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

Avantages : case forte e4, case forte b5, case forte d5, paire de fous.
Faiblesses adverses : arriéré f7, Bg7 enfermé, Bc8 enfermé.
Problèmes : Bc1 enfermé, Bg2 enfermé, arriéré b2.
Plans :
● Bg5 — Clouer Nf6
● h3 — Empêcher ...Bg4

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Avantages : case forte d4, case forte g4, case forte e5, case forte f5, avant-poste d4(C), paire de fous.
Faiblesses adverses : arriéré b2, Bc1 enfermé, Bg2 enfermé.
Problèmes : Bg7 enfermé, Bc8 enfermé, arriéré f7.
Plans :
● ...Bg4 — Développer Bc8, clouer Nf3
● ...d5 — Rupture
● ...e4 — Rupture

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

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

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	● b2	● f7
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), ● e5 (2v1), ● 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

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