Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● c2→d3, e2→d3, f2→g3, h2→g3	● f7→g6, h7→g6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● f4 (2v0), ● g5 (2v0)	● b4 (2v0), ● d4 (2v1), ● g4 (2v0), ● f5 (2v0)
Cases faibles	—	—
Centre	—	● d4 (2v1), ● d5 (2v0), ● e4 (2v1)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bg2	● Bg2 Ok (mob. 2)
Bc8		● Bc8 Non développé (mob. 5)
Bf8		● Bf8 Non développé (mob. 2)
Paire de fous	● Oui	● Oui
Non développées	3 (● b1, ● c1, ● a1)	4 (● c8, ● f8, ● a8, ● h8)

Sécurité du roi

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

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	mobile
Ruptures	● c2-c4, ● d3-d4, ● e2-e4	● …c5-c4

A08l — Reti: KIA, 2…c5 + 3…g6

1.Nf3 d5 2.g3 c5 3.Bg2 g6 4.O-O Nc6 5.d3 Nf6 * ○ Trait aux Blancs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plans. Nbd2 (Développer b1 — 65 % des parties) ; Nc3 (Développer b1 — 13 % des parties) ; c3 (Renforcer le centre — 7 % des parties) ; c4 (Frapper le centre adverse — 6 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plans. ...Bg7 (Fianchetto, fou sur la grande diagonale — 94 % des parties) ; ...d4 (Occuper le centre — 2 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Partie
1923 Amsterdam – Round 3.1 – Oskam, Arent Jan – 1/2-1/2 – Euwe, Max – G15 1. Nf3 Nf6 2. g3 c5 3. Bg2 Nc6 4. d3 d5 5. O-O g6 6. Nbd2 Bg7 7. e4 O-O 8. Re1 b6 9. exd5 Nxd5 10. Nc4 Bb7
1946 Stockholm SWE – Round ? – Lundin, Erik – 1-0 – Nilsson, Zandor – G20 1. Nf3 Nf6 2. g3 d5 3. Bg2 c5 4. O-O Nc6 5. d3 g6 6. Nbd2 Bg7 7. e4 O-O 8. exd5 Nxd5 9. Nb3 b6 10. Re1 e5
1953 CSR Ch – Round 4.3 – Sajtar, Jaroslav – 1/2-1/2 – Hofmann, Vilem – G2 1. Nf3 Nf6 2. g3 d5 3. Bg2 c5 4. O-O Nc6 5. d3 g6 6. Nbd2 Bg7 7. e4 O-O 8. Re1 e5 9. exd5 Nxd5 10. Nc4 Re8
1955 Argentina – Round 19 – Behrensen, Jorge – 1/2-1/2 – Maderna, Carlos – G139 1. Nf3 Nf6 2. g3 c5 3. Bg2 Nc6 4. O-O d5 5. d3 g6 6. c4 Bg7 7. Nc3 d4 8. Na4 Qd6 9. a3 O-O 10. Rb1 Nd7
1960 Olympiad prel III – Round 8 – Anastassopulos, Anastasios – 0-1 – Clarke, Peter H – G61 1. Nf3 c5 2. g3 Nc6 3. Bg2 Nf6 4. O-O d5 5. d3 g6 6. Nbd2 Bg7 7. e4 O-O 8. Re1 b6 9. h3 e6 10. c3 Ba6
1962 Whitby ch-BCF – Round 10.2 – Franklin Sheunesu Mhembere – 0-1 – Clarke, Paul R H – G107 1. g3 d5 2. Bg2 c5 3. Nf3 Nf6 4. d3 Nc6 5. O-O g6 6. Nbd2 Bg7 7. e4 O-O 8. Re1 b6 9. c3 e6 10. Qa4 Bb7
1962 Whitby ch-BCF – Round 5.4 – Fuller, Roberto Antonio – 0-1 – Clarke, Paul R H – G69 1. Nf3 c5 2. g3 Nf6 3. Bg2 d5 4. d3 Nc6 5. O-O g6 6. Nbd2 Bg7 7. e4 O-O 8. c3 e6 9. Qc2 b6 10. Re1 Ba6
1964 Budapest Ch – Round 1 – Varnusz, Egon – 0-1 – Gasztonyi, Endre – G22 1. Nf3 Nf6 2. g3 d5 3. Bg2 c5 4. O-O Nc6 5. d3 g6 6. Nbd2 Bg7 7. e4 O-O 8. c3 e5 9. exd5 Nxd5 10. Nb3 b6
1966 Aarhus – Round 1 – Jakobsen, Ole – 0-1 – Brinck-Claussen, Bjorn – G20 1. Nf3 Nf6 2. g3 c5 3. Bg2 Nc6 4. O-O g6 5. d3 d5 6. Nc3 Bg7 7. Bg5 h6 8. Bd2 O-O 9. a3 e5 10. Rb1 Qe7
1969 Athene zt – Round 16 – Jansa, Vlastimil – 1-0 – Forintos, Gyozo V – G24 1. Nf3 Nf6 2. g3 c5 3. Bg2 Nc6 4. O-O g6 5. d3 d5 6. Nbd2 Bg7 7. e4 O-O 8. Re1 h6 9. c3 dxe4 10. dxe4 Be6
43. Olympiad 2018 – Round 5.32 – Wynn, Zaw Htun – 0-1 – Iturrizaga Bonelli, Eduardo – G335 1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d3 Nf6 5. O-O g6 6. Nbd2 Bg7 7. e4 O-O 8. c3 Qc7 9. Re1 Rd8 10. Qe2 b6
World Blitz 2017 – Round 2.64 – Alem, Ali Hussain – 0-1 – Sethuraman, S.P. – G117 1. Nf3 d5 2. g3 Nf6 3. Bg2 c5 4. O-O Nc6 5. d3 g6 6. Nbd2 Bg7 7. Rb1 O-O 8. b3 e5 9. e4 Re8 10. Bb2 d4
World Blitz 2018 – Round 12.51 – Amonatov, Farrukh – 0-1 – Fridman, Daniel – G732 1. Nf3 Nf6 2. g3 d5 3. Bg2 c5 4. O-O Nc6 5. d3 g6 6. Nbd2 Bg7 7. e4 O-O 8. c3 b6 9. Re1 e6 10. a3 Ba6
World Blitz 2019 – Round 8.38 – Paravyan, David – 0-1 – Sethuraman, S.P. – G549 1. Nf3 d5 2. g3 Nf6 3. Bg2 c5 4. O-O Nc6 5. d3 g6 6. Nbd2 Bg7 7. e4 O-O 8. Re1 e5 9. exd5 Nxd5 10. Nc4 f6

A08l — KIA (1923)

1.Nf3 d5 2.g3 c5 3.Bg2 g6 4.O-O Nc6 5.d3 Nf6

Les coups candidats

6.Nbd2 — 64.6% (518 parties)

Ambassadeurs : Clarke, Peter (2x), Shirov, Alexei (2x), Skorna, Ullrich (2x), Matthey, Harald (2x), Niebling, Ferdinand (2x), Bulakh, Oleksandra (2x), Oney, Gulumser (2x), Ghasi, Ameet K (2x)

6.Nc3 — 12.8% (103 parties)

Ambassadeurs : Marian, Ralf (2x), Chandler, Murray G (2x), Trubitsyna, Yulia (2x), Golovko, N. (1x), Estrin, Boris (1x), Dozsa, Paul (1x), Szekely, Janos Ferenc (1x), Bukal, Vladimir Jr. (1x)

6.c3 — 7.1% (57 parties)

Ambassadeurs : Borloy, Karoly (1x), Portisch, Lajos (1x), Lebredo Zaragoitia, Gerardo (1x), Damjanovic, Marko (1x), Salonen, Jyrki (1x), Binham, Timothy F. (1x), Crispino Giuseppe (1x), Passerotti, Pierluigi (1x)

6.c4 — 6.1% (49 parties)

Ambassadeurs : Morgan, Anthony (1x), Skorob, E (1x), Behrensen, Jorge (1x), Maderna, Carlos (1x), Hofmann, Michael (1x), Domont, Alexandre (1x), Jensen, Soren Holm (1x), Jelling, Erik (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	6.Nbd2	6.Nc3	6.c3	6.c4
<1800	44	68%	7%	5%	5%
1800-2200	329	68%	14%	5%	4%
2200-2600	298	58%	17%	10%	7%
2600+	7	57%	—	—	29%

Évolution par décennie (% des parties)

Décennie	N parties	6.Nbd2	6.Nc3	6.c3	6.c4
1950s	7	57%	29%	—	14%
1960s	17	71%	12%	6%	6%
1970s	29	66%	14%	14%	3%
1980s	50	64%	22%	4%	4%
1990s	165	68%	7%	8%	6%
2000s	210	67%	13%	7%	5%
2010s	248	62%	13%	8%	8%
2020s	76	57%	18%	4%	7%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
6.Nbd2	62%	57%	▼ -5.9%
6.Nc3	13%	18%	▲ +5.5%
6.c3	8%	4%	▼ -4.1%
6.c4	8%	7%	▼ -1.1%

Joueurs célèbres

Champions du monde dans cette position

Ju, Wenjun — 1 partie
Anand, Viswanathan — 1 partie
Carlsen, Magnus — 1 partie

Parties historiques

6.Nbd2 — 64.6% (518 parties)

1953 — Sajtar, Jaroslav vs Hofmann, Vilem — 1/2-1/2 — Prague CZE
1954 — Lubensky, Vitaly vs Khavin, Abram Leonidovich — 1-0 — ?
1954 — Gardner, Kenneth L vs Tarnofsky, Victor — 1-0 — West London CC, London
1958 — Shishkin, Vladimir vs Spassky, Boris V. — 1/2-1/2 — Rostov on Don
1960 — Anastassopulos, Anastasios vs Clarke, Peter — 0-1 — Leipzig GER

6.Nc3 — 12.8% (103 parties)

1956 — Dozsa, Paul vs Szekely, Janos Ferenc — 1-0 — Debrecen HUN
1958 — Golovko, N. vs Estrin, Boris — 1-0 — Moscow ch sf
1966 — Jakobsen, Ole vs Brinck-Claussen, Bjorn — 0-1 — Aarhus DEN
1969 — Bukal, Vladimir Jr. vs Podkrajsek, Janez — 1-0 — Pula CRO
1976 — Csom, Istvan vs Tukmakov, Vladimir B — 1/2-1/2 — Erevan ARM

6.c3 — 7.1% (57 parties)

1962 — Borloy, Karoly vs Portisch, Lajos — 0-1 — Budapest HUN
1978 — Lebredo Zaragoitia, Gerardo vs Damjanovic, Marko — 1-0 — Vilnius LTU
1978 — Salonen, Jyrki vs Binham, Timothy F. — 1-0 — Helsinki FIN
1978 — Bielicki, Carlos vs Seidler, Aldo E. — 0-1 — Buenos Aires ch-ARG
1979 — Crispino Giuseppe vs Passerotti, Pierluigi — 0-1 — San Marino tt

6.c4 — 6.1% (49 parties)

1955 — Behrensen, Jorge vs Maderna, Carlos — 1/2-1/2 — Argentina
1965 — Morgan, Anthony vs Skorob, E — 0-1 — Sinaia
1979 — Jensen, Soren Holm vs Jelling, Erik — 0-1 — Jun. VM-kval. Odense, Odense
1983 — Hofmann, Michael vs Domont, Alexandre — 0-1 — Biel SUI
1985 — Roth, Norbert vs Rother, Christoph — 1/2-1/2 — Ansbach

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