A99h — Dutch: Ilyin-Zhenevsky, 8.b3 a5 9.Ba3

1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d6 7.Nc3 Qe8 8.b3 a5 9.Ba3 * ● Trait aux Noirs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

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Plans. Re1 (27 % des parties) ; Rc1 (20 % des parties) ; e3 (Solidifier le centre — 18 % des parties) ; Qd2 (9 % des parties) ; Ne1 (7 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

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Plans. ...Na6 (Développer b8 — 82 % des parties) ; ...c6 (Renforcer le centre — 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	● e6→f5, c7→d6
Passés	—	—
Majorité	—	—

Cases

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

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bg2	● Bg2 Ok (mob. 2)
Ba3	● Ba3 Actif (mob. 5)
Be7		● Be7 Ok (mob. 1)
Bc8		● Bc8 Non développé (mob. 1)
Paire de fous	● Oui	● Oui
Non développées	1 (● 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	● …c7-c5, ● …d6-d5, ● …e6-e5, ● …f5-f4

Partie
1951 World chJ U20 1st – Round 8.2 – Berriman, Grant – 0-1 – Bhend, Edwin – G23 1. Nf3 e6 2. d4 f5 3. g3 Nf6 4. Bg2 d6 5. O-O Be7 6. c4 O-O 7. Nc3 Qe8 8. b3 a5 9. Ba3 c6 10. Re1 Na6
1954 CSR Ch – Round 10 – Sajtar, Jaroslav – 1/2-1/2 – Filip, Miroslav – G81 1. c4 f5 2. Nf3 Nf6 3. g3 e6 4. Bg2 Be7 5. O-O O-O 6. b3 d6 7. d4 a5 8. Nc3 Qe8 9. Ba3 Na6 10. Re1 c6
1955 DDR Ch 06th – Round 3 – Schlieder, Rolf – 0-1 – Kahn, Manfred – G11 1. d4 e6 2. g3 f5 3. Bg2 Nf6 4. Nf3 Be7 5. O-O O-O 6. c4 d6 7. b3 Qe8 8. Ba3 a5 9. Nc3 Na6 10. Re1 Ne4
1956 GDR Ch – Round 9 – Rittner, Horst – 1/2-1/2 – Kahn, Manfred – G12 1. Nf3 e6 2. g3 f5 3. d4 Nf6 4. Bg2 Be7 5. O-O O-O 6. c4 d6 7. b3 Qe8 8. Ba3 a5 9. Nc3 Na6 10. Re1 c6
1956 Harmonie CC Open – Round 7 – Fuster, Geza – 1-0 – Anderson, Frank Ross – G7 1. c4 e6 2. Nf3 f5 3. g3 Nf6 4. Bg2 Be7 5. O-O O-O 6. d4 d6 7. b3 Qe8 8. Nc3 a5 9. Ba3 Na6 10. Ne1 c6
1956 Marianske Lazne/Praha – Round 1 – Flohr, Salo – 1/2-1/2 – Jezek, Jaroslav – G5 1. Nf3 e6 2. c4 f5 3. g3 Nf6 4. Bg2 Be7 5. O-O O-O 6. d4 d6 7. b3 a5 8. Nc3 Qe8 9. Ba3 Na6 10. Ne1 c6
1958 Mar del Plata – Round 5 – Reinhardt, Enrique – 1-0 – Pelikan, Jan – G41 1. Nf3 f5 2. c4 Nf6 3. g3 d6 4. d4 e6 5. Bg2 Be7 6. O-O O-O 7. Nc3 Qe8 8. b3 a5 9. Ba3 e5 10. Nb5 Na6
1964 Hoogovens Beverwijk NED – Round 1 – Donner, H. – 1-0 – Larsen, Benjamin Holsko – G14 1. d4 f5 2. Nf3 Nf6 3. g3 e6 4. Bg2 Be7 5. O-O O-O 6. b3 d6 7. c4 Qe8 8. Nc3 a5 9. Ba3 Na6 10. Re1 Bd7
1965 Buenos Aires – Round 9 – Bolbochan, J. – 1/2-1/2 – Reinhardt, Enrique – G53 1. c4 f5 2. d4 e6 3. Nf3 Nf6 4. g3 Be7 5. Bg2 O-O 6. O-O d6 7. Nc3 Qe8 8. b3 a5 9. Ba3 Na6 10. e3 h6
1967 Harrachov – Round 2.4 – Whiteley, Andrew Jonathan – 1/2-1/2 – Kolbak, Jens – G127 1. d4 f5 2. Nf3 Nf6 3. g3 e6 4. Bg2 Be7 5. O-O O-O 6. c4 d6 7. Nc3 Qe8 8. b3 a5 9. Ba3 Na6 10. Re1 Nb4
1969 Hastings6970 – Round 9 – Portisch, Lajos – 1-0 – Corden, Martyn J – G40 1. c4 f5 2. Nf3 Nf6 3. g3 d6 4. d4 e6 5. Bg2 Be7 6. O-O O-O 7. Nc3 Qe8 8. b3 a5 9. Ba3 Na6 10. Rc1 Bd7

A99h — Ilyin-Zhenevsky (1951)

1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d6 7.Nc3 Qe8 8.b3 a5 9.Ba3

Les coups candidats

9…Na6 — 82.0% (73 parties)

Ambassadeurs : Donner, Jan-Hein (3x), Portisch, Lajos (3x), Corden, Martyn J (3x), Filipowicz, Andrzej (3x), Naumkin, Igor (3x), Kahn, Manfred (2x), Bates, Richard A (2x), Pytel, Krzysztof (2x)

9…c6 — 5.6% (5 parties)

Ambassadeurs : Berriman, Grant (1x), Bhend, Edwin (1x), Gheorghiu, Florin (1x), Weinberger, Tibor (1x), Bletz, Harald (1x), Winge, Stefan (1x), Bodnar, Ovidiu (1x), Rasmussen, Allan Stig (1x)

9…Qh5 — 4.5% (4 parties)

Ambassadeurs : Sosonko, Gennadi (1x), Lemos, Jorge Joao (1x), Paunovic, Srdjan D (1x), Naumkin, Igor (1x), MacElligott, Gerard (1x), Spice, Alan (1x), Ptacnikova, Lenka (1x), Bergsson, Stefan Steingrimur (1x)

9…e5 — 2.2% (2 parties)

Ambassadeurs : Reinhardt, Enrique (1x), Pelikan, Jorge (1x), De Coverly, Roger D (1x), Aarab Kumar Parto (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	9…Na6	9…c6	9…Qh5	9…e5
<1800	1	100%	—	—	—
1800-2200	21	76%	5%	5%	5%
2200-2600	45	87%	7%	4%	—

Évolution par décennie (% des parties)

Décennie	N parties	9…Na6	9…c6	9…Qh5	9…e5
1950s	9	78%	11%	—	11%
1960s	6	100%	—	—	—
1970s	11	73%	9%	9%	—
1980s	8	50%	12%	12%	12%
1990s	33	94%	—	3%	—
2000s	14	79%	7%	—	—
2010s	7	71%	14%	14%	—
2020s	1	100%	—	—	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
9…Na6	71%	100%	▲ +28.6%
9…c6	14%	0%	▼ -14.3%
9…Qh5	14%	0%	▼ -14.3%
9…e5	0%	0%	+0.0%

Parties historiques

9…Na6 — 82.0% (73 parties)

1954 — Sajtar, Jaroslav vs Filip, Miroslav — 1/2-1/2 — Prague CZE
1954 — Donner, Jan-Hein vs Radojcic, Miroslav — 0-1 — Bognor Regis
1955 — Schlieder, Rolf vs Kahn, Manfred — 0-1 — Zwickau
1956 — Fuster, Geza vs Anderson, Frank Ross — 1-0 — Toronto CAN
1956 — Flohr, Salo vs Jezek, Jaroslav — 1/2-1/2 — Marianske Lazne/Praha

9…c6 — 5.6% (5 parties)

1951 — Berriman, Grant vs Bhend, Edwin — 0-1 — Birmingham/Coventry
1975 — Gheorghiu, Florin vs Weinberger, Tibor — 1-0 — Cleveland, OH USA
1982 — Bletz, Harald vs Winge, Stefan — 0-1 — Stockholm SWE
2002 — Bodnar, Ovidiu vs Rasmussen, Allan Stig — 1-0 — Hallsberg SWE
2016 — Egeto, Janos-Lehel vs Pesola, Jyrki — 1/2-1/2 — Budapest HUN

9…Qh5 — 4.5% (4 parties)

1978 — Sosonko, Gennadi vs Lemos, Jorge Joao — 1-0 — Rio de Janeiro Old S
1987 — Paunovic, Srdjan D vs Naumkin, Igor — 0-1 — Namestovo
1993 — MacElligott, Gerard vs Spice, Alan — 0-1 — Dundee ch-BCF
2013 — Ptacnikova, Lenka vs Bergsson, Stefan Steingrimur — 1-0 — Reykjavik ISL

9…e5 — 2.2% (2 parties)

1958 — Reinhardt, Enrique vs Pelikan, Jorge — 1-0 — Mar del Plata ARG
1984 — De Coverly, Roger D vs Aarab Kumar Parto — 1-0 — BE match