Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	—	● d7→e6, f7→e6
Passés	—	—
Majorité	● aile dame 3v2	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● b5 (3v0)	—
Cases faibles	—	—
Centre	—	—

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● d	● c

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bf1	● Bf1 Non développé (mob. 0)
Bb4		● Bb4 Actif (mob. 7)
Bc8		● Bc8 Non développé (mob. 0)
Paire de fous	● Oui	● Oui
Clouages	● knight c3	—
Non développées	4 (● c1, ● f1, ● a1, ● h1)	4 (● b8, ● c8, ● 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	—	● …d7-d5

A32s — English: Symmetrical, Two Knights, 5.Nc3 Bb4 6.Qb3

1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Bb4 6.Qb3 * ● Trait aux Noirs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

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Plans. e3 (Libérer Bf1, préparer Bd3 — 25 % des parties) ; Bd2 (Fou actif (mobilité 5), Développer c1 — 17 % des parties) ; Nf3 (15 % des parties) ; Be3 (Fou actif (mobilité 5), Développer c1 — 11 % des parties) ; a3 (Préparer expansion aile dame — 11 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

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Plans. ...Bc5 (Fou actif (mobilité 7) — 48 % des parties) ; ...Na6 (Développer b8 — 32 % des parties) ; ...Bxc3+ (Fou actif (mobilité 6) — 12 % des parties) ; ...Qa5 (Contrôle diagonale a5-e1, Prépare O-O-O — 6 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Partie
1922 Bad Oeynhausen – Round 7 – Post, Erhard – 0-1 – Leonhardt, Fabrice – G17 1. d4 Nf6 2. Nf3 e6 3. c4 c5 4. Nc3 cxd4 5. Nxd4 Bb4 6. Qb3 Bc5 7. e3 Nc6 8. Nxc6 bxc6 9. Be2 Qc7 10. O-O h5
1922 Bad Pistyan – Round 6 – Bogoljubow, Efim – 1-0 – Przepiorka, Dawid – G42 1. d4 Nf6 2. Nf3 e6 3. c4 c5 4. Nc3 cxd4 5. Nxd4 Bb4 6. Qb3 Na6 7. Bd2 b6 8. e3 Bb7 9. Be2 O-O 10. O-O Be7
1926 Scarborough-A – Round 6 – Landau, Salo – 1-0 – Reid, Graeme C – G9 1. c4 c5 2. Nc3 Nf6 3. Nf3 e6 4. d4 cxd4 5. Nxd4 Bb4 6. Qb3 Qa5 7. Bd2 Ng4 8. a3 Bxc3 9. Bxc3 Qc5 10. e3 Nf6
1926 Semmering Panhans – Round 10 – Tarrasch, Siegbert – 1/2-1/2 – Spielmann, Rudolf – G10 1. c4 Nf6 2. Nf3 e6 3. d4 c5 4. Nc3 cxd4 5. Nxd4 Bb4 6. Qb3 Bc5 7. Be3 Na6 8. h3 O-O 9. g3 d5 10. cxd5 Nxd5
1927 Kecskemet f II – Round 5 – Colle, Edgar – 0-1 – Yates, Frederic D – G8 1. d4 e6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4 6. Qb3 Na6 7. a3 Ba5 8. Qc2 d5 9. b4 dxc4 10. Ndb5 Bb6
1929 Karlsbad – Round 1 – Menchik, Vera Frantsevna – 0-1 – Spielmann, Rudolf – G169 1. Nf3 Nf6 2. c4 c5 3. d4 e6 4. Nc3 cxd4 5. Nxd4 Bb4 6. Qb3 Bc5 7. Nf3 Nc6 8. e3 O-O 9. Be2 d5 10. O-O Na5
1930 San Remo – Round 1 – Monticelli, Mario – 0-1 – Spielmann, Rudolf – G64 1. d4 Nf6 2. Nf3 e6 3. c4 c5 4. Nc3 cxd4 5. Nxd4 Bb4 6. Qb3 Bc5 7. Be3 b6 8. f3 Qe7 9. g3 Nc6 10. Rd1 O-O
1934 Maribor – Round 8 – Vidmar, Milan Jr – 1/2-1/2 – Spielmann, Rudolf – G31 1. d4 Nf6 2. Nf3 c5 3. c4 e6 4. Nc3 cxd4 5. Nxd4 Bb4 6. Qb3 Bc5 7. Nf3 Nc6 8. Bg5 h6 9. Bxf6 Qxf6 10. Ne4 Qe7
1953 Candidats Tournament – Round 29 – Boleslavsky, Isaac – 0-1 – Szabo, Laszlo – G189 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. Nc3 cxd4 5. Nxd4 Bb4 6. Qb3 Na6 7. e3 Ne4 8. Be2 Qa5 9. O-O Nac5 10. Qc2 Bxc3
1954 CSR Ch sf – Round 5 – Marsalek, Josef – 0-1 – Brat, Vaclav Dr – G18 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. Nc3 cxd4 5. Nxd4 Bb4 6. Qb3 Bc5 7. e3 O-O 8. Be2 Nc6 9. Nxc6 dxc6 10. O-O e5
1955 Argentina – Round 14 – Alcaraz Suarez, Juan Camilo – 0-1 – Maderna, Carlos – G101 1. d4 Nf6 2. Nf3 c5 3. c4 cxd4 4. Nxd4 e6 5. Nc3 Bb4 6. Qb3 Bxc3+ 7. Qxc3 d5 8. cxd5 Nxd5 9. Qa3 Qb6 10. e4 Qxd4
1956 CSR Ch sf – Round 1 – Zita, Frantisek – 1/2-1/2 – Seifert, Bedrich – G1 1. c4 c5 2. Nf3 Nf6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 Bb4 6. Qb3 Bc5 7. e3 Nc6 8. Nf3 O-O 9. Be2 d5 10. cxd5 Nxd5
1958 Asztalos Memorial – Round 7 – Forintos, Gyozo V – 0-1 – Bilek, Istvan – G18 1. d4 Nf6 2. c4 c5 3. Nf3 e6 4. Nc3 cxd4 5. Nxd4 Bb4 6. Qb3 Na6 7. Nc2 Be7 8. Nb5 O-O 9. Bg5 d5 10. cxd5 Nxd5
1960 Budapest zt – Round 9 – Prameshuber, Alexander – 1/2-1/2 – Kozma, Julius – G50 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. Nc3 cxd4 5. Nxd4 Bb4 6. Qb3 Bc5 7. Nf3 O-O 8. Bg5 Be7 9. e3 b6 10. Be2 Bb7
1961 Oberhausen etc – Round 8 – Ujtelky, Maximilian – 0-1 – Polugaevsky, Lev – G196 1. c4 Nf6 2. Nc3 e6 3. d4 c5 4. Nf3 cxd4 5. Nxd4 Bb4 6. Qb3 Bc5 7. e3 Nc6 8. Nxc6 bxc6 9. Be2 O-O 10. O-O d5
1962 Spartak Ch – Round 10 – Kirillov, Vladimir – 1-0 – Kondratiev, Pavel E – G75 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. Nc3 cxd4 5. Nxd4 Bb4 6. Qb3 Bc5 7. Be3 Qe7 8. Nc2 b6 9. Bxc5 bxc5 10. g3 Nc6
1966 URS Team Ch – Round ? – Yudovich, Mikhail M – 1-0 – Shamkovich, Leonid – G14 1. d4 Nf6 2. Nf3 c5 3. c4 cxd4 4. Nxd4 e6 5. Nc3 Bb4 6. Qb3 Bc5 7. e3 Nc6 8. Nxc6 bxc6 9. Be2 d5 10. O-O O-O
1969 Steinheim ch OWL – Round 4 – Gudath, Reiner – 1/2-1/2 – Groenegress, Wilfried – G4 1. c4 e6 2. Nc3 Nf6 3. Nf3 c5 4. d4 cxd4 5. Nxd4 Bb4 6. Qb3 Na6 7. Bg5 Qa5 8. Bxf6 Bxc3+ 9. bxc3 gxf6 10. Nb5 O-O
1972 Skopje ol (Men) fin-A – Round 2 – Pomar Salamanca, Arturo – 1-0 – Jansson, Borje – G132 1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 e6 5. Nc3 Bb4 6. Qb3 Na6 7. Bd2 O-O 8. e3 b6 9. Be2 Bb7 10. O-O Be7
World Blitz 2015 – Round 7.67 – Vidit, Santosh Gujrathi – 0-1 – Antipov, Mikhail Al. – G455 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. Nc3 cxd4 5. Nxd4 Bb4 6. Qb3 Qa5 7. Bd2 Nc6 8. Nc2 O-O 9. Nxb4 Qxb4 10. Qxb4 Nxb4

A32s — Symmetrical, Two Knights (1922)

1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Bb4 6.Qb3

Les coups candidats

6…Bc5 — 48.6% (119 parties)

Ambassadeurs : Ljubojevic, Ljubomir (2x), Seredenko, Vladimir (2x), Agzamov, Georgy (2x), Ujtelky, Maximilián Samuel Rudolf (1x), Polugaevsky, Lev (1x), Al Husari, Zita Fatima (1x), Seifert, Bedrich (1x), Sarosy, Zoltan L (1x)

6…Na6 — 27.8% (68 parties)

Ambassadeurs : Pomar Salamanca, Arturo (2x), De La Rocha Prieto, Ramon (2x), Izeta Txabarri, Felix (2x), Forintos, Gyozo V (1x), Bak, Istvan (1x), Willaert, Robert (1x), Prins, Lodewijk (1x), Bhatt, Mantra (1x)

6…Bxc3+ — 8.6% (21 parties)

Ambassadeurs : Enevoldsen, Harald (1x), Pedersen, Eigil (1x), Norcia, Fabrizio (1x), Cassidy, Bernard (1x), Paulus, Joseph (1x), Boutteville, Cesar (1x), Suarez Castro Aidan Fernando (1x), Maderna, Carlos (1x)

6…Qa5 — 5.7% (14 parties)

Ambassadeurs : Kwapisz, Stanislaw (1x), Gromek, Jozef (1x), Ingelmo Iglesias, Agustin (1x), Buxade Roca, Guillermo (1x), Nobrega, Adaucto Wanderley (1x), Solis, Velazquez Gael (1x), Wiekert, Martin (1x), Eperjesi, Laszlo Dr. (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	6…Bc5	6…Na6	6…Bxc3+	6…Qa5
<1800	9	44%	—	11%	22%
1800-2200	83	48%	19%	8%	6%
2200-2600	110	52%	35%	5%	4%
2600+	4	50%	25%	—	25%

Évolution par décennie (% des parties)

Décennie	N parties	6…Bc5	6…Na6	6…Bxc3+	6…Qa5
1950s	10	20%	30%	30%	20%
1960s	9	56%	22%	22%	—
1970s	19	53%	32%	11%	5%
1980s	21	52%	33%	5%	5%
1990s	49	39%	37%	10%	4%
2000s	61	44%	28%	10%	3%
2010s	63	60%	19%	—	10%
2020s	13	54%	23%	15%	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
6…Bc5	60%	54%	▼ -6.5%
6…Na6	19%	23%	▲ +4.0%
6…Bxc3+	0%	15%	▲ +15.4%
6…Qa5	10%	0%	▼ -9.5%

Parties historiques

6…Bc5 — 48.6% (119 parties)

1954 — Afizov, Marsel vs Brat, Vaclav Dr — 0-1 — Jablonec nad Nisou
1956 — Al Husari, Zita Fatima vs Seifert, Bedrich — 1/2-1/2 — Chomutov
1960 — Prameshuber, Alexander vs Kozma, Julius — 1/2-1/2 — Budapest HUN
1961 — Ujtelky, Maximilián Samuel Rudolf vs Polugaevsky, Lev — 0-1 — Oberhausen etc
1962 — Kirillov, Vladimir vs Efimov, Kondrat — 1-0 — Minsk BLR

6…Na6 — 27.8% (68 parties)

1953 — Boleslavsky, Isaac vs Szabo, Laszlo — 0-1 — Zurich SUI
1955 — Willaert, Robert vs Prins, Lodewijk — 0-1 — Mont Pelerin sur Vevey
1958 — Forintos, Gyozo V vs Bak, Istvan — 0-1 — Asztalos Mem
1965 — Bhatt, Mantra vs Myers, Hugh — 1/2-1/2 — Illinois Open
1969 — Gudath, Reiner vs Groenegress, Wilfried — 1/2-1/2 — Steinheim ch OWL

6…Bxc3+ — 8.6% (21 parties)

1951 — Enevoldsen, Harald vs Pedersen, Eigil — 1/2-1/2 — Odense DEN
1954 — Paulus, Joseph vs Boutteville, Cesar — 0-1 — Marseille FRA
1955 — Suarez Castro Aidan Fernando vs Maderna, Carlos — 0-1 — Argentina
1966 — Norcia, Fabrizio vs Cassidy, Bernard — 1-0 — Havana ol
1967 — Campomanes, Florencio vs Rodriguez, Ruben — 0-1 — Manila PHI

6…Qa5 — 5.7% (14 parties)

1958 — Ingelmo Iglesias, Agustin vs Buxade Roca, Guillermo — 1/2-1/2 — Catalunya
1959 — Kwapisz, Stanislaw vs Gromek, Jozef — 0-1 — Lodz POL
1974 — Nobrega, Adaucto Wanderley vs Solis, Velazquez Gael — 1-0 — Nice FRA
1989 — Wiekert, Martin vs Eperjesi, Laszlo Dr. — 0-1 — Dortmund op Dortmund GER
1990 — Theulings, Paul-Peter vs Duijn, Richard — 1/2-1/2 — Enschede NED

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