A37y — English: Symmetrical, 5.Nf3 e5 6.O-O Nge7 7.d3 O-O

1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 e5 6.O-O Nge7 7.d3 O-O * ○ Trait aux Blancs

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 e4, b5, d5 et g5, un avant-poste en d5 et la paire de fous.

Côté adverse. Le fou enfermé en c8.

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

Plans. Be3 (Développer 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, d4 et f5, un avant-poste en d4 et la paire de fous.

Côté adverse. Les fous enfermés en c1 et g2.

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

Plans. ...d6 (Libérer Bc8) ; ...Bg4 (Clouer Nf3) ; ...d5 (Rupture) ; ...e4 (Rupture) ; ...f6 (Rupture).

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● e2→d3, f2→g3, h2→g3, d3→c4	● f7→g6, h7→g6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● e4 (2v0), ● b5 (2v0), ● d5 (2v1), ● g5 (2v0)	● b4 (2v0), ● d4 (3v1), ● f5 (2v0)
Cases faibles	—	—
Centre	● d5 (2v1), ● e4 (2v0)	● d4 (3v1), ● e5 (2v1)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
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)	2 (c8, a8)

Sécurité du roi

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

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	semi-ouvert
Ruptures	● d3-d4, ● e2-e3	● …d7-d6, ● …d7-d5, ● …e5-e4, ● …f7-f6, ● …f7-f5

Partie
1958 Tashkent ch URS sf – Round ? – Byvshev, Vasily – 0-1 – Kholmov, Ratmir D – G1 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 e5 6. O-O Nge7 7. d3 O-O 8. Bg5 h6 9. Be3 d6 10. a3 f5
1959 FRG Ch Nuerenberg GER – Round 8 – Jaeger, Walter – 0-1 – Lehmann, Heinz – G27 1. c4 g6 2. g3 Bg7 3. Bg2 c5 4. Nc3 Nc6 5. Nf3 e5 6. O-O Nge7 7. d3 O-O 8. Nd5 d6 9. Bg5 h6 10. Bf6 Bxf6
1960 CSR Ch – Round 16 – Olexa, Vilem – 0-1 – Fichtl, Jiri – G133 1. c4 c5 2. Nf3 g6 3. g3 Bg7 4. Bg2 e5 5. d3 Ne7 6. Nc3 O-O 7. O-O Nbc6 8. Bd2 h6 9. Qc1 Kh7 10. Rb1 d6
1961 Nykobing – Round 1 – Nielsen, Axel – 1/2-1/2 – Kolvig, Bent – G3 1. c4 c5 2. Nc3 g6 3. Nf3 Bg7 4. g3 Nc6 5. Bg2 e5 6. d3 Nge7 7. O-O O-O 8. Ne1 d6 9. Nc2 f5 10. f4 a6
1961 URS-ch29 sf Novgorod – Round 14 – Savon, Vladimir – 1/2-1/2 – Kholmov, Ratmir D – G39 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 e5 6. O-O Nge7 7. d3 O-O 8. Rb1 d6 9. a3 a5 10. Ne1 f5
1962 Mar del Plata – Round 4 – Najdorf, Miguel – 1/2-1/2 – Pachman, Ludek – G45 1. Nf3 c5 2. g3 Nc6 3. Bg2 g6 4. O-O Bg7 5. d3 e5 6. c4 Nge7 7. Nc3 O-O 8. Rb1 d6 9. a3 b6 10. b4 Bb7
1962 Varna olm – Round 1 – Barcza, Gedeon – 1-0 – Hecht, Hans-Joachim – G89 1. Nf3 c5 2. g3 g6 3. Bg2 Bg7 4. c4 Nc6 5. Nc3 e5 6. d3 Nge7 7. O-O O-O 8. Ne1 d6 9. Nc2 Be6 10. Ne3 Rb8
1963 Beverwijk – Round 1 – Dunkelblum, Arthur – 1-0 – Ditt, Egon – G18 1. Nf3 c5 2. g3 Nc6 3. c4 g6 4. Bg2 Bg7 5. Nc3 e5 6. O-O Nge7 7. d3 O-O 8. Bd2 h6 9. Qc1 Kh7 10. Rb1 d6
1963 FRG Ch 07th – Round 13 – Besser, Hans – 1/2-1/2 – Hecht, Hans-Joachim – G26 1. Nf3 g6 2. g3 Bg7 3. Bg2 c5 4. c4 Nc6 5. O-O e5 6. Nc3 Nge7 7. d3 O-O 8. Rb1 d6 9. a3 Rb8 10. b4 h6
1964 Tel Aviv olm – Round 1 – Botvinnik, Mikhail – 1/2-1/2 – Bobotsov, Milko G – G1 1. c4 c5 2. Nc3 g6 3. g3 Bg7 4. Bg2 Nc6 5. Nf3 e5 6. d3 Nge7 7. O-O O-O 8. Ne1 Rb8 9. Nc2 a6 10. a4 d6
1964 Tel Aviv olm fin-A – Round 6 – Botvinnik, Mikhail – 1/2-1/2 – Bobotsov, Milko G – G116 1. c4 c5 2. Nc3 g6 3. g3 Bg7 4. Bg2 Nc6 5. Nf3 e5 6. d3 Nge7 7. O-O O-O 8. Ne1 Rb8 9. Nc2 a6 10. a4 d6
1964 WchT U26 11. fin-A – Round 2.1 – Hort, Vlastimil – 1-0 – Pelts, Roman – G19 1. c4 c5 2. Nc3 Nc6 3. Nf3 g6 4. g3 Bg7 5. Bg2 e5 6. d3 Nge7 7. O-O O-O 8. Rb1 a6 9. a3 Rb8 10. Qa4 d6
1965 Budapest – Round 1 – Filipowicz, Andrzej – 0-1 – Kadrev, Zdravko – G1 1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nf3 Nc6 5. Nc3 e5 6. d3 Nge7 7. O-O O-O 8. Rb1 Rb8 9. a3 d6 10. b4 b6
1965 Hoogovens – Round 13 – Lengyel, Laszlo – 1-0 – Van den Berg, Cees – G102 1. Nf3 c5 2. g3 Nc6 3. Bg2 e5 4. c4 g6 5. Nc3 Bg7 6. d3 Nge7 7. O-O O-O 8. Ne1 d6 9. Nc2 Be6 10. Ne3 Qd7
1966 Hoogovens 28th – Round 1 – Bilek, Istvan – 1-0 – Van den Berg, Cees – G8 1. Nf3 c5 2. c4 Nc6 3. Nc3 e5 4. d3 g6 5. g3 Bg7 6. Bg2 Nge7 7. O-O O-O 8. Ne1 d6 9. Nc2 Nf5 10. Rb1 Bd7
1966 La Habana olm prel – Round 7 – Vyzantiadis, Lazaros – 0-1 – Bobotsov, Milko G – G100 1. c4 c5 2. Nc3 g6 3. g3 Bg7 4. Bg2 Nc6 5. Nf3 e5 6. O-O Nge7 7. d3 O-O 8. Bd2 d6 9. a3 b6 10. Rb1 Bb7
1966 URS Team Ch – Round 1 – Savon, Vladimir – 1-0 – Kapengut, Albert – G73 1. Nf3 c5 2. g3 Nc6 3. Bg2 g6 4. O-O Bg7 5. c4 e5 6. Nc3 Nge7 7. d3 O-O 8. Bd2 a6 9. Ne1 Rb8 10. a4 d6
1967 FRG Ch 09th – Round 1 – Stern, Dieter – 1-0 – Hecht, Hans-Joachim – G1 1. c4 c5 2. Nf3 g6 3. g3 Bg7 4. Nc3 Nc6 5. Bg2 e5 6. d3 Nge7 7. O-O O-O 8. Rb1 d6 9. a3 f5 10. Bd2 h6
1968 Hoogovens – Round 13 – Langeweg, Kick – 0-1 – Bobotsov, Milko G – G111 1. c4 c5 2. Nc3 g6 3. g3 Bg7 4. Bg2 Nc6 5. Nf3 e5 6. O-O Nge7 7. d3 O-O 8. Rb1 d6 9. a3 a5 10. Ne1 Be6
1968 Lugano olm - Round 1 - Stull, Norbert - 0-1 - Adamski, Jan - G466 1. Nf3 g6 2. g3 Bg7 3. Bg2 c5 4. c4 Nc6 5. Nc3 e5 6. d3 Nge7 7. O-O O-O 8. Bd2 d6 9. Rb1 Bg4 10. h3 Be6
1968 POL Ch 25th – Round 12 – Schmidt, Wlodzimierz – 1-0 – Zoltek, Tadeusz – G74 1. Nf3 c5 2. c4 Nc6 3. Nc3 e5 4. d3 g6 5. g3 Bg7 6. Bg2 Nge7 7. O-O O-O 8. Ne1 d6 9. Nc2 h6 10. Rb1 Rb8
1968 SWE Ch – Round 15 – Ljungquist, Lennart – 1-0 – Horberg, Bengt-Eric – G71 1. Nf3 c5 2. c4 g6 3. g3 Bg7 4. Bg2 Nc6 5. Nc3 e5 6. d3 Nge7 7. O-O O-O 8. Bd2 h6 9. Qc1 Kh7 10. Rb1 d6
1968 Toth Memorial – Round 1 – Barcza, Gedeon – 1/2-1/2 – Barczay, Laszlo – G9 1. Nf3 c5 2. c4 g6 3. g3 Bg7 4. Bg2 Nc6 5. Nc3 e5 6. d3 Nge7 7. O-O O-O 8. Ne1 d6 9. Nc2 Rb8 10. Rb1 Be6
1968 URS Team Ch – Round 1 – Gaprindashvili, Nona – 1-0 – Titorenko, Natalia I – G191 1. Nf3 g6 2. g3 c5 3. Bg2 Nc6 4. O-O Bg7 5. d3 e5 6. c4 Nge7 7. Nc3 O-O 8. Ne1 f5 9. Nc2 Rb8 10. Ne3 a6
1969 Glasgow Congress Invitation – Round 4 – Golombek, Harry – 1/2-1/2 – Keene, Raymond D – G14 1. Nf3 c5 2. c4 g6 3. Nc3 Bg7 4. g3 Nc6 5. Bg2 e5 6. O-O Nge7 7. d3 O-O 8. Rb1 d6 9. a3 a5 10. Bd2 Rb8
Malta ol (Men) 1980 – Round 2 – Heim, Sverre – 1/2-1/2 – Ribli, Zoltan – G33 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 e5 6. d3 Nge7 7. O-O O-O 8. Ne1 d6 9. Nc2 Be6 10. Ne3 a6

A37y — Symmetrical

1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 e5 6.O-O Nge7 7.d3 O-O

Eval: [+0.29]

Les coups candidats

8.a3 — 31.2% (779 parties) →

Ambassadeurs : Rehm, Bernard (3x), Oral, Tomas (3x), Konopka, Michal (3x), Gomes, Mary Ann (3x), Sorcinelli, Andrea (3x), Pichl, Michael (3x), Tingander, Ari-Pekka (3x), Telljohann, Sven (3x)

8.Ne1 — 20.5% (513 parties)

Ambassadeurs : Barcza, Gedeon (3x), Bilek, Istvan (3x), Tella, Jussi (3x), Spangenberg, Hugo (3x), Sepp, Olav (3x), Fonte Sanchez, Claudia (3x), Romero Nunez, Wendy (3x), Sucikova, Svetlana (3x)

8.Rb1 — 17.5% (437 parties)

Ambassadeurs : Schenk, Dieter, Dr. (4x), Ferrara, Alexis (3x), Smetankin, Stanislav (3x), Santl, Anton (3x), Dashiev, Kim (3x), Hecht, Hans-Joachim (2x), Zeller, Frank (2x), Twardowski, Lukasz (2x)

8.Bd2 — 10.8% (270 parties)

Ambassadeurs : Golcman, Evgeny (5x), Feustel, Bernd (2x), Hartoch, Robert G (2x), Parrella, Alfredo (2x), Urday, Henry (2x), Meister, Peter (2x), Ovezova, Mengli (2x), Zickus, Simonas (2x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	8.a3	8.Ne1	8.Rb1	8.Bd2
<1800	65	22%	15%	28%	11%
1800-2200	1054	29%	17%	19%	10%
2200-2600	1020	35%	26%	16%	10%
2600+	6	50%	17%	17%	—

Évolution par décennie (% des parties)

Décennie	N parties	8.a3	8.Ne1	8.Rb1	8.Bd2
1950s	6	67%	—	—	—
1960s	39	23%	31%	28%	15%
1970s	75	25%	24%	13%	27%
1980s	128	35%	23%	12%	11%
1990s	411	29%	23%	18%	11%
2000s	745	26%	20%	21%	10%
2010s	919	35%	19%	15%	11%
2020s	176	35%	21%	18%	6%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
8.a3	35%	35%	-0.0%
8.Ne1	19%	21%	▲ +2.2%
8.Rb1	15%	18%	▲ +2.9%
8.Bd2	11%	6%	▼ -5.1%

Joueurs célèbres

Champions du monde dans cette position

Botvinnik, Mikhail — 2 parties
Karpov, Aleksandr — 1 partie
Gukesh D — 1 partie

Parties historiques

8.a3 — 31.2% (779 parties)

1953 — Griffiths, Derek Francis Kenneth vs Lloyd, Kenneth William — 1-0 — Hastings ENG
1956 — Pirc, Vasja vs Averbach, Y. — 0-1 — Belgrade SRB
1957 — Holm, Sejer vs Petersen, Finn — 0-1 — Odense DEN
1958 — Smyslov, Dmitri vs Bobotsov — 1-0 — Munich ol
1960 — Peterson, Andrejs vs Osnos, Viatcheslav — 1/2-1/2 — Vilnius LTU

8.Ne1 — 20.5% (513 parties)

1961 — Nielsen, Axel vs Kolvig, Bent — 1/2-1/2 — Nykobing
1961 — Vatnikov, Josif E vs Furman, Semyon — 1-0 — Sochi RUS
1962 — Barcza, Gedeon vs Hecht, Hans-Joachim — 1-0 — Varna olm
1964 — Botvinnik, Mikhail vs Bobotsov, Milko G — 1/2-1/2 — Tel Aviv ISR
1964 — Botvinnik, Mikhail vs Bobotsov, Milko G — 1/2-1/2 — Tel Aviv olm

8.Rb1 — 17.5% (437 parties)

1961 — Savon, Vladimir vs Kholmov, Ratmir D — 1/2-1/2 — Novgorod RUS
1962 — Najdorf, Miguel vs Pachman, Ludek — 1/2-1/2 — Mar del Plata ARG
1962 — Tomson, Alexander vs Pedersen, Karl — 1-0 — Marianske Lazne
1963 — Besser, Hans vs Hecht, Hans-Joachim — 1/2-1/2 — Bad Pyrmont GER
1964 — Hort, Vlastimil vs Pelts, Roman — 1-0 — Krakow POL

8.Bd2 — 10.8% (270 parties)

1960 — Olexa, Vilem vs Fichtl, Jiri — 0-1 — Ostrava CZE
1963 — Dunkelblum, Arthur vs Ditt, Egon — 1-0 — Beverwijk NED
1966 — Vyzantiadis, Lazaros vs Bobotsov, Milko G — 0-1 — La Habana olm prel
1966 — Savon, Vladimir vs Kapengut, Albert — 1-0 — Moscow RUS
1968 — Ljungquist, Lennart vs Horberg, Bengt-Eric — 1-0 — Norrkoeping

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