A04y — Reti: 1…c5

1.Nf3 c5 2.g3 b6 3.Bg2 Bb7 * ○ Trait aux Blancs

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 — 72 % des parties) ; c4 (Frapper le centre adverse — 19 % des parties) ; d3 (Solidifier le centre — 6 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

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Plans. ...Nf6 (Développer g8 — 68 % des parties) ; ...g6 (Préparer le fianchetto — 19 % des parties) ; ...e6 (Solidifier le centre, libérer le fou — 9 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→g3, h2→g3	● b6→c5, a7→b6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	—	—
Cases faibles	—	—
Centre	● e5 (1v0)	● d5 (1v0), ● e4 (1v0)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bg2	● Bg2 Ok (mob. 2)
Bb7		● Bb7 Actif (mob. 6)
Bf8		● Bf8 Non développé (mob. 0)
Paire de fous	● Oui	● Oui
Non développées	4 (● b1, ● c1, ● a1, ● h1)	5 (● b8, ● g8, ● 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	● d2-d4	—

Partie
1944 La Plata Jockey Club – Round 10 – Pelikan, Jorge – 1-0 – Villegas, Benito – G12 1. Nf3 c5 2. g3 b6 3. Bg2 Bb7 4. O-O d6 5. d3 Nd7 6. e4 g6 7. Nc3 Bg7 8. Ne1 e6 9. f4 Ne7 10. Nb5 Nc8
1947 Mar del Plata – Round 17 – Iliesco, Juan – 1/2-1/2 – Stahlberg, Gideon – G149 1. Nf3 c5 2. g3 b6 3. Bg2 Bb7 4. O-O Nf6 5. d4 cxd4 6. Qxd4 e6 7. c4 Nc6 8. Qd1 Be7 9. Nc3 O-O 10. b3 Qc8
1951 San Rafael – Round 11 – Eliskases, Erich – 1-0 – Corte, Cesar J – G10 1. Nf3 c5 2. g3 b6 3. Bg2 Bb7 4. O-O Nf6 5. d3 d6 6. e4 Nbd7 7. c4 g6 8. Ne1 Qc7 9. f4 Bg7 10. Nc3 O-O
1956 Moskou olm – Round 2 – Barcza, Gedeon – 1-0 – Wade, Robert G – G4 1. Nf3 c5 2. g3 b6 3. Bg2 Bb7 4. O-O f5 5. d4 Nf6 6. c4 e6 7. d5 exd5 8. Nh4 g6 9. Nc3 Be7 10. Nxd5 Nxd5
1958 Clare Benedict Cup 05th – Round 4 – Albareda, Miguel – 1/2-1/2 – Scafarelli, Francesco – G29 1. Nf3 c5 2. g3 b6 3. Bg2 Bb7 4. O-O Nf6 5. c3 g6 6. d4 cxd4 7. cxd4 Bg7 8. Bf4 O-O 9. Qc1 Na6 10. Nc3 Rc8
1968 Islington Open 4th – Round 1 – Friedlander, Ivor Adrian – 1/2-1/2 – Wade, Robert G – G2 1. Nf3 c5 2. g3 b6 3. Bg2 Bb7 4. O-O g6 5. d3 Bg7 6. c4 Nh6 7. Nc3 Nf5 8. e4 Nd4 9. Nxd4 cxd4 10. Ne2 d6
1968 Monte Carlo – Round 2 – Forintos, Gyozo V – 0-1 – Larsen, Bent Ravn – G15 1. Nf3 c5 2. g3 b6 3. Bg2 Bb7 4. O-O g6 5. d3 Bg7 6. e4 Nc6 7. Nc3 d6 8. Be3 Nf6 9. Qc1 h6 10. h3 e5
World Blitz 2017 – Round 4.1 – Anton Guijarro, David – 0-1 – Carlsen, Magnus – G174 1. Nf3 b6 2. g3 Bb7 3. Bg2 c5 4. O-O g6 5. d3 Bg7 6. e4 d6 7. c3 Nf6 8. Nbd2 O-O 9. Re1 Nc6 10. a3 Nd7

A04y —

1.Nf3 c5 2.g3 b6 3.Bg2 Bb7

Les coups candidats

4.O-O — 72.3% (1844 parties)

Ambassadeurs : Kirov, Nino (15x), Wojtkiewicz, Aleksander (13x), Gutman, Lev (12x), Suba, Mihai (11x), Browne, Walter Shawn (10x), Loginov, Valery A (10x), Szmetan, Jorge (8x), Gutman, Leni (7x)

4.c4 — 19.1% (486 parties) →

Ambassadeurs : Kengis, Edvins (9x), Velickovic, Zoran (5x), Bozinovic, Bogdan (5x), Poley, Vladimir (4x), Giffard, Nicolas (4x), Ianov, Viktor (4x), Voyska, Margarita (4x), Nakamura, Hikaru (4x)

4.d3 — 5.9% (150 parties)

Ambassadeurs : Kovacevic, Slobodan (5x), Ulybin, Mikhail (2x), Gregori, Giacomo (2x), Cocchi, Andrea (2x), Schmid, Michael (2x), Pestic, R. (1x), Bernstein, Sidney (1x), McDonald, Nathan (1x)

4.b3 — 2.0% (50 parties)

Ambassadeurs : Georgieva, Emilia (2x), Telljohann, Sven (2x), Andersson, Ulf (1x), Miles, Anthony J (1x), Ross, David (1x), Spraggett, Kevin (1x), Weinsanto, Marc (1x), Prie, Eric (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	4.O-O	4.c4	4.d3	4.b3
<1800	51	67%	20%	10%	2%
1800-2200	783	70%	19%	8%	2%
2200-2600	1421	75%	19%	4%	2%
2600+	17	29%	71%	—	—

Évolution par décennie (% des parties)

Décennie	N parties	4.O-O	4.c4	4.d3	4.b3
1940s	2	100%	—	—	—
1950s	3	100%	—	—	—
1960s	8	88%	12%	—	—
1970s	56	71%	20%	7%	2%
1980s	249	78%	17%	3%	2%
1990s	578	75%	15%	7%	2%
2000s	742	73%	18%	6%	2%
2010s	759	67%	24%	6%	2%
2020s	152	75%	20%	3%	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
4.O-O	67%	75%	▲ +7.8%
4.c4	24%	20%	▼ -3.2%
4.d3	6%	3%	▼ -3.6%
4.b3	2%	0%	▼ -2.1%

Joueurs célèbres

Champions du monde dans cette position

Ding, Liren — 1 partie
Ju, Wenjun — 1 partie
Carlsen, Magnus — 1 partie

Parties historiques

4.O-O — 72.3% (1844 parties)

1944 — Pelikan, Jorge vs Villegas, Benito — 1-0 — La Plata Jockey Club
1947 — Iliesco, Juan vs Stahlberg, Gideon — 1/2-1/2 — Mar del Plata ARG
1951 — Eliskases, Erich vs Corte, Cesar J — 1-0 — San Rafael
1956 — Barcza, Gedeon vs Wade, Robert G — 1-0 — Moscow RUS
1958 — Albareda, Miguel vs Scafarelli, Francesco — 1/2-1/2 — Chaumont Neuchatel

4.c4 — 19.1% (486 parties)

1966 — Varnusz, Egon vs Csom, Istvan — 1-0 — HUN
1971 — Satanove, Harry vs Maloney, Pat — 1-0 — Portland, OR USA
1972 — Rukavina, Josip vs Planinec, Albin — 1/2-1/2 — Umag CRO
1974 — Langeweg, Kick vs Bellon Lopez, Juan Manuel — 1/2-1/2 — Torremolinos ESP
1975 — Pinto Paiva, Jose vs Araujo, Rodolfo — 0-1 — Caxias do Sul BRA

4.d3 — 5.9% (150 parties)

1971 — Mazzoleni, Julio vs Pelikan, Jorge — 1-0 — Villa Gesell ARG
1978 — Pestic, R. vs Bernstein, Sidney — 0-1 — New York, NY USA
1978 — Hesse, Peter vs Espig, Thomas — 1/2-1/2 — Eggesin GER
1978 — Grant Enos vs Canda, Danilo — 1/2-1/2 — Buenos Aires ARG
1983 — Plachetka, Jan vs Schneider, Attila — 1/2-1/2 — Tatran Cup Stary Smokovec SVK

4.b3 — 2.0% (50 parties)

1977 — Rossetto, Hector vs Szmetan, Jorge — 1-0 — Buenos Aires ARG
1980 — Andersson, Ulf vs Miles, Anthony J — 1-0 — La Valetta
1986 — Ross, David vs Spraggett, Kevin — 0-1 — Vancouver Keres mem
1987 — Trikaliotis, Georgios vs Grivas, Efstratios — 0-1 — Athens GRE
1989 — Weinsanto, Marc vs Prie, Eric — 0-1 — Uzes op