D47i — Semi-Slav: Meran, Lundin, 9.Na4

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 b4 9.Na4 * ● Trait aux Noirs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

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Plans. O-O (Mettre le roi en sécurité, connecter les tours — 33 % des parties) ; e4 (Occuper le centre — 29 % des parties) ; Nxc5 (Cavalier actif en c5 — 9 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

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Plans. ...c5 (Frapper le centre adverse — 61 % des parties) ; ...Bb7 (Développer c8 — 21 % des parties) ; ...Be7 (Développer f8 — 8 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	● c6
Chaînes	● f2→e3, e3→d4	● f7→e6
Passés	—	—
Majorité	—	● aile dame 3v2

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● e5 (2v1)	● d5 (3v0)
Cases faibles	—	● c5
Centre	● d4 (2v0), ● e5 (2v1)	● d5 (3v0)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● c	● d

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 1)
Bd3	● Bd3 Actif (mob. 11)
Bc8		● Bc8 Non développé (mob. 2)
Bf8		● Bf8 Non développé (mob. 3)
Paire de fous	● Oui	● Oui
Non développées	3 (● c1, ● a1, ● h1)	4 (● c8, ● 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	● d4-d5	● …c6-c5, ● …e6-e5

Partie
1934 Ujpest – Round 1 – Stahlberg, Gideon – 1-0 – Thomas, George Alan – G49 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 b4 9. Na4 Qa5 10. b3 Ba6
1936 Hastings3637 – Round 7 – Tylor, Theodore Henry – 0-1 – Alekhine, Alexander – G31 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 b4 9. Na4 c5 10. dxc5 Nxc5
1936 Nottingham – Round 1 – Vidmar, Milan Sr – 1/2-1/2 – Thomas, George Alan – G15 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 b4 9. Na4 Bb7 10. O-O Be7
1936 Podebrady – Round ? – Thomas, George Alan – 1/2-1/2 – Ståhlberg, Gideon – G58 1. c4 e6 2. Nc3 d5 3. d4 c6 4. e3 Nf6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 b4 9. Na4 Bb7 10. b3 c5
1939 Buenos Aires ol f-A – Round 6 – Flores Alvarez, Rodrigo – 0-1 – Lundin, Erik – G104 1. d4 d5 2. c4 c6 3. Nf3 e6 4. e3 Nd7 5. Nc3 Ngf6 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 b4 9. Na4 c5 10. O-O Qa5
1945 URS-sf – Round 5 – Zagoriansky, Evgeny – 1-0 – Chistiakov, Alexander – G18 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. e3 Nbd7 5. Nf3 c6 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 b4 9. Na4 c5 10. O-O cxd4
1947 Leningrad – Round 1 – Shianovsky, Vladislav I – 0-1 – Korchnoi, Viktor – G2 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e3 Nf6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 b4 9. Na4 c5 10. O-O cxd4
1948 Bad Gastein – Round 16 – Gereben, Erno – 1/2-1/2 – Lundin, Erik – G116 1. d4 d5 2. Nf3 e6 3. c4 c6 4. e3 Nf6 5. Nc3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 b4 9. Na4 c5 10. O-O Qa5
1948 Mar del Plata – Round 16 – Castillo Larenas, Mariano – 1/2-1/2 – O'Kelly, Albéric de Galway – G129 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 b4 9. Na4 c5 10. O-O Bb7
1954 Prague zt Prague CZE – Round 16 – Uhlmann, Wolfgang – 1/2-1/2 – Lundin, Erik – G51 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 Nf6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 b4 9. Na4 c5 10. dxc5 Bxc5
1968 Athens – Round 1 – Hort, Vlastimil – 1/2-1/2 – Ciric, Dragoljub M – G2 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e3 Nf6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 b4 9. Na4 c5 10. O-O cxd4
1968 Lugano olm - Round 1 - Gligorić, Svetozar - 1/2-1/2 - Kostro, Jerzy - G49 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 b4 9. Na4 c5 10. e4 cxd4
1968 POL Ch 25th – Round 10 – Schmidt, Wlodzimierz – 1/2-1/2 – Bernard, Ryszard – G57 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 b4 9. Na4 c5 10. Nxc5 Nxc5
1968 Yugoslavia – Round 1 – Gligorić, Svetozar – 1/2-1/2 – Beni, Alfred – G1 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 b4 9. Na4 c5 10. e4 cxd4
1972 Skopje ol (Men) fin-A – Round 14 – Bilek, Istvan – 0-1 – Ree, Hans – G106 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 b4 9. Na4 c5 10. e4 cxd4
Biel Interzonal 1993 – Round 6 – Granda Zuniga, Julio E – 1-0 – Sveshnikov, Evgeny – G133 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e3 Nd7 5. Nf3 Ngf6 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 b4 9. Na4 c5 10. dxc5 Nxc5

D47i — Meran, Lundin (1934)

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 b4 9.Na4

Les coups candidats

9…c5 — 60.6% (137 parties)

Ambassadeurs : Sveshnikov, Evgeny (7x), Vaganian, Rafael A (3x), Kakageldyev, Amanmurad (2x), Gligoric, Sofija (2x), Vaganian, Irina (2x), Kostro, Jerzy (2x), Ruderfer, Mark B (2x), Filip, Miroslav (2x)

9…Bb7 — 21.2% (48 parties)

Ambassadeurs : Kindl, Peter (1x), Hoffmann, Achim Gunter (1x), Wisskirchen, Willi (1x), Haverkamp, Wilfried (1x), Radev, Nikolai (1x), Szabo, Janos (1x), Sahovic, Dragutin (1x), Klovans, Janis (1x)

9…Be7 — 8.0% (18 parties)

Ambassadeurs : Baradze, Dzhemal (1x), Privorotsky, Oleg (1x), Zubieta Villegas, Magin (1x), Aggos, Alexandros (1x), Benedde, Guenter (1x), Daub, Christina (1x), Kovacs, Janos (1x), Majdanics, Antal (1x)

9…Bd6 — 4.9% (11 parties)

Ambassadeurs : Fuest, Martin (1x), Donner, Bernd (1x), Aben, Paul (1x), Gamble, Raymond J (1x), Lojewski, Ralf (1x), Humburg, Juergen (1x), Wagner, Bernd (1x), Grummich, Horst (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	9…c5	9…Bb7	9…Be7	9…Bd6
<1800	4	75%	—	—	—
1800-2200	81	53%	19%	10%	11%
2200-2600	115	64%	23%	6%	2%
2600+	1	100%	—	—	—

Évolution par décennie (% des parties)

Décennie	N parties	9…c5	9…Bb7	9…Be7	9…Bd6
1950s	2	100%	—	—	—
1960s	9	78%	—	22%	—
1970s	25	80%	20%	—	—
1980s	7	43%	43%	14%	—
1990s	50	58%	26%	4%	4%
2000s	62	56%	26%	10%	5%
2010s	49	55%	16%	10%	8%
2020s	22	64%	14%	9%	9%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
9…c5	55%	64%	▲ +8.5%
9…Bb7	16%	14%	▼ -2.7%
9…Be7	10%	9%	▼ -1.1%
9…Bd6	8%	9%	▲ +0.9%

Parties historiques

9…c5 — 60.6% (137 parties)

1953 — Rabindra Ch. Dey vs Grivainis, Konstantin — 1/2-1/2 — Charnwood, Cape Town
1954 — Uhlmann, Wolfgang vs Lundin, Erik — 1/2-1/2 — Prague zt Prague CZE
1968 — Gligoric, Sofija vs Beni, Alfred — 1/2-1/2 — Yugoslavia
1968 — Schmidt, Wlodzimierz vs Bernard, Ryszard — 1/2-1/2 — Lodz POL
1968 — Gligoric, Sofija vs Kostro, Jerzy — 1/2-1/2 — Lugano olm

9…Bb7 — 21.2% (48 parties)

1970 — Radev, Nikolai vs Szabo, Janos — 1/2-1/2 — Albena
1971 — Tukmakov, Vladimir B vs Vasiukov, Evgeni — 1-0 — Leningrad RUS
1974 — Garcia Gonzales, Guillermo vs Neckar, Lubomir — 1-0 — Teesside ENG
1974 — Weber, Adrian vs Heinicke, Gisbert — 1-0 — Hamburg GER
1978 — Sahovic, Dragutin vs Klovans, Janis — 0-1 — Yurmala

9…Be7 — 8.0% (18 parties)

1960 — Zubieta Villegas, Magin vs Aggos, Alexandros — 0-1 — Leipzig GER
1967 — Baradze, Dzhemal vs Privorotsky, Oleg — 1/2-1/2 — Soviet Union
1980 — Benedde, Guenter vs Daub, Christina — 1-0 — Wuerttemberg
1994 — Kovacs, Janos vs Majdanics, Antal — 1-0 — Hungary 2 tt
1996 — Nedobora, Mikhail vs Alonso Martinez, Tomas — 1-0 — Nigran

9…Bd6 — 4.9% (11 parties)

1995 — Fuest, Martin vs Donner, Bernd — 1-0 — NRW ch Muenster, NRW
1998 — Aben, Paul vs Gamble, Raymond J — 1/2-1/2 — London ENG
2003 — Wagner, Bernd vs Grummich, Horst — 0-1 — Friedrichroda
2004 — Lojewski, Ralf vs Humburg, Juergen — 1/2-1/2 — Ruhrgebiet
2007 — Stefansson, Hannes vs Thorfinnsson, Bragi — 1-0 — Reykjavik ISL