A02f — Bird: 1..c5

1.f4 c5 * ○ Trait aux Blancs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Avantages : paire de fous.
Faiblesses adverses : Bc8 enfermé, Bf8 enfermé, roi noir au centre.
Problèmes : roi au centre, Bc1 enfermé, Bf1 enfermé, 6 pièces non développées (B1, G1, C1, F1, A1, H1).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● e4 — Centre d4+e4, libère Bf1
● Nbd2 — Développer Nb1
● Nf3 — Développer Ng1
● d3 — Libérer Bc1

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Avantages : paire de fous.
Faiblesses adverses : Bc1 enfermé, Bf1 enfermé, roi blanc au centre.
Problèmes : roi au centre, Bc8 enfermé, Bf8 enfermé, 6 pièces non développées (B8, G8, C8, F8, A8, H8).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● ...d6 — Libérer Bc8
● ...Nc6 — Développer Nb8
● ...Nf6 — Développer Ng8
● ...Bd6 — Développer Bf8

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

A02f —

1.f4 c5

Eval: [+0.01]

Les coups candidats

2.Nf3 — 75.5% (3957 parties)

Ambassadeurs : Panbukchian, Valentin (28x), Becx, Cesar (22x), Just, Gabriele, Dr. (21x), Heinola, Kari P. (18x), Grunberg, Mihai-Lucian (17x), Pessi, Juha (12x), Jakubiec, Artur (12x), Bocharov, Ivan (12x)

2.b3 — 10.7% (559 parties)

Ambassadeurs : Hanegby, Avigdor (15x), Heinola, Kari P. (8x), Rennert, Ralf (7x), Durst, Uwe (7x), Brodie, Hugh (6x), Thonig, Manfred (6x), Poppner, Dietmar (6x), Kuess, Mario (5x)

2.e4 — 6.6% (347 parties) →

Ambassadeurs : Arnold, Robert G (10x), Chervenkov, Dinko (5x), Pregitzer, Gyorgy (5x), Roynet, Sylvie (5x), Flury, Samuel (4x), Lassan, Christian (3x), Nielsen, Erik (3x), Kuhendiran, Tharshan (3x)

2.e3 — 3.8% (200 parties)

Ambassadeurs : Hrnciar, Roman (8x), Oberste, Norbert (4x), Bird, Henry (3x), Antusch, Ingrid (3x), Raupp, C. (3x), Raupp, S. (3x), Cochrane, John Miles (2x), Somacarana (2x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	2.Nf3	2.b3	2.e4	2.e3
<1800	238	72%	11%	8%	5%
1800-2200	2358	75%	11%	7%	4%
2200-2600	1361	83%	8%	4%	1%
2600+	11	73%	—	—	—

Évolution par décennie (% des parties)

Décennie	N parties	2.Nf3	2.b3	2.e4	2.e3
1840s	1	—	—	—	—
1850s	7	29%	—	—	57%
1860s	4	50%	—	25%	25%
1870s	4	25%	—	25%	50%
1880s	5	40%	—	—	40%
1890s	2	100%	—	—	—
1900s	6	50%	—	—	50%
1910s	4	75%	—	—	—
1920s	5	40%	20%	20%	20%
1930s	10	60%	30%	—	10%
1940s	5	80%	—	—	20%
1950s	27	74%	4%	11%	11%
1960s	67	85%	3%	6%	4%
1970s	129	82%	10%	3%	2%
1980s	202	76%	8%	7%	2%
1990s	1042	69%	17%	6%	5%
2000s	1802	75%	12%	7%	3%
2010s	1700	79%	7%	7%	3%
2020s	218	82%	7%	5%	1%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
2.Nf3	79%	82%	▲ +2.8%
2.b3	7%	7%	+0.2%
2.e4	7%	5%	▼ -1.7%
2.e3	3%	1%	▼ -2.1%

Joueurs célèbres

Champions du monde dans cette position

Carlsen, Magnus — 2 parties
Karpov, Anatoly — 1 partie

Parties historiques

2.Nf3 — 75.5% (3957 parties)

1851 — Horwitz, Bernhard vs Staunton, Howard — 0-1 — London ENG
1856 — Bird, Henry vs Falkbeer, Ernst — 0-1 — London ENG
1863 — Schallopp, Emil vs Dahl Schutt, Frederik — 1-0 — Berlin GER
1869 — MacDonnell vs Wisker, John — 1-0 — Glowworm
1873 — Bird, Henry vs Wisker, John — 1-0 — London ENG

2.b3 — 10.7% (559 parties)

1923 — Hellmann Ernesto vs Traubner, Giulio — 1-0 — Trieste
1935 — Rasmussen, Edvard vs Enevoldsen, Harald — 0-1 — Copenhagen DEN
1937 — Eliskases, Erich vs Sherbaum — 1-0 — Graz AUT
1939 — Christensen, Alfred vs Luckis, Marcos — 1/2-1/2 — Buenos Aires ARG
1954 — Zinn, Lothar vs Moehring, Guenther — 1-0 — Schkopau

2.e4 — 6.6% (347 parties)

1865 — Avery, Thomas vs Staunton, Howard — 0-1 — Birmingham ENG
1874 — Perrin, Fleur vs Elder, Frederic — 1-0 — Chicago ch-USA
1924 — Nimzowitsch, Aron vs Olson, Anton — 1-0 — Copenhagen DEN
1950 — Deppe, Georg vs Stappenbeck, Heinz — 1-0 — Detmold
1955 — Tipary, Lajos vs Grob Alday, Vicente Tomas — 1/2-1/2 — Budapest HUN

2.e3 — 3.8% (200 parties)

1851 — Emma Iniya Williams R vs Staunton, Howard — 0-1 — London ENG
1855 — Cochrane, John Miles vs Somacarana — 1-0 — Calcutta IND
1855 — Cochrane, John Miles vs Somacarana — 0-1 — Calcutta IND
1856 — Bird, Henry vs Falkbeer, Ernst — 0-1 — London ENG
1861 — Pindar, Edward vs Blackburne, Joseph — 1-0 — Manchester ENG

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

Cases

	♔ Blancs	♚ Noirs
Cases fortes	—	—
Cases faibles	—	—
Centre	● e5 (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	6 (b1, 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	semi-ouvert
Ruptures	● c2-c3, ● d2-d3, ● e2-e3, ● f4-f5	● …c5-c4, ● …d7-d6, ● …d7-d5, ● …e7-e6, ● …e7-e5, ● …f7-f6, ● …f7-f5

Partie
1905 It (Men) Barmen GER – Round 1 – Mortimer, James – 1/2-1/2 – Marchand, Max – G82 1. f4 c5 2. e3 d5 3. d4 e6 4. Nf3 Bd6 5. c3 Nc6 6. Bd3 Nf6 7. O-O Qc7 8. Ne5 b6 9. Nd2 Bb7 10. Qe2 O-O
1905 It (Men) Barmen GER – Round 1 – Mortimer, James – 1/2-1/2 – Reggio, Arturo – G83 1. f4 c5 2. e3 d5 3. d4 Bf5 4. Bd3 e6 5. Nf3 Nc6 6. c3 Bxd3 7. Qxd3 Nf6 8. Nbd2 cxd4 9. exd4 Bd6 10. Ne5 Nd7
1920 Berlijn – Round 5 – Tartakower, Savielly – 1-0 – Leonhardt, Paul – G15 1. f4 c5 2. e3 g6 3. Nf3 Bg7 4. d4 cxd4 5. exd4 d6 6. Bd3 Qb6 7. c3 Nh6 8. O-O O-O 9. Kh1 Bf5 10. Bxf5 gxf5
1935 Copenhagen – Round 1 – Rasmussen, Edvard – 0-1 – Enevoldsen, Harald – G23 1. f4 c5 2. b3 Nc6 3. Nf3 e6 4. Bb2 Nf6 5. e3 b6 6. Be2 Bb7 7. O-O Be7 8. Qe1 Qc7 9. d3 Nd5 10. Bd1 Bf6
1939 Buenos Aires ol prel-C – Round 6 – Christensen, Alfred – 1/2-1/2 – Luckis, Marcos – G21 1. f4 c5 2. b3 Nf6 3. Bb2 g6 4. Nf3 Bg7 5. e3 d6 6. Be2 Nc6 7. c4 O-O 8. O-O Bd7 9. Nc3 a6 10. d4 Ng4
1942 Mar del Plata – Round 14 – Pelikan, Jan – 1-0 – Luckis, Marcos – G119 1. f4 c5 2. Nf3 g6 3. e3 Bg7 4. Be2 Nf6 5. O-O O-O 6. Qe1 Nc6 7. d3 d5 8. Qh4 Qc7 9. Nbd2 Bf5 10. h3 Nb4
1951 Hungary Ch – Round 1 – Tipary, Lajos – 0-1 – Kluger, Gyula – G83 1. f4 c5 2. e3 d5 3. d4 e6 4. c3 Bd6 5. Nf3 Ne7 6. Bd3 Qc7 7. O-O Nbc6 8. Kh1 f6 9. Nbd2 O-O 10. dxc5 Bxc5
1954 DDR Ch U20 – Round 7 – Zinn, Lothar – 1-0 – Moehring, Guenther – G33 1. f4 c5 2. b3 d5 3. e3 Nf6 4. Bb2 Bg4 5. Nf3 e6 6. h3 Bf5 7. Bb5+ Nfd7 8. O-O Qb6 9. Ba4 Nc6 10. Ne1 h5
1958 Buenos Aires CA – Round 1 – Palermo, Vicente – 0-1 – Pelikán, Jiří – G5 1. f4 c5 2. Nf3 g6 3. d3 d6 4. g3 Nc6 5. Bg2 Bg7 6. O-O Nh6 7. e4 Bg4 8. h3 Bxf3 9. Qxf3 f5 10. c3 O-O
1960 It Bad Salzungen GER – Round 9 – Liebert, Heinz – 1/2-1/2 – Bertholdt, Dieter – G40 1. f4 c5 2. Nf3 g6 3. g3 Bg7 4. Bg2 Nc6 5. O-O e6 6. d3 Nge7 7. c3 O-O 8. Kh1 d6 9. Na3 Rb8 10. Nc2 b5
1961 Vrnjacka Banja ct women – Round 10 – Lazarevic, Milunka – 0-1 – Gaprindashvili, Nona – G55 1. f4 c5 2. Nf3 g6 3. e3 Bg7 4. d3 e6 5. Be2 Ne7 6. O-O Nbc6 7. e4 d6 8. c3 O-O 9. Be3 Rb8 10. d4 f5
1961 Zuerich – Round 1 – Larsen, Benjamin Holsko – 1/2-1/2 – Keres, Paul – G8 1. f4 c5 2. Nf3 g6 3. e4 Bg7 4. Be2 Nc6 5. O-O e6 6. d3 Nge7 7. c3 O-O 8. Be3 b6 9. Nbd2 f5 10. Qe1 Ba6
1965 Tallinn ch-URS – Round 1 – Bronstein, David I – 1/2-1/2 – Kuzmin, Gennadiy – G126 1. f4 c5 2. Nf3 g6 3. e3 Bg7 4. Be2 Nc6 5. O-O Nh6 6. c3 O-O 7. d4 cxd4 8. cxd4 d5 9. Nc3 Na5 10. b4 Nc6
1966 FRA Ch Grenoble FRA – Round 4 – Weill, Roland – 0-1 – Roos, Michel – G11 1. f4 c5 2. Nf3 g6 3. e3 Bg7 4. c4 d6 5. Nc3 Nh6 6. Be2 O-O 7. b3 Nc6 8. Bb2 e5 9. fxe5 dxe5 10. O-O e4
1966 La Habana olm fin-A – Round 9 – Minev, Nikolay N – 1/2-1/2 – Pachman, Ludek – G175 1. f4 c5 2. Nf3 g6 3. e3 Bg7 4. Be2 Nf6 5. O-O O-O 6. Qe1 Nc6 7. d3 d6 8. e4 e5 9. Nc3 Ne8 10. Nd5 Be6
1967 Capablanca Memorial – Round 11 – Larsen, Benjamin Holsko – 1-0 – O'Kelly de Galway, Alberic – G102 1. f4 c5 2. Nf3 g6 3. e4 Bg7 4. Be2 Nc6 5. O-O d6 6. d3 e6 7. a4 Nge7 8. c3 d5 9. Na3 b6 10. e5 h5
1967 ITA-ch28 Savona – Round 8 – Palmiotto, Fiorentino – 0-1 – Tatai, Stefano – G20 1. f4 c5 2. b3 d5 3. Bb2 Nf6 4. Nf3 g6 5. e3 Bg7 6. Bb5+ Bd7 7. Bxd7+ Qxd7 8. Ne5 Qd6 9. O-O O-O 10. d3 Nfd7
1968 URS Team Ch – Round 1 – Vorobiev, Aleksandr Aleks – 0-1 – Kupreichik, Viktor D – G178 1. f4 c5 2. Nf3 g6 3. c4 Bg7 4. g3 Nc6 5. Bg2 e6 6. O-O Nge7 7. Nc3 b6 8. d3 O-O 9. Ne4 d5 10. cxd5 exd5
1969 Raach zt – Round 12 – Lahti, Jouko – 0-1 – Jansson, Borje – G110 1. f4 c5 2. e3 g6 3. Nf3 Bg7 4. Be2 Nc6 5. O-O d5 6. d4 Qd6 7. c3 Nh6 8. Qe1 O-O 9. Ne5 f6 10. Nd3 b6
FIDE World Rapid Championship 2014 – Round 13.11 – Nakamura, Hikaru – 1-0 – Kryvoruchko, Yuriy – G49 1. f4 c5 2. g3 Nc6 3. Bg2 g6 4. d3 Bg7 5. Nf3 e6 6. O-O Nge7 7. e4 O-O 8. c3 d5 9. e5 d4 10. c4 f6
World Blitz 2019 – Round 16.80 – Tsoi, Dmitry – 0-1 – Popov, Ivan – G1111 1. f4 c5 2. g3 g6 3. Bg2 Bg7 4. Nf3 Nc6 5. O-O d5 6. c3 Nf6 7. d3 O-O 8. h3 b5 9. Be3 Nd7 10. Qe1 Bb7

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