A27c — English: Three Knights, 3…f5

1.c4 e5 2.Nc3 Nc6 3.Nf3 f5 * ○ Trait aux Blancs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Avantages : case forte b5, case forte d5, paire de fous.
Faiblesses adverses : Bc8 enfermé, Bf8 enfermé, roi noir au centre.
Problèmes : roi au centre, Bc1 enfermé, Bf1 enfermé, 4 pièces non développées (C1, F1, A1, H1).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● e4 — Centre d4+e4, libère Bf1
● d3 — Libérer Bc1
● h3 — Empêcher ...Bg4

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Avantages : case forte b4, case forte d4, paire de fous.
Faiblesses adverses : Bc1 enfermé, Bf1 enfermé, roi blanc au centre.
Problèmes : roi au centre, Bc8 enfermé, Bf8 enfermé, 5 pièces non développées (G8, C8, F8, A8, H8).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● ...d6 — Libérer Bc8
● ...Nf6 — Développer Ng8
● ...Be7 — Développer Bf8
● ...Bg4 — Clouer Nf3

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

A27c — Three Knights

1.c4 e5 2.Nc3 Nc6 3.Nf3 f5

Eval: [+0.50]

Les coups candidats

4.d4 — 63.1% (1991 parties) →

Ambassadeurs : Cafferty, Bernard (12x), Vetter, Udo (11x), Uhlmann, Wolfgang (10x), Liebert, Heinz (10x), Pech, Jaroslav Jr (9x), Kupreichik, Viktor D (8x), Feistenauer, Fred (8x), Ikonnikov, Vyacheslav (7x)

4.d3 — 21.5% (678 parties)

Ambassadeurs : Moody, David W (6x), Costello, Colin A (6x), Landenbergue, Claude (5x), Stoer, Andreas (4x), Lamford, Paul (3x), Regan, Neil (3x), Sammalvuo, Tapani (3x), Ikonnikov, Vyacheslav (3x)

4.g3 — 8.7% (273 parties)

Ambassadeurs : Adorjan, Andras (4x), Gulko, Boris (4x), Ghaem Maghami, Ehsan (4x), Gleizerov, Evgeny (4x), McNab, Colin A (3x), Zielinski, Sergej (3x), Zhukova, Natalia (3x), Behling, Robert (3x)

4.e4 — 3.5% (109 parties)

Ambassadeurs : Cueto Aller, Jose Julio (3x), Umarbekov, Aziz (3x), Laco, Giuseppe (3x), Lantos, Attila (2x), Pech, Jaroslav Jr (2x), Rey Alvarez, Jacobo (2x), Paiva, Omar (1x), German, Eugenio (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	4.d4	4.d3	4.g3	4.e4
<1800	95	45%	37%	4%	9%
1800-2200	1099	56%	28%	8%	5%
2200-2600	1187	71%	14%	12%	1%
2600+	43	44%	16%	35%	2%

Évolution par décennie (% des parties)

Décennie	N parties	4.d4	4.d3	4.g3	4.e4
1910s	1	—	100%	—	—
1920s	3	33%	33%	—	—
1930s	27	78%	7%	—	—
1940s	17	53%	12%	—	—
1950s	13	85%	—	—	8%
1960s	46	87%	9%	—	—
1970s	143	85%	10%	—	1%
1980s	265	74%	17%	2%	3%
1990s	686	73%	19%	2%	3%
2000s	779	60%	27%	6%	5%
2010s	881	55%	26%	12%	4%
2020s	293	47%	11%	34%	2%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
4.d4	55%	47%	▼ -7.2%
4.d3	26%	11%	▼ -15.0%
4.g3	12%	34%	▲ +21.8%
4.e4	4%	2%	▼ -2.2%

Joueurs célèbres

Champions du monde dans cette position

Smyslov, Vladimir — 3 parties
Karpov, Anatoly — 2 parties
Carlsen, Magnus — 2 parties
Lasker, Emanuel — 1 partie
Kramnik, Vladimir — 1 partie

Parties historiques

4.d4 — 63.1% (1991 parties)

1928 — Kevitz, Alexander vs Lasker, Emanuel — 1-0 — New York, NY USA
1930 — Carls, Carl vs Soler Bordas, Placido — 1/2-1/2 — Hamburg GER
1931 — Wiesel, Laszlo vs Szekely, Jeno — 1-0 — Budapest HUN
1931 — Steiner, Endre vs Szekely, Jeno — 1-0 — Budapest HUN
1934 — Fine, Reuben vs Steiner, Herman — 1-0 — Mexico City MEX

4.d3 — 21.5% (678 parties)

1913 — Staffer, John Homer vs Jaffe, Charles — 0-1 — New York, NY USA
1927 — Babel August vs Pitschak, Rudolf — 1-0 — Magdeburg GER
1931 — Mazel, Isaak Y vs Goglidze, Viktor — 1/2-1/2 — Moskou ch-URS
1931 — Kasparian, Genrikh vs Goglidze, Viktor — 0-1 — Moskou ch-URS
1946 — Alvarez Martin, Pedro vs Wexler, Bernardo — 1-0 — Buenos Aires ARG

4.g3 — 8.7% (273 parties)

1982 — Eid, John vs Moody, David W — 0-1 — ?
1983 — Adorjan, Andras vs Ljubojevic, Ljubomir — 1/2-1/2 — Surakarta/Denpasar INA
1983 — Adorjan, Andras vs Kurajica, Bojan — 1/2-1/2 — Plovdiv BUL
1984 — Adorjan, Andras vs Nikolic, Predrag — 1/2-1/2 — Wijk aan Zee NED
1984 — Adorjan, Andras vs Kurajica, Bojan — 1-0 — Reggio Emilia ITA

4.e4 — 3.5% (109 parties)

1952 — Paiva, Omar vs German, Eugenio — 0-1 — Sao Paulo ch BRA
1978 — Saari, Antti vs Tyrkko, Timo — 1-0 — ?
1983 — Junginger, Max vs Steiner, Bruno — 0-1 — Zurich SUI
1984 — Danilov, Alex vs Veltmann, Martin — 0-1 — Ottawa CAN
1985 — Stoppel, Franz vs Petschar, Kurt — 1/2-1/2 — Austria

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

Cases

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

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. 5)
Paire de fous	● Oui	● Oui
Non développées	4 (c1, f1, a1, h1)	5 (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	semi-ouvert
Ruptures	● c4-c5, ● d2-d3, ● e2-e3	● …d7-d6, ● …d7-d5, ● …e5-e4, ● …f5-f4

Partie
1913 New York National – Round 3 – Staffer, John Homer – 0-1 – Jaffe, Charles – G11 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. d3 Nf6 5. g3 d5 6. cxd5 Nxd5 7. Bg2 Be6 8. Bd2 Be7 9. O-O Qd7 10. a3 h6
1926 Berlin – Round 1 – Ahues, Carl – 1-0 – Colle, Edgar – G1 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. e3 e4 5. Nd4 Nxd4 6. exd4 Nf6 7. Be2 c6 8. d3 Bb4 9. O-O O-O 10. dxe4 fxe4
1931 Moskou ch-URS – Round 1 – Kasparian, Genrikh – 0-1 – Goglidze, Viktor – G5 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. d3 Nf6 5. g3 Be7 6. Bg2 O-O 7. O-O d6 8. Nd5 Nxd5 9. cxd5 Nb8 10. Bd2 c5
1931 Moskou ch-URS – Round 1 – Mazel, Isaak Y – 1/2-1/2 – Goglidze, Viktor – G4 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. d3 Nf6 5. e4 Bc5 6. exf5 d5 7. cxd5 Nxd5 8. Bg5 Nxc3 9. bxc3 Qd6 10. Nh4 O-O
1934 NSW Ch – Round 9.1 – Koshnitsky, Gregory – 1-0 – Nield Alan E – G11 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. e3 Nf6 5. d4 e4 6. Nd2 Bb4 7. Ne2 d5 8. Nf4 Ne7 9. Qa4+ Nc6 10. a3 Bxd2+
1938 USA Ch – Round 1 – Santasiere, Anthony – 0-1 – Dake, Arthur William – G2 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. e3 Nf6 5. d4 e4 6. Nd2 Bb4 7. Qb3 d6 8. Be2 O-O 9. O-O a5 10. f3 Bxc3
1938 USA Ch – Round 9 – Santasiere, Anthony – 1-0 – Suesman, Walter B – G23 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. e3 Nf6 5. d4 e4 6. Nd2 Bb4 7. Be2 Bxc3 8. bxc3 d6 9. Qb3 b6 10. Ba3 Na5
1942 Kuibyshev – Round 1 – Sokolsky, Alexey – 0-1 – Smyslov, Vladimir – G1 1. c4 e5 2. Nc3 f5 3. Nf3 Nc6 4. e3 Nf6 5. d4 e4 6. Nd2 Bb4 7. Qb3 a5 8. Be2 d6 9. O-O O-O 10. a3 Bxc3
1942 Kuibyshev – Round 10 – Sokalsky, Alexander – 0-1 – Smyslov, Vasily – G45 1. c4 e5 2. Nc3 f5 3. Nf3 Nc6 4. e3 Nf6 5. d4 e4 6. Nd2 Bb4 7. Qb3 a5 8. Be2 d6 9. O-O O-O 10. a3 Bxc3
1946 Buenos Aires – Round 1 – Alvarez Martin, Pedro – 1-0 – Wexler, Bernardo – G3 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. d3 Nf6 5. g3 Bb4 6. Bg2 Bxc3+ 7. bxc3 O-O 8. O-O d6 9. Rb1 Rb8 10. Nd2 Qe8
1946 Groningen – Round 15 – Kottnauer, Cenek – 1/2-1/2 – Steiner, Heinrich Jun. – G67 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. e3 Nf6 5. d4 e4 6. Ng1 Bb4 7. Bd2 O-O 8. Nge2 Kh8 9. Nf4 d6 10. h4 a5
1946 Staunton, Groningen NED – Round 15 – Kottnauer, Cenek – 1/2-1/2 – Steiner, Herman – G50 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. e3 Nf6 5. d4 e4 6. Ng1 Bb4 7. Bd2 O-O 8. Nge2 Kh8 9. Nf4 d6 10. h4 a5
1948 US Open – Round 5 – Lyle, G. – 0-1 – Steiner, Herman – G25 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. d3 Nf6 5. Bg5 Be7 6. Bxf6 Bxf6 7. Nd5 O-O 8. Nxf6+ Qxf6 9. Qc2 d6 10. g3 e4
1956 AUT-DDR m – Round 2.4 – Herrmann, Ludwig – 0-1 – Kinzel, Anton – G10 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. e3 Nf6 5. d4 e4 6. Ng5 d6 7. h4 Qe7 8. Nh3 Nd8 9. Nf4 c6 10. d5 c5
1961 Oberhausen etc – Round 7 – Udovcic, Mijo – 0-1 – Korchnoi, Viktor – G169 1. c4 e5 2. Nf3 Nc6 3. Nc3 f5 4. d3 d6 5. g3 g6 6. Bg2 Bg7 7. O-O Nge7 8. Bd2 h6 9. Rb1 Be6 10. b4 Qd7
1962 Mar del Plata – Round 12 – Smyslov, Vladimir – 1/2-1/2 – Polugaevsky, Lev – G100 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. e3 Nf6 5. d4 e4 6. Nd2 d6 7. Be2 g6 8. b4 Bg7 9. b5 Ne7 10. O-O O-O
1963 HUN-RSFSR – Round 3.7 – Dely, Peter – 0-1 – Khodos, German – G23 1. c4 e5 2. Nf3 Nc6 3. Nc3 f5 4. e3 Nf6 5. d4 e4 6. Nd2 g6 7. f3 exf3 8. Nxf3 Bg7 9. Bd3 O-O 10. O-O Re8
1965 USSR – Round 1 – Cherskikh – 0-1 – Cherepkov, Alexander V – G2 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. d3 Nf6 5. g3 Bb4 6. Bg2 O-O 7. O-O Bxc3 8. bxc3 d6 9. Rb1 Qe8 10. Ne1 Qh5
1966 Kislovodsk – Round 5 – Stefanov , Preslav – 0-1 – Kholmov, Ratmir D – G27 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. d3 Nf6 5. g3 d6 6. Bg2 g6 7. O-O Bg7 8. Rb1 O-O 9. b4 h6 10. b5 Ne7
2. Norway Chess 2014 – Round 8.4 – Svidler, Peter – 1/2-1/2 – Carlsen, Magnus – G31 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. d3 Nf6 5. g3 Bb4 6. Bg2 Bxc3+ 7. bxc3 d6 8. O-O O-O 9. Rb1 Qe8 10. Qb3 b6
41. Olympiad Open 2014 – Round 1.28 – Nader Obeid – 0-1 – Ivanisevic, Ivan – G44 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. d3 Nf6 5. e3 Bb4 6. Bd2 O-O 7. Be2 d6 8. Qc2 Bxc3 9. Bxc3 Qe8 10. h3 a5
42. Olympiad 2016 – Round 3.12 – Rodshtein, Maxim – 1/2-1/2 – Ivanisevic, Ivan – G178 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. g3 Nf6 5. d4 e4 6. Nh4 d6 7. Ng2 Be7 8. Nf4 O-O 9. h4 Nb4 10. a3 Na6
Amber Rapidplay 2002 – Round 2 – Ljubojevic, Ljubomir – 1-0 – Piket, Jeroen – G6 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. d3 Nf6 5. g3 g6 6. Bg2 Bg7 7. O-O O-O 8. Rb1 d6 9. b4 a6 10. a4 h6
FIDE WCh KO 2001 – Round 3.1 – Anastasian, Ashot – 1/2-1/2 – Nikolic, Predrag – G247 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. e4 Bc5 5. exf5 d6 6. Bd3 Nh6 7. Be4 Nxf5 8. O-O O-O 9. d3 Ncd4 10. Nxd4 Bxd4
FIDE World Rapid 2014 – Round 10.39 – Ghaem Maghami, Ehsan – 0-1 – Anton Guijarro, David – G237 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. g3 Nf6 5. Bg2 d6 6. d3 g6 7. O-O Bg7 8. Rb1 O-O 9. b4 h6 10. b5 Ne7
GCT Blitz YourNextMove 2017 – Round 2.1 – Aronian, Levon – 1-0 – Ivanchuk, Vasyl – G6 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. g3 d6 5. d4 e4 6. d5 Ne5 7. Nxe5 dxe5 8. g4 g6 9. gxf5 gxf5 10. Rg1 Nf6
PCA Qualifiers 1993 – Round 8 – Kamsky, Gata – 1/2-1/2 – Nikolic, Predrag – G141 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. d3 Nf6 5. g3 g6 6. Bg2 Bg7 7. O-O O-O 8. Rb1 a5 9. a3 d6 10. b4 axb4
Smyslov Region Group Cup 2021 – Round 12.4 – Zvjaginsev, Vadim – 0-1 – Fedoseev, Vladimir – G125 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. g3 Nf6 5. d4 e4 6. Nh4 g6 7. Bg5 Be7 8. Qd2 d5 9. e3 Be6 10. Ng2 dxc4
World Blitz 2018 – Round 18.43 – Potkin, Vladimir – 1-0 – Mchedlishvili, Mikheil – G1077 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. g3 Nf6 5. d4 e4 6. Nh4 g6 7. Bg5 Bg7 8. Qd2 O-O 9. Nd5 Ne7 10. Nxf6+ Bxf6
World Blitz 2019 – Round 14.24 – Petrosyan, Manuel – 0-1 – Svidler, Peter – G933 1. c4 e5 2. Nc3 Nc6 3. Nf3 f5 4. d3 Nf6 5. g3 Bb4 6. Bd2 d6 7. Bg2 a6 8. O-O O-O 9. Nd5 Bxd2 10. Nxd2 Ne7

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