A37x — English: Symmetrical, 5.Nf3 e5 6.O-O Nge7

1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 e5 6.O-O Nge7 * ○ Trait aux Blancs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

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Atouts. Les Blancs s'appuient sur les cases fortes b5 et d5, un avant-poste en d5 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

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Atouts. Les Noirs s'appuient sur les cases fortes b4, d4 et f5 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) ; ...e4 (Rupture).

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

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

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● b5 (2v0), ● d5 (2v1)	● b4 (2v0), ● d4 (3v1), ● f5 (2v0)
Cases faibles	—	—
Centre	● d5 (2v1), ● e4 (1v0)	● d4 (3v1), ● e5 (2v1)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bg2	● Bg2 Enfermé (mob. 2)
Bg7		● Bg7 Ok (mob. 3)
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, ● e2-e3	● …d7-d6, ● …d7-d5, ● …e5-e4, ● …f7-f6, ● …f7-f5

Partie
1963 CSR Ch sf – Round 8.6 – Stulik, Vlastimil – 1-0 – Jankovec, Ivan – G37 1. c4 c5 2. Nc3 Nc6 3. Nf3 e5 4. g3 g6 5. Bg2 Bg7 6. O-O Nge7 7. Nd5 O-O 8. Rb1 d6 9. d3 Rb8 10. Nxe7+ Qxe7
1963 Hoogovens – Round 1 – Pirc, Vasja – 0-1 – Langeweg, Kick – G15 1. Nf3 c5 2. g3 Nc6 3. Bg2 g6 4. O-O Bg7 5. c4 e5 6. Nc3 Nge7 7. a3 O-O 8. Rb1 a5 9. d3 d6 10. Ne1 f5
1964 Tel Aviv olm fin-A – Round 10 – Sliwa, Bogdan – 1/2-1/2 – Botvinnik, Mikhail – G207 1. c4 g6 2. Nc3 c5 3. g3 Bg7 4. Bg2 Nc6 5. Nf3 e5 6. O-O Nge7 7. Ne1 d6 8. Nc2 O-O 9. Rb1 Bf5 10. d3 Qd7
1967 Monte Carlo-B – Round 11 – Kozma, Julius – 1/2-1/2 – Honfi, Karoly – G25 1. c4 g6 2. Nc3 c5 3. g3 Bg7 4. Bg2 Nc6 5. Nf3 e5 6. O-O Nge7 7. a3 d6 8. Rb1 Be6 9. d3 h6 10. b4 Qd7
1967 URS-ch35 – Round 1 – Osnos, Viatcheslav – 1-0 – Tarasov, Vadim – G1 1. c4 c5 2. g3 Nc6 3. Bg2 g6 4. Nf3 Bg7 5. O-O e5 6. Nc3 Nge7 7. a3 a6 8. b4 cxb4 9. axb4 Nxb4 10. Ba3 Nbc6
1968 Goldwater Marshall – Round 5 – Sherwin, James T – 0-1 – Soltis, Andrew – G12 1. Nf3 c5 2. g3 Nc6 3. Bg2 g6 4. c4 Bg7 5. Nc3 e5 6. O-O Nge7 7. a3 d6 8. Rb1 b6 9. b4 Bb7 10. d3 O-O
1968 HUN-URS – Round ? – Forintos, Gyozo V – 0-1 – Khodos, German – G10 1. Nf3 c5 2. g3 Nc6 3. Bg2 g6 4. O-O Bg7 5. c4 e5 6. Nc3 Nge7 7. Ne1 O-O 8. d3 Rb8 9. Nc2 a6 10. Rb1 b5
1968 Lugano ol (Men) fin-A – Round 1 – Bobotsov, Milko G – 1-0 – Kostro, Jerzy – G1 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. g3 Nc6 5. Bg2 e5 6. O-O Nge7 7. a3 a6 8. Rb1 Rb8 9. b4 cxb4 10. axb4 b5
1969 Praia da Rocha zt – Round 15 – Hartston, William R – 1/2-1/2 – Bobotsov, Milko G – G43 1. Nf3 c5 2. c4 Nc6 3. Nc3 g6 4. g3 Bg7 5. Bg2 e5 6. O-O Nge7 7. a3 d6 8. Rb1 O-O 9. b4 Rb8 10. d3 b6
1971 Hoogovens – Round 1 – Hartoch, Robert G – 0-1 – Timman, Jan H – G21 1. c4 g6 2. Nc3 c5 3. g3 Bg7 4. Bg2 Nc6 5. Nf3 e5 6. O-O Nge7 7. Ne1 O-O 8. Nc2 d6 9. d3 Be6 10. Ne3 Qd7
1972 Skopje ol (Men) fin-A – Round 6 – Lombard, Andre – 1/2-1/2 – Ribli, Zoltan – G64 1. c4 g6 2. Nf3 Bg7 3. g3 c5 4. Bg2 Nc6 5. O-O e5 6. Nc3 Nge7 7. a3 a5 8. Rb1 O-O 9. Ne1 d6 10. b3 Be6
1973 Leningrad Interzonal – Round 4 – Uhlmann, Wolfgang – 0-1 – Radulov, Ivan – G5 1. c4 c5 2. Nf3 Nc6 3. Nc3 e5 4. g3 g6 5. Bg2 Bg7 6. O-O Nge7 7. Ne1 O-O 8. Nc2 d6 9. d3 Be6 10. a3 Qd7
4. London Chess Classic 2012 – Round 3.1 – Kramnik, Vladimir – 1/2-1/2 – Carlsen, Magnus – G7 1. Nf3 c5 2. c4 Nc6 3. Nc3 e5 4. g3 g6 5. Bg2 Bg7 6. O-O Nge7 7. a3 a5 8. Ne1 d6 9. Nc2 O-O 10. d3 Rb8
4. Sinquefield Cup 2016 – Round 6.2 – Aronian, Levon – 0-1 – Vachier-Lagrave, Maxime – G27 1. Nf3 c5 2. c4 Nc6 3. Nc3 e5 4. g3 g6 5. Bg2 Bg7 6. O-O Nge7 7. a3 O-O 8. b4 d5 9. cxd5 Nxd5 10. Ng5 Nc7
43. Olympiad 2018 – Round 6.7 – Adams, Michael – 1/2-1/2 – Vachier-Lagrave, Maxime – G417 1. c4 c5 2. Nf3 Nc6 3. Nc3 e5 4. g3 g6 5. Bg2 Bg7 6. O-O Nge7 7. a3 O-O 8. Ne1 d6 9. Nc2 Be6 10. Ne3 Qd7
6. World Blitz 2010 – Round 15.5 – Gelfand, Boris – 1/2-1/2 – Vachier-Lagrave, Maxime – G104 1. c4 g6 2. Nc3 c5 3. g3 Bg7 4. Bg2 Nc6 5. Nf3 e5 6. O-O Nge7 7. Ne1 O-O 8. Nc2 d6 9. Ne3 f5 10. d3 g5
Amber Rapidplay 2002 – Round 8 – Bareev, Evgeny – 1-0 – Almasi, Zoltan – G35 1. Nf3 c5 2. c4 Nc6 3. Nc3 e5 4. g3 g6 5. Bg2 Bg7 6. O-O Nge7 7. a3 O-O 8. Rb1 a5 9. d3 d6 10. Ne1 Be6
Baku FIDE Grand Prix 2014 – Round 5.5 – Nakamura, Hikaru – 1/2-1/2 – Dominguez Perez, Leinier – G29 1. c4 c5 2. Nf3 Nc6 3. Nc3 e5 4. g3 g6 5. Bg2 Bg7 6. O-O Nge7 7. a3 O-O 8. Rb1 d5 9. cxd5 Nxd5 10. Nxd5 Qxd5
London Classic Elite blitz 6th 2014 – Round 1.3 – Caruana, Fabiano – 0-1 – Nakamura, Hikaru – G3 1. Nf3 c5 2. g3 Nc6 3. Bg2 e5 4. O-O g6 5. c4 Bg7 6. Nc3 Nge7 7. Ne1 d6 8. Nc2 Be6 9. Ne3 O-O 10. Ned5 Rb8
Niksic 1983 – Round 4 – Andersson, Ulf 1949 – 1/2-1/2 – Ivanovic, Bozidar – G32 1. Nf3 c5 2. g3 Nc6 3. Bg2 g6 4. c4 Bg7 5. Nc3 e5 6. O-O Nge7 7. a3 O-O 8. Rb1 d6 9. b4 Bf5 10. d3 Qd7
Norway Chess blitz 2nd 2014 – Round 9.3 – Svidler, Peter – 1/2-1/2 – Grischuk, Alexander – G35 1. c4 c5 2. Nf3 Nc6 3. Nc3 e5 4. g3 g6 5. Bg2 Bg7 6. O-O Nge7 7. a3 O-O 8. Ne1 d6 9. Nc2 Be6 10. d3 d5
Norway Supreme Masters Blitz 2013 – Round 7.4 – Carlsen, Magnus – 1-0 – Nakamura, Hikaru – G34 1. g3 g6 2. Bg2 Bg7 3. Nf3 e5 4. O-O c5 5. c4 Nc6 6. Nc3 Nge7 7. a3 O-O 8. b4 cxb4 9. axb4 e4 10. Ng5 f5
SuperUnited Blitz 2022 – Round 13.1 – Firouzja, Alireza – 0-1 – Vachier-Lagrave, Maxime – G61 1. Nf3 c5 2. c4 Nc6 3. Nc3 e5 4. g3 g6 5. Bg2 Bg7 6. O-O Nge7 7. b3 d5 8. cxd5 Nxd5 9. Qc2 Bf5 10. e4 Ndb4
World Blitz 2016 – Round 12.2 – Karjakin, Sergey – 1/2-1/2 – Vachier-Lagrave, Maxime – G473 1. Nf3 c5 2. c4 Nc6 3. Nc3 e5 4. g3 g6 5. Bg2 Bg7 6. O-O Nge7 7. a3 O-O 8. Ne1 a5 9. Nc2 d6 10. d3 Be6
World Blitz 2017 – Round 18.34 – Duda, Jan-Krzysztof – 1-0 – Ponkratov, Pavel – G942 1. Nf3 c5 2. g3 Nc6 3. Bg2 e5 4. c4 g6 5. Nc3 Bg7 6. O-O Nge7 7. Ne1 d6 8. Nc2 O-O 9. Ne3 Rb8 10. a3 a6
World Blitz 2019 – Round 18.36 – Utegaliyev, Azamat – 0-1 – Le, Quang Liem – G1217 1. Nf3 c5 2. g3 Nc6 3. Bg2 e5 4. O-O g6 5. c4 Bg7 6. Nc3 Nge7 7. Ne1 O-O 8. Nc2 d6 9. d3 Be6 10. Ne3 Qd7

A37x — Symmetrical

1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 e5 6.O-O Nge7

Eval: [+0.30]

Les coups candidats

7.d3 — 42.5% (1960 parties) →

Ambassadeurs : Miezis, Normunds (9x), Titz, Heimo (8x), Gomes, Mary Ann (6x), Gdanski, Jacek (5x), Bobotsov, Milko G (4x), Golcman, Evgeny (4x), Auger, Bertrand (4x), Savon, Vladimir (3x)

7.a3 — 28.0% (1290 parties)

Ambassadeurs : Sienczewski, Zbigniew (9x), Mitrandzas, Athanasios (9x), Kjartansson, Gudmundur (7x), Ksieski, Zbigniew (6x), Petursson, Margeir (5x), Donchenko, Alexander (5x), Bobotsov, Milko G (4x), Drasko, Milan (4x)

7.Ne1 — 21.7% (1001 parties)

Ambassadeurs : Miezis, Normunds (7x), Ftacnik, Lubomir (6x), Wojtkiewicz, Aleksander (4x), Danner, Georg (4x), Jovic, Stanoje (4x), Zupe, Miran (4x), Karlsson, Lars 1937 (3x), Schnitzspan, Lothar (3x)

7.Rb1 — 3.5% (160 parties)

Ambassadeurs : Negulescu, Adrian (2x), Adamski, Jan (2x), Wedberg, Tom (2x), Lehmann, Erwin (2x), Nauschuetz, Ernst (2x), Heliot, Xabi (2x), Tichy, Vladimir (1x), Breck, Jakub (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	7.d3	7.a3	7.Ne1	7.Rb1
<1800	74	55%	18%	8%	3%
1800-2200	1552	48%	24%	17%	5%
2200-2600	2505	37%	31%	27%	3%
2600+	60	12%	53%	32%	2%

Évolution par décennie (% des parties)

Décennie	N parties	7.d3	7.a3	7.Ne1	7.Rb1
1950s	4	100%	—	—	—
1960s	40	62%	18%	12%	2%
1970s	109	57%	23%	13%	5%
1980s	226	49%	21%	21%	5%
1990s	632	50%	20%	22%	4%
2000s	1187	49%	22%	20%	5%
2010s	2026	35%	35%	23%	3%
2020s	391	41%	28%	24%	2%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
7.d3	35%	41%	▲ +6.2%
7.a3	35%	28%	▼ -7.6%
7.Ne1	23%	24%	+0.5%
7.Rb1	3%	2%	▼ -0.9%

Joueurs célèbres

Champions du monde dans cette position

Carlsen, Magnus — 2 parties
Ding, Liren — 2 parties
Gukesh D — 2 parties
Botvinnik, Mikhail — 1 partie
Karpov, Anatoly — 1 partie
Kramnik, Vladimir — 1 partie

Parties historiques

7.d3 — 42.5% (1960 parties)

1957 — Holm, Sejer vs Petersen, Finn — 0-1 — Odense DEN
1958 — Byvshev, Vasily vs Kholmov, Ratmir D — 0-1 — Tashkent ch URS sf
1958 — Smyslov, Dmitri vs Bobotsov — 1-0 — Munich ol
1959 — Jaeger, Walter vs Lehmann, Heinz — 0-1 — FRG-ch Nuerenberg GER
1960 — Peterson, Andrejs vs Osnos, Viatcheslav — 1/2-1/2 — Vilnius LTU

7.a3 — 28.0% (1290 parties)

1963 — Pirc, Vasja vs Langeweg, Kick — 0-1 — Beverwijk NED
1967 — Osnos, Viatcheslav vs Tarasov, Vadim — 1-0 — Kharkov ch-URS
1967 — Kozma, Julius vs Honfi, Karoly — 1/2-1/2 — Monte Carlo MNC
1968 — Marszalek, Rafal vs Zoltek, Tadeusz — 1/2-1/2 — Lodz POL
1968 — Bobotsov, Milko G vs Kostro, Jerzy — 1-0 — Lugano SUI

7.Ne1 — 21.7% (1001 parties)

1964 — Sliwa, Bogdan vs Botvinnik, Mikhail — 1/2-1/2 — Tel Aviv ISR
1965 — Neamtu, Serban-Constantin vs Moisini, Ion — 1/2-1/2 — Bucharest ROU
1966 — Lombardy, William J vs Lopez Masis, Kenard Evans — 1/2-1/2 — Canada
1968 — Forintos, Gyozo V vs Khodos, German — 0-1 — Soviet Union
1969 — Schmidt, Waldemar vs Gipslis, Aivars — 0-1 — Lublin Lublin POL

7.Rb1 — 3.5% (160 parties)

1968 — Tichy, Vladimir vs Breck, Jakub — 1-0 — Prague CZE
1976 — Holloway, Nigel J vs Byway, Paul V — 1-0 — Islington ENG
1976 — Manasterski, Lutoslaw vs Schaufelberger, Heinz — 1-0 — Sandomierz Vitrobud POL
1978 — Iliev Ivanov, Andrey vs Tseshkovsky, Vitaly — 1-0 — Ashkhabad
1978 — Adamski, Jan vs Wedberg, Tom — 1/2-1/2 — Buenos Aires olm

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