Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→e3, e3→d4	● d7→e6, f7→e6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● e5 (3v0), ● g5 (2v0)	● b4 (2v0), ● d5 (2v0)
Cases faibles	—	—
Centre	● d4 (3v1), ● e5 (3v0)	● d5 (2v0), ● e4 (1v0)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bf1	● Bf1 Non développé (mob. 5)
Bf4	● Bf4 Actif (mob. 7)
Bc8		● Bc8 Non développé (mob. 0)
Bf8		● Bf8 Non développé (mob. 2)
Paire de fous	● Oui	● Oui
Non développées	4 (● b1, ● f1, ● a1, ● h1)	5 (● b8, ● 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	● …e6-e5

A46p — Indian: London, 3…c5 4.e3 Qb6

1.d4 Nf6 2.Nf3 e6 3.Bf4 c5 4.e3 Qb6 * ○ Trait aux Blancs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plans. Qc1 (Prépare O-O-O — 60 % des parties) ; Nc3 (Développer b1 — 29 % des parties) ; b3 (6 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

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Plans. ...Nc6 (Développer b8 — 52 % des parties) ; ...cxd4 (Capture en d4, Occuper le centre — 16 % des parties) ; ...a6 (Préparer expansion aile dame — 11 % des parties) ; ...Nh5 (7 % des parties) ; ...d5 (Occuper le centre — 6 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Partie
1919 Stockholm – Round 2 – Rubinstein, Akiba – 0-1 – Bogoljubow, Efim – G12 1. d4 Nf6 2. Nf3 e6 3. Bf4 c5 4. e3 Qb6 5. Qc1 Nc6 6. c3 d5 7. h3 Bd7 8. Nbd2 Rc8 9. Be2 Be7 10. O-O O-O
1920 Stockholm/Gothenburg m – Round 2 – Rubinstein, Akiba – 1-0 – Bogoljubow, Efim – G3 1. d4 Nf6 2. Nf3 e6 3. Bf4 c5 4. e3 Qb6 5. Qc1 Nc6 6. c3 d5 7. Nbd2 Bd7 8. h3 Rc8 9. Be2 Be7 10. O-O O-O
1922 Bad Pistyan Breyer Memorial-B – Round ? – Burian, Ludvik – 1-0 – Balogh, Janos – G4 1. d4 Nf6 2. Nf3 e6 3. Bf4 c5 4. e3 Qb6 5. Qc1 Nc6 6. c3 d5 7. Nbd2 Bd7 8. Qc2 Rc8 9. Qb3 Be7 10. Qxb6 axb6
1926 Berlin – Round 1 – Saemisch, Friedrich – 0-1 – Bogoljubow, Efim – G25 1. d4 Nf6 2. Nf3 e6 3. Bf4 c5 4. e3 Qb6 5. Qc1 Nc6 6. c3 Nh5 7. Bg3 d5 8. Nbd2 cxd4 9. Nxd4 e5 10. N4f3 e4
1927 London olm – Round 15 – Andersen, Erik – 1-0 – Censer, M. – G39 1. d4 Nf6 2. Nf3 e6 3. Bf4 c5 4. e3 Qb6 5. Qc1 Nc6 6. c3 Be7 7. Nbd2 d5 8. Bd3 O-O 9. h3 Bd7 10. O-O Rac8
1934 Mar del Plata – Round 2 – Guimard, Carlos E – 1/2-1/2 – Hounie Fleurquin, Carlos – G16 1. d4 Nf6 2. Nf3 e6 3. Bf4 c5 4. e3 Qb6 5. Qc1 Nc6 6. c3 d5 7. Nbd2 Bd7 8. Bd3 Rc8 9. Rb1 cxd4 10. exd4 Nb4
1936 Muenchen ol – Round 7 – Romih, Max – 1-0 – Alexandrescu, Gheorghe – G18 1. d4 Nf6 2. Nf3 e6 3. Bf4 c5 4. e3 Qb6 5. Nc3 cxd4 6. exd4 d5 7. Nb5 Na6 8. a4 Be7 9. Bd3 O-O 10. c3 Bd7
1954 Bucharest – Round 3 – Sliwa, Bogdan – 0-1 – Kholmov, Nikita Vit – G36 1. d4 Nf6 2. Nf3 e6 3. Bf4 c5 4. e3 Qb6 5. Qc1 Nc6 6. c3 d5 7. h3 Qd8 8. Nbd2 Bd6 9. dxc5 Bxc5 10. Bd3 Bd6
1957 Leningrad Ch – Round 1 – Md Rubel – 0-1 – Cherepkov, Alexander V – G6 1. d4 Nf6 2. Nf3 e6 3. Bf4 c5 4. e3 Qb6 5. dxc5 Qxb2 6. Nbd2 Nc6 7. Rb1 Qc3 8. Bc4 Ne4 9. O-O Nxc5 10. e4 b6
1969 JUG-24ch Novi Travnik – Round 17 – Rakic, Tomislav – 1/2-1/2 – Parma, Bruno – G9 1. d4 Nf6 2. Nf3 e6 3. Bf4 c5 4. e3 Qb6 5. Nc3 d5 6. Nb5 Na6 7. Ne5 Be7 8. a4 O-O 9. c3 c4 10. b3 cxb3
1969 Zagreb – Round 3 – Grdinic, Zvonimir – 1/2-1/2 – Damjanovic, Marko – G32 1. d4 Nf6 2. Nf3 e6 3. Bf4 c5 4. e3 Qb6 5. Qc1 cxd4 6. exd4 Nc6 7. c3 d5 8. Nbd2 Bd7 9. Bd3 Rc8 10. Qb1 Ne7
SportAccord Blitz Men 2013 – Round 17.6 – Kamsky, Gata – 1/2-1/2 – Giri, Anish – G131 1. d4 Nf6 2. Nf3 e6 3. Bf4 c5 4. e3 Qb6 5. Qc1 Nc6 6. c3 Nh5 7. Bg3 h6 8. Nbd2 d5 9. Bd3 Be7 10. O-O Nxg3
World Blitz 2015 – Round 15.55 – Bauer, Christian – 1-0 – Riff, Jean-Noel – G957 1. d4 Nf6 2. Nf3 e6 3. Bf4 c5 4. e3 Qb6 5. Nc3 a6 6. Na4 Qa5+ 7. c3 cxd4 8. exd4 d6 9. b4 Qd8 10. c4 Be7

A46p — London (1919)

1.d4 Nf6 2.Nf3 e6 3.Bf4 c5 4.e3 Qb6

Les coups candidats

5.Qc1 — 44.5% (574 parties)

Ambassadeurs : Kovacevic, Slobodan (13x), Kovacevic, Sl (11x), Bistric, Faruk (4x), Stawiarski, Edmond (4x), Kovacevic, Vlatko (3x), Pereyra, Darío (3x), Adorjan, Andras (2x), Volman, Yvo (2x)

5.Nc3 — 31.0% (399 parties)

Ambassadeurs : Kovacevic, Slobodan (13x), Lenz, Juergen (7x), Rakic, Tomislav (4x), Polgar, Susan (3x), Firnhaber, Ingo (3x), Chandler, Murray G (2x), Bonnez, Finn (2x), Salmon, Neil V. (2x)

5.Na3 — 11.8% (152 parties)

Ambassadeurs : Podlesnik, Bogdan (5x), Rost, Detlef (2x), Tiviakov, Sergei (2x), Budisavljevic, Luka (2x), Iotov, Valentin (2x), Tsogzolmaa, Nanjid (2x), Strutinskaia, Galina (2x), Janaszak, Dawid (2x)

5.b3 — 8.7% (112 parties)

Ambassadeurs : Pereyra, Darío (4x), Lueders, Gerhard (2x), Cornell, David (2x), Buckels, Valentin (2x), Pritchett, Craig W (1x), Szurovszky, Elek (1x), Kral, Peter (1x), Manfeldt, Alfred (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	5.Qc1	5.Nc3	5.Na3	5.b3
<1800	111	34%	24%	13%	21%
1800-2200	587	44%	32%	10%	10%
2200-2600	482	49%	32%	14%	3%
2600+	9	33%	11%	56%	—

Évolution par décennie (% des parties)

Décennie	N parties	5.Qc1	5.Nc3	5.Na3	5.b3
1950s	4	75%	—	—	—
1960s	3	67%	33%	—	—
1970s	8	62%	12%	—	12%
1980s	54	70%	24%	4%	2%
1990s	150	56%	33%	1%	8%
2000s	291	52%	31%	1%	12%
2010s	609	41%	31%	15%	8%
2020s	170	24%	32%	30%	6%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
5.Qc1	41%	24%	▼ -16.9%
5.Nc3	31%	32%	▲ +1.3%
5.Na3	15%	30%	▲ +14.7%
5.b3	8%	6%	▼ -1.9%

Parties historiques

5.Qc1 — 44.5% (574 parties)

1954 — Sliwa, Bogdan vs Kholmov, Ratmir D — 0-1 — Bucharest ROU
1955 — Netz, Siegfried vs Dorawa, Bernhard — 0-1 — Zittau
1956 — Romih, Max vs Romani, Elio — 1-0 — Rovigo
1969 — Grdinic, Zvonimir vs Damjanovic, Marko — 1/2-1/2 — Zagreb CRO
1969 — Mihaljcisin, Mihajlo vs Kluger, Gyula — 1/2-1/2 — Debrecen HUN

5.Nc3 — 31.0% (399 parties)

1969 — Rakic, Tomislav vs Parma, Bruno — 1/2-1/2 — JUG-24ch Novi Travnik
1974 — Richtarsky, Lothar vs Waagener, Ulrich — 0-1 — Ibbenbueren
1981 — Rakic, Tomislav vs Sunye Neto, Jaime — 0-1 — Luanda
1983 — Supancic, Darko vs Sibarevic, Milenko — 1-0 — Pula CRO
1985 — Berg, Michael vs Bator, Robert — 0-1 — Stockholm SWE

5.Na3 — 11.8% (152 parties)

1985 — Callaway, Joseph E vs Alburt, Lev — 0-1 — Hollywood US Open
1989 — Bistric, Faruk vs Podlesnik, Bogdan — 1-0 — Bled SLO
1990 — Dehen, Lothar vs Jaeger, Manfred — 1-0 — GER
1999 — Nguyen, Thanh Binh vs Nguyen, Tran Quang Minh — 1-0 — Dong Thap
2002 — Mary, Patrick vs Yepez Gutierrez, Julian — 1-0 — ICCF Email

5.b3 — 8.7% (112 parties)

1978 — Szurovszky, Elek vs Kral, Peter — 1-0 — Salgotarjan
1988 — Lueders, Gerhard vs Pritchett, Craig W — 1/2-1/2 — GER
1990 — Schonfeld, Ivan vs Willemsen, Daan — 1/2-1/2 — Staufer Open
1992 — Horvath, Jozsef M vs Somlo, Bela — 1/2-1/2 — ?
1992 — Horvath, Jozsef vs Timar, Zsolt — 1/2-1/2 — Hungary ch-33 9294

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