Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	● c4, ● c7
Pions isolés	—	—
Arriérés	—	—
Chaînes	—	—
Passés	—	—
Majorité	—	● aile dame 4v2

Cases

	♔ Blancs	♚ Noirs
Cases fortes	—	—
Cases faibles	—	—
Centre	● e5 (1v0)	● d5 (1v0)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● c	● d

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bf1	● Bf1 Non développé (mob. 0)
Bc8		● Bc8 Non développé (mob. 5)
Bf8		● Bf8 Non développé (mob. 0)
Paire de fous	● Oui	● Oui
Non développées	5 (● b1, ● 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-d3	● …c4-c3

A09n — Reti: Accepted, 3.Qa4+

1.Nf3 d5 2.c4 dxc4 3.Qa4+ * ● Trait aux Noirs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

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Plans. Qxc4 (Centraliser la dame — 69 % des parties) ; g3 (Préparer le fianchetto — 17 % des parties) ; Ne5 (Cavalier centralisé en e5 — 6 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

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Plans. ...Nc6 (Développer b8 — 34 % des parties) ; ...Nd7 (Développer b8 — 32 % des parties) ; ...c6 (Renforcer le centre — 19 % des parties) ; ...Bd7 (Fou actif (mobilité 8), Développer c8 — 12 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Partie
1926 DSV Kongress – Round 11 – Lokvenc, Josef – 1-0 – Leonhardt, Paul – G43 1. Nf3 d5 2. c4 dxc4 3. Qa4+ Nd7 4. g3 c6 5. Qxc4 g6 6. Bg2 Bg7 7. O-O Nh6 8. d3 O-O 9. Nc3 Nf5 10. Rb1 Nb6
1936 Philadelphia ch-ACF – Round 2 – Kupchik, Abraham – 1/2-1/2 – Hanauer, Milton Loeb – G1 1. Nf3 d5 2. c4 dxc4 3. Qa4+ Nc6 4. e4 Nf6 5. Nc3 Nd7 6. Qxc4 e5 7. a3 Nb6 8. Qd3 Bd6 9. Qc2 O-O 10. Be2 Bg4
1947 Nt Lueneburg GER – Round 7 – Heinicke, Herbert – 1/2-1/2 – Rankis, August – G20 1. Nf3 d5 2. c4 dxc4 3. Qa4+ Nd7 4. Nc3 Nf6 5. g3 c6 6. Qxc4 e5 7. Bg2 Nb6 8. Qb3 Be6 9. Qc2 Bd6 10. O-O Qd7
1952 OWL Ch – Round 4 – Hantke Rolf – 0-1 – Werner, Stephan – G12 1. Nf3 d5 2. c4 dxc4 3. Qa4+ Bd7 4. Qxc4 Nc6 5. d4 e6 6. e4 Nf6 7. Nc3 Na5 8. Qd3 c5 9. Bg5 Qb6 10. d5 c4
1952 OWL Ch – Round 7 – Hantke Rolf – 0-1 – Hellwig, Hannah M – G22 1. Nf3 d5 2. c4 dxc4 3. Qa4+ Qd7 4. Qxc4 Qc6 5. Qb3 Qxc1+ 6. Qd1 Qxd1+ 7. Kxd1 Nc6 8. Nc3 Bd7 9. d4 e6 10. e4 Bb4
1957 URS Ch, semi final – Round 16 – Reshko, Aron – 0-1 – Sakharov, Yuri G. – G150 1. Nf3 d5 2. c4 dxc4 3. Qa4+ Nc6 4. g3 a6 5. Qxc4 e5 6. Nc3 Bd6 7. Bg2 Nge7 8. d4 exd4 9. Nxd4 Ne5 10. Qa4+ Qd7
1963 Leningrad ch-URS – Round 1 – Polugaevsky, Lev – 1/2-1/2 – Novopashin, Arkady – G128 1. Nf3 d5 2. c4 dxc4 3. Qa4+ Nd7 4. g3 Nf6 5. Bg2 g6 6. Qxc4 Bg7 7. d4 Nb6 8. Qb3 Be6 9. Qd1 Qc8 10. O-O Bh3
1963 URS Ch sf – Round ? – Polugaevsky, Lev – 1-0 – Novopashin, Arkady – G16 1. Nf3 d5 2. c4 dxc4 3. Qa4+ c6 4. Qxc4 Nf6 5. g3 g6 6. Bg2 Bg7 7. O-O O-O 8. d3 h6 9. Nc3 Qa5 10. Bd2 Qh5
1969 Team match FRG-CSR – Round 2 – Janata, Michael – 1-0 – Lehmann, Klaus – G15 1. Nf3 d5 2. c4 dxc4 3. Qa4+ Nc6 4. Nc3 Nf6 5. g3 Nd5 6. Qxc4 Nb6 7. Qb3 g6 8. Bg2 Bg7 9. O-O O-O 10. d3 a5
World Blitz 2017 – Round 8.19 – Artemiev, Vladislav – 1-0 – Vallejo Pons, Francisco – G399 1. Nf3 d5 2. c4 dxc4 3. Qa4+ Nc6 4. Qxc4 e5 5. d3 h6 6. g3 Be6 7. Qa4 Qd7 8. Be3 Nf6 9. Nc3 Nd5 10. Nxd5 Bxd5

A09n — Reti: Accepted (1926)

1.Nf3 d5 2.c4 dxc4 3.Qa4+

Les coups candidats

3…Nc6 — 33.9% (222 parties)

Ambassadeurs : Dlugy, Maxim (4x), Graf, Rena (3x), Janata, Michael (2x), Moody, David W (2x), Petrosian, Karen (2x), Ganguly, Surya Shekhar (2x), Trisic, Dragan (2x), Ivanov, Jordan (2x)

3…Nd7 — 31.8% (208 parties)

Ambassadeurs : Yakovich, Yuri (5x), Sorokin, Maxim (3x), Cimolai, Jean (2x), Radulov, Ivan (2x), Neckar, Lubomir (2x), Blatny, Pavel (2x), Rublevsky, Sergei (2x), Shcherbakov, Ruslan (2x)

3…c6 — 18.6% (122 parties)

Ambassadeurs : Garcia Palermo, Carlos Horacio (4x), Adamski, Jan (3x), Fioramonti, Hung (2x), Garcia Martinez, Silvino (2x), Berebora, Ferenc (2x), Rocha, Samuel Batista (2x), Polugaevsky, Lev (1x), Novopashin, Arkady (1x)

3…Bd7 — 12.1% (79 parties)

Ambassadeurs : Hantke, Rolf (2x), Botur, Michal (2x), Adamski, Jan (2x), Eswaran, Ashritha (2x), Lachmann, Hans G (1x), Del Vecchio, Alain (1x), Casciano, Leonardo (1x), Werner, Stephan (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	3…Nc6	3…Nd7	3…c6	3…Bd7
<1800	58	47%	10%	12%	28%
1800-2200	213	33%	25%	23%	15%
2200-2600	286	31%	42%	21%	2%
2600+	5	60%	40%	—	—

Évolution par décennie (% des parties)

Décennie	N parties	3…Nc6	3…Nd7	3…c6	3…Bd7
1950s	10	20%	30%	10%	30%
1960s	6	50%	33%	17%	—
1970s	10	10%	50%	30%	—
1980s	40	40%	35%	10%	10%
1990s	134	29%	43%	18%	8%
2000s	207	37%	28%	17%	15%
2010s	209	33%	28%	23%	11%
2020s	39	41%	28%	10%	13%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
3…Nc6	33%	41%	▲ +8.0%
3…Nd7	28%	28%	-0.0%
3…c6	23%	10%	▼ -13.2%
3…Bd7	11%	13%	▲ +1.3%

Parties historiques

3…Nc6 — 33.9% (222 parties)

1952 — Stevenson, Reginald William vs Blow, Ronald — 0-1 — Southsea
1957 — Reshko, Aron vs Sakharov, Yuri N — 0-1 — Kiev UKR
1969 — Janata, Michael vs Lehmann, Heinz — 1-0 — GER
1969 — Janata, Michael vs Lehmann, Klaus — 1-0 — Bad Godesberg GER
1969 — Fricker, Jean vs Savalle, Andre — 1/2-1/2 — Pau

3…Nd7 — 31.8% (208 parties)

1951 — Werner, Stephan vs Lachmann, Hans G — 0-1 — Minden
1955 — Stoklosa, Jakub vs Kwapisz, Stanislaw — 1/2-1/2 — Poland ch13
1956 — Sidlo, Oldrich vs Betak Miroslav — 1/2-1/2 — Podebrady CZE
1963 — Polugaevsky, Lev vs Novopashin, Arkady — 1/2-1/2 — Leningrad ch-URS
1968 — Brostrom, Goran vs Myagmarsuren, Lkhamsuren — 0-1 — Lugano olm

3…c6 — 18.6% (122 parties)

1954 — Lombardy, William J vs Fischeimer, D. — 1-0 — New Orleans, LA USA
1963 — Polugaevsky, Lev vs Novopashin, Arkady — 1-0 — Moscow RUS
1971 — Vandezande, Albert vs De Hert, Robert — 1/2-1/2 — Bredene
1975 — Szymczak, Zbigniew vs Lechtynsky, Jiri — 1/2-1/2 — Lublin POL
1975 — Adamski, Jan vs Garcia Martinez, Silvino — 1/2-1/2 — Polanica Zdroj POL

3…Bd7 — 12.1% (79 parties)

1951 — Lachmann, Hans G vs Hantke, Rolf — 1/2-1/2 — Minden
1951 — Del Vecchio, Alain vs Casciano, Leonardo — 1-0 — corr Italy
1952 — Hantke, Rolf vs Werner, Stephan — 0-1 — Guetersloh
1985 — De Coverly, Roger D vs Parker, Glen D — 1-0 — BE Swiss
1986 — Inkiov, Ventzislav vs Adamski, Jan — 1/2-1/2 — Tbilisi GEO