E18k — Queen’s Indian: 7.Nc3 d5 8.Ne5 Na6 9.cxd5 exd5

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Nc3 d5 8.Ne5 Na6 9.cxd5 exd5 * ○ Trait aux Blancs

Ouverture — Centre fermé

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

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Avantages : majorité centre (2v1), case forte f4, avant-poste f4(F), Bg2 actif, paire de fous, colonne c.
Faiblesses adverses : arriéré c7, Bb7 enfermé, Be7 mauvais fou.
Problèmes : Bc1 enfermé.
Plans :
● Bg5 — Clouer Nf6
● Rc — Tour sur colonne c

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

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Avantages : majorité aile_dame (3v2), case forte b4, case forte d5, Be7 actif, paire de fous, colonne e.
Faiblesses adverses : Bc1 enfermé.
Problèmes : Bb7 enfermé, arriéré c7.
Plans :
● ...Re — Tour sur colonne e

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

E18k —

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Nc3 d5 8.Ne5 Na6 9.cxd5 exd5

Eval: [+0.28]

Les coups candidats

10.Bf4 — 33.0% (135 parties)

Ambassadeurs : Nun, Jiri (4x), Yudasin, Leonid (4x), Bistric, Faruk (3x), Kirov, Nino (3x), Neckar, Lubomir (3x), Ortega, Lexy (2x), Smejkal, Jan (2x), Gutman, Lev (2x)

10.Qa4 — 22.2% (91 parties)

Ambassadeurs : Neckar, Lubomir (3x), Sunye Neto, Jaime (2x), Abramovic, Bosko (2x), Hirzel, Rene (1x), Farago, Sandor (1x), Kojder, Konrad (1x), Andersson, Ulf (1x), Balashov, Yuri (1x)

10.Bg5 — 17.1% (70 parties)

Ambassadeurs : Alatortsev, Vladimir N. (2x), Kestler, Hans-Guenther (2x), Grivas, Efstratios (2x), Neckar, Lubomir (2x), Dizdarevic, Emir (2x), Bohatirchuk, Fedor (1x), Bohatyrchuk, Fedir Parfenovych (1x), Edelsvard, Olle (1x)

10.Nd3 — 12.5% (51 parties)

Ambassadeurs : Rogers, Ian (3x), Langeweg, Kick (2x), Vogler, Tillmann (2x), Markmann, Ulrich (2x), Trepp, Markus (2x), Yudasin, Leonid (2x), Kaspersen, Morten (1x), Blees, Albert (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	10.Bf4	10.Qa4	10.Bg5	10.Nd3
<1800	1	—	—	—	—
1800-2200	71	35%	32%	14%	4%
2200-2600	289	34%	21%	17%	14%
2600+	10	40%	20%	30%	10%

Évolution par décennie (% des parties)

Décennie	N parties	10.Bf4	10.Qa4	10.Bg5	10.Nd3
1930s	2	—	—	100%	—
1940s	1	100%	—	—	—
1960s	1	—	—	100%	—
1970s	22	9%	23%	27%	18%
1980s	80	32%	12%	20%	28%
1990s	103	25%	26%	13%	18%
2000s	66	38%	29%	11%	3%
2010s	111	38%	23%	20%	2%
2020s	23	57%	17%	13%	9%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
10.Bf4	38%	57%	▲ +18.7%
10.Qa4	23%	17%	▼ -6.0%
10.Bg5	20%	13%	▼ -6.8%
10.Nd3	2%	9%	▲ +6.9%

Parties historiques

10.Bf4 — 33.0% (135 parties)

1949 — Lisitsin, Georgy vs Randviir, Juri — 1/2-1/2 — Leningrad RUS
1976 — Huebner, Robert vs Byrne, Ray — 1/2-1/2 — Las Palmas ESP
1978 — Harding, Tim D vs Berry, Stephen H — 1/2-1/2 — London, Cumberland Hotel
1980 — Pytel, Krzysztof vs Farago, Ivan — 1/2-1/2 — Zemun
1981 — Kuligowski, Adam vs Britton, Richard L — 1/2-1/2 — Ramsgate

10.Qa4 — 22.2% (91 parties)

1976 — Agzamov, Georgy vs Pinchuk, Sergey T — 1-0 — Tashkent UZB
1977 — Andersson, Ulf vs Balashov, Yuri — 1/2-1/2 — Tilburg NED
1977 — Randy Asige vs McCambridge, Vincent — 1-0 — Columbus, OH USA
1978 — Kertesz, Alfred vs Mititelu, Gheorghe — 1/2-1/2 — Arad
1979 — Szyszko, Ignacy vs Grabowski, Adam — 1-0 — Poland

10.Bg5 — 17.1% (70 parties)

1935 — Alatortsev, Vladimir N. vs Bohatirchuk, Fedor — 1/2-1/2 — ?
1935 — Alatortsev, Vladimir N. vs Bohatyrchuk, Fedir Parfenovych — 1/2-1/2 — Moscow RUS
1967 — Edelsvard, Olle vs Johansson, Martin 1979 — 1/2-1/2 — corr SWE/K
1972 — Lein, Anatoly vs Lutikov, Anatoly S — 1/2-1/2 — Chelyabinsk RUS
1976 — Smejkal, Jakub vs Byrne, Ray — 1/2-1/2 — Biel SUI

10.Nd3 — 12.5% (51 parties)

1977 — Bukic, Enver vs Lengyel, Laszlo — 1-0 — Stip
1978 — Panno, Oscar vs Garcia Palermo, Carlos Horacio — 1-0 — Lone Pine, CA USA
1978 — Kelecevic, Nedeljko vs Taylor, Timothy — 1-0 — Eerbeek
1979 — Kavalek, Lubomir vs Ljubojevic, Ljubomir — 1-0 — Montreal CAN
1980 — Osnos, Viatcheslav vs Yudasin, Leonid — 1/2-1/2 — Leningrad RUS

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	● c7
Chaînes	● f2→g3, h2→g3	● a7→b6, c7→b6
Passés	—	—
Majorité	● centre 2v1	● aile_dame 3v2

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● f4 (2v0)	● b4 (2v0), ● d5 (3v2)
Cases faibles	● e4	● d5
Centre	● d4 (1v0), ● e5 (1v0)	● d5 (3v2)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● c	● e

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bg2	● Bg2 Actif (mob. 5)
Bb7		● Bb7 Enfermé (mob. 2)
Be7		● Be7 Actif (mob. 4)
Paire de fous	● Oui	● Oui
Non développées	2 (c1, a1)	1 (a8)

Sécurité du roi

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

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	fermé

Partie
1935 Moscow – Round 16 – Alatortsev, Vladimir N. – 1/2-1/2 – Bohatyrchuk, Fedir Parfenovych – G76 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. g3 Be7 5. Bg2 O-O 6. O-O b6 7. cxd5 exd5 8. Nc3 Bb7 9. Ne5 Na6 10. Bg5 h6
1949 Leningrad – Round 8 – Lisitsin, Georgy – 1/2-1/2 – Randviir, Juri – G65 1. Nf3 d5 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. cxd5 exd5 6. d4 Nf6 7. Nc3 Be7 8. Ne5 O-O 9. O-O Na6 10. Bf4 c5
1967 Corr SWE/K – Round 1 – Edelsvard, Olle – 1/2-1/2 – Johansson, Martin 1979 – G4 1. c4 Nf6 2. d4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 d5 8. Ne5 Na6 9. cxd5 exd5 10. Bg5 Ne4
42. Olympiad 2016 – Round 8.13 – Yilmaz, Mustafa – 1/2-1/2 – Marin, Mihail – G548 1. Nf3 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. d4 O-O 6. Nc3 b6 7. O-O Bb7 8. Ne5 Na6 9. cxd5 exd5 10. Bf4 c5
Biel Interzonal 1976 – Round 1 – Smejkal, Jan – 1/2-1/2 – Byrne, Ray – G2 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O b6 7. Nc3 Bb7 8. Ne5 Na6 9. cxd5 exd5 10. Bg5 c5
World Blitz 2019 – Round 1.39 – Sargissian, Gabriel – 1-0 – Moiseenko, Vadim – G32 1. d4 Nf6 2. Nf3 b6 3. c4 Bb7 4. g3 e6 5. Bg2 d5 6. cxd5 exd5 7. O-O Be7 8. Nc3 O-O 9. Ne5 Na6 10. Bg5 h6
World Blitz 2019 – Round 19.66 – Rakhmanov, Aleksandr – 1-0 – Suleymanli, Aydin – G1310 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. g3 O-O 6. Bg2 b6 7. O-O Bb7 8. cxd5 exd5 9. Ne5 Na6 10. Bg5 c5

1935 Moscow – Round 16 – Alatortsev, Vladimir N. – 1/2-1/2 – Bohatyrchuk, Fedir Parfenovych – G76

1949 Leningrad – Round 8 – Lisitsin, Georgy – 1/2-1/2 – Randviir, Juri – G65

1967 Corr SWE/K – Round 1 – Edelsvard, Olle – 1/2-1/2 – Johansson, Martin 1979 – G4

42. Olympiad 2016 – Round 8.13 – Yilmaz, Mustafa – 1/2-1/2 – Marin, Mihail – G548

Biel Interzonal 1976 – Round 1 – Smejkal, Jan – 1/2-1/2 – Byrne, Ray – G2

World Blitz 2019 – Round 1.39 – Sargissian, Gabriel – 1-0 – Moiseenko, Vadim – G32

World Blitz 2019 – Round 19.66 – Rakhmanov, Aleksandr – 1-0 – Suleymanli, Aydin – G1310