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 mobile

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plans. axb5 (Capture en b5, Expansion aile dame — 53 % des parties) ; Rd1 (30 % des parties) ; Nbd2 (Développer b1 — 11 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plans. ...Qb6 (Contrôle diagonale b6-g1, Prépare O-O-O — 15 % des parties) ; ...Qb8 (Prépare O-O-O — 12 % des parties) ; ...c4 (Frapper le centre adverse — 6 % des parties) ; ...Be7 (Développer f8 — 5 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→e3, e3→d4	● a6→b5, f7→e6
Passés	—	—
Majorité	—	● 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	mobile
Ruptures	● d4-d5	● …e6-e5

Partie
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

D29e — QGA: Classical (1933)

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

Les coups candidats

10.axb5 — 52.9% (171 parties)

Ambassadeurs : Uhlmann, Wolfgang (7x), Golz, Werner (5x), Jussupow, Artur (3x), Huebner, Robert (3x), Schrancz, Istvan (3x), Raetsky, Alexander (3x), Krallmann, Matthias (3x), Fuchs, Reinhart (2x)

10.Rd1 — 30.0% (97 parties) →

Ambassadeurs : Vaulin, Alexander P. (2x), Ac, Michal (2x), Bialas, Wolfram (2x), Bachmann, Karlheinz (2x), Jaracz, Pawel (2x), Saigin, Vladimir (1x), Ivanov, Vladimir (1x), Hottes, Dieter (1x)

10.Nbd2 — 11.1% (36 parties)

Ambassadeurs : Hempson, Peter W (2x), Michiels, Bart (2x), Uneklint, U. (1x), Samuelsson Stefan (1x), Hodakowsky, Georg (1x), Rickers, Gerd (1x), Clarke, Peter (1x), Afizov, Marsel (1x)

10.e4 — 1.9% (6 parties)

Ambassadeurs : Mello, Jose Benicio (1x), Rocha, Antonio (1x), Kotov, Alexander (1x), Flohr, Salo (1x), Petrosian, Tigran V. (1x), Smyslov, Vasily (1x), Piket, Jeroen (1x), Seirawan, Yasser (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	4	50%	25%	25%	—
1800-2200	58	36%	38%	21%	2%
2200-2600	188	51%	33%	11%	1%
2600+	12	83%	17%	—	—

Évolution par décennie (% des parties)

Décennie	N parties	10.axb5	10.Rd1	10.Nbd2	10.e4
1950s	18	56%	28%	—	11%
1960s	29	52%	28%	14%	3%
1970s	5	100%	—	—	—
1980s	18	67%	28%	6%	—
1990s	104	72%	19%	3%	1%
2000s	80	49%	35%	10%	2%
2010s	55	20%	42%	33%	—
2020s	14	29%	57%	14%	—

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
10.axb5	20%	29%	▲ +8.6%
10.Rd1	42%	57%	▲ +15.3%
10.Nbd2	33%	14%	▼ -18.4%
10.e4	0%	0%	+0.0%

Joueurs célèbres

Champions du monde dans cette position

Anand, Viswanathan — 2 parties
Kramnik, Vladimir — 1 partie

Parties historiques

10.axb5 — 52.9% (171 parties)

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 olm
1953 — Miguel, Nahuel vs Rapaka Samuel Paul — 1/2-1/2 — Buenos Aires ARG
1957 — Uhlmann, Wolfgang vs Stahlberg, Gideon — 1-0 — Wageningen zt

10.Rd1 — 30.0% (97 parties)

1950 — Bondarevsky, Igor vs Alatortsev, Vladimir N. — 0-1 — Moscow RUS
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
1955 — Ilivitsky, Georgy A vs Petrosian, Tigran V. — 1/2-1/2 — Moskou ch-URS
1957 — Taimanov, Mark vs Stoliar, Efim Samoilovich — 1/2-1/2 — Leningrad RUS

10.Nbd2 — 11.1% (36 parties)

1962 — Afizov, Marsel 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 — 0-1 — Rhyl ch-BCF
1988 — Hernandez Onna, Roman vs Barua, Dibyendu — 1/2-1/2 — It Koyenko Calicut IND

10.e4 — 1.9% (6 parties)

1950 — Kotov, Alexander vs Flohr, Salo — 1-0 — Budapest HUN
1950 — Petrosian, Tigran V. vs Smyslov, Vasily — 1/2-1/2 — Moskou ch-URS
1964 — Mello, Jose Benicio vs Rocha, Antonio — 0-1 — Brasilia BRA
1994 — Piket, Jeroen vs Seirawan, Yasser — 0-1 — Monte Carlo MNC
2002 — Mayer, Johann vs Dopper, Johan C — 1/2-1/2 — ICCF Email

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