A21v — English: King’s, 2.Nc3 f5

1.c4 e5 2.Nc3 f5 3.g3 Nf6 4.Bg2 * ● Trait aux Noirs

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 b5 et d5, un fou actif en g2 et la paire de fous.

Côté adverse. Les fous enfermés en c8 et f8 et le roi resté au centre.

En contrepartie. Le roi n'est pas encore à l'abri et plusieurs pièces dorment encore (le cavalier g1, le fou c1 et les tours a1 et h1).

Plans. O-O (Mettre le roi en sécurité, connecter les tours) ; Nf3 (Développer Ng1) ; d3 (Libérer Bc1).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Atouts. Les Noirs s'appuient sur la case forte g4, un avant-poste en g4 et la paire de fous.

Côté adverse. Le fou enfermé en c1 et le roi resté au centre.

En contrepartie. Le roi n'est pas encore à l'abri et plusieurs pièces dorment encore (le cavalier b8, les fous c8 et f8 et les tours a8 et h8).

Plans. O-O (Mettre le roi en sécurité, connecter les tours) ; ...d6 (Libérer Bc8) ; ...Nc6 (Développer Nb8) ; ...Be7 (Développer Bf8) ; ...c5 (Rupture).

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→g3, h2→g3	—
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● b5 (2v0), ● d5 (3v1)	● g4 (2v0)
Cases faibles	● e4	—
Centre	● d5 (3v1)	● d4 (1v0)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bg2	● Bg2 Actif (mob. 7)
Bc8		● Bc8 Non développé (mob. 0)
Bf8		● Bf8 Non développé (mob. 5)
Paire de fous	● Oui	● Oui
Non développées	4 (g1, c1, a1, h1)	5 (b8, 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, ● f2-f3	● …c7-c6, ● …c7-c5, ● …d7-d6, ● …d7-d5, ● …e5-e4, ● …f5-f4

Partie
1927 London Olympiad 1st – Round 1.43 – Carls, Carl – 1-0 – Romih, Max – G5 1. c4 e5 2. Nc3 f5 3. g3 Nf6 4. Bg2 c6 5. d4 e4 6. Bg5 Bb4 7. e3 O-O 8. Ne2 d5 9. cxd5 Qxd5 10. O-O Bxc3
1942 Moscow Ch – Round 1 – Aramanovich, I – 0-1 – Yudovich, Mikhail M – G1 1. c4 e5 2. Nc3 f5 3. g3 Nf6 4. Bg2 d6 5. Nf3 Be7 6. O-O O-O 7. d4 e4 8. Ne1 c6 9. d5 Nbd7 10. f3 Ne5
1951 Marianske Lazne zt – Round 1 – Basjuni, Sad Zaglul – 0-1 – Szabo, Ladislav – G2 1. c4 f5 2. Nc3 Nf6 3. g3 e5 4. Bg2 Be7 5. Nf3 d6 6. d4 e4 7. Ng5 c6 8. Qa4 O-O 9. h4 d5 10. c5 b6
1951 Vancouver – Round ? – Vaitonis, Povilas – 1-0 – Holowach, Walter – G32 1. c4 f5 2. Nc3 Nf6 3. g3 e5 4. Bg2 d6 5. e3 Be7 6. Nge2 O-O 7. d4 c6 8. O-O Kh8 9. b3 Na6 10. Qd2 Qe8
1953 GER Ch 15th – Round 4 – Maicherczyk, Georg – 0-1 – Ahues, Carl – G8 1. c4 e5 2. Nc3 f5 3. g3 Nf6 4. Bg2 Bb4 5. Qc2 Nc6 6. Qxf5 d6 7. Qb1 O-O 8. f3 Be6 9. a3 Bc5 10. d3 Qd7
1953 URS-training – Round 8 – Averbakh, Yuri L – 1/2-1/2 – Kotov Lundqvist, Alex – G25 1. c4 e5 2. Nc3 f5 3. g3 Nf6 4. Bg2 Be7 5. d3 O-O 6. Nf3 d6 7. O-O a5 8. a3 c6 9. Rb1 Kh8 10. b4 axb4
1956 Leningrad ch-URS – Round 1 – Bannik, Anatolij – 1/2-1/2 – Zurakhov, Vladlen Y – G11 1. c4 e5 2. Nc3 f5 3. g3 Nf6 4. Bg2 g6 5. e3 Bg7 6. Nge2 O-O 7. d4 e4 8. f3 exf3 9. Bxf3 Na6 10. O-O c6
1956 Marianske Lazne/Praha – Round 4 – Rejfir, Josef – 1-0 – Alster, Ladislav – G19 1. c4 e5 2. Nc3 f5 3. g3 Nf6 4. Bg2 g6 5. e3 Bg7 6. Nge2 O-O 7. d4 d6 8. b4 exd4 9. exd4 Nbd7 10. O-O Nh5
1957 Leningrad Ch – Round 6 – Stoliar, Efim Samoilovich – 1-0 – Ragozin, Viacheslav – G42 1. c4 f5 2. Nc3 Nf6 3. g3 e5 4. Bg2 c6 5. d4 e4 6. Nh3 Be7 7. d5 d6 8. O-O Nbd7 9. b3 O-O 10. f3 Qa5
1957 Minsk zt – Round 15 – Suetin, Alexey S – 1-0 – Zvorykina, Kira Alekseyevna – G109 1. g3 e5 2. c4 f5 3. Bg2 Nf6 4. Nc3 Be7 5. d3 c6 6. f4 Qb6 7. fxe5 Ng4 8. d4 d6 9. exd6 Bf6 10. Nf3 Be6
1957 Moskou ch-URS – Round 9 – Bannik, Anatolij – 1/2-1/2 – Antoshin, Vladimir S – G88 1. c4 e5 2. Nc3 f5 3. g3 Nf6 4. Bg2 c6 5. d4 d6 6. dxe5 dxe5 7. Qxd8+ Kxd8 8. Nf3 e4 9. Ng5 Ke8 10. f3 h6
1957 Rio de Janeiro zt – Round 1 – Bianco Esposito, Antonio – 1/2-1/2 – Engels, Ludwig – G1 1. c4 e5 2. Nc3 f5 3. g3 Nf6 4. Bg2 Bc5 5. e3 Nc6 6. Nge2 e4 7. d4 exd3 8. Qxd3 Ne5 9. Qxf5 Qe7 10. Qc2 O-O
1958 Munich olm prel – Round 6 – Lombardy, William J – 1-0 – Heidenfeld, Wolfgang – G124 1. c4 f5 2. g3 Nf6 3. Bg2 e5 4. Nc3 d6 5. Nf3 Be7 6. O-O O-O 7. d3 a5 8. Bd2 Na6 9. Na4 Bd7 10. Rc1 Qc8
1959 URS Team Ch – Round 1 – Botvinnik, Mikhail – 1/2-1/2 – Barenbaum, Alejandro – G4 1. c4 e5 2. g3 f5 3. Bg2 Nf6 4. Nc3 c6 5. d4 e4 6. Bg5 Bb4 7. Qb3 Qe7 8. e3 Bxc3+ 9. Qxc3 O-O 10. Ne2 Na6
1960 CSR Ch – Round 13 – Ujtelky, Maximilian – 1/2-1/2 – Hort, Vlastimil – G107 1. c4 f5 2. Nc3 Nf6 3. g3 e5 4. Bg2 d6 5. e3 c6 6. d4 Be6 7. b3 Be7 8. Nge2 Nbd7 9. O-O Qc7 10. Bb2 g5
1960 Olympiad final C – Round 6 – Boutteville, Cesar – 1-0 – Lagha, Khelil – G9 1. c4 e5 2. Nc3 f5 3. g3 Nf6 4. Bg2 d6 5. e3 c6 6. Nge2 Be6 7. d3 Be7 8. O-O O-O 9. b3 Nbd7 10. e4 fxe4
1960 WchT U26 07th – Round 15 – Baumbach, Friedrich, Dr. – 0-1 – Rakic, Tomislav – G37 1. c4 e5 2. Nc3 f5 3. g3 Nf6 4. Bg2 Be7 5. Nf3 d6 6. O-O c6 7. b4 O-O 8. b5 Qe8 9. bxc6 bxc6 10. Ba3 Nbd7
1961 Zevenaar – Round 3 – O'Kelly, A. – 1-0 – Johannessen, Simon T – G30 1. c4 f5 2. Nc3 Nf6 3. g3 e5 4. Bg2 d6 5. d4 c6 6. e3 Be7 7. Nge2 O-O 8. b3 Nbd7 9. Bb2 Qe8 10. Qd2 Qg6
1962 Budapest-Warsaw m – Round ? – Haag, Ervin – 1-0 – Szukszta, Janus – G4 1. c4 e5 2. g3 f5 3. Bg2 Nf6 4. Nc3 Be7 5. Nf3 Nc6 6. O-O O-O 7. d4 d6 8. d5 Nb8 9. Qc2 Qe8 10. Ne1 Qh5
1962 Capablanca Memorial – Round 21 – Haag, Ervin – 1-0 – Jimenez Zerquera, Eleazar – G207 1. c4 e5 2. g3 f5 3. Nc3 Nf6 4. Bg2 g6 5. d4 exd4 6. Qxd4 Nc6 7. Qd2 Bg7 8. b3 O-O 9. Bb2 d6 10. Nh3 Qe8
1962 Olympiad Varna BUL – Round 8.2 – From, Sigfred – 0-1 – Skold, Kristian – G49 1. c4 e5 2. Nc3 f5 3. g3 Nf6 4. Bg2 c6 5. Nf3 e4 6. Nd4 d5 7. cxd5 cxd5 8. d3 Bc5 9. Nb3 Bb6 10. dxe4 fxe4
1963 AUS Ch – Round 12 – Ozols, Karlis – 1/2-1/2 – Kellner, John Vincent – G17 1. c4 e5 2. Nc3 f5 3. g3 Nf6 4. Bg2 d6 5. b4 g6 6. Qb3 Bg7 7. Nf3 Qe7 8. O-O c6 9. a4 O-O 10. Ba3 Kh8
1963 Bath ch-BCF – Round 10 – Richardson, Harmond – 0-1 – Abrahams, Gerald – G80 1. c4 f5 2. Nc3 Nf6 3. g3 e5 4. Bg2 c6 5. d4 e4 6. h4 d5 7. cxd5 Nxd5 8. Nh3 Nd7 9. Nxd5 cxd5 10. Qa4 a6
1963 Odense – Round 1 – Soby, Frode – 1-0 – Korning, Peter – G3 1. c4 e5 2. Nc3 f5 3. g3 Nf6 4. Bg2 Be7 5. Nf3 Nc6 6. O-O O-O 7. Nd5 e4 8. Nxe7+ Qxe7 9. Ne1 Ne5 10. b3 c6
1963 Toronto Ch – Round 6 – Sarosy, Zoltan L – 0-1 – Zuntaks, Alvis – G6 1. c4 f5 2. Nc3 Nf6 3. g3 e5 4. Bg2 Be7 5. Nf3 d6 6. O-O O-O 7. d3 Qe8 8. b4 c6 9. b5 Qh5 10. c5 Nbd7
1964 Sarajevo BIH – Round 13 – Ivkov, Borislav – 1/2-1/2 – Kozomara, Vlado – G26 1. c4 e5 2. Nc3 f5 3. g3 Nf6 4. Bg2 Be7 5. Nf3 d6 6. d3 c6 7. O-O O-O 8. b4 Qe8 9. b5 Qh5 10. bxc6 Nxc6
1965 Asztalos Memorial 8th – Round 15 – Pirc, Vasja – 1/2-1/2 – Gasztonyi, Endre – G92 1. c4 f5 2. Nc3 Nf6 3. g3 e5 4. Bg2 Be7 5. e3 O-O 6. Nge2 c6 7. d4 d6 8. O-O Qe8 9. c5 d5 10. dxe5 Ng4
1965 Copenhagen – Round 3 – Ujtelky, Maximilian – 1-0 – Nielsen, Jorgen G. – G37 1. c4 e5 2. g3 f5 3. Bg2 Nf6 4. Nc3 c6 5. d4 d6 6. d5 c5 7. f3 Na6 8. Nh3 Nc7 9. O-O Be7 10. Qd3 O-O
1965 Copenhagen – Round 7 – Andersen, Borge – 0-1 – Larsen, Benjamin Holsko – G62 1. c4 f5 2. g3 Nf6 3. Bg2 e5 4. Nc3 c6 5. Nf3 d6 6. O-O Na6 7. d4 e4 8. Ng5 h6 9. Nh3 g5 10. f3 exf3
1966 La Habana olm fin-C – Round 13 – Naranja, Renato – 1/2-1/2 – Vyzantiadis, Lazaros – G34 1. c4 e5 2. Nc3 f5 3. g3 Nf6 4. Bg2 Be7 5. e3 O-O 6. Nge2 d6 7. O-O Qe8 8. d3 Nc6 9. Nd5 Bd8 10. Nec3 Ne7
1966 Panamerican – Round 1 – Schweber, Samuel – 1-0 – Alonso Iglesias, Marco Antonio – G1 1. c4 f5 2. g3 Nf6 3. Bg2 e5 4. Nc3 Be7 5. d3 O-O 6. e4 d6 7. exf5 c6 8. g4 d5 9. cxd5 Nxd5 10. Qb3 Bb4
1967 Harrachov – Round 1.4 – Faibisovich, Vadim Z – 1/2-1/2 – May Moe Sett – G123 1. c4 e5 2. Nc3 f5 3. g3 Nf6 4. Bg2 Be7 5. d4 d6 6. dxe5 dxe5 7. Qxd8+ Bxd8 8. b3 O-O 9. Bb2 Nbd7 10. Nf3 e4
1968 Belgrade – Round 1 – Ujtelky, Maximilian – 0-1 – Messing, Hrvoje – G3 1. c4 e5 2. g3 f5 3. Bg2 Nf6 4. Nc3 Be7 5. e3 O-O 6. Nge2 d6 7. b4 c6 8. b5 Be6 9. Qa4 Nbd7 10. bxc6 bxc6
1968 Rubinstein Memorial – Round ? – Golz, Werner – 0-1 – Simagin, Vladimir – G75 1. c4 f5 2. g3 Nf6 3. Bg2 e5 4. Nc3 g6 5. e3 Bg7 6. Nge2 d6 7. d4 Nbd7 8. b3 O-O 9. Qc2 Re8 10. O-O e4
1969 San Juan – Round 6 – Astacio Colon, Angel G. – 0-1 – Larsen, Benjamin Holsko – G38 1. c4 f5 2. Nc3 Nf6 3. g3 e5 4. Bg2 Bb4 5. a3 Bxc3 6. dxc3 d6 7. Bg5 O-O 8. Nf3 Nbd7 9. b4 Qe8 10. Bxf6 Nxf6
1973 Leningrad Interzonal – Round 16 – Uhlmann, Wolfgang – 0-1 – Larsen, Bent – G1 1. c4 f5 2. Nc3 Nf6 3. g3 e5 4. Bg2 c6 5. d4 e4 6. Nh3 Na6 7. O-O Nc7 8. f3 d5 9. cxd5 cxd5 10. Bg5 Be7
43. Olympiad 2018 – Round 8.21 – Glud, Jakob Vang – 1-0 – Bogner, Sebastian – G523 1. c4 f5 2. g3 Nf6 3. Bg2 e5 4. Nc3 Bb4 5. Nd5 Nxd5 6. cxd5 O-O 7. Qb3 Ba5 8. Nf3 Qf6 9. O-O e4 10. Ne1 d6
Linares 1993 – Round 5 – Ljubojevic, Ljubomir – 1-0 – Salov, Valery – G13 1. c4 f5 2. Nc3 Nf6 3. g3 e5 4. Bg2 g6 5. d4 exd4 6. Qxd4 Nc6 7. Qh4 Bg7 8. Bh6 O-O 9. Nh3 Ne5 10. Bxg7 Kxg7
World Blitz 2016 – Round 17.13 – Mchedlishvili, Mikheil – 1/2-1/2 – Yu, Yangyi – G665 1. c4 e5 2. g3 f5 3. Bg2 Nf6 4. Nc3 c6 5. d4 e4 6. Nh3 d5 7. cxd5 cxd5 8. Bg5 Bb4 9. Qb3 Nc6 10. O-O Bxc3

A21v — King’s

1.c4 e5 2.Nc3 f5 3.g3 Nf6 4.Bg2

Eval: [+0.13]

Les coups candidats

4…Nc6 — 24.7% (663 parties) →

Ambassadeurs : Carls, Carl (3x), Bogoljubow, Efim (3x), Weyerstrass, Ronald (3x), Bachofner, Andreas (3x), Herzog, Klaus (3x), Bonoldi, Fabio (3x), Obukhov, Gennady (3x), Golombek, Harry (2x)

4…c6 — 16.0% (429 parties)

Ambassadeurs : Horvath, Zoltan (4x), Andersen, Borge (3x), Hapala, Michaela (3x), Bielmeier, Ludwig (3x), Arsenault, Michel (3x), Laurin Jacques (3x), Abrahams, Gerald (2x), Herzog, Franz (2x)

4…d6 — 14.9% (401 parties)

Ambassadeurs : Heidenfeld, Wolfgang (3x), Levitt, Jonathan P (3x), Muth, Matthias Potisarath (3x), Hardy, Olivier (2x), Konopleva, Natalia (2x), Tu, Hoang Thong (2x), Ruckschloss, Karol (2x), Urday, Henry (2x)

4…Bb4 — 13.1% (351 parties)

Ambassadeurs : Westerinen, Heikki M.J. (15x), Milov, Leonid (6x), Ljubisavljevic, Zivojin Z (5x), Herzog, Klaus (4x), Ochoa De Echaguen, Francisco Javier (3x), Larsen, Benjamin Holsko (3x), De La Villa Garcia, Jesus Maria (3x), Smyslov, Vladimir (3x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	4…Nc6	4…c6	4…d6	4…Bb4
<1800	106	22%	23%	8%	12%
1800-2200	1202	24%	18%	15%	10%
2200-2600	704	27%	8%	16%	23%
2600+	8	—	12%	12%	25%

Évolution par décennie (% des parties)

Décennie	N parties	4…Nc6	4…c6	4…d6	4…Bb4
1820s	1	—	—	—	—
1890s	1	100%	—	—	—
1910s	1	—	—	—	—
1920s	4	50%	25%	—	—
1930s	8	25%	12%	—	—
1940s	7	57%	14%	29%	—
1950s	28	14%	21%	18%	4%
1960s	65	32%	18%	18%	5%
1970s	75	29%	9%	21%	4%
1980s	98	18%	11%	11%	23%
1990s	566	21%	17%	17%	14%
2000s	855	22%	18%	15%	12%
2010s	846	28%	15%	13%	13%
2020s	132	27%	11%	15%	20%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
4…Nc6	28%	27%	▼ -1.2%
4…c6	15%	11%	▼ -3.2%
4…d6	13%	15%	▲ +2.3%
4…Bb4	13%	20%	▲ +6.6%

Joueurs célèbres

Champions du monde dans cette position

Smyslov, Vladimir — 4 parties
Tal, Mikhail — 2 parties
Botvinnik, Mikhail — 2 parties
Karpov, Aleksandr — 1 partie

Parties historiques

4…Nc6 — 24.7% (663 parties)

1898 — Blackburne, Joseph vs Schiffers, Emanuel — 1/2-1/2 — Vienna AUT
1922 — Carls, Carl vs Weenink, Henri — 1/2-1/2 — Berlin GER
1922 — Carls, Carl vs Gomez Gruber, Maria Gabriela — 1-0 — Bad Oeynhausen GER
1932 — Reinhardt, Heinrich vs Kapfer Ewald — 1-0 — Hamburg-Altona GER
1939 — Melngailis, Emilis vs Bogoljubow, Efim — 0-1 — Kemeri / Riga

4…c6 — 16.0% (429 parties)

1927 — Carls, Carl vs Romih, Max — 1-0 — London ENG
1936 — Craddock, James Marston vs Abrahams, Gerald — 1/2-1/2 — Nottingham ENG
1947 — Lauterbach, Werner vs Herzog, Franz — 0-1 — Riedenburg
1951 — Habermann, Ewald vs Schuster, Theodor — 0-1 — Stuttgart GER
1955 — Thiellement, Andre vs Burstein, Sylvain — 1-0 — Toulouse FRA

4…d6 — 14.9% (401 parties)

1942 — Aramanovich, I vs Yudovich, Mikhail M — 0-1 — Moscow RUS
1947 — Lauterbach, Werner vs Niephaus, Walter — 0-1 — Riedenburg
1951 — Vaitonis, Povilas vs Holowach, Walter — 1-0 — Vancouver
1955 — Perkins, N. vs Walker IV, Joseph D — 1-0 — Aberystwyth ch-BCF
1958 — Lombardy, William J vs Heidenfeld, Wolfgang — 1-0 — Munich GER

4…Bb4 — 13.1% (351 parties)

1953 — Maicherczyk, Georg vs Ahues, Carl — 0-1 — Leipzig GER
1962 — Gross, Georg vs Bolton, Alyssa — 0-1 — Eastern Open
1967 — Gotay, J vs Rossolimo, Nicolas — 0-1 — San Juan
1969 — Astacio Colon, Angel G. vs Larsen, Benjamin Holsko — 0-1 — San Juan
1971 — Ost-Hansen, Jacob vs Herzog, Adolf — 1-0 — Athens GRE

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