A26u — English: Closed, 5.d3 d6 6.Nf3 Nf6 7.O-O O-O 8.Rb1 a5 9.a3 h6

1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.Nf3 Nf6 7.O-O O-O 8.Rb1 a5 9.a3 h6 * ○ Trait aux Blancs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Atouts. Les Blancs s'appuient sur les cases fortes e4, b5 et d5 et la paire de fous.

Côté adverse. Les fous enfermés en g7 et c8.

Plans. Bg5 (Clouer Nf6) ; h3 (Empêcher ...Bg4).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Atouts. Les Noirs s'appuient sur les cases fortes d4, g4 et f5, un avant-poste en d4 et la paire de fous.

Côté adverse. Les fous enfermés en c1 et g2.

En contrepartie. Plusieurs pièces dorment encore (le fou c8 et la tour a8).

Plans. ...Bg4 (Développer Bc8, clouer Nf3) ; ...d5 (Rupture) ; ...e4 (Rupture).

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● b2→a3, e2→d3, f2→g3, h2→g3, d3→c4	● d6→e5, c7→d6, f7→g6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● e4 (2v1), ● b5 (2v0), ● d5 (2v1)	● d4 (2v1), ● g4 (2v0), ● f5 (2v0)
Cases faibles	—	—
Centre	● d5 (2v1), ● e4 (2v1)	● d4 (2v1), ● e5 (2v1)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bg2	● Bg2 Enfermé (mob. 2)
Bg7		● Bg7 Enfermé (mob. 1)
Bc8		● Bc8 Non développé (mob. 5)
Paire de fous	● Oui	● Oui
Non développées	1 (c1)	2 (c8, a8)

Sécurité du roi

	♔ Blancs	♚ Noirs
Statut	● Roqué	● Roqué
Droits de roque	—	—

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	semi-ouvert
Ruptures	● c4-c5, ● d3-d4, ● e2-e3	● …d6-d5, ● …e5-e4

Partie
1955 Argentina – Round 15 – Behrensen, Jorge – 1/2-1/2 – Najdorf, Miguel – G112 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. c4 d6 6. Nc3 e5 7. d3 Nc6 8. Rb1 a5 9. a3 h6 10. b4 axb4
1955 Argentina – Round 3 – Palermo, Vicente – 0-1 – Idigoras, Gregorio – G19 1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. Nc3 Nc6 7. Rb1 a5 8. d3 e5 9. a3 h6 10. b4 axb4
1955 Gothenburg Interzonal – Round 3 – Pilnik, Herman – 1/2-1/2 – Najdorf, Miguel – G22 1. c4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. Nc3 e5 7. d3 Nc6 8. Rb1 a5 9. a3 h6 10. b4 axb4
1956 Alekhine Memorial – Round 1 – Pachman, Ludek – 1/2-1/2 – Najdorf, Miguel – G86 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. c4 d6 6. Nc3 Nc6 7. d3 e5 8. Rb1 a5 9. a3 h6 10. b4 axb4
1957 Mar del Plata – Round 7 – Behrensen, Joern – 1/2-1/2 – Wexler, Bernardo – G72 1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. Nc3 Nc6 7. d3 e5 8. Rb1 a5 9. a3 h6 10. b4 axb4
1961 Moscow Ch – Round ? – Shatskes, Boris A – 1/2-1/2 – Shamkovich, Leonid – G41 1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nf3 O-O 5. O-O Nc6 6. Nc3 d6 7. d3 e5 8. Rb1 a5 9. a3 h6 10. b4 Bg4
1962 Varna olm – Round 4 – Bouwmeester, Hans – 1/2-1/2 – Gudmundsson, Arinbjorn – G134 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. c4 O-O 5. O-O d6 6. Nc3 e5 7. d3 Nc6 8. Rb1 a5 9. a3 h6 10. b4 axb4
1964 Buenos Aires Ch – Round ? – Palermo, Vicente – 1/2-1/2 – Cruz, Raul C. – G69 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. c4 d6 6. Nc3 e5 7. d3 Nc6 8. Rb1 a5 9. a3 h6 10. b4 axb4
1966 WchT U26 fin-A 13th – Round 1 – Spiridonov, Nikola – 1-0 – Westerinen, Heikki M.J. – G1 1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nc3 O-O 5. Nf3 d6 6. O-O Nc6 7. Rb1 e5 8. d3 a5 9. a3 h6 10. b4 axb4
1969 Nordic Ch – Round 12 – Drimer, Dolfi – 1/2-1/2 – Andersson, Ulf 1949 – G33 1. g3 g6 2. Bg2 Bg7 3. d3 e5 4. c4 Nf6 5. Nc3 O-O 6. Nf3 d6 7. O-O Nc6 8. Rb1 a5 9. a3 h6 10. Ne1 Be6
1975 URS Team Ch – Round 2 – Polugaevsky, Lev – 0-1 – Korchnoi, Viktor – G25 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. d3 g6 5. g3 Bg7 6. Bg2 O-O 7. O-O d6 8. Rb1 a5 9. a3 h6 10. b4 axb4
6. World Blitz 2010 – Round 9.6 – Eljanov, Pavel – 1-0 – Nakamura, Hikaru – G58 1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. Nc3 Nc6 7. d3 e5 8. Rb1 a5 9. a3 h6 10. b4 axb4
Amber Blindfold 2002 – Round 9 – Piket, Jeroen – 0-1 – Morozevich, Alexander – G12 1. Nf3 Nc6 2. g3 e5 3. d3 g6 4. Bg2 Bg7 5. O-O h6 6. c4 d6 7. Nc3 Nf6 8. Rb1 a5 9. a3 O-O 10. b4 axb4
Bosna SuperGM 2000 – Round 4 – Bareev, Evgeny – 1-0 – Bacrot, Etienne – G15 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 g6 5. Bg2 Bg7 6. O-O O-O 7. d3 d6 8. Rb1 a5 9. a3 h6 10. b4 axb4
Cote d'Ivoire Blitz 2019 – Round 15.2 – Karjakin, Sergey – 1/2-1/2 – Nakamura, Hikaru – G72 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. a3 g6 5. g3 Bg7 6. Bg2 O-O 7. O-O a5 8. d3 d6 9. Rb1 h6 10. b4 axb4
FIDE WCh KO 2001 – Round 1.3 – Anand, Viswanathan – 1-0 – Touzane, Olivier – G133 1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. Nc3 e5 7. d3 Nc6 8. Rb1 a5 9. a3 h6 10. b4 axb4
FIDE-Wch k.o. 1997 – Round 1.3 – Chernin, Alexander – 1-0 – Istratescu, Andrei – G39 1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Nc3 O-O 5. Bg2 d6 6. O-O Nc6 7. d3 h6 8. a3 e5 9. Rb1 a5 10. Nd2 Ne7
Lindores Abbey Tal Memorial 2021 – Round 7.25 – Zvjaginsev, Vadim – 1-0 – Sasikiran, Krishnan – G314 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. a3 g6 5. g3 Bg7 6. Bg2 O-O 7. O-O a5 8. Rb1 d6 9. d3 h6 10. b4 axb4
Superbet Rapid 2022 – Round 4.1 – Korobov, Anton – 1/2-1/2 – Caruana, Fabiano – G16 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. a3 g6 5. g3 Bg7 6. Bg2 O-O 7. O-O d6 8. d3 a5 9. Rb1 h6 10. b4 axb4
World Blitz 2017 – Round 14.31 – Grigoriants, Sergey – 1-0 – Georgiev, Kiril – G734 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. a3 g6 5. d3 Bg7 6. g3 O-O 7. Bg2 a5 8. O-O d6 9. Rb1 h6 10. b4 axb4
World Blitz 2018 – Round 15.29 – Oparin, Grigoriy – 1/2-1/2 – Kovalev, Vladislavadislav – G889 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. c4 O-O 5. Nc3 d6 6. O-O e5 7. d3 Nc6 8. Rb1 a5 9. a3 h6 10. b4 axb4
World Blitz 2019 – Round 19.61 – Alekseev, Evgeny – 1-0 – Kovalev, Vladislav – G1307 1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 O-O 5. Nf3 d6 6. O-O e5 7. d3 Nc6 8. Rb1 a5 9. a3 h6 10. b4 axb4

A26u — Closed

1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.Nf3 Nf6 7.O-O O-O 8.Rb1 a5 9.a3 h6

Eval: [+0.24]

Les coups candidats

10.b4 — 91.0% (1883 parties)

Ambassadeurs : Kovacs, Arthur Dr. (7x), Foisor, Cristina-Adela (7x), Van Hoolandt, Patrick (7x), Piket, Jeroen (7x), De Coverly, Roger D (6x), Heinl, Achim (6x), Istratescu, Andrei (6x), Foisor, Ovidiu-Doru (6x)

10.Bd2 — 3.1% (64 parties)

Ambassadeurs : Papp, Nandor (2x), Glushenko, Nikolay (2x), Schumacher, Helmut (1x), Wostyn, Hendrik (1x), Miranda, Vladimiro (1x), Guddahl, Viggo (1x), Van der Laan, Dinard (1x), Comp Phantom (1x)

10.Nd2 — 1.7% (35 parties)

Ambassadeurs : Bauert, Ralph (3x), Panno, Oscar (1x), Tempone, Marcelo (1x), Shvidler, Eliahu (1x), Gallagher, Joseph G. (1x), Schwarzmeier, Klaus (1x), Heinsohn, Guenther (1x), Radjabov, Teimour (1x)

10.Ne1 — 1.3% (27 parties)

Ambassadeurs : Drimer, Dolfi (1x), Andersson, Ulf (1x), Lombardy, William J (1x), Alonso-Lej De Las Casas, Fernando (1x), Pupols, Viktors (1x), Remlinger, Larry (1x), Karlsson, Lars 1937 (1x), Hoi, Carsten (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	10.b4	10.Bd2	10.Nd2	10.Ne1
<1800	27	85%	7%	—	4%
1800-2200	659	87%	5%	1%	1%
2200-2600	1129	94%	1%	2%	1%
2600+	27	96%	—	4%	—

Évolution par décennie (% des parties)

Décennie	N parties	10.b4	10.Bd2	10.Nd2	10.Ne1
1950s	7	86%	—	—	14%
1960s	11	82%	9%	—	9%
1970s	68	96%	1%	—	3%
1980s	101	90%	4%	2%	3%
1990s	525	92%	3%	3%	1%
2000s	582	91%	3%	2%	1%
2010s	668	90%	4%	1%	1%
2020s	108	91%	2%	4%	2%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
10.b4	90%	91%	▲ +0.9%
10.Bd2	4%	2%	▼ -1.7%
10.Nd2	1%	4%	▲ +3.0%
10.Ne1	1%	2%	+0.4%

Joueurs célèbres

Champions du monde dans cette position

Smyslov, Vladimir — 2 parties
Anand, Viswanathan — 1 partie
Ding, Liren — 1 partie
Ju, Wenjun — 1 partie

Parties historiques

10.b4 — 91.0% (1883 parties)

1955 — Pilnik, Herman vs Najdorf, Miguel — 1/2-1/2 — Goteborg SWE
1955 — Palermo, Vicente vs Idigoras, Gregorio — 0-1 — Buenos Aires ARG
1955 — Behrensen, Jorge vs Najdorf, Miguel — 1/2-1/2 — Buenos Aires ARG
1956 — Pachman, Ludek vs Najdorf, Miguel — 1/2-1/2 — Moscow RUS
1957 — Behrensen, Joern vs Wexler, Bernardo — 1/2-1/2 — Mar del Plata ARG

10.Bd2 — 3.1% (64 parties)

1968 — Schumacher, Helmut vs Wostyn, Hendrik — 1-0 — Brussels BEL
1973 — Miranda, Vladimiro vs Guddahl, Viggo — 0-1 — Groningen NED
1984 — Riza, K. vs Vijayeendra Y G — 1-0 — Thessaloniki GRE
1988 — Eberhard, Jean-marie vs Videki, Sandor — 0-1 — St Ingbert
1989 — Van der Laan, Dinard vs Comp Phantom — 1-0 — The Hague NED

10.Nd2 — 1.7% (35 parties)

1980 — Panno, Oscar vs Tempone, Marcelo — 1-0 — Los Polvorines
1989 — Shvidler, Eliahu vs Gallagher, Joseph G. — 1/2-1/2 — Klee mem Zurich SUI
1991 — Laqua, Christian vs Osterkorn, Christoph — 0-1 — Regionalliga NordN
1992 — Schwarzmeier, Klaus vs Heinsohn, Guenther — 0-1 — BL2-O9192 GER
1992 — Poggio, Pierre vs Gomez, Gerard — 1-0 — France

10.Ne1 — 1.3% (27 parties)

1958 — Lombardy, William J vs Alonso-Lej De Las Casas, Fernando — 1-0 — Mar del Plata ARG
1969 — Drimer, Dolfi vs Andersson, Ulf — 1/2-1/2 — Lidkoping SWE
1976 — Darga, Klaus vs Garcia, Jo — 1/2-1/2 — Lanzarote
1977 — Pupols, Viktors vs Remlinger, Larry — 1/2-1/2 — San Francisco, CA USA
1984 — Denker, Arnold S vs Zapata, Alonso — 0-1 — New York op New York, NY USA

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