E20v — Nimzo-Indian: Romanishin, 6.Nxd4 O-O 7.Bg2 d5

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.g3 c5 5.Nf3 cxd4 6.Nxd4 O-O 7.Bg2 d5 * ○ Trait aux Blancs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Avantages : majorité aile_dame (3v2), case forte f4, case forte b5, Bg2 actif, paire de fous, colonne d.
Faiblesses adverses : Bc8 enfermé.
Problèmes : roi au centre, Bc1 enfermé, 3 pièces non développées (C1, A1, H1).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● Bg5 — Clouer Nf6
● Rd — Tour sur colonne d

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Avantages : majorité centre (2v1), Bb4 actif, paire de fous, colonne c.
Faiblesses adverses : Bc1 enfermé, roi blanc au centre, pawn c4 en prise.
Problèmes : Bc8 enfermé, 3 pièces non développées (B8, C8, A8).
Plans :
● ...Bd7 — PRIORITÉ: libérer le Bc8 (...Bd7, b6+Bb7, ...Bf5)
● ...Nbd7 — Développer Nb8
● ...e5 — Rupture
● ...Rc — Tour sur colonne c

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

E20v — Romanishin

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.g3 c5 5.Nf3 cxd4 6.Nxd4 O-O 7.Bg2 d5

Eval: [+0.12]

Les coups candidats

8.cxd5 — 61.6% (1129 parties) →

Ambassadeurs : Nielsen, Peter Heine (16x), Miladinovic, Igor (15x), Bacrot, Etienne (11x), Campos Moreno, Javier B. (10x), Zvjaginsev, Vadim (9x), Jakovenko, Dmitry (9x), Kasparov, Garry (8x), Carlsen, Magnus (8x)

8.Qb3 — 20.3% (373 parties)

Ambassadeurs : Ubilava, Elizbar (8x), Gaprindashvili, Nona (8x), Suba, Mihai (7x), Portisch, Lajos (6x), Kholmov, Ratmir D (5x), Ward, Chris G (5x), Ronczkowski, Manfred (5x), Moiseenko, Alexander (5x)

8.O-O — 15.0% (276 parties)

Ambassadeurs : Stocek, Jiri (8x), Moiseenko, Alexander (4x), Schandorff, Lars (3x), Sokolov, Ivan (3x), von Gleich, Alexander (3x), Syre, Christian (3x), Rodriguez Cespedes, Amador (3x), Gurevich, Mikhail (3x)

8.Nc2 — 2.3% (42 parties)

Ambassadeurs : Hergott, Deen (3x), Cebalo, Miso (3x), Adrian, Claude (3x), Lepelletier, Benoit (2x), Piecusch, R. (1x), Schlotthauber, Werner (1x), Fuster, Geza (1x), Piasetski, Leon (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	8.cxd5	8.Qb3	8.O-O	8.Nc2
<1800	18	78%	6%	11%	6%
1800-2200	227	63%	19%	14%	3%
2200-2600	1221	61%	21%	15%	2%
2600+	166	75%	12%	10%	2%

Évolution par décennie (% des parties)

Décennie	N parties	8.cxd5	8.Qb3	8.O-O	8.Nc2
1950s	1	—	—	100%	—
1960s	4	75%	25%	—	—
1970s	21	62%	14%	14%	10%
1980s	301	36%	37%	25%	1%
1990s	437	50%	27%	18%	2%
2000s	571	74%	13%	12%	1%
2010s	437	73%	13%	10%	3%
2020s	62	66%	11%	13%	10%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
8.cxd5	73%	66%	▼ -7.3%
8.Qb3	13%	11%	▼ -1.5%
8.O-O	10%	13%	▲ +3.3%
8.Nc2	3%	10%	▲ +6.5%

Joueurs célèbres

Champions du monde dans cette position

Kasparov, Garry — 10 parties
Carlsen, Magnus — 9 parties
Karpov, Anatoly — 6 parties
Kramnik, Vladimir — 6 parties
Anand, Viswanathan — 5 parties
Karpov, Aleksandr — 3 parties
Tal, Mikhail — 2 parties
Ju, Wenjun — 2 parties

Parties historiques

8.cxd5 — 61.6% (1129 parties)

1961 — Schmid, Lothar vs Clarke, Peter H — 1/2-1/2 — Neuhausen
1962 — Gheorghiu, Florin vs Evans, Larry Melvyn — 1/2-1/2 — Varna BUL
1967 — Sokolov, Vladimir vs Forintos, Gyozo V — 1/2-1/2 — Liberation Belgrade YUG
1971 — Keene, Raymond D vs Botterill, George S. — 1/2-1/2 — Oxford, Christ Church
1972 — Gedevanishvili, Dmitry vs Romanishin, Oleg M — 0-1 — Moscow RUS

8.Qb3 — 20.3% (373 parties)

1965 — Liebisch, Dieter vs Bruentrup, Dieter — 0-1 — Bourgas BUL
1972 — Hill Alan vs Berry, Jonathan — 0-1 — Vancouver BC CAN
1975 — Webb, Simon vs Jones, Iolo C — 1-0 — Glasgow SCO
1979 — Czikuhs vs Schwarz, Eckhard — 0-1 — corr DDR-cup5
1980 — Ubilava, Elizbar vs Schussler, Harry — 1-0 — Tbilisi Tbilisi GEO

8.O-O — 15.0% (276 parties)

1958 — Pomar Salamanca, Arturo vs Paoli, Enrico — 1-0 — Santander ESP
1976 — Pafnutieff, Vladimir vs Fasano Ray — 0-1 — Seattle, WA USA
1977 — Pope, Jacob vs Mcconnell, Sullivan — 1/2-1/2 — Berkeley
1979 — Lund, Jens Christian vs Hyldkrog, Lars — 1-0 — Denmark ch corr
1985 — Romanishin, Oleg M vs Ribli, Zoltan — 1-0 — Reggio Emilia ITA

8.Nc2 — 2.3% (42 parties)

1972 — Fuster, Geza vs Piasetski, Leon — 0-1 — Toronto CAN
1979 — Karasev, Vladimir I vs Gavrikov, Viktor — 1-0 — Beltsy
1980 — Olafsson, Helgi vs Helmers, Knut Joran — 1/2-1/2 — Reykjavik ISL
1983 — Schuh, Hubert vs Chandler, Murray G — 0-1 — Duitsland tt
1987 — Ditzler, Juerg vs Cebalo, Miso — 0-1 — Geneva SUI

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→g3, h2→g3	● e6→d5, f7→e6
Passés	—	—
Majorité	● aile_dame 3v2	● centre 2v1

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● f4 (2v0), ● b5 (3v0)	—
Cases faibles	● e4	—
Centre	● d4 (1v0)	—

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● d	● c

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bg2	● Bg2 Actif (mob. 5)
Bb4		● Bb4 Actif (mob. 6)
Bc8		● Bc8 Non développé (mob. 1)
Paire de fous	● Oui	● Oui
Clouages	● knight c3	—
Non développées	3 (c1, a1, h1)	3 (b8, c8, a8)

Sécurité du roi

	♔ Blancs	♚ Noirs
Statut	● Au centre !	● Roqué
Droits de roque	O-O / O-O-O	—

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	semi-ouvert
Ruptures	● c4-c5, ● e2-e3, ● f2-f3	● …e6-e5

Partie
18. Amber Blindfold 2009 – Round 5 – Aronian, Levon – 1/2-1/2 – Carlsen, Magnus – G10 1. c4 c5 2. Nf3 Nf6 3. d4 cxd4 4. Nxd4 e6 5. g3 Bb4+ 6. Nc3 O-O 7. Bg2 d5 8. O-O dxc4 9. Nc2 Bxc3 10. bxc3 Qc7
19. European Teams 2013 – Round 2.13 – Ivanisevic, Ivan – 1/2-1/2 – Morrison, Graham – G68 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. g3 cxd4 6. Nxd4 O-O 7. Bg2 d5 8. Qb3 Bxc3+ 9. bxc3 Nc6 10. cxd5 Na5
3. ACP World Rapid Cup 2009 – Round 3.5 – Gelfand, Boris – 1-0 – Jakovenko, Dmitry – G39 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. g3 cxd4 6. Nxd4 O-O 7. Bg2 d5 8. Qb3 Na6 9. cxd5 Nxd5 10. O-O Nxc3
Corus A 2006 – Round 11 – Ivanchuk, Vasyl – 1/2-1/2 – Topalov, Veselin – G66 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. g3 O-O 6. Bg2 cxd4 7. Nxd4 d5 8. Qb3 Bxc3+ 9. Qxc3 e5 10. Nb3 Nc6
Interpolis 1981 – Round 1 – Sosonko, Gennadi – 1-0 – Timman, Jan H – G14 1. d4 Nf6 2. c4 e6 3. g3 c5 4. Nf3 cxd4 5. Nxd4 Bb4+ 6. Nc3 O-O 7. Bg2 d5 8. Qb3 Bxc3+ 9. bxc3 e5 10. Nb5 dxc4
Interpolis 1986 – Round 9 – Karpov, Anatoly – 1/2-1/2 – Portisch, Lajos – G28 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. g3 cxd4 6. Nxd4 O-O 7. Bg2 d5 8. O-O dxc4 9. Qa4 Na6 10. Ndb5 Nd5
Levitov Chess Week Rapid 2023 – Round 2.3 – Mamedyarov, Shakhriyar – 1/2-1/2 – Anand, Viswanathan – G8 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. g3 O-O 6. Bg2 cxd4 7. Nxd4 d5 8. Nc2 Bxc3+ 9. bxc3 dxc4 10. Ba3 Re8
Lucerne 1985 – Round 1 – Karpov, Anatoly – 1/2-1/2 – Portisch, Lajos – G2 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. g3 cxd4 6. Nxd4 O-O 7. Bg2 d5 8. Qb3 Bxc3+ 9. bxc3 dxc4 10. Qa3 Nbd7
Qatar Masters Open 2015 – Round 9.2 – Yu, Yangyi – 1-0 – So, Wesley – G298 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. g3 cxd4 6. Nxd4 O-O 7. Bg2 d5 8. Nc2 Bxc3+ 9. bxc3 Qc7 10. cxd5 Nxd5
Reggio Emilia8586 1985 – Round 10 – Romanishin, Oleg M – 1-0 – Ribli, Zoltan – G16 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. g3 c5 5. Nf3 cxd4 6. Nxd4 O-O 7. Bg2 d5 8. O-O dxc4 9. Qa4 Qa5 10. Qxa5 Bxa5
Saint Louis Blitz 2018 – Round 6.3 – So, Wesley – 1/2-1/2 – Aronian, Levon – G28 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. g3 c5 5. Nf3 cxd4 6. Nxd4 O-O 7. Bg2 d5 8. O-O dxc4 9. Qa4 Na6 10. Rd1 Qe8
Toluca Interzonal 1982 – Round 4 – Kouatly, Bachar – 1/2-1/2 – Portisch, Lajos – G8 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. Nc3 cxd4 5. Nxd4 Bb4 6. g3 O-O 7. Bg2 d5 8. Qb3 Bxc3+ 9. bxc3 e5 10. Nf3 dxc4
World Blitz 2022 – Round 20.66 – Jumabayev, Rinat – 1/2-1/2 – Khusnutdinov, Rustam – G1091 1. d4 e6 2. Nf3 c5 3. c4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4 6. g3 d5 7. Bg2 O-O 8. O-O dxc4 9. Nc2 Be7 10. Qxd8 Rxd8
World Blitz 2023 – Round 13.39 – Predke, Alexandr – 1-0 – Moiseenko, Alexander – G759 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nc3 c5 5. g3 cxd4 6. Nxd4 O-O 7. Bg2 d5 8. O-O dxc4 9. Ndb5 Nc6 10. Bf4 e5
World Cup 1991 – Round 1 – Beliavsky, Alexander G – 1/2-1/2 – Portisch, Lajos – G2 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. g3 cxd4 6. Nxd4 O-O 7. Bg2 d5 8. Qb3 Bxc3+ 9. Qxc3 e5 10. Nb3 Nc6

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