rubinstein Memorial – Round 15 – Flohr, Salo – 1/2-1/2 – Filipowicz, Andrzej – G60 1. c4 c5 2. Nc3 g6 3. g3 Bg7 4. Bg2 Nc6 5. Nf3 Nf6 6. O-O O-O 7. d4 cxd4 8. Nxd4 Nxd4 9. Qxd4 d6 10. Qd3 1/2-1/2
1968 Buenos Aires Open – Round 4 – Garcia Rodriguez, Raimundo – 1-0 – Hase, Ricardo – G6 1. Nf3 Nf6 2. g3 c5 3. Bg2 Nc6 4. O-O g6 5. c4 Bg7 6. Nc3 O-O 7. d4 cxd4 8. Nxd4 Nxd4 9. Qxd4 d6 10. Qd3 Qa5
1968 URS Team Ch – Round 1 – Geller, Efim P – 1/2-1/2 – Mosionzhik, Ilya – G197 1. Nf3 Nf6 2. c4 c5 3. Nc3 Nc6 4. g3 g6 5. Bg2 Bg7 6. d4 cxd4 7. Nxd4 O-O 8. O-O Nxd4 9. Qxd4 d6 10. Qd3 Nd7
1969 Quito/Guayaquil zt – Round ? – Garcia Martinez, Silvino – 1/2-1/2 – Jimenez Zerquera, Eleazar – G1 1. c4 c5 2. Nf3 Nf6 3. g3 g6 4. d4 cxd4 5. Nxd4 Bg7 6. Bg2 Nc6 7. Nc3 Nxd4 8. Qxd4 O-O 9. O-O d6 10. Qd3 Qc7
1975 URS Team Ch – Round 4 – Petrosian, Arshak B – 1-0 – Geldimamedov, Hodja – G575 1. Nf3 Nf6 2. g3 c5 3. c4 Nc6 4. Bg2 g6 5. O-O Bg7 6. d4 cxd4 7. Nxd4 O-O 8. Nc3 Nxd4 9. Qxd4 d6 10. Qd3 Qb6
1990 Linares 8th – Round 9 – Jussupow, Artur – 1-0 – Gelfand, Boris – G51 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. g3 O-O 5. Bg2 c5 6. O-O cxd4 7. Nxd4 Nc6 8. Nc3 Nxd4 9. Qxd4 d6 10. Qd3 Nd7
FIDE Candidates 2014 – Round 3.3 – Svidler, Peter – 1/2-1/2 – Kramnik, Vladimir – G11 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. g3 g6 5. d4 cxd4 6. Nxd4 Bg7 7. Bg2 O-O 8. O-O Nxd4 9. Qxd4 d6 10. Qd3 Be6
World Blitz 2009 – Round 3 – Kramnik, Vladimir – 1/2-1/2 – Anand, Viswanathan – G30 1. Nf3 c5 2. c4 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nc3 Nc6 6. d4 cxd4 7. Nxd4 O-O 8. O-O Nxd4 9. Qxd4 d6 10. Qd3 Be6

A39m — Symmetrical Main Line

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.Qd3

Les coups candidats

10…a6 — 36.4% (1827 parties) →

Ambassadeurs : Macieja, Bartlomiej (23x), Tocklin, Tomi (13x), Wornath, Kai (12x), Vasiukov, Evgeni (10x), Senzacqua, Fabrizio (10x), Cvitan, Ognjen (10x), Linqvist, Grels (8x), Wojtkiewicz, Aleksander (7x)

10…Rb8 — 18.7% (938 parties) →

Ambassadeurs : Szekely, Peter (3x), Abildgaard, Kenneth (3x), Schmidt, Markus (3x), Hermaneck, Helmut (2x), Gunnarsson, Jon Viktor (2x), Spassov, Liuben (2x), Skodzek, Andreas (2x), Kristensen, Thomas Overgaard (2x)

10…Bf5 — 17.9% (900 parties) →

Ambassadeurs : Kosic, Dragan (6x), Timman, Jan H (5x), Derjabin, Ilja (4x), Andersson, Ulf (4x), Tal, Mikhail (3x), Moreira, Jose Americo (3x), Popov, Vladimir Valentinovich (3x), Yakimenko, Alexander A. (3x)

10…Nd7 — 11.8% (590 parties)

Ambassadeurs : Arkell, Keith C (20x), Suba, Mihai (3x), Hauge, Lars Oskar (3x), Villiers, Thomas (3x), Cibulka, Vladimir (2x), De La Espriella Landgraf, Alejandro (2x), Damjanovic, Mato (2x), Blocker, Calvin (2x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	10…a6	10…Rb8	10…Bf5	10…Nd7
<1800	88	33%	33%	15%	10%
1800-2200	1853	31%	26%	17%	12%
2200-2600	2225	39%	11%	22%	12%
2600+	65	69%	3%	17%	2%

Évolution par décennie (% des parties)

Décennie	N parties	10…a6	10…Rb8	10…Bf5	10…Nd7
1920s	1	—	—	—	100%
1930s	2	—	100%	—	—
1950s	4	25%	25%	25%	—
1960s	81	48%	9%	15%	12%
1970s	182	40%	13%	16%	11%
1980s	315	43%	17%	12%	11%
1990s	991	41%	20%	11%	10%
2000s	1233	36%	20%	16%	12%
2010s	1913	33%	19%	24%	12%
2020s	299	35%	15%	21%	12%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
10…a6	33%	35%	▲ +2.7%
10…Rb8	19%	15%	▼ -3.7%
10…Bf5	24%	21%	▼ -2.9%
10…Nd7	12%	12%	+0.1%

Joueurs célèbres

Champions du monde dans cette position

Tal, Mikhail — 6 parties
Kasparov, Garry — 6 parties
Smyslov, Vladimir — 5 parties
Anand, Viswanathan — 4 parties
Carlsen, Magnus — 4 parties
Kramnik, Vladimir — 3 parties
Ju, Wenjun — 2 parties
Karpov, Anatoly — 1 partie
Karpov, Aleksandr — 1 partie

Parties historiques

10…a6 — 36.4% (1827 parties)

1958 — Panno, Oscar vs Malich, Burkhard, Dr. — 1-0 — Munich GER
1961 — Roizman, Abram Y vs Khalilbeili, Sultan — 1/2-1/2 — URS-ch sf Batumi GEO
1965 — Smyslov, Vladimir vs Matulovic, Milan — 1/2-1/2 — Hamburg GER
1965 — Lengyel, Laszlo vs Geller, Efim P. — 0-1 — Beverwijk NED
1965 — Gonzalez Vidal, Yuri vs Jansson, Alfred — 0-1 — Falkoeping

10…Rb8 — 18.7% (938 parties)

1931 — Pikler, Robert vs Lovas, Gyula — 1-0 — Budapest HUN
1934 — Reinhardt, Enrique vs Antze, Oskar — 1-0 — Aachen GER
1953 — Fuchs, Reinhart vs Knothe, Karl — 1/2-1/2 — GDR-ch Jena GER
1961 — Kalkstein, Rodolfo vs Longobuco, J. — 1/2-1/2 — URU
1966 — Golombek, Harry vs Szilagyi, Gyorgy Laszlo — 0-1 — Tel Aviv ISR

10…Bf5 — 17.9% (900 parties)

1957 — Fuchs, Reinhart vs Eising, Johannes — 1/2-1/2 — Soemmerda
1964 — Lengyel, Levente vs Tal, Mikhail — 1/2-1/2 — Amsterdam NED
1964 — Lengyel, Laszlo vs Tal, Mikhail — 1/2-1/2 — Amsterdam NED
1965 — Uhlmann, Wolfgang vs Pietzsch, Wolfgang — 1/2-1/2 — Leipzig GER
1966 — Donner, Jan-Hein vs Hein-Pomar Salamanca, Arturo — 1-0 — Brunnen tt

10…Nd7 — 11.8% (590 parties)

1928 — Menchik, Vera vs Koltanowski, George — 1/2-1/2 — Tenby
1964 — Garcia Rodriguez, Raimundo vs Calneggia, Raul — 1-0 — Buenos Aires ARG
1965 — Pithart, Frantisek vs Cibulka, Vladimir — 1/2-1/2 — Pardubice CZE
1966 — Vodicka, Vlastimil vs Rop, Otakar — 1/2-1/2 — ARMY-ch13 Prague CZE
1966 — Neamtu, Serban-Constantin vs Partos, Charles — 1/2-1/2 — Bucharest ROU

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