A25t — English: Closed, 5.e4

1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e4 * ● Trait aux Noirs

Ouverture — Centre fermé

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plans. Nge2 (Développer g1 — 83 % des parties) ; d3 (Solidifier le centre — 15 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plans. ...d6 (Libérer Bc8 — 78 % des parties) ; ...Nge7 (Développer g8 — 18 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Structure de pions

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

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● b5 (2v0), ● d5 (3v0)	● d4 (2v0)
Cases faibles	—	—
Centre	● d5 (3v0), ● e4 (2v0)	● d4 (2v0), ● e5 (2v0)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 0)
Bg2	● Bg2 Ok (mob. 3)
Bg7		● Bg7 Ok (mob. 3)
Bc8		● Bc8 Non développé (mob. 0)
Paire de fous	● Oui	● Oui
Non développées	4 (● g1, ● c1, ● a1, ● h1)	4 (● g8, ● c8, ● 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	fermé
Ruptures	● d2-d4, ● f2-f4	● …d7-d5, ● …f7-f5

Partie
1961 Palanga Baltic Ch – Round ? – Buslaev, Aleksander – 0-1 – Maslov, Leonid P – G1 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e4 Nh6 6. Nge2 O-O 7. O-O d6 8. d3 f5 9. h3 f4 10. gxf4 Qh4
1967 Invitational - M.I – Round 5 – Hoppe, Roy – 0-1 – Blackstone, John – G7 1. c4 g6 2. g3 Bg7 3. Bg2 e5 4. Nc3 Nc6 5. e4 d6 6. Nge2 f5 7. d3 Nf6 8. O-O O-O 9. f4 Be6 10. Rb1 fxe4
1968 CSR Ch – Round 3 – Filip, Miroslav – 1-0 – Blatny, Frantisek – G19 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e4 d6 6. Nge2 Be6 7. Nd5 Nce7 8. d4 c5 9. dxc5 dxc5 10. O-O Nc6
1968 Hungary – Round 1 – Sapi, Laszlo – 0-1 – Haag, Ervin – G9 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e4 d6 6. Nge2 h5 7. d3 h4 8. f3 Nd4 9. Nxd4 exd4 10. Ne2 a5
34. ECC Open 2018 – Round 7.1 – Romanov, Egor S. – 1/2-1/2 – Alekseenko, Kirill – G199 1. c4 e5 2. g3 Nc6 3. Nc3 g6 4. Bg2 Bg7 5. e4 d6 6. Nge2 h5 7. h4 Nf6 8. d3 Nh7 9. Nd5 a5 10. Be3 Nd4
6. World Blitz 2010 – Round 15.3 – Grischuk, Alexander – 1-0 – Svidler, Peter – G102 1. c4 g6 2. g3 Bg7 3. Bg2 Nc6 4. Nc3 e5 5. e4 d6 6. Nge2 Be6 7. d3 Qd7 8. Nd5 Nd8 9. d4 c6 10. Ne3 exd4
Brasilia 1981 – Round 1 – Filguth, Rubens Alberto – 1/2-1/2 – Ljubojevic, Ljubomir – G1 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e4 d6 6. Nge2 a6 7. d3 Rb8 8. O-O b5 9. b3 Nge7 10. Be3 O-O
FIDE Grand Swiss 2025 – Round 9 – Ponomariov Ruslan – 1/2-1/2 – Vitiugov Nikita – G489 1. c4 e5 2. g3 Nc6 3. Bg2 g6 4. Nc3 Bg7 5. e4 d6 6. Nge2 f5 7. d3 Nf6 8. O-O O-O 9. Nd5 Be6 10. Bg5 Qd7
Interpolis 1979 – Round 6 – Portisch, Lajos – 1/2-1/2 – Sax, Gyula – G25 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e4 d6 6. Nge2 f5 7. d3 Nh6 8. h4 Nf7 9. h5 g5 10. exf5 Bxf5
Manila Interzonal 1976 – Round 13 – Hort, Vlastimil – 1-0 – Browne, Walter Shawn – G55 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e4 Nge7 6. Nge2 O-O 7. d3 d6 8. O-O f5 9. h3 Be6 10. Nd5 Qd7

A25t — Closed (1961)

1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e4

Les coups candidats

5…d6 — 78.5% (2353 parties)

Ambassadeurs : Löschnauer, Rüdiger (21x), Salzmann, Stefan (20x), Lanzani, Paolo (20x), Lauer, Roland (20x), Palladino, Mario (20x), Keber, Ernst (20x), Bischoff, Klaus (14x), Koshy, Varugeese (12x)

5…Nge7 — 17.6% (528 parties)

Ambassadeurs : Bischoff, Klaus (5x), Norberg, Johan (5x), Volosin, Vladimir (4x), Westerman, Henk (3x), Grant, Jonathan I M (3x), Whitehead, Mark A (3x), Wadsworth, Matthew J (3x), Weijerstrass, Ronald (2x)

5…Nf6 — 1.4% (42 parties)

Ambassadeurs : Henkes, Houston (1x), Smyth, Peter (1x), Rogule, Laura (1x), Ghurchumalidze, Teona (1x), Slepanek, Jan (1x), Novacek, Pavel (1x), Navabi, Shirin (1x), Horvath, Maria (1x)

5…Nd4 — 1.2% (37 parties)

Ambassadeurs : Westerinen, Heikki M.J. (2x), Liebert, Heinz (1x), Blatny, Frantisek (1x), Kazoks, Aivars (1x), Rasmussen, Peter (1x), Sielecki, Christof (1x), Fegebank, Fritz (1x), Mroz, Aleksandra (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	5…d6	5…Nge7	5…Nf6	5…Nd4
<1800	136	73%	21%	4%	1%
1800-2200	1411	76%	20%	2%	1%
2200-2600	1139	83%	14%	0%	1%
2600+	16	88%	—	—	—

Évolution par décennie (% des parties)

Décennie	N parties	5…d6	5…Nge7	5…Nf6	5…Nd4
1950s	1	—	100%	—	—
1960s	14	86%	7%	—	—
1970s	42	81%	17%	—	2%
1980s	122	74%	25%	—	—
1990s	430	74%	21%	2%	1%
2000s	933	80%	17%	1%	1%
2010s	1262	80%	15%	2%	2%
2020s	192	76%	21%	1%	2%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
5…d6	80%	76%	▼ -3.8%
5…Nge7	15%	21%	▲ +5.4%
5…Nf6	2%	1%	▼ -1.4%
5…Nd4	2%	2%	+0.1%

Joueurs célèbres

Champions du monde dans cette position

Ju, Wenjun — 2 parties
Botvinnik, Mikhail — 1 partie

Parties historiques

5…d6 — 78.5% (2353 parties)

1964 — Eliskases, Erich vs Rapaka Samuel Paul — 1/2-1/2 — Tel Aviv olm
1966 — Pugach, Mario vs Rubinetti, Jorge — 1/2-1/2 — Buenos Aires ch-ARG
1966 — Radulov, Ivan vs Jakobsen, Ole — 1/2-1/2 — WchTJ U26 fin-A
1967 — Benko, Pal vs Szabo, Laszlo — 1/2-1/2 — Winnipeg CAN
1967 — Hoppe, Roy vs Blackstone, John — 0-1 — San Francisco, Ca

5…Nge7 — 17.6% (528 parties)

1955 — Wolk, Sigmund vs Scheipl, Ralf — 0-1 — Reichenbach
1968 — Ageichenko, Genadi A vs Skvortsov, Vladimir — 1-0 — Moscow RUS
1971 — Ermenkov, Evgenij vs Peev, Peicho — 1-0 — Sofia BUL
1973 — Schmidt, Wlodzimierz vs Ribli, Zoltan — 1-0 — Leipzig GER
1973 — Hort, Vlastimil vs Zinn, Lothar — 1-0 — Leipzig GER

5…Nf6 — 1.4% (42 parties)

1994 — Regan, Natasha K vs Allen Jones — 1/2-1/2 — Corr BLCCC
1995 — Greenhalgh, Thomas B vs Withers, James Francis — 0-1 — ?
1996 — Slepanek, Jan vs Novacek, Pavel — 0-1 — Moravia
1998 — Rogule, Laura vs Ghurchumalidze, Teona — 0-1 — Oropesa del Mar ESP
1998 — Navabi, Shirin vs Horvath, Maria — 0-1 — Elista RUS

5…Nd4 — 1.2% (37 parties)

1978 — Liebert, Heinz vs Blatny, Frantisek — 1-0 — Decin CZE
1993 — Mroz, Aleksandra vs Marczyk, Leonard — 1-0 — corr Poland
1994 — Kazoks, Aivars vs Rasmussen, Peter — 1-0 — Baltic Sea tt6 bd10
1999 — Sielecki, Christof vs Fegebank, Fritz — 1-0 — Recklinghausen GER
2000 — Jahr, Dieter vs Schueler, Wolfgang — 1/2-1/2 — Halle GER