D29e — QGA: Classical, 8…Bb7 9.a4 Nbd7

1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2 b5 8.Bb3 Bb7 9.a4 Nbd7 * ○ Trait aux Blancs

Ouverture — Centre semi-ouvert

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Avantages : majorité centre (2v1), case forte e5, Bb3 actif, paire de fous, colonne c.
Faiblesses adverses : Bf8 enfermé, roi noir au centre.
Problèmes : Bc1 enfermé, arriéré b2, 3 pièces non développées (B1, C1, A1).
Plans :
● Nc3 — Développer Nb1
● Bd2 — Développer Bc1
● h3 — Empêcher ...Bg4
● Rc — Tour sur colonne c

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Avantages : majorité aile_dame (3v2), case forte e4, case forte d5, avant-poste d5(C), Bb7 actif, paire de fous, colonne d.
Faiblesses adverses : arriéré b2, Bc1 enfermé.
Problèmes : roi au centre, Bf8 enfermé, 3 pièces non développées (F8, A8, H8).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● ...Be7 — Développer Bf8
● ...Bg4 — Clouer Nf3
● ...c4 — Rupture
● ...e5 — Rupture

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

D29e — Classical

1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2 b5 8.Bb3 Bb7 9.a4 Nbd7

Eval: [-0.08]

Les coups candidats

10.axb5 — 52.3% (171 parties)

Ambassadeurs : Uhlmann, Wolfgang (7x), Golz, Werner (5x), Szymczak, Zbigniew (5x), Jussupow, Artur (4x), Sasikiran, Krishnan (4x), Krallmann, Matthias (4x), Kiriakov, Petr (3x), Meister, Jakob (3x)

10.Rd1 — 29.4% (96 parties) →

Ambassadeurs : Vaulin, Alexander P. (2x), Ac, Michal (2x), Bialas, Wolfram (2x), Bachmann, Karlheinz (2x), Jaracz, Pawel (2x), Fine, Reuben (1x), Pilnik, Herman (1x), Euwe, Max (1x)

10.Nbd2 — 11.0% (36 parties)

Ambassadeurs : Hempson, Peter W (3x), Evans, Larry (1x), Rehberg, C (1x), Uneklint U (1x), Samuelsson Stefan (1x), Hodakowsky, Georg (1x), Rickers, Gerd (1x), Clarke, Peter H (1x)

10.e4 — 3.4% (11 parties)

Ambassadeurs : Guimard, Carlos E (2x), Najdorf, Miguel (2x), Flohr, Salo (2x), Stahlberg, Gideon (1x), Sanguinetti, Renato (1x), Pilnik Aranda, Karla Constanza (1x), Pilnik, Herman (1x), Kotov, Alexander (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	10.axb5	10.Rd1	10.Nbd2	10.e4
1800-2200	45	36%	36%	24%	—
2200-2600	190	50%	35%	10%	1%
2600+	12	83%	17%	—	—

Évolution par décennie (% des parties)

Décennie	N parties	10.axb5	10.Rd1	10.Nbd2	10.e4
1930s	1	—	100%	—	—
1940s	8	25%	12%	12%	50%
1950s	19	53%	26%	—	16%
1960s	28	50%	25%	18%	4%
1970s	5	100%	—	—	—
1980s	18	67%	28%	6%	—
1990s	104	72%	19%	3%	1%
2000s	79	49%	35%	9%	3%
2010s	54	20%	41%	33%	—
2020s	11	27%	64%	9%	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
10.axb5	20%	27%	▲ +6.9%
10.Rd1	41%	64%	▲ +22.9%
10.Nbd2	33%	9%	▼ -24.2%
10.e4	0%	0%	+0.0%

Joueurs célèbres

Champions du monde dans cette position

Anand, Viswanathan — 2 parties
Euwe, Max — 1 partie
Alekhine, Alexander — 1 partie
Smyslov, Vladimir — 1 partie
Kramnik, Vladimir — 1 partie

Parties historiques

10.axb5 — 52.3% (171 parties)

1946 — Lundin, Erik vs Ekstrom, Folke — 1/2-1/2 — Stockholm SWE
1947 — Maderna, Carlos vs Stahlberg, Gideon — 0-1 — Mar del Plata ARG
1951 — Kopilov, Nikolay Georgiyevich vs Flohr, Salo — 1/2-1/2 — Moscow RUS
1951 — Suetin, Alexey S vs Alatortsev, Vladimir N. — 1-0 — Leningrad RUS
1952 — Florian, Tibor vs Pilnik, Herman — 1/2-1/2 — Helsinki FIN

10.Rd1 — 29.4% (96 parties)

1937 — Euwe, Max vs Alekhine, Alexander — 1-0 — Bad Nauheim
1945 — Fine, Reuben vs Pilnik, Herman — 1-0 — Washington, DC USA
1950 — Bondarevsky, Igor vs Alatortsev, Vladimir N. — 0-1 — Moskou ch-URS
1951 — Kapu, Jeno vs Borloy, Karoly — 1/2-1/2 — Hungary ch
1952 — Gruenfeld, Ernst vs O'Kelly, Albéric de Galway — 1/2-1/2 — Belgrade SRB

10.Nbd2 — 11.0% (36 parties)

1948 — Evans, Larry vs Rehberg, C — 1-0 — New York Marshall
1962 — Marsalek, Josef vs Fichtl, Jiri — 1/2-1/2 — Jablonec
1966 — Hodakowsky, Georg vs Rickers, Gerd — 1-0 — Heilbronn
1969 — Uneklint U vs Samuelsson Stefan — 0-1 — corr Sweden
1969 — Hempson, Peter W vs Clarke, Peter H — 0-1 — Rhyl WLS

10.e4 — 3.4% (11 parties)

1941 — Stahlberg, Gideon vs Najdorf, Miguel — 1-0 — Buenos Aires ARG
1941 — Guimard, Carlos E vs Pilnik, Herman — 1-0 — Buenos Aires ARG
1944 — Sanguinetti, Renato vs Pilnik Aranda, Karla Constanza — 1/2-1/2 — Buenos Aires ch-ARG
1946 — Guimard, Carlos E vs Najdorf, Miguel — 0-1 — Prague CZE
1950 — Kotov, Alexander vs Flohr, Salo — 1-0 — Tournament Budapest (HUN)

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	● b2	—
Chaînes	● f2→e3, e3→d4	● a6→b5, f7→e6
Passés	—	—
Majorité	● centre 2v1	● aile_dame 3v2

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● e5 (2v1)	● e4 (2v0), ● d5 (3v1)
Cases faibles	—	—
Centre	● d4 (2v1), ● e5 (2v1)	● d5 (3v1), ● e4 (2v0)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Semi-ouvertes	● c	● d

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 1)
Bb3	● Bb3 Actif (mob. 6)
Bb7		● Bb7 Actif (mob. 5)
Bf8		● Bf8 Non développé (mob. 2)
Paire de fous	● Oui	● Oui
Non développées	3 (b1, c1, a1)	3 (f8, a8, h8)

Sécurité du roi

	♔ Blancs	♚ Noirs
Statut	● Roqué	● Au centre !
Droits de roque	—	O-O / O-O-O

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	semi-ouvert
Ruptures	● d4-d5, ● e3-e4	● …c5-c4, ● …e6-e5

Partie
1933 Ebensee – Round 1 – Eliskases, Erich – 0-1 – Spielmann, Rudolf – G2 1. d4 d5 2. c4 e6 3. Nf3 Nd7 4. e3 Ngf6 5. Bd3 dxc4 6. Bxc4 a6 7. O-O b5 8. Bb3 Bb7 9. Qe2 c5 10. a4 Qb6
1941 Buenos Aires Circulo – Round 2 – Stahlberg, Gideon – 1-0 – Najdorf, Miguel – G4 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. e4 cxd4
1941 Buenos Aires Circulo – Round 6 – Guimard, Carlos E – 1-0 – Pilnik, Herman – G20 1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. e4 cxd4
1946 Treybal Memorial – Round 2 – Guimard, Carlos E – 0-1 – Najdorf, Miguel – G9 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. e4 cxd4
1947 Mar del Plata – Round 11 – Maderna, Carlos – 0-1 – Stahlberg, Gideon – G93 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. axb5 axb5
1950 Candidats Tournament – Round 9 – Kotov Lundqvist, Alex – 1-0 – Flohr, Salo – G36 1. d4 d5 2. c4 dxc4 3. Nf3 a6 4. e3 Nf6 5. Bxc4 e6 6. O-O c5 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. e4 cxd4
1950 Moskou ch-URS – Round 1 – Petrosian, Tigran A. – 1/2-1/2 – Smyslov, Vladimir – G22 1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 4. e3 c5 5. Bxc4 e6 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. e4 cxd4
1951 San Rafael – Round ? – Eliskases, Erich – 1-0 – Acebal Muniz, Antonio – G17 1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. Bc2 Be7
1951 URS Ch sf – Round 5 – Suetin, Alexey S – 1-0 – Alatortsev, Vladimir N. – G7 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. axb5 axb5
1951 URS-ch19 – Round ? – Kopilov, Nikolay Georgiyevich – 1/2-1/2 – Flohr, Salo – G2 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. axb5 axb5
1952 Helsinki olm – Round 1 – Florian, Tibor – 1/2-1/2 – Pilnik, Herman – G26 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 a6 6. O-O c5 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. axb5 axb5
1953 Buenos Aires m – Round 12 – Najdorf, Miguel – 1/2-1/2 – Reshevsky, Samuel – G7 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. axb5 axb5
1957 Wageningen zt – Round 8 – Uhlmann, Wolfgang – 1-0 – Stahlberg, Gideon – G37 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 a6 6. O-O c5 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. axb5 axb5
1958 GDR Ch Schkopau GER – Round 9 – Uhlmann, Wolfgang – 1/2-1/2 – Golz, Werner – G52 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. axb5 axb5
1959 Dresden – Round 1 – Uhlmann, Wolfgang – 1-0 – Fichtl, Jiri – G1 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 a6 6. O-O c5 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. axb5 axb5
1959 GDR Ch Leipzig GER – Round 7 – Golz, Werner – 1/2-1/2 – Pietzsch, Wolfgang – G32 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. axb5 axb5
1959 New York ch-USA – Round 2 – Weinstein, Raymond – 0-1 – Sherwin, James T – G7 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. axb5 axb5
1960 Buenos Aires – Round 5 – Uhlmann, Wolfgang – 0-1 – Benko, Pal – G60 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. axb5 axb5
1960 It Bad Salzungen GER – Round 10 – Golz, Werner – 1/2-1/2 – Fuchs, Reinhart – G42 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. axb5 axb5
1960 Leipzig olm prel – Round 3 – Golz, Werner – 1-0 – Fred, Aatos – G81 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. axb5 axb5
1960 Varna Varna BUL – Round 11 – Minev, Nikolay N – 1/2-1/2 – Fuchs, Reinhart – G41 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. axb5 axb5
1961 WchT U26 08th – Round 3.3 – Liptay, Laszlo Dr. – 1-0 – Lund, Per – G24 1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. Bc2 Bd6
1962 CSR Ch – Round 10 – Marsalek, Josef – 1/2-1/2 – Fichtl, Jiri – G82 1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 4. e3 e6 5. Bxc4 a6 6. O-O c5 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. Nbd2 Qb6
1963 Bad Liebenstein – Round 15 – Uhlmann, Wolfgang – 1-0 – Balcerowski, Witold – G99 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. axb5 axb5
1963 Clare Benedict Cup 10th – Round 5 – Darga, Klaus – 1-0 – Clarke, Peter H – G1 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. axb5 axb5
1964 BRA Ch – Round 15 – Mello, Jose Benicio – 0-1 – Rocha, Antonio – G52 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. e4 Be7
1964 Rubinstein Memorial – Round 3 – Balcerowski, Witold – 1/2-1/2 – Novopashin, Arkady – G13 1. d4 d5 2. c4 dxc4 3. e3 Nf6 4. Bxc4 e6 5. Nf3 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. axb5 axb5
1965 Hastings6566 – Round 9 – Uhlmann, Wolfgang – 1-0 – Gheorghiu, Florin – G39 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. axb5 axb5
1965 Leipzig Inter-1 – Round 10 – Uhlmann, Wolfgang – 1/2-1/2 – Golz, Werner – G37 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. axb5 axb5
1968 Hungary – Round 1 – Farago, Ivan – 1-0 – Szekely, Mihaly – G32 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. axb5 axb5
1969 Corr ch HUN sf – Round ? – Grnwald, M – 0-1 – Schrancz, Istvan – G1 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. axb5 axb5
1969 Rhyl ch-BCF – Round 11 – Hempson, Peter W – 0-1 – Clarke, Paul R H – G81 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. Nbd2 Qb6
1969 WchT U26 fin-B 16th – Round 3.4 – Farago, Ivan – 1-0 – Acosta, Mariano – G19 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. axb5 axb5
Amber-blind 3rd 1994 – Round 6 – Piket, Jeroen – 0-1 – Seirawan, Yasser – G24 1. d4 d5 2. Nf3 c5 3. c4 dxc4 4. e3 e6 5. Bxc4 Nf6 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. e4 cxd4
Horgen CS 1994 – Round 7 – Jussupow, Artur – 1/2-1/2 – Lautier, Joel – G27 1. d4 d5 2. c4 dxc4 3. e3 Nf6 4. Bxc4 e6 5. Nf3 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. axb5 axb5
Interpolis 1986 – Round 4 – Miles, Anthony J – 1/2-1/2 – Huebner, Robert – G10 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. axb5 axb5
Mainz CC Champions Duel 2001 – Round 5 – Kramnik, Vladimir – 0-1 – Anand, Viswanathan – G5 1. d4 d5 2. c4 dxc4 3. Nf3 e6 4. e3 Nf6 5. Bxc4 c5 6. O-O a6 7. Bb3 Nbd7 8. Qe2 b5 9. a4 Bb7 10. axb5 axb5
Melody Amber, Blindfold, Monaco 1995 – Round 2 – Piket, Jeroen – 1-0 – Lautier, Joel – G6 1. d4 d5 2. c4 dxc4 3. e3 Nf6 4. Bxc4 e6 5. Nf3 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. a4 Nbd7 10. axb5 axb5

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