A56s — Benoni: Czech, 5.e4 Be7 6.g3 O-O 7.Bg2

1.d4 Nf6 2.c4 c5 3.d5 e5 4.Nc3 d6 5.e4 Be7 6.g3 O-O 7.Bg2 * ● Trait aux Noirs

Ouverture — Centre fermé

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Avantages : case forte e4, case forte b5, case forte d5, paire de fous.
Faiblesses adverses : arriéré d6, Be7 enfermé, Bc8 enfermé.
Problèmes : roi au centre, Bc1 enfermé, arriéré f2, 4 pièces non développées (G1, C1, A1, H1).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● Nf3 — Développer Ng1
● Bg5 — Clouer Nf6

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Avantages : case forte d4, case forte g4, paire de fous.
Faiblesses adverses : arriéré f2, Bc1 enfermé, roi blanc au centre.
Problèmes : Be7 enfermé, Bc8 enfermé, arriéré d6, 3 pièces non développées (B8, C8, A8).
Plans :
● ...Nbd7 — Développer Nb8
● ...Bf5 — Développer Bc8

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

A56s — Czech

1.d4 Nf6 2.c4 c5 3.d5 e5 4.Nc3 d6 5.e4 Be7 6.g3 O-O 7.Bg2

Eval: [+1.10]

Les coups candidats

7…Ne8 — 54.3% (573 parties) →

Ambassadeurs : Liublinsky, Victor (9x), Veinger, Itzhak (8x), Manolov, Ivan (7x), Miles, Anthony J (6x), Kristol, Luba (6x), Seirawan, Yasser (5x), Yukhtman, Yakov (4x), Hort, Vlastimil (4x)

7…Nbd7 — 20.7% (219 parties)

Ambassadeurs : Ivkov, Borislav (5x), Ost-Hansen, Jacob (5x), Nývlt, Zdenek (5x), Forintos, Gyozo V (4x), Brusiani, Angelo (3x), Wlodarczyk, Oskar (3x), Bellin, Jana M (3x), Hort, Vlastimil (2x)

7…Na6 — 11.6% (123 parties)

Ambassadeurs : Veinger, Itzhak (5x), Oganisian, Roman (3x), Johansson, Jan 1964 (2x), Maric, Alisa (2x), Maksimovic, Suzana (2x), Honfi, K. (2x), Sek, Zbigniew (2x), Kaspi, Alexander (2x)

7…a6 — 11.0% (116 parties)

Ambassadeurs : Ciocaltea, Victor (4x), Panov, Vasily (2x), Janosevic, Dragoljub (2x), Kushnir, Alla (2x), Korchnoi, Viktor (2x), Udovcic, Mijo (2x), Kristjansson, Bragi (2x), Ahlers, Kai (2x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	7…Ne8	7…Nbd7	7…Na6	7…a6
<1800	9	56%	22%	11%	—
1800-2200	258	48%	22%	11%	14%
2200-2600	559	54%	21%	13%	10%
2600+	11	55%	36%	9%	—

Évolution par décennie (% des parties)

Décennie	N parties	7…Ne8	7…Nbd7	7…Na6	7…a6
1920s	1	100%	—	—	—
1930s	2	50%	—	50%	—
1940s	14	86%	—	—	14%
1950s	17	65%	6%	6%	12%
1960s	53	64%	11%	11%	13%
1970s	71	49%	30%	4%	17%
1980s	97	64%	16%	12%	6%
1990s	207	60%	14%	15%	8%
2000s	256	52%	25%	12%	10%
2010s	308	48%	25%	10%	13%
2020s	30	43%	17%	23%	17%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
7…Ne8	48%	43%	▼ -4.4%
7…Nbd7	25%	17%	▼ -8.3%
7…Na6	10%	23%	▲ +13.3%
7…a6	13%	17%	▲ +3.7%

Joueurs célèbres

Champions du monde dans cette position

Karpov, Aleksandr — 1 partie
Ju, Wenjun — 1 partie

Parties historiques

7…Ne8 — 54.3% (573 parties)

1922 — Becker, Albert vs Gruenfeld, Ernst — 1-0 — Vienna AUT
1939 — Grau, Roberto G vs Czerniak, Magdalena — 1/2-1/2 — Buenos Aires ARG
1941 — Stahlberg, Gideon vs Michel, Paul — 1-0 — Buenos Aires ARG
1941 — Stahlberg, Gideon vs Acebey Michel, Veroska — 1-0 — Buenos Aires ARG
1945 — Poliak, Abram vs Simagin, Vladimir — 1-0 — Moscow RUS

7…Nbd7 — 20.7% (219 parties)

1952 — Cruz, Walter vs Engels, Ludwig — 0-1 — Rio de Janeiro BRA
1961 — Suetin, Alexey S vs Vatnikov, Josif E — 0-1 — Sochi RUS
1968 — Trincardi, Tullio vs Ghitescu, Theodor — 0-1 — Reggio Emilia ITA
1968 — Hort, Vlastimil vs Ciocaltea, Victor — 1-0 — Athens GRE
1968 — Bukic, Enver vs Janosevic, Dragoljub — 1/2-1/2 — Cateske Toplice

7…Na6 — 11.6% (123 parties)

1939 — Winter, William vs Gilchrist, Jeff — 1-0 — Aberdeen SCO
1958 — Paroulek, Vit vs Honfi, Karoly — 1-0 — CCOL3 fin-03 5861
1964 — Liptay, Laszlo Dr. vs Szilagyi, Peter — 0-1 — Budapest HUN
1965 — Shatskes, Boris A vs Sergievsky, Vladimir D — 0-1 — ?
1966 — Kluger, Gyula vs Kurtesch Laszlo — 1-0 — Budapest HUN

7…a6 — 11.0% (116 parties)

1940 — Petrov, Vladimir S. vs Panov, Vasily — 1/2-1/2 — Moscow RUS
1940 — Petrov, Vladimirs vs Panov, Vasily — 1/2-1/2 — Ch URS, Moscow RUS
1957 — Korchnoi, Viktor vs Udovcic, Mijo — 1-0 — Match \ Leningrad RUS
1957 — Korchnoi, Viktor vs Udovcic, Mijo — 1-0 — Leningrad RUS
1960 — Furman, Semyon vs Kotov, Alexander — 1-0 — Odessa UKR

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	● f2	● d6
Chaînes	● f2→g3, h2→g3, c4→d5, e4→d5	● d6→c5, d6→e5
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● e4 (2v1), ● b5 (2v0), ● d5 (4v1)	● d4 (2v1), ● g4 (2v1)
Cases faibles	—	—
Centre	● d5 (4v1), ● e4 (2v1)	● d4 (2v1), ● e5 (1v0)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bg2	● Bg2 Ok (mob. 3)
Be7		● Be7 Enfermé (mob. 0)
Bc8		● Bc8 Non développé (mob. 5)
Paire de fous	● Oui	● Oui
Non développées	4 (g1, c1, a1, h1)	3 (b8, c8, a8)

Sécurité du roi

	♔ Blancs	♚ Noirs
Statut	● Au centre !	● Roqué
Droits de roque	O-O / O-O-O	—

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	fermé
Ruptures	● f2-f3	—

Partie
1927 London Olympiad 1st – Round 11.22 – Gilg, Karl – 1-0 – Yates, Frederic D – G116 1. d4 e6 2. c4 c5 3. d5 Nf6 4. Nc3 d6 5. g3 Be7 6. Bg2 O-O 7. e4 e5 8. Nge2 Ne8 9. O-O Kh8 10. Qd3 Nd7
1939 SCO-ch52/ – Round 5 – Winter, William – 1-0 – Gilchrist, Jeff – G9 1. d4 Nf6 2. c4 c5 3. d5 d6 4. g3 e5 5. Bg2 Be7 6. Nc3 O-O 7. e4 Na6 8. Nge2 Nc7 9. O-O Nd7 10. f4 f6
1940 URS-ch12 – Round ? – Petrov, Vladimir S. – 1/2-1/2 – Panov, Vasily – G15 1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. g3 Be7 6. Bg2 O-O 7. e4 a6 8. Nge2 Ne8 9. O-O Nd7 10. Qc2 Rb8
1952 Rio de Janeiro – Round 13 – Cruz, Walter – 0-1 – Engels, Ludwig – G72 1. d4 c5 2. d5 e5 3. c4 d6 4. e4 Nf6 5. Nc3 Be7 6. g3 O-O 7. Bg2 Nbd7 8. Nge2 a6 9. O-O Rb8 10. Qd3 Ne8
1957 Leningrad – Round 6 – Korchnoi, Viktor – 1-0 – Udovcic, Mijo – G45 1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 Be7 6. g3 O-O 7. Bg2 a6 8. a4 Ne8 9. Nge2 Nd7 10. O-O Rb8
1964 Budapest Ch – Round 1 – Liptay, Laszlo Dr. – 0-1 – Szilagyi, Peter – G13 1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 Be7 6. g3 O-O 7. Bg2 Na6 8. Nh3 Bg4 9. f3 Bd7 10. O-O Qc8
1964 Budapest Ch – Round 1 – Liptay, Laszlo Dr. – 1/2-1/2 – Gasztonyi, Endre – G14 1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 Be7 6. g3 O-O 7. Bg2 a6 8. a4 Ne8 9. Nh3 b6 10. O-O Bd7
1966 Budapest Ch – Round 11 – Kluger, Gyula – 1-0 – Kurtesch Laszlo – G14 1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 Be7 6. g3 O-O 7. Bg2 Na6 8. f4 exf4 9. gxf4 Ng4 10. Nf3 Bh4+
1967 EU Ch U18 f-A 6768 – Round 5 – Ligterink, Gert – 0-1 – Levy, David N L – G9 1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 Be7 6. g3 O-O 7. Bg2 Na6 8. Nge2 Nc7 9. a4 b6 10. O-O Rb8
1967 Sarajevo – Round 15 – Benko, Pal – 1-0 – Janosevic, Dragoljub – G82 1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 Be7 6. g3 O-O 7. Bg2 a6 8. a4 Nbd7 9. Nge2 Ne8 10. O-O Rb8
1967 Skopje – Round 13 – Bukic, Enver – 1-0 – Janosevic, Dragoljub – G100 1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 Be7 6. g3 O-O 7. Bg2 a6 8. Nge2 Nbd7 9. O-O Rb8 10. a4 Ne8
1968 Athens – Round 1 – Hort, Vlastimil – 1-0 – Ciocaltea, Victor – G3 1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 Be7 6. g3 O-O 7. Bg2 Nbd7 8. Nf3 a6 9. a4 Ne8 10. O-O g6
1968 Belgrade (Women) 4th – Round 8 – Kushnir, Alla – 1-0 – Markovic Milinko – G29 1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 Be7 6. g3 O-O 7. Bg2 a6 8. Nge2 Ne8 9. O-O g6 10. Bh6 Ng7
1968 Reggio Emilia – Round 8 – Trincardi, Tullio – 0-1 – Ghitescu, Theodor – G10 1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. g3 Be7 6. Bg2 O-O 7. e4 Nbd7 8. Nge2 Ne8 9. O-O g6 10. Bh6 Ng7
1968 YUG Ch 23th – Round 14 – Bukic, Enver – 1/2-1/2 – Janosevic, Dragoljub – G72 1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 Be7 6. g3 O-O 7. Bg2 Nbd7 8. Nge2 Ne8 9. O-O g6 10. Be3 Ng7
1968 Yugoslavia – Round 1 – Kushnir, Alla – 1-0 – Markovic, Gordana NN – G5 1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 Be7 6. g3 O-O 7. Bg2 a6 8. Nge2 Ne8 9. O-O g6 10. Bh6 Ng7
1969 Luhacovice – Round 14 – Korchnoi, Viktor – 1-0 – Plachetka, Jan – G99 1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 Be7 6. g3 O-O 7. Bg2 Nbd7 8. Qe2 a6 9. a4 b6 10. Kd1 Ne8
TCh-RUS 2008 – Round 1 – Iljushin, Alexei – 1/2-1/2 – Ni, Hua – G9 1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 Be7 6. g3 O-O 7. Bg2 Nbd7 8. Nge2 Ne8 9. O-O g6 10. Bh6 Ng7

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