Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	—	—
Passés	—	—
Majorité	—	—

Cases

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

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bf1	● Bf1 Non développé (mob. 0)
Bc8		● Bc8 Non développé (mob. 0)
Bf8		● Bf8 Non développé (mob. 0)
Paire de fous	● Oui	● Oui
Non développées	5 (● g1, ● c1, ● f1, ● a1, ● h1)	6 (● b8, ● g8, ● c8, ● f8, ● a8, ● h8)

Sécurité du roi

	♔ Blancs	♚ Noirs
Statut	● Au centre	● Au centre
Droits de roque	O-O / O-O-O	O-O / O-O-O

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	mobile
Ruptures	● d2-d4	● …d7-d5

A34a — English: Symmetrical

1.c4 c5 2.Nc3 * ● Trait aux Noirs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plans. g3 (Préparer le fianchetto — 60 % des parties) ; Nf3 (Développer g1 — 32 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plans. ...Nc6 (Développer b8 — 49 % des parties) ; ...Nf6 (Développer g8 — 26 % des parties) ; ...g6 (Préparer le fianchetto — 18 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

├── A34d - 2…Nf6 - Symmetrical (1928) [+0.24] · 565 parties

│ ├── A34i - 3.Nf3 - English Opening: Symmetrical Variation, Three Knights Variation [+0.26] · 335 parties

│ │ ├── A34n - 3…d5 - Symmetrical, 3 Knights (1927) [+0.20] · 285 parties

│ │ │ ├── A34q - 4.cxd5 Nxd5 - Exchange (1927) [+0.31] · 283 parties

│ │ │ │ ├── A34s - 5.g3 - Symmetrical, 3 Knights (1925) [+0.10] · 97 parties

│ │ │ │ ├── A34q - 5.* - Symmetrical, 3 Knights, Exchange · 81 parties

│ │ │ │ ├── A34t - 5.e4 - Symmetrical, 3 Knights (1937) [+0.24] · 65 parties

│ │ │ │ │ ├── A34w - 5…Nb4 - Symmetrical, 3 Knights (1928) [+0.26] · 50 parties

│ │ │ │ │ │ ├── A34a - 6.Bc4 - Symmetrical, 3 Knights (1926) [+0.22] · 35 parties

│ │ │ │ │ │ ├── A34b - 6.Bb5+ - Symmetrical, 3 Knights (1975) [+0.19] · 13 parties

│ │ │ │ │ │ └── A34w - 6.* - Symmetrical, 3 Knights · 2 parties

│ │ │ │ │ ├── A34x - 5…Nxc3 - Symmetrical, 3 Knights (1933) [+0.60] · 10 parties

│ │ │ │ │ │ ├── A34a - 6.dxc3 Qxd1+ 7.Kxd1 - Queenswap (1931) [+0.25] · 5 parties

│ │ │ │ │ │ └── A34x - 6.* - Symmetrical, 3 Knights · 5 parties

│ │ │ │ │ └── A34t - 5…* - Symmetrical, 3 Knights · 5 parties

│ │ │ │ └── A34u - 5.d4 - Symmetrical, 3 Knights (1953) [+0.29] · 40 parties

│ │ │ │ ├── A34z - 5…Nxc3 - Symmetrical, 3 Knights (1926) [+0.27] · 31 parties

│ │ │ │ ├── A34y - 5…cxd4 - Symmetrical, 3 Knights (1925) [+0.49] · 8 parties

│ │ │ │ └── A34u - 5…* - Symmetrical, 3 Knights · 1 partie

│ │ │ └── A34n - 4.* - Symmetrical, 3 Knights · 2 parties

│ │ ├── A34p - 3…e6 4.g3 - Symmetrical, 3 Knights (1947) [+0.25] · 25 parties

│ │ ├── A34l - 3…b6 - Symmetrical, 3 Knights (1929) [+0.47] · 16 parties

│ │ └── A34m - 3…g6 - Symmetrical, 3 Knights (1923) [+0.52] · 9 parties

│ ├── A34h - 3.g3 - Symmetrical (1925) [+0.17] · 207 parties

│ │ ├── A34j - 3…d5 - Symmetrical (1956) [+0.26] · 128 parties

│ │ │ ├── A34r - 4.cxd5 Nxd5 5.Bg2 - Symmetrical (1932) [+0.14] · 126 parties

│ │ │ │ ├── A34v - 5…Nc7 - Rubinstein System (1947) [+0.12] · 111 parties

│ │ │ │ └── A34r - 5…* - Symmetrical · 15 parties

│ │ │ └── A34j - 4.* - Symmetrical · 2 parties

│ │ └── A34h - 3…* - Symmetrical · 79 parties

│ └── A34d - 3.* - Symmetrical · 23 parties

├── A34c - 2…g6 - Symmetrical (1905) [+0.25] · 85 parties

│ ├── A34g - 3.Nf3 - Symmetrical (1961) [+0.25] · 48 parties

│ ├── A34c - 3.* - Symmetrical · 20 parties

│ └── A34e - 3.g3 - Symmetrical [+0.24] · 17 parties

│ └── A34o - 3…Bg7 4.Bg2 - Symmetrical (1914) [+0.22] · 17 parties

└── A34b - 2…b6 - Symmetrical [+0.45] · 5 parties

└── A34f - 3.Nf3 - Symmetrical [+0.47] · 5 parties

└── A34k - 3…Bb7 - Symmetrical (1935) [+0.52] · 5 parties

Les parties, variante par variante

1565 partiesA34d - 2…Nf6 - Symmetrical (1928)

285 partiesA34c - 2…g6 - Symmetrical (1905)

35 partiesA34b - 2…b6 - Symmetrical

A34a — Symmetrical Variation, Normal Variation (1965)

1.c4 c5 2.Nc3

Les coups candidats

2…Nc6 — 55.7% (19689 parties) →

Ambassadeurs : Miezis, Normunds (125x), ? (45x), Kolanek, Roman (34x), Vetter, Udo (32x), Weyerstrass, Ronald (31x), Bukal, Vladimir Jr. (26x), Beck, Georges (26x), Forintos, Gyozo V (24x)

2…Nf6 — 21.9% (7739 parties) →

Ambassadeurs : Vetter, Udo (21x), Womacka, Mathias (20x), Beck, Georges (20x), Ruckschloss, Karol (20x), Bukal, Vladimir Jr. (16x), Portisch, Lajos (13x), Korchnoi, Viktor (11x), Magem Badals, Jordi (11x)

2…g6 — 14.1% (4990 parties) →

Ambassadeurs : Miezis, Normunds (42x), Bobotsov, Milko G (20x), Gheorghiu, Florin (18x), Forintos, Gyozo V (16x), Matulovic, Milan (13x), Hort, Vlastimil (11x), Adorjan, Andras (10x), Sikora-Lerch, Jan (10x)

2…b6 — 3.6% (1287 parties) →

Ambassadeurs : Tochtermann, Georg, Dr. (11x), Heinbuch, Detlef Ulrich (10x), Miezis, Normunds (9x), Kovacevic, Slobodan (8x), Gurevich, Dmitry (7x), Krallmann, Matthias (6x), Claesen, Pieter (6x), Rajkovic, Dusan (5x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	2…Nc6	2…Nf6	2…g6	2…b6
<1800	3406	58%	21%	9%	3%
1800-2200	15023	58%	22%	12%	4%
2200-2600	9628	51%	21%	21%	5%
2600+	201	42%	14%	42%	0%

Évolution par décennie (% des parties)

Décennie	N parties	2…Nc6	2…Nf6	2…g6	2…b6
1950s	188	43%	43%	11%	—
1960s	655	53%	17%	30%	—
1970s	969	48%	18%	28%	3%
1980s	1910	45%	30%	17%	5%
1990s	6744	54%	24%	12%	4%
2000s	10360	56%	23%	11%	5%
2010s	11053	58%	20%	14%	3%
2020s	3495	59%	18%	18%	2%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
2…Nc6	58%	59%	▲ +0.6%
2…Nf6	20%	18%	▼ -1.9%
2…g6	14%	18%	▲ +4.4%
2…b6	3%	2%	▼ -1.8%

Joueurs célèbres

Champions du monde dans cette position

Botvinnik, Mikhail — 10 parties
Karpov, Anatoly — 10 parties
Tal, Mikhail — 10 parties
Anand, Viswanathan — 8 parties
Kramnik, Vladimir — 6 parties
Hou, Yifan — 5 parties
Carlsen, Magnus — 3 parties
Gukesh D — 3 parties
Kasparov, Garry — 2 parties
Ju, Wenjun — 2 parties

Parties historiques

2…Nc6 — 55.7% (19689 parties)

1951 — Smyslov, Vasily vs Simagin, Vladimir — 1-0 — Moskou ch-URS
1952 — Heinicke, Herbert vs Ehrat, Jules — 1-0 — Lucerne SUI
1953 — Filip, Miroslav vs Sajtar, Jaroslav — 1-0 — Teplitz-Schoenau GER
1953 — Sarosy, Zoltan L vs Watson, FW. — 1-0 — Toronto CAN
1954 — Anay Barche vs Kremer, Paul — 1-0 — Amsterdam olm

2…Nf6 — 21.9% (7739 parties)

1950 — Nuesken, Fritz vs Pietzsch, Wolfgang — 0-1 — Soemmerda GER
1950 — Larsen, Ingrid vs Keller-Hermann, Edith — 0-1 — Moscow RUS
1951 — Niephaus, Walter vs Teschner, Rudolf — 1-0 — Augsburg GER
1952 — Thibaut, Georges vs O'Kelly de Galway, Alberic — 1/2-1/2 — Ghent
1952 — Chaude de Silans, Chantal vs Thiellement, Andre — 1/2-1/2 — Charleville Mezieres

2…g6 — 14.1% (4990 parties)

1951 — Sarosy, Zoltan L vs Suk, Ivan — 1-0 — Toronto CAN
1955 — Ufimtsev, Anatoly vs Tscherbakov — 1-0 — USSR
1955 — Kotov, Alexander vs Korchnoi, Viktor — 1-0 — Moskou ch-URS
1956 — Koblencs, Alexander vs Korchnoi, Viktor — 1/2-1/2 — Tbilisi GEO
1956 — Pachman, Ludek vs Botvinnik, Mikhail — 1/2-1/2 — Moscow RUS

2…b6 — 3.6% (1287 parties)

1973 — Pomar Salamanca, Arturo vs Ljubojevic, Ljubomir — 0-1 — Madrid ESP
1974 — Lipnowski, Irwin vs Sanguinetti, Raul — 0-1 — Winnipeg CAN
1975 — Crouch, Colin S vs Krygelmans, Johan — 0-1 — Eeklo
1975 — Rantanen, Yrjo A. vs Jans, Koen — 0-1 — Hindas
1976 — Cramling, Pia vs Petursson, Margeir — 1-0 — Wattignies wch-jr