A87m — Dutch: Leningrad, Main Line, 7.b3 c6

1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3 O-O 6.O-O d6 7.b3 c6 * ○ Trait aux Blancs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

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Plans. Bb2 (Fianchetto, fou sur la grande diagonale — 91 % des parties) ; Nc3 (Développer b1 — 5 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

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Plans. ...Na6 (Développer b8 — 31 % des parties) ; ...a5 (17 % des parties) ; ...Qc7 (17 % des parties) ; ...Qe8 (10 % des parties) ; ...Ne4 (Cavalier centralisé en e4 — 6 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● a2→b3, f2→g3, h2→g3, b3→c4	● g6→f5, b7→c6, e7→d6, h7→g6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● f4 (2v0), ● g5 (2v0)	● e4 (2v0), ● g4 (2v0)
Cases faibles	—	—
Centre	● d4 (2v0), ● e5 (2v1)	● d5 (2v1), ● e4 (2v0)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 7)
Bg2	● Bg2 Ok (mob. 2)
Bg7		● Bg7 Ok (mob. 2)
Bc8		● Bc8 Non développé (mob. 2)
Paire de fous	● Oui	● Oui
Non développées	3 (● b1, ● c1, ● a1)	3 (● b8, ● c8, ● a8)

Sécurité du roi

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

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	mobile
Ruptures	● c4-c5, ● d4-d5, ● e2-e4	● …c6-c5, ● …d6-d5, ● …e7-e5, ● …f5-f4

Partie
1967 Reggio Emilia 6768 10th – Round 11 – Trincardi, Tullio – 0-1 – Saidy, Anthony – G38 1. d4 f5 2. c4 Nf6 3. Nf3 g6 4. g3 Bg7 5. Bg2 O-O 6. O-O d6 7. b3 c6 8. Bb2 Na6 9. Nbd2 Rb8 10. Qc2 Kh8
1969 Raach zt – Round 6 – Hartoch, Robert G – 1/2-1/2 – Zwaig, Arne – G61 1. c4 f5 2. Nf3 Nf6 3. g3 g6 4. Bg2 Bg7 5. O-O O-O 6. d4 d6 7. b3 c6 8. Bb2 Ne4 9. Nbd2 d5 10. Qc2 Be6
Jakarta / Yogya / Bali 1983 – Round 16 – Portisch, Lajos – 1-0 – Kovacevic, Veljko – G49 1. c4 f5 2. d4 Nf6 3. g3 d6 4. Nf3 g6 5. b3 Bg7 6. Bg2 O-O 7. O-O c6 8. Bb2 a5 9. Nc3 Na6 10. Rc1 Bd7

A87m — Leningrad, Main Line (1967)

1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3 O-O 6.O-O d6 7.b3 c6

Les coups candidats

8.Bb2 — 90.7% (284 parties)

Ambassadeurs : Krause, Ullrich (2x), Lezcano Jaen, Pedro (2x), Timmerman, Gert (2x), Ditt, Egon (2x), Tennstedt, Andreas, Dr. (2x), Umezinwa, George (2x), Kopecek, Ivan (2x), Toran Albero, Roman (1x)

8.Nc3 — 4.8% (15 parties) →

Ambassadeurs : Franolic, Dubravko (1x), Larsen, Bent (1x), Nowak, Ignacy (1x), Wach, Slawomir (1x), Farago, Sandor (1x), Dengel, Joerg (1x), Schuster, Juergen (1x), Rustamov, Bakhtiyar (1x)

8.Nbd2 — 1.9% (6 parties)

Ambassadeurs : Donchenko, Anatoly (1x), Orlov, Georgi (1x), Martinovic, Sasa (1x), Biliskov, Vjekoslav (1x), Loginova, Lubov (1x), Kreminsky, Alexander (1x), Holton, Jake (1x), Almazedi, Firas (1x)

8.Qc2 — 1.3% (4 parties)

Ambassadeurs : Perman, Torvald (1x), Walta, Paivi (1x), Zhao, Art (1x), James, Charles (1x), Burnett, Jim (1x), Rendle, Thomas E (1x), Wang, Jeff (1x), Liu, Lambert (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	8.Bb2	8.Nc3	8.Nbd2	8.Qc2
<1800	13	85%	—	8%	8%
1800-2200	132	92%	5%	2%	2%
2200-2600	135	91%	5%	1%	1%

Évolution par décennie (% des parties)

Décennie	N parties	8.Bb2	8.Nc3	8.Nbd2	8.Qc2
1950s	1	—	100%	—	—
1960s	4	100%	—	—	—
1970s	9	89%	11%	—	—
1980s	21	95%	—	5%	—
1990s	91	93%	4%	—	1%
2000s	63	87%	8%	2%	—
2010s	104	91%	2%	3%	3%
2020s	20	85%	10%	5%	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
8.Bb2	91%	85%	▼ -6.3%
8.Nc3	2%	10%	▲ +8.1%
8.Nbd2	3%	5%	▲ +2.1%
8.Qc2	3%	0%	▼ -2.9%

Parties historiques

8.Bb2 — 90.7% (284 parties)

1967 — Trincardi, Tullio vs Saidy, Anthony — 0-1 — Reggio Emilia ITA
1968 — Toran Albero, Roman vs Janetschek, Karl — 1-0 — Bad Aibling GER
1968 — Glatman, Victor vs Yudovich, Mikhail Jr — 0-1 — USSR
1969 — Hartoch, Robert G vs Zwaig, Arne — 1/2-1/2 — Raach
1970 — Joukl, Zdenek vs Sikora-Lerch, Jan — 1/2-1/2 — Harrachov

8.Nc3 — 4.8% (15 parties)

1955 — Franolic, Dubravko vs Larsen, Bent — 0-1 — Zagreb Young Masters
1979 — Nowak, Ignacy vs Wach, Slawomir — 1/2-1/2 — Warszawa Cup5-B op
1993 — Farago, Sandor vs Dengel, Joerg — 1-0 — Budapest HUN
1993 — Sokolov, Albert vs Wohlfahrt, Herbert — 1-0 — Lublin POL
1994 — Schuster, Juergen vs Rustamov, Bakhtiyar — 1-0 — corr Tch10-SU

8.Nbd2 — 1.9% (6 parties)

1989 — Donchenko, Anatoly vs Orlov, Georgi — 1/2-1/2 — Belgorod open
2001 — Martinovic, Sasa vs Biliskov, Vjekoslav — 0-1 — Zadar CRO
2011 — Loginova, Lubov vs Kreminsky, Alexander — 0-1 — Novosibirsk RUS
2014 — Holton, Jake vs Almazedi, Firas — 1-0 — High Wycombe
2018 — Jandke, Manfred vs Pacher, Simon — 1-0 — Feffernitz AUT

8.Qc2 — 1.3% (4 parties)

1997 — Perman, Torvald vs Walta, Paivi — 1-0 — Vantaa,FIN
2012 — Zhao, Art vs James, Charles — 1-0 — San Francisco, CA USA
2012 — Burnett, Jim vs Rendle, Thomas E — 0-1 — Barcelo Hotel, Hinckley Island
2017 — Wang, Jeff vs Liu, Lambert — 1/2-1/2 — Sault Ste Marie CAN

1967 Reggio Emilia 6768 10th – Round 11 – Trincardi, Tullio – 0-1 – Saidy, Anthony – G38

1969 Raach zt – Round 6 – Hartoch, Robert G – 1/2-1/2 – Zwaig, Arne – G61

Jakarta / Yogya / Bali 1983 – Round 16 – Portisch, Lajos – 1-0 – Kovacevic, Veljko – G49