A37m — English: Symmetrical, 5.Nf3 e6 6.O-O Nge7 7.e3

1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 e6 6.O-O Nge7 7.e3 * ● Trait aux Noirs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Atouts. Les Blancs s'appuient sur les cases fortes f4 et b5 et la paire de fous.

Côté adverse. Le fou enfermé en c8 et le roi resté au centre.

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

Plans. d3 (Libérer Bc1) ; h3 (Empêcher ...Bg4).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Atouts. Les Noirs s'appuient sur les cases fortes b4, e5 et f5, un fou actif en g7 et la paire de fous.

Côté adverse. Les fous enfermés en c1 et g2.

En contrepartie. Le roi n'est pas encore à l'abri et plusieurs pièces dorment encore (le fou c8 et les tours a8 et h8).

Plans. O-O (Mettre le roi en sécurité, connecter les tours) ; ...d6 (Libérer Bc8) ; ...Bg4 (Clouer Nf3) ; ...d5 (Rupture) ; ...e5 (Rupture).

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● d2→e3, f2→e3, f2→g3, h2→g3	● d7→e6, f7→e6, f7→g6, h7→g6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● f4 (2v0), ● b5 (2v0)	● b4 (2v0), ● e5 (2v1), ● f5 (3v0)
Cases faibles	—	—
Centre	● e4 (1v0)	● d4 (3v2), ● e5 (2v1)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bg2	● Bg2 Enfermé (mob. 2)
Bg7		● Bg7 Actif (mob. 6)
Bc8		● Bc8 Non développé (mob. 0)
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	● d2-d3, ● e3-e4	● …d7-d6, ● …d7-d5, ● …e6-e5, ● …f7-f6, ● …f7-f5

Partie
1944 La Plata Jockey Club – Round 5 – Pelikan, Jorge – 1-0 – Iliesco, Juan – G7 1. Nf3 c5 2. g3 Nc6 3. Bg2 g6 4. O-O Bg7 5. c4 e6 6. Nc3 Nge7 7. e3 O-O 8. d4 cxd4 9. Nxd4 d5 10. cxd5 exd5
1960 Olympiad prel I – Round 4 – Hoen, Ragnar Harald – 1/2-1/2 – Raisa, Unto – G13 1. Nf3 c5 2. g3 Nc6 3. Bg2 g6 4. c4 Bg7 5. Nc3 e6 6. O-O Nge7 7. e3 O-O 8. d4 cxd4 9. exd4 d5 10. cxd5 Nxd5
1964 Kiev ch-URS – Round 1 – Bannik, Anatolij – 0-1 – Shamkovich, Leonid – G4 1. c4 c5 2. Nc3 g6 3. g3 Bg7 4. Bg2 Nc6 5. Nf3 e6 6. O-O Nge7 7. e3 Nf5 8. a3 O-O 9. b4 d5 10. cxd5 exd5
1965 Budapest2 – Round 3 – Krogius, Nikolai V – 1/2-1/2 – Malich, Burkhard, Dr. – G21 1. c4 c5 2. Nc3 g6 3. g3 Bg7 4. Bg2 Nc6 5. Nf3 e6 6. O-O Nge7 7. e3 O-O 8. d4 cxd4 9. Nxd4 d5 10. cxd5 exd5
1965 Capablanca Memorial – Round 1 – Doda, Zbigniew – 1/2-1/2 – Donner, Jan-Hein – G11 1. Nf3 c5 2. g3 Nc6 3. Bg2 g6 4. c4 Bg7 5. Nc3 e6 6. O-O Nge7 7. e3 d5 8. cxd5 exd5 9. d4 cxd4 10. Nxd4 O-O
1965 Capablanca Memorial – Round 19 – Doda, Zbigniew – 0-1 – Fischer, Robert J – G197 1. Nf3 c5 2. g3 g6 3. Bg2 Bg7 4. O-O Nc6 5. c4 e6 6. Nc3 Nge7 7. e3 O-O 8. d4 cxd4 9. Nxd4 Nxd4 10. exd4 d6
1965 Hamburg etc – Round 1 – Pfleger, Helmut, Dr. – 1-0 – Van den Berg, Cees – G48 1. Nf3 c5 2. c4 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nc3 e6 6. O-O Nge7 7. e3 O-O 8. d4 cxd4 9. Nxd4 Nxd4 10. exd4 d5
1965 Hamburg etc – Round 1 – Pfleger, Helmut, Dr. – 1/2-1/2 – Matanovic, Aleksandar – G49 1. Nf3 c5 2. c4 Nc6 3. g3 g6 4. Bg2 Bg7 5. O-O e6 6. Nc3 Nge7 7. e3 O-O 8. d4 cxd4 9. Nxd4 d5 10. cxd5 Nxd4
1966 La Habana olm fin-A – Round 10 – Kavalek, Lubomir – 1-0 – Soos, Balint – G178 1. c4 c5 2. Nc3 g6 3. g3 Bg7 4. Bg2 Nc6 5. Nf3 e6 6. O-O Nge7 7. e3 O-O 8. b3 b6 9. Bb2 Bb7 10. Na4 Bxb2
1966 La Habana olm fin-A – Round 9 – Bolbochan, J. – 1/2-1/2 – Benko, Pal – G156 1. c4 c5 2. Nc3 g6 3. g3 Bg7 4. Bg2 Nc6 5. Nf3 e6 6. O-O Nge7 7. e3 O-O 8. d4 cxd4 9. Nxd4 Nxd4 10. exd4 d5
1966 Moscow – Round 1 – Petrosian, Tigran A. – 1/2-1/2 – Geller, Efim P – G3 1. c4 g6 2. g3 Bg7 3. Bg2 c5 4. Nc3 Nc6 5. Nf3 e6 6. O-O Nge7 7. e3 O-O 8. d4 cxd4 9. Nxd4 d5 10. cxd5 Nxd5
1966 Moscow Tch-SU – Round 1 – Etruk, Rein T – 1/2-1/2 – Polugaevsky, Lev – G22 1. Nf3 c5 2. g3 g6 3. Bg2 Bg7 4. c4 Nc6 5. Nc3 e6 6. O-O Nge7 7. e3 Nf5 8. Ne1 O-O 9. a3 Nfe7 10. Na4 b6
1966 Oberhausen ol women – Round 1 – Heemskerk, Fenny – 0-1 – Nedeljkovic, Verica – G7 1. Nf3 c5 2. c4 g6 3. g3 Bg7 4. Bg2 Nc6 5. O-O e6 6. Nc3 Nge7 7. e3 O-O 8. d4 cxd4 9. exd4 d5 10. cxd5 Nxd5
1966 URS Team Ch – Round ? – Petrosian, Tigran V – 1/2-1/2 – Geller, Efim P – G6 1. c4 g6 2. g3 Bg7 3. Bg2 c5 4. Nc3 Nc6 5. Nf3 e6 6. O-O Nge7 7. e3 O-O 8. d4 cxd4 9. Nxd4 d5 10. cxd5 Nxd5
1967 Yugoslavia – Round 1 – Janosevic, Dragoljub – 1-0 – Ivkov, Borislav – G27 1. Nf3 g6 2. g3 Bg7 3. c4 c5 4. Bg2 Nc6 5. Nc3 e6 6. O-O Nge7 7. e3 Nf5 8. d3 O-O 9. e4 Nfd4 10. Nxd4 Nxd4
1968 IBM-B – Round 4 – Van Oosterom, Hennie – 1/2-1/2 – Hartoch, Robert G – G16 1. c4 g6 2. g3 c5 3. Bg2 Bg7 4. Nf3 Nc6 5. O-O e6 6. Nc3 Nge7 7. e3 Nf5 8. b3 O-O 9. Bb2 d5 10. cxd5 exd5
1968 It Buesum GER – Round 10 – Huebner, Robert – 1/2-1/2 – Parma, Bruno – G47 1. Nf3 c5 2. c4 Nc6 3. g3 g6 4. Bg2 Bg7 5. O-O e6 6. e3 Nge7 7. Nc3 O-O 8. d4 cxd4 9. Nxd4 Nxd4 10. exd4 d5
1968 Vinkovci – Round 2 – Bertok, Mario Jr. – 1/2-1/2 – Matanovic, Aleksandar – G14 1. c4 c5 2. Nf3 Nc6 3. g3 g6 4. Bg2 Bg7 5. O-O e6 6. e3 Nge7 7. Nc3 O-O 8. d4 cxd4 9. Nxd4 d5 10. cxd5 Nxd4
1969 Hoogovens – Round 2 – Benko, Pal – 1-0 – Geller, Efim P – G24 1. Nf3 c5 2. c4 g6 3. g3 Bg7 4. Bg2 Nc6 5. Nc3 e6 6. O-O Nge7 7. e3 O-O 8. d4 cxd4 9. Nxd4 d5 10. cxd5 exd5
1969 Praia da Rocha zt – Round 9 – Hartston, William R – 1-0 – Bilek, Istvan – G28 1. Nf3 g6 2. g3 Bg7 3. c4 c5 4. Bg2 Nc6 5. O-O e6 6. Nc3 Nge7 7. e3 O-O 8. d4 d6 9. b3 Nf5 10. Ne2 cxd4
1969 Tallinn it – Round 11 – Gufeld, Eduard – 1/2-1/2 – Gipslis, Aivars – G48 1. g3 c5 2. Bg2 g6 3. Nf3 Bg7 4. O-O Nc6 5. c4 e6 6. Nc3 Nge7 7. e3 O-O 8. d4 cxd4 9. Nxd4 d5 10. cxd5 Nxd4
1969 Tallinn it – Round 8 – Etruk, Rein T – 0-1 – Gufeld, Eduard – G32 1. Nf3 g6 2. c4 Bg7 3. Nc3 c5 4. g3 Nc6 5. Bg2 e6 6. e3 Nge7 7. O-O O-O 8. d4 cxd4 9. Nxd4 d5 10. cxd5 Nxd4
1973 Leningrad Interzonal – Round 7 – Taimanov, Mark – 1/2-1/2 – Tal, Mihail – G135 1. Nf3 c5 2. c4 g6 3. g3 Bg7 4. Bg2 Nc6 5. O-O e6 6. Nc3 Nge7 7. e3 O-O 8. d4 cxd4 9. Nxd4 d5 10. cxd5 Nxd4
40. Olympiad Open 2012 – Round 9.6 – Giri, Anish – 1/2-1/2 – Gelfand, Boris – G528 1. Nf3 c5 2. c4 Nc6 3. Nc3 g6 4. g3 Bg7 5. Bg2 e6 6. O-O Nge7 7. e3 d5 8. cxd5 Nxd5 9. d4 cxd4 10. Nxd4 Nxd4
42. Olympiad 2016 – Round 10.35 – Adly, Ahmed – 1/2-1/2 – Colovic, Aleksandar – G731 1. Nf3 c5 2. g3 g6 3. Bg2 Bg7 4. O-O Nc6 5. c4 e6 6. Nc3 Nge7 7. e3 O-O 8. d4 cxd4 9. Nxd4 Nxd4 10. exd4 d5
43. Olympiad 2018 – Round 1.8 – Soares, Erikson Roberto Mauricio – 0-1 – Howell, David W L – G74 1. Nf3 g6 2. g3 Bg7 3. Bg2 c5 4. c4 Nc6 5. Nc3 e6 6. O-O Nge7 7. e3 O-O 8. d4 cxd4 9. Nxd4 Nxd4 10. exd4 d6
FIDE World Cup 2015 – Round 3.2 – Le, Quang Liem – 1/2-1/2 – So, Wesley – G344 1. Nf3 c5 2. c4 Nc6 3. Nc3 g6 4. g3 Bg7 5. Bg2 e6 6. O-O Nge7 7. e3 O-O 8. d4 cxd4 9. Nxd4 d5 10. cxd5 Nxd5
Moskou ch-URS 1976 – Round 1 – Rashkovsky, Nukhim N – 1/2-1/2 – Tal, Mikhail – G36 1. Nf3 g6 2. c4 Bg7 3. Nc3 c5 4. g3 Nc6 5. Bg2 e6 6. O-O Nge7 7. e3 O-O 8. d4 cxd4 9. Nxd4 d5 10. cxd5 Nxd5
SportAccord Blitz Men 2013 – Round 3.4 – Le, Quang Liem – 1-0 – Giri, Anish – G19 1. Nf3 g6 2. g3 Bg7 3. Bg2 c5 4. O-O Nc6 5. c4 e6 6. Nc3 Nge7 7. e3 O-O 8. d4 cxd4 9. Nxd4 d5 10. cxd5 Nxd4
Tallinn 1973 – Round 1 – Polugaevsky, Lev – 1/2-1/2 – Timman, Jan H – G40 1. Nf3 g6 2. c4 Bg7 3. Nc3 c5 4. g3 Nc6 5. Bg2 e6 6. O-O Nge7 7. e3 O-O 8. d4 cxd4 9. Nxd4 Nxd4 10. exd4 d5

A37m — Symmetrical

1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 e6 6.O-O Nge7 7.e3

Eval: [+0.07]

Les coups candidats

7…O-O — 69.2% (925 parties)

Ambassadeurs : Adorjan, Andras (7x), Vastrukhin, Oleg (7x), Espig, Lutz (5x), Doda, Zbigniew (4x), Stoll, Joachim (4x), Hulak, Krunoslav (4x), Bukal, Vladimir Jr. (4x), Schmidt, Wlodzimierz (4x)

7…Nf5 — 15.5% (207 parties)

Ambassadeurs : Etruk, Rein T (3x), Borocz, Istvan (3x), Mukhin, Evgeny B (2x), Kholmov, Ratmir D (2x), Suetin, Alexey S (2x), Hirsch, Adolf Jun. (2x), Rogobete, Nikolas Johann (2x), Bannik, Anatolij (1x)

7…d5 — 13.5% (181 parties)

Ambassadeurs : Danilovic, Aleksandar (3x), Doda, Zbigniew (2x), Ghitescu, Theodor (2x), Shamkovich, Leonid (2x), Calzetta Ruiz, Monica (2x), Goethals F (1x), Rabassa, Luis (1x), Zakharov, Igor N (1x)

7…e5 — 0.8% (11 parties)

Ambassadeurs : Andruet, Gilles (2x), Juravliov V.I. (1x), Veinger, Itzhak (1x), Parmentier, Xavier (1x), Thiel, Kuno (1x), Wolff, Heinz (1x), Lenz, Alarich (1x), Manutes, John (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	7…O-O	7…Nf5	7…d5	7…e5
<1800	36	67%	3%	25%	—
1800-2200	429	72%	11%	14%	1%
2200-2600	663	69%	19%	11%	0%
2600+	14	86%	—	14%	—

Évolution par décennie (% des parties)

Décennie	N parties	7…O-O	7…Nf5	7…d5	7…e5
1940s	1	100%	—	—	—
1950s	1	—	—	100%	—
1960s	33	67%	24%	9%	—
1970s	99	65%	20%	14%	1%
1980s	102	67%	16%	16%	2%
1990s	214	66%	17%	15%	1%
2000s	294	69%	17%	12%	1%
2010s	474	70%	15%	14%	1%
2020s	119	78%	7%	14%	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
7…O-O	70%	78%	▲ +8.1%
7…Nf5	15%	7%	▼ -7.8%
7…d5	14%	14%	▲ +0.8%
7…e5	1%	0%	▼ -0.8%

Joueurs célèbres

Champions du monde dans cette position

Tal, Mikhail — 4 parties
Smyslov, Vladimir — 1 partie
Carlsen, Magnus — 1 partie

Parties historiques

7…O-O — 69.2% (925 parties)

1944 — Pelikan, Jorge vs Iliesco, Juan — 1-0 — La Plata Jockey Club
1960 — Hoen, Ragnar Harald vs Raisa, Unto — 1/2-1/2 — Leipzig GER
1965 — Pfleger, Helmut, Dr. vs Van den Berg, Carel B — 1-0 — ?
1965 — Krogius, Nikolai V vs Malich, Burkhard, Dr. — 1/2-1/2 — Budapest HUN
1965 — Zbigniev vs Fischer, Robert J — 0-1 — Capablanca mem Havan

7…Nf5 — 15.5% (207 parties)

1964 — Bannik, Anatolij vs Shamkovich, Leonid — 0-1 — Kiev ch-URS
1966 — Golombek, Harry vs Schmid, Lothar — 1/2-1/2 — Venice ITA
1966 — Etruk, Rein T vs Polugaevsky, Lev — 1/2-1/2 — Moscow Tch-SU
1967 — Kushnir, Alla vs Gaprindashvili, Nona — 0-1 — Olympiad URS, Moscow RUS
1967 — Etruk, Rein T vs Mukhin, Evgeny B — 0-1 — Moscow RUS

7…d5 — 13.5% (181 parties)

1951 — Alexandrescu, Gheorghe vs Reicher, Emanoil-George — 1/2-1/2 — Bucharest ROU
1963 — Zakharov, Igor N vs Shamkovich, Leonid — 1/2-1/2 — Moscow RUS
1965 — Goethals F vs Rabassa, Luis — 1/2-1/2 — ?
1965 — Doda, Zbigniew vs Donner, Jan-Hein — 1/2-1/2 — Havana CUB
1971 — Mashian, Houschang vs Ghitescu, Theodor — 1/2-1/2 — Reggio nell'Emilia ITA

7…e5 — 0.8% (11 parties)

1973 — Juravliov V.I. vs Veinger, Itzhak — 1/2-1/2 — Ch USSR Corr (Team)
1986 — Thiel, Kuno vs Andruet, Gilles — 1-0 — Wuppertal II
1988 — Parmentier, Xavier vs Andruet, Gilles — 1-0 — Le Touquet op
1991 — Wolff, Heinz vs Lenz, Alarich — 1/2-1/2 — Hauenstein
1999 — Manutes, John vs Bell Brian — 1-0 — IECG

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