A03c — Bird: Lasker, 3…c5 4.b3

1.f4 d5 2.Nf3 Nf6 3.e3 c5 4.b3 * ● Trait aux Noirs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Avantages : case forte e5, case forte g5, paire de fous.
Faiblesses adverses : Bc8 enfermé, Bf8 enfermé, roi noir au centre.
Problèmes : roi au centre, Bc1 enfermé, Bf1 enfermé, 5 pièces non développées (B1, C1, F1, A1, H1).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● Nbd2 — Développer Nb1
● d3 — Libérer Bc1
● Bd3 — Développer Bf1
● h3 — Empêcher ...Bg4

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Avantages : case forte e4, case forte g4, case forte d5, avant-poste e4(C), 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 (B8, C8, F8, A8, H8).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● ...Nbd7 — Développer Nb8
● ...Bg4 — Développer Bc8, clouer Nf3
● ...Bd6 — Développer Bf8
● ...c4 — Rupture

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

A03c — Lasker

1.f4 d5 2.Nf3 Nf6 3.e3 c5 4.b3

Eval: [-0.31]

Les coups candidats

4…Nc6 — 39.6% (598 parties)

Ambassadeurs : Brodie, Hugh (7x), Renard, Stephane (7x), Heinola, Kari P. (5x), Thonig, Manfred (5x), Elkina, Yuliya (4x), Janning, Rainer (4x), Hanegby, Avigdor (3x), Sonnenberger, Joerg (3x)

4…g6 — 29.5% (445 parties)

Ambassadeurs : Heinola, Kari P. (6x), Brodie, Hugh (6x), Grimm, Uwe (5x), Christensen, Alfred (4x), Keusch, Horst (4x), Kujovic, Michal (3x), Hanegby, Avigdor (3x), Kanan, Rugsit (3x)

4…e6 — 17.0% (257 parties)

Ambassadeurs : Brodie, Hugh (4x), Mason, James (3x), Bird, Henry (3x), Tartakower, Savielly (3x), Hanegby, Avigdor (3x), Tarrasch, Siegbert (2x), Chigorin, Mikhail (2x), Hogborg (2x)

4…Bg4 — 7.1% (107 parties)

Ambassadeurs : Hanegby, Avigdor (3x), Brodie, Hugh (3x), Filipowicz, Andrzej (1x), Witkowski, Stefan (1x), Illgen, Hans (1x), Groenegress, Wilfried (1x), Weiner, Milan (1x), Sefc, Jan (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	4…Nc6	4…g6	4…e6	4…Bg4
<1800	119	45%	29%	18%	3%
1800-2200	751	44%	28%	15%	7%
2200-2600	139	30%	46%	12%	7%

Évolution par décennie (% des parties)

Décennie	N parties	4…Nc6	4…g6	4…e6	4…Bg4
1880s	7	—	—	71%	—
1890s	3	—	33%	67%	—
1900s	5	40%	—	60%	—
1910s	3	33%	—	67%	—
1920s	9	44%	—	11%	—
1930s	5	20%	40%	20%	—
1940s	7	14%	71%	14%	—
1950s	13	23%	31%	31%	15%
1960s	18	28%	50%	17%	6%
1970s	24	38%	29%	29%	4%
1980s	60	32%	33%	17%	3%
1990s	288	40%	27%	19%	10%
2000s	510	40%	27%	16%	9%
2010s	471	43%	30%	15%	5%
2020s	86	35%	45%	13%	2%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
4…Nc6	43%	35%	▼ -8.0%
4…g6	30%	45%	▲ +15.0%
4…e6	15%	13%	▼ -1.9%
4…Bg4	5%	2%	▼ -2.8%

Joueurs célèbres

Champions du monde dans cette position

Lasker, Emanuel — 2 parties

Parties historiques

4…Nc6 — 39.6% (598 parties)

1905 — Middleton, Arthur vs Heilmann, Benno — 1-0 — Barmen GER
1909 — Evtifeev, Peter Artemievich vs Daniuszewski, Dawid — 0-1 — St Petersburg RUS
1911 — Tartakover vs Suechting, Hugo — 1-0 — Carlsbad CZE
1924 — Edman, V. vs Ehrenstrom, G. — 1-0 — Sweden
1924 — Edman, V. vs Ehrenstrom, G. — 1-0 — Sweden

4…g6 — 29.5% (445 parties)

1892 — Bird, Henry vs Mason, James — 0-1 — London ENG
1935 — Pleci, Isaias vs Fenoglio, Virgilio — 1/2-1/2 — Buenos Aires ARG
1939 — Ulvestad, Olaf vs Levin Astorga, Nicolas Daniel — 1-0 — Ventnor City
1941 — Christensen, Alfred vs Poulsen, Christian — 0-1 — ?
1943 — Mawuli Richardson vs Yanofsky, Daniel Abraham — 0-1 — Dalhousie CAN

4…e6 — 17.0% (257 parties)

1882 — Bird, Henry vs Mason, James — 1/2-1/2 — Vienna AUT
1883 — Chigorin, Mikhail vs Englisch, Berthold — 1/2-1/2 — London ENG
1885 — Mason, James vs Tarrasch, Siegbert — 0-1 — Hamburg GER
1886 — Bird, Henry vs Schallopp, Emil — 0-1 — Nottingham ENG
1889 — Delmar, Eugene vs White, Max — 0-1 — New York, NY USA

4…Bg4 — 7.1% (107 parties)

1954 — Illgen, Hans vs Groenegress, Wilfried — 0-1 — Lemgo
1954 — Weiner, Milan vs Sefc, Jan — 0-1 — Prague CZE
1968 — Filipowicz, Andrzej vs Witkowski, Stefan — 1/2-1/2 — Lodz POL
1975 — Brodie, Hugh vs Leimanis, Eriks — 1/2-1/2 — Potsdam NY
1985 — Giardelli, Sergio C. vs Szmetan, Jorge — 1/2-1/2 — Buenos Aires ch-ARG

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● a2→b3, c2→b3, d2→e3, e3→f4	—
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● e5 (2v0), ● g5 (2v0)	● e4 (2v0), ● g4 (2v0), ● d5 (2v0)
Cases faibles	—	—
Centre	● d4 (2v1), ● e5 (2v0)	● d5 (2v0), ● e4 (2v0)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 2)
Bf1	● Bf1 Non développé (mob. 5)
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)	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	● c2-c3, ● d2-d3, ● e3-e4, ● f4-f5	● …c5-c4, ● …d5-d4, ● …e7-e6, ● …e7-e5

Partie
1902 DSB-13.Kongress – Round 3 – Mason, James – 0-1 – Von Bardeleben, Curt – G11 1. e3 d5 2. f4 Nf6 3. Nf3 c5 4. b3 e6 5. Bb2 a6 6. Be2 Nc6 7. O-O Bd6 8. Qe1 Ne7 9. Ne5 Qc7 10. d3 Ng6
1907 Ostende – Round 2 – Chigorin, Mikhail – 0-1 – Burn, Amos – G24 1. f4 d5 2. Nf3 Nf6 3. e3 c5 4. b3 e6 5. Bb2 Be7 6. Nc3 O-O 7. Bd3 a6 8. Ne5 Nbd7 9. Qf3 Qc7 10. Nd1 Rd8
1927 Moskou ch-URS – Round 15 – Bohatyrchuk, Fedir Parfenovych – 1-0 – Makogonov, Vladimir – G42 1. f4 Nf6 2. Nf3 d5 3. e3 c5 4. b3 Nc6 5. Bb5 Bd7 6. Bb2 e6 7. O-O a6 8. Bxc6 Bxc6 9. d3 b5 10. Qe2 Be7
1929 Paris – Round 10 – Lazard, Frederic – 0-1 – Colle, Edgar – G43 1. f4 d5 2. Nf3 c5 3. e3 Nf6 4. b3 e6 5. Bb2 a6 6. Bd3 Nc6 7. O-O Bd6 8. Nc3 Qc7 9. a3 e5 10. fxe5 Nxe5
1929 Paris Paris FRA – Round 10 – Lazard, Frederic – 0-1 – Colle, Edgar – G13 1. f4 Nf6 2. b3 d5 3. Nf3 c5 4. e3 a6 5. Bb2 Nc6 6. Bd3 e6 7. O-O Bd6 8. Nc3 Qc7 9. a3 e5 10. fxe5 Nxe5
1931 Budapest – Round 13 – Rethy, Pal – 1/2-1/2 – Havasi, Kornel – G72 1. f4 d5 2. Nf3 Nf6 3. b3 c5 4. e3 Nc6 5. Bb2 e6 6. Ne5 Bd6 7. Bb5 Qc7 8. O-O O-O 9. Nxc6 bxc6 10. Bxf6 gxf6
1935 Buenos Aires – Round 8 – Pleci, Isaias – 1/2-1/2 – Fenoglio, Virgilio – G68 1. f4 d5 2. Nf3 Nf6 3. e3 c5 4. b3 g6 5. Bb2 Bg7 6. c4 dxc4 7. Bxc4 O-O 8. O-O Nc6 9. Qe2 a6 10. a4 Nb4
1936 Nottingham – Round ? – Tartakower, Savielly – 1/2-1/2 – Lasker, Emanuel – G113 1. f4 d5 2. Nf3 Nf6 3. e3 c5 4. b3 e6 5. Bb2 Bd6 6. Bd3 a6 7. O-O Nc6 8. c4 dxc4 9. Bxc4 O-O 10. Ne5 Ne7
1936 Nottingham – Round 1 – Tartakower, Savielly – 1/2-1/2 – Lasker, Emanuel – G50 1. f4 d5 2. Nf3 Nf6 3. e3 c5 4. b3 a6 5. Bb2 e6 6. Bd3 Nc6 7. O-O Bd6 8. c4 dxc4 9. Bxc4 O-O 10. Ne5 Ne7
1939 Ventnor City – Round 8 – Ulvestad, Olaf – 1-0 – Levin Astorga, Nicolas Daniel – G16 1. f4 Nf6 2. Nf3 d5 3. e3 c5 4. b3 g6 5. Bb2 Bg7 6. Bb5+ Bd7 7. Bxd7+ Qxd7 8. Qe2 O-O 9. Nc3 Nc6 10. O-O Ne4
1942 Chocen NT – Round ? – Hromadka, Karel – 1-0 – Richter, Emil – G10 1. f4 d5 2. e3 Nf6 3. Nf3 c5 4. b3 e6 5. Bb2 Be7 6. Ne5 Nbd7 7. Qf3 Nxe5 8. fxe5 Nd7 9. Bd3 O-O 10. O-O b6
1947 Aalborg – Round 6 – Christensen, Alfred – 1/2-1/2 – Van Scheltinga, Theo – G23 1. f4 d5 2. Nf3 Nf6 3. e3 c5 4. b3 g6 5. Bb2 Bg7 6. Bb5+ Nbd7 7. O-O O-O 8. Bxd7 Qxd7 9. Qe2 b6 10. d3 Ba6
1953 Bucharest – Round 18 – Barda, Olaf – 1-0 – Ciocaltea, Victor – G177 1. f4 Nf6 2. Nf3 c5 3. e3 d5 4. b3 e6 5. Bb2 Be7 6. Be2 O-O 7. O-O Nc6 8. Qe1 Ne4 9. d3 Nd6 10. g4 Bd7
1954 CSR Ch – Round 9.7 – Weiner, Milan – 0-1 – Sefc, Jan – G79 1. f4 d5 2. Nf3 Nf6 3. e3 c5 4. b3 Bg4 5. Be2 Nc6 6. Bb2 e6 7. Ne5 Bxe2 8. Qxe2 Qc7 9. O-O Bd6 10. d4 Bxe5
1954 OWL Ch – Round 5 – Illgen, Hans – 0-1 – Groenegress, Wilfried – G5 1. f4 d5 2. e3 c5 3. b3 Nf6 4. Nf3 Bg4 5. Bb2 e6 6. Bb5+ Nbd7 7. O-O Be7 8. h3 Bxf3 9. Qxf3 O-O 10. Bxd7 Nxd7
1955 Poland ch13 – Round 17 – Gawlikowski, Stanislaw – 0-1 – Balcarek, Wiktor – G61 1. f4 d5 2. Nf3 Nf6 3. e3 c5 4. b3 Nc6 5. Bb5 a6 6. Bxc6+ bxc6 7. Ne5 Qc7 8. Bb2 e6 9. O-O Bd6 10. d3 O-O
1955 Zittau-A 5th – Round 9 – Kahn, Manfred – 1/2-1/2 – Juettler Helmut – G35 1. f4 d5 2. Nf3 c5 3. e3 Nf6 4. b3 e6 5. Bb2 Bd6 6. Be2 Nc6 7. O-O Qc7 8. Qe1 e5 9. Qg3 Ng4 10. fxe5 Ncxe5
1959 FRG Ch qual 4th – Round 6 – Bialas, Wolfram – 1-0 – Hodakowsky, Georg – G14 1. f4 d5 2. Nf3 Nf6 3. e3 c5 4. b3 Nc6 5. Bb5 Qb6 6. Bxc6+ Qxc6 7. Ne5 Qc7 8. Bb2 g6 9. c4 dxc4 10. bxc4 Bg7
1959 Mar del Plata – Round 1 – Wexler, Bernardo – 1/2-1/2 – Shocron, Ruben – G64 1. f4 d5 2. Nf3 c5 3. e3 Nf6 4. b3 g6 5. Bb5+ Nbd7 6. Bb2 Bg7 7. O-O O-O 8. a4 a6 9. Be2 b6 10. Qe1 Bb7
1961 Kiel – Round 6 – Brinckmann, Alfred – 1/2-1/2 – Skold, Kristian – G16 1. f4 d5 2. e3 c5 3. Nf3 Nf6 4. b3 Nc6 5. Bb5 g6 6. Bb2 Bg7 7. Bxc6+ bxc6 8. d3 O-O 9. Nbd2 a5 10. a4 Ba6
1966 Palermo Memorial – Round 1 – Bazan, Osvaldo – 0-1 – Herz, Enrique – G3 1. f4 d5 2. Nf3 c5 3. e3 Nf6 4. b3 g6 5. Bb2 Bg7 6. Bb5+ Bd7 7. a4 O-O 8. O-O Nc6 9. Qe1 a6 10. Be2 Qb6
1968 Alma Ata ch-URS – Round 8 – Zaitsev, Alexander – 1-0 – Klovans, Janis – G82 1. f4 d5 2. Nf3 Nf6 3. e3 c5 4. b3 e6 5. Bb2 Be7 6. Bb5+ Bd7 7. a4 Nc6 8. O-O O-O 9. Bxc6 Bxc6 10. Ne5 Rc8
1968 POL Ch 25th – Round 3 – Filipowicz, Andrzej – 1/2-1/2 – Marszalek, Rafal – G16 1. f4 d5 2. Nf3 Nf6 3. e3 c5 4. b3 g6 5. Bb2 Bg7 6. Be2 Nc6 7. O-O O-O 8. Qe1 d4 9. Qh4 a6 10. a4 Nb4
1968 POL Ch 25th – Round 9 – Filipowicz, Andrzej – 1/2-1/2 – Witkowski, Stefan – G54 1. f4 d5 2. Nf3 Nf6 3. e3 c5 4. b3 Bg4 5. h3 Bxf3 6. Qxf3 e6 7. Bb2 Be7 8. Bb5+ Nbd7 9. O-O O-O 10. Nc3 a6
1969 Ludwigsburg – Round ? – Zaitsev, Alexander – 1/2-1/2 – Pfleger, Helmut, Dr. – G15 1. f4 d5 2. Nf3 Nf6 3. e3 c5 4. b3 g6 5. Bb2 Bg7 6. Bb5+ Bd7 7. a4 O-O 8. O-O Nc6 9. d3 Rc8 10. Bxc6 Bxc6
1969 Sweden – Round 1 – Ekenberg, Bengt – 1/2-1/2 – Alfredsson, Ove – G68 1. f4 Nf6 2. Nf3 d5 3. e3 c5 4. b3 Nc6 5. Bb2 e6 6. Bb5 Bd7 7. O-O Bd6 8. Bxc6 Bxc6 9. Ne5 Rc8 10. d3 O-O
1971 Moscow – Round 1 – Murey, Jacob – 1-0 – Shekhtman Eduard – G214 1. f4 d5 2. Nf3 Nf6 3. e3 c5 4. b3 Nc6 5. Bb5 Bd7 6. Bb2 g6 7. Nc3 a6 8. Bxc6 Bxc6 9. Ne5 Rc8 10. Qf3 e6
1972 Skopje ol (Men) fin-A – Round 4 – Ljubojevic, Ljubomir – 1-0 – Zuidema, Coen – G362 1. f4 d5 2. Nf3 Nf6 3. e3 c5 4. b3 Nc6 5. Bb5 Bd7 6. Bb2 e6 7. O-O Be7 8. a4 O-O 9. Ne5 Nxe5 10. fxe5 Ne8

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