D24r — QGA: Bogoljubow, 7.a4 Nxc3

1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Nc3 a6 5.e4 b5 6.e5 Nd5 7.a4 Nxc3 8.bxc3 Bb7 * ○ Trait aux Blancs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

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Plans. e6 (Rupture — 82 % des parties) ; Ba3 (Fou actif (mobilité 6), Développer c1 — 5 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plans. ...f6 (Rupture — 60 % des parties) ; ...e6 (Poussée — 12 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	● c4, ● c7
Pions isolés	● a4	—
Arriérés	—	—
Chaînes	● c3→d4, d4→e5	● b5→c4, a6→b5
Passés	—	—
Majorité	—	● aile dame 4v2

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● g5 (2v0)	● d5 (2v0)
Cases faibles	—	● e5
Centre	● d4 (3v1), ● e5 (2v0)	● d5 (2v0), ● e4 (1v0)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● b	● d

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 7)
Bf1	● Bf1 Non développé (mob. 3)
Bb7		● Bb7 Actif (mob. 5)
Bf8		● Bf8 Non développé (mob. 0)
Paire de fous	● Oui	● Oui
Non développées	4 (● c1, ● f1, ● a1, ● h1)	4 (● b8, ● 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	mobile
Ruptures	● e5-e6	● …c7-c5, ● …f7-f6

Partie
1954 Mar del Plata/B.Aires zt it-17 – Round 8 – Najdorf, Miguel – 1-0 – De Souza Mendes, Joao – G5 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Nc3 a6 5. e4 b5 6. e5 Nd5 7. a4 Nxc3 8. bxc3 Bb7 9. e6 f6 10. g3 Qd5
1963 UKR Ch – Round 7 – Lazarev, Efim M. – 0-1 – Kogan, Boris M – G43 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Nc3 a6 5. e4 b5 6. e5 Nd5 7. a4 Nxc3 8. bxc3 Bb7 9. e6 fxe6 10. Bf4 Qd5
1966 Hoogovens – Round 6 – Lehmann, Heinz – 1/2-1/2 – Van Scheltinga, Theo – G30 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Nc3 a6 5. e4 b5 6. e5 Nd5 7. a4 Nxc3 8. bxc3 Bb7 9. e6 fxe6 10. Ng5 Qd6
1966 Sunderland ch-BCF – Round 2 – Littlewood, Norman – 1-0 – Milner Barry, Philip – G28 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Nc3 a6 5. e4 b5 6. e5 Nd5 7. a4 Nxc3 8. bxc3 Bb7 9. e6 fxe6 10. Be2 Qd5
1966 USSR – Round 1 – Adamson, Robby – 1-0 – Tarasov, Vitaly – G2 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Nc3 a6 5. e4 b5 6. e5 Nd5 7. a4 Nxc3 8. bxc3 Bb7 9. e6 f6 10. g3 Qd5
1967 URS Team Ch – Round 1 – Bronstein, David I – 1-0 – Chikovani, Iuri – G8 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Nc3 a6 5. e4 b5 6. e5 Nd5 7. a4 Nxc3 8. bxc3 Bb7 9. e6 fxe6 10. Ng5 Qd5
1967 USSR – Round 1 – Doroshkievich, Vladimir K – 1-0 – Astashin, Aleksandr – G11 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Nc3 a6 5. e4 b5 6. e5 Nd5 7. a4 Nxc3 8. bxc3 Bb7 9. e6 fxe6 10. Be2 Qd5
1968 ROM Ch – Round 5 – Vaisman, Volodia – 0-1 – Ungureanu, Emil – G26 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Nc3 a6 5. e4 b5 6. e5 Nd5 7. a4 Nxc3 8. bxc3 Bb7 9. e6 f6 10. Be2 g6

D24r — QGA: Bogoljubow (1954)

1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Nc3 a6 5.e4 b5 6.e5 Nd5 7.a4 Nxc3 8.bxc3 Bb7

Les coups candidats

9.e6 — 82.4% (178 parties)

Ambassadeurs : Schulz, Klaus-Juergen (5x), Valenta, Vit (4x), Ilyin, Pavel Egorovich (4x), Sosonko, Gennadi (3x), Bronstein, David I (2x), Miles, Anthony J (2x), Johansen, Darryl K (2x), Krueger, Erich (2x)

9.Ba3 — 4.6% (10 parties)

Ambassadeurs : Sallay, Roland (1x), Sapi, Laszlo (1x), Bjerke, Richard (1x), Valaker, Ole Johan (1x), Gola, Martin (1x), Gawronski, Miroslaw (1x), Dive, Russell John (1x), Dreyer, Martin P (1x)

9.g3 — 4.6% (10 parties)

Ambassadeurs : Putzbach, Gerd (2x), Toshkov, Tihomir (1x), Dimitriadis, Georgios (1x), Benjamin, Jonathan C (1x), Wheldon, Philip (1x), Tunik, Gennady (1x), Lutikov, Anatoly S (1x), Dinckel, Joerg (1x)

9.Be2 — 4.2% (9 parties)

Ambassadeurs : Korhonen, Aki (1x), Flohrer, Reinhard (1x), Draica, Iulia (1x), Matnadze Bujiashvili, Ann (1x), Pedersen, Steffen (1x), Stefansson, Hannes (1x), Bacrot, Etienne (1x), Serper, Grigory (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	9.e6	9.Ba3	9.g3	9.Be2
<1800	3	100%	—	—	—
1800-2200	49	82%	4%	6%	6%
2200-2600	115	80%	5%	5%	3%

Évolution par décennie (% des parties)

Décennie	N parties	9.e6	9.Ba3	9.g3	9.Be2
1950s	2	100%	—	—	—
1960s	17	94%	6%	—	—
1970s	9	89%	—	—	—
1980s	37	81%	—	8%	3%
1990s	52	81%	6%	8%	4%
2000s	56	79%	5%	5%	9%
2010s	37	86%	5%	—	3%
2020s	6	67%	17%	—	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
9.e6	86%	67%	▼ -19.8%
9.Ba3	5%	17%	▲ +11.3%
9.g3	0%	0%	+0.0%
9.Be2	3%	0%	▼ -2.7%

Parties historiques

9.e6 — 82.4% (178 parties)

1952 — Bronstein, David I vs Byrne, Robert E — 0-1 — Helsinki olm
1954 — Miguel, Nahuel vs De Souza Mendes, Joao — 1-0 — Mar del Plata/Buenos Aires
1963 — Lazarev, Efim M. vs Kogan, Boris M — 0-1 — Kiev UKR
1964 — Borisenko, Georgy K vs Stein, Leonid — 0-1 — Moscow RUS
1964 — Borisenko, Aleksei V vs Stein Septiano Malewa Kleden — 0-1 — USSR

9.Ba3 — 4.6% (10 parties)

1965 — Sallay, Roland vs Sapi, Laszlo — 1/2-1/2 — Budapest HUN
1991 — Dive, Russell John vs Dreyer, Martin P — 1/2-1/2 — Otago
1992 — Bjerke, Richard vs Valaker, Ole Johan — 0-1 — Gausdal NOR
1998 — Gola, Martin vs Gawronski, Miroslaw — 0-1 — POL-chT2 Wisla
2000 — Sitnik, Igor vs Vaculik, Martin — 1-0 — 21. Open A Bled SLO

9.g3 — 4.6% (10 parties)

1984 — Toshkov, Tihomir vs Dimitriadis, Georgios — 0-1 — Athens GRE
1984 — Tunik, Gennady vs Lutikov, Anatoly S — 1-0 — Briansk
1987 — Benjamin, Jonathan C vs Wheldon, Philip — 0-1 — London ENG
1992 — Doeppner, Tilo vs Putzbach, Gerd — 0-1 — Oberliga Nord N9192
1993 — Dinckel, Joerg vs Putzbach, Gerd — 0-1 — Pinneberg

9.Be2 — 4.2% (9 parties)

1985 — Korhonen, Aki vs Flohrer, Reinhard — 1-0 — corr EU/I
1992 — Pedersen, Steffen vs Stefansson, Hannes — 0-1 — Arnold Cup Gausdal NOR
1994 — Draica, Iulia vs Matnadze Bujiashvili, Ann — 0-1 — Herculane ch-EUw U12
2000 — Bacrot, Etienne vs Serper, Grigory — 1/2-1/2 — Cap d'Agde FRA
2000 — Komljenovic, Davorin vs Cifuentes Parada, Roberto — 0-1 — Dos Hermanas ESP