Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	● c4, ● c5
Pions isolés	—	—
Arriérés	—	—
Chaînes	—	—
Passés	—	—
Majorité	—	● aile dame 4v2

Cases

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

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● c	● d

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bf1	● Bf1 Non développé (mob. 0)
Bc8		● Bc8 Non développé (mob. 5)
Bf8		● Bf8 Non développé (mob. 0)
Paire de fous	● Oui	● Oui
Non développées	4 (● c1, ● f1, ● a1, ● h1)	6 (● b8, ● g8, ● 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	● d2-d3, ● d2-d4	● …c4-c3

A09q — Reti: Accepted, 3.Na3 c5

1.Nf3 d5 2.c4 dxc4 3.Na3 c5 * ○ Trait aux Blancs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plans. Nxc4 (Cavalier actif en c4 — 88 % des parties) ; g3 (Préparer le fianchetto — 9 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plans. ...Nc6 (Développer b8 — 87 % des parties) ; ...g6 (Préparer le fianchetto — 5 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Partie
1926 Budapest – Round 4 – Reti, Richard – 1-0 – Havasi, Kornel – G30 1. Nf3 d5 2. c4 dxc4 3. Na3 c5 4. Nxc4 Nc6 5. g3 f6 6. Bg2 Nh6 7. O-O e5 8. d3 Nf7 9. Be3 Be7 10. Rc1 O-O
1926 Hastings Premier /27 7th – Round 2 – Reti, Richard – 1-0 – Thomas, George Alan – G9 1. Nf3 d5 2. c4 dxc4 3. Na3 c5 4. Nxc4 Nc6 5. g3 f6 6. Bg2 e5 7. d3 Nge7 8. O-O Be6 9. Nfd2 Qd7 10. f4 exf4
1926 Hastings2627 – Round ? – Réti, Richard – 1-0 – Thomas, George Alan – G11 1. Nf3 d5 2. c4 dxc4 3. Na3 c5 4. Nxc4 Nc6 5. g3 f6 6. Bg2 e5 7. d3 Nge7 8. O-O Be6 9. Nfd2 Qd7 10. f4 exf4
1926 Semmering – Round 14 – Reti, Richard – 0-1 – Nimzowitsch, Aron – G120 1. Nf3 d5 2. c4 dxc4 3. Na3 c5 4. Nxc4 Nc6 5. b3 e5 6. Qc2 f6 7. Bb2 Bg4 8. Rc1 Qd7 9. Ne3 Be6 10. Qb1 Nh6
1931 Bled – Round 1 – Kashdan, Isaac – 1-0 – Nimzowitsch, Aaron – G129 1. Nf3 d5 2. c4 dxc4 3. Na3 c5 4. g3 Nc6 5. Nxc4 f6 6. Bg2 e5 7. d3 Be6 8. O-O Nge7 9. Nfd2 Nd5 10. Ne4 Be7
1936 Nottingham – Round ? – Botvinnik, Mikhail – 1/2-1/2 – Fine, Reuben – G115 1. Nf3 d5 2. c4 dxc4 3. Na3 c5 4. Nxc4 Nc6 5. b3 f6 6. Bb2 e5 7. g3 Nge7 8. Bg2 Nd5 9. O-O Be7 10. Nh4 O-O
1936 Nottingham – Round 1 – Botvinnik, Mikhail – 1/2-1/2 – Fine, Reuben – G55 1. Nf3 d5 2. c4 dxc4 3. Na3 c5 4. Nxc4 Nc6 5. b3 f6 6. Bb2 e5 7. g3 Nge7 8. Bg2 Nd5 9. O-O Be7 10. Nh4 O-O
1937 Semmering – Round 1 – Keres, Paul – 1/2-1/2 – Fine, Reuben – G13 1. Nf3 d5 2. c4 dxc4 3. Na3 c5 4. Nxc4 Nc6 5. Nce5 Nxe5 6. Nxe5 Nf6 7. e3 e6 8. b3 Nd7 9. Bb5 Bd6 10. Bb2 O-O
1937 Semmering/Baden – Round 3 – Keres, Paul Petrovich – 1/2-1/2 – Fine, Reuben – G11 1. Nf3 d5 2. c4 dxc4 3. Na3 c5 4. Nxc4 Nc6 5. Nce5 Nxe5 6. Nxe5 Nf6 7. e3 e6 8. b3 Nd7 9. Bb5 Bd6 10. Bb2 O-O
1949 Trencianske Teplice – Round 13 – Ojanen, Kaarle S – 0-1 – Szabo, Laszlo – G80 1. Nf3 d5 2. c4 dxc4 3. Na3 c5 4. Nxc4 Nc6 5. e3 Nf6 6. b3 g6 7. Bb2 Bg7 8. Nce5 Nxe5 9. Bxe5 O-O 10. Be2 Bf5
1963 Halle zt – Round 1 – Doda, Zbigniew – 1-0 – Kavalek, Lubomir – G117 1. Nf3 d5 2. c4 dxc4 3. Na3 c5 4. Nxc4 Nc6 5. g3 f6 6. Bg2 e5 7. O-O Be6 8. d3 Nge7 9. Qa4 Rb8 10. Ne3 Qd7
1964 URS – Round ? – Chistiakov, Alexander – 1-0 – Gulko, Boris – G35 1. Nf3 d5 2. c4 dxc4 3. Na3 c5 4. Nxc4 Nc6 5. b3 e5 6. Bb2 f6 7. e3 Nh6 8. d3 Be7 9. Be2 O-O 10. a3 Nf5
1965 Novi Sad – Round 10 – Nikolac, Juraj – 1-0 – Buljovcic, Ivan – G89 1. Nf3 d5 2. c4 dxc4 3. Na3 c5 4. g3 g6 5. Bg2 Bg7 6. Nxc4 Nc6 7. d3 Nf6 8. Be3 Nd4 9. Nxd4 cxd4 10. Bd2 O-O
1969 URS Ch sf – Round ? – Gipslis, Aivars – 1-0 – Ustinov, Georgy I – G19 1. Nf3 d5 2. c4 dxc4 3. Na3 c5 4. Nxc4 Nc6 5. g3 Nf6 6. Bg2 g6 7. b3 Bg7 8. Bb2 O-O 9. Nfe5 Nxe5 10. Bxe5 Ne8

A09q — Reti: Accepted (1926)

1.Nf3 d5 2.c4 dxc4 3.Na3 c5

Les coups candidats

4.Nxc4 — 88.4% (183 parties)

Ambassadeurs : Garcia Palermo, Carlos Horacio (6x), Choma, Ernani Francisco (4x), Yakovich, Yuri (3x), Sadler, Matthew D (3x), Nyback, Tomi (3x), Feustel, Bernd (2x), Vadasz, Laszlo (2x), Groszpeter, Attila (2x)

4.g3 — 8.7% (18 parties)

Ambassadeurs : Rublevsky, Sergei (2x), Nikolac, Juraj (1x), Buljovcic, Ivan (1x), Dors, Ryszard (1x), Kaminski, Stefan (1x), Neverov, Valeriy (1x), Muhamedzjanov, Nail (1x), Arkell, Keith C (1x)

4.e3 — 2.4% (5 parties)

Ambassadeurs : Diogenes, Jarlene Meyre (1x), Gandalf (1x), Duffau, Pascal (1x), Villeneuve, Alain (1x), Muse, Drazen (1x), Shapiro, Yosip (1x), Czibulka, Zoltan Dr. (1x), Kovacs, Marton (1x)

4.Qa4+ — 0.5% (1 parties)

Ambassadeurs : Maxwell, Daniel (1x), Van den Bersselaar, Jeroen (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	4.Nxc4	4.g3	4.e3	4.Qa4+
<1800	2	100%	—	—	—
1800-2200	53	91%	6%	2%	2%
2200-2600	109	86%	11%	3%	—

Évolution par décennie (% des parties)

Décennie	N parties	4.Nxc4	4.g3	4.e3	4.Qa4+
1950s	1	100%	—	—	—
1960s	4	75%	25%	—	—
1970s	6	100%	—	—	—
1980s	31	90%	10%	—	—
1990s	86	87%	10%	1%	1%
2000s	46	91%	4%	4%	—
2010s	23	96%	—	4%	—
2020s	10	60%	30%	10%	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
4.Nxc4	96%	60%	▼ -35.7%
4.g3	0%	30%	▲ +30.0%
4.e3	4%	10%	▲ +5.7%
4.Qa4+	0%	0%	+0.0%

Parties historiques

4.Nxc4 — 88.4% (183 parties)

1955 — Bak, Istvan vs Keres, Paul Petrovich — 1/2-1/2 — Budapest HUN
1963 — Doda, Zbigniew vs Kavalek, Lubomir — 1-0 — Halle zt
1964 — Chistiakov, Alexander vs Gulko, Boris — 1-0 — URS
1969 — Gipslis, Aivars vs Ustinov, Georgy I — 1-0 — Kiev UKR
1971 — Brodie, Hugh vs Billyard, Ron — 1-0 — Canada

4.g3 — 8.7% (18 parties)

1965 — Nikolac, Juraj vs Buljovcic, Ivan — 1-0 — Novi Sad SRB
1987 — Dors, Ryszard vs Kaminski, Stefan — 1-0 — J.T.Befama
1988 — Neverov, Valeriy vs Muhamedzjanov, Nail — 1-0 — Naberezhnie Chelni
1988 — Arkell, Keith C vs Jackson, Sheila — 1-0 — Duncan Lawrie
1991 — Karkanaqe, Ilir vs Velikov, Petar — 1/2-1/2 — Hania

4.e3 — 2.4% (5 parties)

1995 — Diogenes, Jarlene Meyre vs Gandalf — 0-1 — ?
2001 — Duffau, Pascal vs Villeneuve, Alain — 1-0 — St-Chely d'Aubrac FRA
2005 — Muse, Drazen vs Shapiro, Yosip — 1-0 — Berlin GER
2015 — Czibulka, Zoltan Dr. vs Kovacs, Marton — 1/2-1/2 — Level
2022 — Kusa, Jakub vs Langner, Ladislav — 1/2-1/2 — Czech Republic CZE

4.Qa4+ — 0.5% (1 parties)

1994 — Maxwell, Daniel vs Van den Bersselaar, Jeroen — 1/2-1/2 — Nederland tt

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