D34f — QGD Tarrasch: 9.Bf4

1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O O-O 9.Bf4 * ● Trait aux Noirs

Ouverture — Centre fermé

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Avantages : majorité centre (2v1), case forte e5, case forte g5, avant-poste f4(F), Bf4 actif, paire de fous, colonne c.
Faiblesses adverses : Be7 enfermé, Bc8 enfermé.
Problèmes : Bg2 enfermé.
Plans :
● h3 — Empêcher ...Bg4
● Rc — Tour sur colonne c

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Avantages : majorité aile_dame (3v2), case forte b4, case forte e4, case forte g4, case forte d5, paire de fous, colonne e.
Faiblesses adverses : Bg2 enfermé.
Problèmes : Be7 enfermé, Bc8 enfermé.
Plans :
● ...Bg4 — Développer Bc8, clouer Nf3
● ...c4 — Rupture
● ...Re — Tour sur colonne e

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

D34f —

1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O O-O 9.Bf4

Eval: [+0.20]

Les coups candidats

9…Be6 — 21.8% (150 parties)

Ambassadeurs : Schweber, Samuel (3x), Naumkin, Igor (3x), Chekhover, Vitaly (2x), Langeweg, Kick (2x), Flear, Christine (2x), Kiraly, Istvan (2x), Radomsky, Viacheslav G (2x), Macek, Vlasta (2x)

9…Bg4 — 21.4% (147 parties)

Ambassadeurs : Razuvaev, Yuri S (3x), Verduga Zavala, Denis (2x), Zolnierowicz, Krzysztof (2x), Hamann, Sven (2x), Wahjuwidajat, Utut Adianto (2x), Dimukhametov, Artur (2x), Ragozin, Viacheslav (1x), Yudovich, Mikhail sr (1x)

9…c4 — 19.5% (134 parties)

Ambassadeurs : Naumkin, Igor (7x), Lida Garcia, Fernando (3x), Reides, Marcelo (3x), De Jong, Peter (2x), Razuvaev, Yuri S (2x), Mozny, Milos (2x), Visser, Dirk (2x), Naoum, Spyridon (2x)

9…a6 — 11.9% (82 parties)

Ambassadeurs : Bukal, Vladimir Jr. (1x), Pernisco, Ermanno (1x), Al Ferri, Abdulkhader (1x), Groffen, Hans (1x), Root, Alexey (1x), Burke, Paul (1x), Caetano Netto, Joaquim Gentil (1x), Toth, Peter (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	9…Be6	9…Bg4	9…c4	9…a6
<1800	22	9%	14%	23%	18%
1800-2200	254	20%	21%	21%	18%
2200-2600	280	20%	26%	23%	9%
2600+	2	50%	50%	—	—

Évolution par décennie (% des parties)

Décennie	N parties	9…Be6	9…Bg4	9…c4	9…a6
1910s	1	—	—	—	—
1930s	2	—	—	—	—
1940s	4	25%	25%	—	—
1950s	11	36%	—	9%	—
1960s	25	44%	4%	4%	—
1970s	25	20%	8%	8%	4%
1980s	48	33%	29%	6%	6%
1990s	123	20%	31%	14%	12%
2000s	162	23%	25%	15%	14%
2010s	237	17%	18%	30%	14%
2020s	50	20%	18%	30%	16%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
9…Be6	17%	20%	▲ +2.7%
9…Bg4	18%	18%	+0.3%
9…c4	30%	30%	+0.5%
9…a6	14%	16%	▲ +2.5%

Parties historiques

9…Be6 — 21.8% (150 parties)

1949 — Moiseev, Oleg vs Bonch-Osmolovsky, Mikhail — 1-0 — Moscow RUS
1954 — Ragozin, Viacheslav vs Chekhover, Vitaly — 1-0 — URS-ch sf Leningrad RUS
1954 — Shcherbakov, Vitaly vs Chekhover, Vitaly — 1-0 — Leningrad ch22-SU sf
1958 — Green, Arnold Yorwarth vs Lemvig-Fog, Malte — 1/2-1/2 — Hastings ENG
1959 — Ilivitsky, Georgy A vs Grushevsky, Alexander — 1-0 — Frunze KGZ

9…Bg4 — 21.4% (147 parties)

1942 — Ragozin, Viacheslav vs Yudovich, Mikhail sr — 1-0 — Moscow RUS
1969 — Ghitescu, Theodor vs Stanciu, Traian — 1/2-1/2 — Bucharest ROU
1974 — Matera, Salvatore vs Nunn, John D M — 1/2-1/2 — Teesside ENG
1974 — Masic, Ljubomir vs Raicevic, Vladimir — 0-1 — Sombor
1980 — Frias Garcia, Valeria vs Gligoric, Sofija — 0-1 — Lone Pine, CA USA

9…c4 — 19.5% (134 parties)

1959 — Petrosian, Tigran A. vs Aronin, Lev — 1/2-1/2 — Moscow RUS
1969 — Moiseev, Oleg vs Yudovich, Mikhail Jr — 1-0 — Svetlogorsk
1976 — Barth, Rainer vs Mueller, Klaus Uwe — 1/2-1/2 — Spremberg
1977 — Petrosian, Arshak B vs Liavdansky, Vladimir — 1-0 — Kiev tt
1980 — Shestakov, Sergei S vs Fedorov, Vladislav — 1-0 — Volgograd RUS

9…a6 — 11.9% (82 parties)

1971 — Al Ferri, Abdulkhader vs Groffen, Hans — 1-0 — corr Italy
1984 — Root, Alexey vs Burke, Paul — 0-1 — Vancouver
1984 — Caetano Netto, Joaquim Gentil vs Toth, Peter — 1/2-1/2 — BRA-ch 51th Cabo Frio
1989 — Bukal, Vladimir Jr. vs Pernisco, Ermanno — 1/2-1/2 — Mendrisio SUI
1990 — Daniel Fano vs Garcia Perez, Juan Carlos — 1/2-1/2 — ESP

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→g3, h2→g3	—
Passés	—	—
Majorité	● centre 2v1	● aile_dame 3v2

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● e5 (3v1), ● g5 (2v0)	● b4 (2v0), ● e4 (2v1), ● g4 (2v0), ● d5 (2v1)
Cases faibles	● d4	—
Centre	● e5 (3v1)	● d5 (2v1), ● e4 (2v1)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● c	● e

Pièces

	♔ Blancs	♚ Noirs
Bg2	● Bg2 Enfermé (mob. 2)
Bf4	● Bf4 Actif (mob. 9)
Be7		● Be7 Enfermé (mob. 1)
Bc8		● Bc8 Non développé (mob. 5)
Paire de fous	● Oui	● Oui
Non développées	1 (a1)	2 (c8, a8)

Sécurité du roi

	♔ Blancs	♚ Noirs
Statut	● Roqué	● Roqué
Droits de roque	—	—

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	fermé
Ruptures	—	● …c5-c4

Partie
1936 New York ch-USA – Round 11 – Kupchik, Abraham – 1-0 – Denker, Arnold S – G31 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 c5 5. cxd5 exd5 6. g3 Nc6 7. Bg2 Be7 8. O-O O-O 9. Bf4 Bf5 10. dxc5 d4
1942 Moscow – Round 1 – Ragozin, Viacheslav – 1-0 – Yudovich, Mikhail sr – G1 1. c4 Nf6 2. Nf3 e6 3. g3 d5 4. Bg2 Be7 5. O-O O-O 6. d4 c5 7. cxd5 exd5 8. Nc3 Nc6 9. Bf4 Bg4 10. dxc5 Bxc5
1944 La Plata Jockey Club – Round 16 – Iliesco, Juan – 1/2-1/2 – Michel, Paul – G75 1. c4 e6 2. Nf3 d5 3. g3 c5 4. Bg2 Nc6 5. cxd5 exd5 6. d4 Nf6 7. O-O Be7 8. Nc3 O-O 9. Bf4 Ne4 10. Rc1 Nxc3
1949 URS Ch, semi final – Round 1 – Fridstein, German – 1-0 – Bonch-Osmolovsky, Mikhail – G12 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bf4 Bf5 10. Rc1 Rc8
1949 URS Ch, semi final – Round 1 – Moiseev, Oleg – 1-0 – Bonch-Osmolovsky, Mikhail – G13 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bf4 Be6 10. dxc5 Bxc5
1950 Southsea – Round 5 – Golombek, Harry – 1/2-1/2 – Barden, Leonard – G25 1. d4 d5 2. c4 e6 3. g3 Nf6 4. Bg2 Be7 5. Nf3 O-O 6. O-O c5 7. cxd5 exd5 8. Nc3 Nc6 9. Bf4 Bf5 10. Rc1 b6
1954 Leningrad ch22-SU sf – Round 18 – Shcherbakov, Vitaly – 1-0 – Chekhover, Vitaly – G56 1. Nf3 d5 2. c4 e6 3. g3 Nf6 4. Bg2 c5 5. O-O Nc6 6. cxd5 exd5 7. d4 Be7 8. Nc3 O-O 9. Bf4 Be6 10. dxc5 Bxc5
1954 URS Ch sf Leningrad RUS – Round 13 – Ragozin, Viacheslav – 1-0 – Chekhover, Vitaly – G18 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 c5 5. O-O Nc6 6. cxd5 exd5 7. d4 Be7 8. Nc3 O-O 9. Bf4 Be6 10. dxc5 Bxc5
1955 Moscow m – Round 6 – Kan, Ilya A – 1-0 – Khachaturov, Andrey Andreevich – G6 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bf4 Bf5 10. Rc1 c4
1955 Moscow m – Round 7 – Kan, Ilya A – 1-0 – Khachaturov, Andrey Andreevich – G7 1. d4 d5 2. Nf3 e6 3. c4 c5 4. cxd5 exd5 5. Nc3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bf4 Bf5 10. Rc1 c4
1956 Candidats Tournament – Round 10 – Petrosian, Tigran V – 1/2-1/2 – Geller, Efim P – G43 1. c4 c5 2. g3 Nc6 3. Bg2 Nf6 4. Nf3 e6 5. O-O d5 6. cxd5 exd5 7. d4 Be7 8. Nc3 O-O 9. Bf4 cxd4 10. Nxd4 Qb6
1958 Munich olm fin-A – Round 1 – Neikirkh, Oleg – 0-1 – Dueckstein, Andreas – G1 1. c4 e6 2. Nc3 d5 3. d4 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bf4 Bf5 10. Rc1 c4
1958 WchT U26 fin-A 05th – Round 2 – Juettler Helmut – 1-0 – Emma, Jaime – G13 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bf4 Bf5 10. Rc1 c4
1959 URS Team Ch – Round 1 – Petrosian, Tigran A. – 1/2-1/2 – Aronin, Lev – G16 1. d4 d5 2. Nf3 c5 3. c4 e6 4. cxd5 exd5 5. g3 Nc6 6. Bg2 Nf6 7. O-O Be7 8. Nc3 O-O 9. Bf4 c4 10. Ne5 Be6
1960 Buenos Aires ch-ARG – Round 4 – Bolbochan, J. – 1-0 – Bielicki, Carlos – G23 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 Nc6 5. Bg2 Be7 6. O-O d5 7. cxd5 exd5 8. d4 O-O 9. Bf4 Bf5 10. Rc1 c4
1962 Budapest-Warsaw m – Round ? – Varnusz, Egon – 1-0 – Sztejn – G12 1. d4 e6 2. c4 Nf6 3. Nc3 d5 4. Nf3 c5 5. cxd5 exd5 6. g3 Nc6 7. Bg2 Be7 8. O-O O-O 9. Bf4 Ne4 10. Rc1 Be6
1962 Candidats Tournament – Round 10 – Kortchnoi, V. – 1/2-1/2 – Keres, P. – G34 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 Nc6 5. Bg2 d5 6. cxd5 exd5 7. d4 Be7 8. O-O O-O 9. Bf4 Be6 10. Rc1 Rc8
1963 Ch (Men) Budapest HUN – Round 1 – Forintos, Gyozo V – 1/2-1/2 – Szabo, Ladislav – G1 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 Nc6 5. Bg2 d5 6. cxd5 exd5 7. d4 Be7 8. O-O O-O 9. Bf4 Bf5 10. h3 Rc8
1964 Tel Aviv olm fin-A – Round 5 – Schweber, Samuel – 1/2-1/2 – Langeweg, Kick – G99 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bf4 Be6 10. dxc5 Bxc5
1965 WchT U26 12. fin-A – Round 7 – Nacu, Miron – 1/2-1/2 – Janata, Michael – G42 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 exd5 6. g3 Nc6 7. Bg2 Be7 8. O-O O-O 9. Bf4 Bf5 10. dxc5 Bxc5
1966 Panamerican – Round ? – Schweber, Samuel – 1-0 – Roux Cabral, Fausto – G61 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 exd5 6. g3 Nc6 7. Bg2 Be7 8. O-O O-O 9. Bf4 Be6 10. dxc5 Bxc5
1966 WchT U26 fin-A 13th – Round 9 – Cebalo, Miso – 1/2-1/2 – Kolbak, Jens – G11 1. d4 d5 2. Nf3 c5 3. g3 Nc6 4. Bg2 Nf6 5. O-O e6 6. c4 Be7 7. Nc3 O-O 8. cxd5 exd5 9. Bf4 cxd4 10. Nxd4 Qb6
1967 Halle zt – Round 1 – Zwaig, Arne – 1-0 – Kinnmark, Ove – G6 1. Nf3 Nf6 2. g3 e6 3. Bg2 Be7 4. O-O O-O 5. c4 d5 6. d4 c5 7. cxd5 exd5 8. Nc3 Nc6 9. Bf4 Bf5 10. dxc5 Bxc5
GCT Blitz Paris 2019 – Round 11.3 – Vachier-Lagrave, Maxime – 1/2-1/2 – Grischuk, Alexander – G53 1. Nf3 Nf6 2. g3 c5 3. c4 Nc6 4. Nc3 e6 5. Bg2 d5 6. cxd5 exd5 7. d4 Be7 8. O-O O-O 9. Bf4 Bg4 10. dxc5 Bxc5

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