A50d — Indian: Mexican Defence, 3.Nf3 d6

1.d4 Nf6 2.c4 Nc6 3.Nf3 d6 * ○ Trait aux Blancs

Ouverture — Centre mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

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Plans. Nc3 (Développer b1 — 70 % des parties) ; d5 (Occuper le centre — 14 % des parties) ; g3 (Préparer le fianchetto — 11 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

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Plans. ...e5 (Occuper le centre — 48 % des parties) ; ...Bg4 (Fou actif (mobilité 7), Développer c8 — 17 % des parties) ; ...g6 (Préparer le fianchetto — 14 % des parties) ; ...Ne5 (Cavalier centralisé en e5 — 12 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	—	● c7→d6, e7→d6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● g5 (2v0)	● g4 (2v0)
Cases faibles	—	—
Centre	● d4 (2v1)	● e4 (1v0)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
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	5 (● b1, ● c1, ● f1, ● a1, ● h1)	4 (● 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	● c4-c5	● …d6-d5, ● …e7-e5

Partie
1923 Maehrisch Ostrau – Round 12 – Tarrasch, Siegbert – 1-0 – Master Walter Aira – G71 1. d4 Nc6 2. Nf3 Nf6 3. c4 d6 4. Nc3 Bg4 5. e3 e5 6. Be2 exd4 7. exd4 Be7 8. O-O O-O 9. Be3 Re8 10. h3 Bh5
1941 Ventnor City – Round 8 – Bernstein, Sidney – 1-0 – Mengarini, Ariel – G26 1. Nf3 Nf6 2. c4 d6 3. d4 Nc6 4. g3 Bg4 5. Bg2 e5 6. d5 Ne7 7. O-O Qd7 8. Qb3 b6 9. Nc3 Ng6 10. Qb5 Be7
1955 Manhattan CC Ch 5556 – Round 12 – Kevitz, Alexander – 1/2-1/2 – Bernstein, Sidney – G56 1. Nf3 Nf6 2. c4 Nc6 3. d4 d6 4. d5 Ne5 5. Nxe5 dxe5 6. Nc3 e6 7. e4 Bc5 8. Be2 O-O 9. O-O h6 10. Qc2 Bd7
1956 Dresden – Round 12 – Golz, Werner – 1/2-1/2 – Trajkovic, Dusan – G74 1. d4 Nf6 2. c4 Nc6 3. Nf3 d6 4. Nc3 Bg4 5. e3 e5 6. Be2 Be7 7. O-O O-O 8. d5 Nb8 9. e4 a5 10. Ne1 Bxe2
1957 New Jersey State Ch Open – Round 2 – Sherwin, James T – 1-0 – Durkin, Robert – G9 1. d4 Nf6 2. c4 Nc6 3. Nf3 d6 4. g3 Bf5 5. Bg2 Qd7 6. h3 Bxb1 7. Rxb1 Qf5 8. Be3 g6 9. O-O Bg7 10. d5 Ne5
1967 FRG Ch Kiel GER – Round 1 – Delander, Adolf – 1/2-1/2 – Besser, Hans – G2 1. d4 Nf6 2. c4 d6 3. Nf3 Nc6 4. Nc3 g6 5. h3 Bg7 6. e4 O-O 7. Be2 a6 8. O-O Nd7 9. Bg5 h6 10. Bh4 g5
1967 URS Team Ch – Round 1 – Petrosian, Tigran V – 1-0 – Nevednichy, Boris M – G37 1. d4 Nf6 2. c4 Nc6 3. Nf3 d6 4. Nc3 Bg4 5. d5 Nb8 6. h3 Bh5 7. g4 Bg6 8. Nh4 Ne4 9. Nxg6 Nxc3 10. Qb3 hxg6
1968 Yugoslavia – Round 1 – Bozic, Aleksandar – 1-0 – Trajkovic, Mihajlo – G10 1. d4 Nf6 2. Nf3 d6 3. c4 Nc6 4. d5 Ne5 5. Nxe5 dxe5 6. Nc3 e6 7. e4 Be7 8. Be2 O-O 9. O-O h6 10. Be3 exd5
1969 Sarajevo – Round 8 – Uhlmann, Wolfgang – 1/2-1/2 – Lutikov, Anatoly S – G58 1. d4 Nf6 2. c4 Nc6 3. Nf3 d6 4. d5 Ne5 5. Nxe5 dxe5 6. Nc3 e6 7. e4 Bc5 8. Be2 O-O 9. O-O exd5 10. cxd5 Bd4
World Blitz 2023 – Round 5.44 – Omonov, Asrorjon – 1/2-1/2 – Demchenko, Aleksandr – G299 1. d4 Nf6 2. c4 d6 3. Nf3 Nc6 4. Bf4 g6 5. Nc3 Bg7 6. e3 O-O 7. h4 Bf5 8. Be2 Ne4 9. Nxe4 Bxe4 10. O-O e5

A50d — Mexican Defence (1923)

1.d4 Nf6 2.c4 Nc6 3.Nf3 d6

Les coups candidats

4.Nc3 — 69.7% (591 parties)

Ambassadeurs : Gregory, Stephen J (13x), Jongsma, Alexander (12x), Braun, Gottfried, Dr. (10x), Van Geet, Dirk Daniel (5x), Gregory, Samuel David (5x), Mirzoev, Emil (5x), Krajnak, Martin (4x), Lundberg, Alf W. (4x)

4.d5 — 13.6% (115 parties)

Ambassadeurs : Miroshnichenko, Evgenij (3x), Heberla, Bartlomiej (3x), Gazik, Viktor (3x), Uhlmann, Wolfgang (2x), Lutikov, Anatoly S (2x), Gregory, Samuel David (2x), Bivol, Alina (2x), Alexandrov, Bianca Alberta (1x)

4.g3 — 11.4% (97 parties)

Ambassadeurs : Snarheim, Dagfinn (5x), Moen, Andreas G.R. (2x), Hagesather, Halvard (2x), Kondenko, Alexey (2x), Braun, Gottfried, Dr. (2x), Jongsma, Alexander (2x), Atikankhotchasee, Manunthon (2x), Sherwin, James T (1x)

4.Bf4 — 1.9% (16 parties)

Ambassadeurs : Belamaric, Goran (2x), Ejera, Kirby (1x), Taylor, Dagbjartur (1x), Szabo, Laszlo (1x), Berkes, Ferenc (1x), Soln, Primoz (1x), Sarakauskas, Gediminas (1x), Slapikas, Vytautas (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	4.Nc3	4.d5	4.g3	4.Bf4
<1800	33	76%	3%	9%	6%
1800-2200	339	69%	14%	13%	2%
2200-2600	353	70%	16%	12%	1%
2600+	4	50%	25%	—	—

Évolution par décennie (% des parties)

Décennie	N parties	4.Nc3	4.d5	4.g3	4.Bf4
1950s	7	57%	29%	14%	—
1960s	14	64%	21%	—	7%
1970s	23	83%	4%	13%	—
1980s	24	67%	29%	—	—
1990s	126	66%	17%	13%	1%
2000s	221	75%	9%	10%	1%
2010s	342	68%	13%	13%	3%
2020s	91	67%	20%	9%	2%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
4.Nc3	68%	67%	▼ -1.1%
4.d5	13%	20%	▲ +6.9%
4.g3	13%	9%	▼ -4.4%
4.Bf4	3%	2%	-0.4%

Parties historiques

4.Nc3 — 69.7% (591 parties)

1955 — Bratoszewski, Jerzy vs Szapiro, Grzegorz — 0-1 — Poland ch13
1956 — Golz, Werner vs Talevski, Mihajlo — 1/2-1/2 — It Dresden GER
1956 — Kluger, Gyula vs Szapiro, Gedali — 0-1 — Warsaw POL
1959 — Jongsma, Alexander vs Van den Bosch, Johannes — 1/2-1/2 — Hilversum tt
1961 — Jezek, Jaroslav vs Talevski, Mihajlo — 1-0 — corr FS

4.d5 — 13.6% (115 parties)

1955 — Kevitz, Alexander vs Bernstein, Sidney — 1/2-1/2 — New York, NY USA
1957 — Fielding, Gerald vs Durkin, Robert — 1-0 — Cleveland, OH USA
1968 — Alexandrov, Bianca Alberta vs Talevski, Mihajlo — 1-0 — Yugoslavia
1969 — Uhlmann, Wolfgang vs Lutikov, Anatoly S — 1/2-1/2 — Sarajevo BIH
1969 — Uhlmann, Wolfgang vs Lutikov, Anatoly S — 1/2-1/2 — Sarajevo BIH

4.g3 — 11.4% (97 parties)

1957 — Sherwin, James T vs Durkin, Robert — 1-0 — East Orange
1972 — Ocampo Vargas, Raul vs Bulcourf, Carlos Enrique — 1-0 — Mar del Plata ARG
1977 — Akshaya R.S. vs Rosell, Percy — 1/2-1/2 — Snekkersten
1979 — Bentzen, Eric vs Haahr, Thorkild — 0-1 — ?
1992 — Schoene, Ralf vs Braun, Gottfried, Dr. — 1/2-1/2 — GER

4.Bf4 — 1.9% (16 parties)

1965 — Ejera, Kirby vs Taylor, Dagbjartur — 1-0 — Illinois Open
1997 — Szabo, Laszlo vs Berkes, Ferenc — 0-1 — Salgotarjan
2000 — Soln, Primoz vs Belamaric, Goran — 1-0 — SLO-chT Bled
2003 — Sarakauskas, Gediminas vs Slapikas, Vytautas — 1/2-1/2 — Lithuania
2009 — Ginderskov, Henrik vs Evans, Stanley W — 1-0 — ?