D45r — Semi-Slav: 6.Qc2 Bd6 7.b3 O-O 8.Be2

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Qc2 Bd6 7.b3 O-O 8.Be2 * ● Trait aux Noirs

Ouverture — Centre fermé

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plan principal. Jeu au centre (rupture c4-c5).

Atouts. Les Blancs s'appuient sur la paire de fous.

Côté adverse. Le fou enfermé en c8.

En contrepartie. Le roi n'est pas encore à l'abri et plusieurs pièces dorment encore (le fou c1 et les tours a1 et h1).

Plans. O-O (Mettre le roi en sécurité, connecter les tours) ; Bd2 (Développer Bc1) ; h3 (Empêcher ...Bg4).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plan principal. Exploiter la case forte e4.

Atouts. Les Noirs s'appuient sur un avant-poste en e4, un fou actif en d6 et la paire de fous.

Côté adverse. Le fou enfermé en c1 et le roi resté au centre.

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

Plans. ...c5 (Rupture) ; ...e5 (Rupture).

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● a2→b3, f2→e3, b3→c4, e3→d4	● c6→d5, e6→d5, b7→c6, f7→e6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	—	—
Cases faibles	● e4	● e5
Centre	● d4 (2v0)	● d5 (3v2)

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 3)
Be2	● Be2 Ok (mob. 3)
Bd6		● Bd6 Actif (mob. 10)
Bc8		● Bc8 Non développé (mob. 0)
Paire de fous	● Oui	● Oui
Non développées	3 (● c1, ● a1, ● h1)	2 (● c8, ● a8)

Sécurité du roi

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

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	fermé
Ruptures	● c4-c5, ● e3-e4	● …c6-c5, ● …e6-e5

Partie
1948 JUG Ch – Round 16 – Puc, Stojan – 0-1 – Vukovic, Sava – G67 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. e3 c6 5. Nc3 Nbd7 6. Be2 Bd6 7. Qc2 O-O 8. b3 e5 9. cxd5 cxd5 10. Bb2 e4
1948 Mar del Plata – Round 13 – Najdorf, Miguel – 1-0 – Denker, Arnold S – G106 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 dxc4 9. bxc4 e5 10. O-O Re8
1949 Opatija m – Round 11 – Najdorf, Miguel – 1/2-1/2 – Trifunovic, Petar – G10 1. Nf3 d5 2. c4 c6 3. d4 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 dxc4 9. bxc4 e5 10. O-O Re8
1950 Candidats Tournament – Round 1 – Najdorf, Miguel – 1/2-1/2 – Kotov Lundqvist, Alex – G1 1. d4 d5 2. c4 c6 3. Nc3 e6 4. Nf3 Nf6 5. e3 Nbd7 6. Qc2 Bd6 7. Be2 O-O 8. b3 Qe7 9. O-O dxc4 10. bxc4 e5
1951 Ljubljana ch YUG – Round 19 – Vidmar, Milan Jr – 1/2-1/2 – Puc, Stojan – G29 1. Nf3 Nf6 2. c4 e6 3. Nc3 d5 4. d4 c6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 Qe7 9. O-O Rd8 10. e4 e5
1951 Marianske Lazne zt – Round 1 – Fred, Aatos – 0-1 – Foltys, Jan – G42 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 Qe7 9. O-O Re8 10. Bb2 dxc4
1951 Wertheim Memorial – Round 5 – Najdorf, Miguel – 1-0 – Bisguier, Arthur B – G25 1. d4 d5 2. c4 c6 3. Nf3 e6 4. Nc3 Nf6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 dxc4 9. bxc4 e5 10. O-O Re8
1951 Wertheim Memorial – Round 6 – Najdorf, Miguel – 1/2-1/2 – Horowitz, Albert Israel – G35 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 c6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 dxc4 9. bxc4 e5 10. O-O Re8
1951 Wertheim Memorial – Round 9 – Reshevsky, Samuel – 0-1 – Euwe, Max – G49 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 e5 9. cxd5 Nxd5 10. Bb2 Bb4
1952 Buenos Aires – Round 7 – Luckis, Marcos – 1-0 – Bartis, Gustavo – G43 1. d4 d5 2. c4 c6 3. e3 Nf6 4. Nf3 e6 5. Nc3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 dxc4 9. bxc4 e5 10. O-O Re8
1952 Buenos Aires – Round 8 – Huguet, Horacio E – 1/2-1/2 – Incutto, Carlos – G48 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 Qc7 9. Bb2 a6 10. Rc1 dxc4
1952 Helsinki olm – Round 1 – Eliskases, Erich – 1-0 – Milner Barry, Philip – G144 1. d4 Nf6 2. Nf3 d5 3. c4 c6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 e5 9. cxd5 Nxd5 10. Nxd5 cxd5
1952 Helsinki olm – Round 1 – Fred, Aatos – 1-0 – Bisguier, Arthur B – G33 1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. e3 e6 5. Nc3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 dxc4 9. bxc4 e5 10. O-O Qe7
1952 Rosario – Round ? – Wexler, Bernardo – 1/2-1/2 – Calatayud Manuel – G12 1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 dxc4 9. bxc4 e5 10. O-O Re8
1954 Budapest HUN – Round 1 – Lengyel, Laszlo – 0-1 – Pogats, Jozsef Jr. – G1 1. c4 Nf6 2. Nf3 c6 3. d4 d5 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 dxc4 9. bxc4 e5 10. O-O Re8
1954 US Open 55th – Round 12 – Bisguier, Arthur B – 1/2-1/2 – Pomar Salamanca, Arturo – G18 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 e5 9. cxd5 cxd5 10. dxe5 Nxe5
1955 Budapest – Round 1 – Weinberger, Tibor – 1-0 – Barczay, Laszlo – G13 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 e6 5. Nc3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 Qe7 9. O-O dxc4 10. bxc4 e5
1955 Prague tm Prague CZE – Round 4 – Ujtelky, Maximilian – 1-0 – Tarnowski, Alfred – G25 1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 Qe7 9. O-O dxc4 10. bxc4 e5
1956 CSR Ch – Round 10 – Jezek, Jaroslav – 0-1 – Florian, Jaromir – G85 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 c6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 e5 9. dxe5 Nxe5 10. cxd5 Nxd5
1958 It Kienbaum GER – Round 8 – Neikirkh, Oleg – 0-1 – Honfi, Karoly – G11 1. c4 e6 2. Nc3 d5 3. d4 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 Qe7 9. O-O dxc4 10. bxc4 e5
1958 Munich olm fin-A – Round 7 – Minev, Nikolay N – 0-1 – Fichtl, Jiri – G37 1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 c6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 e5 9. dxe5 Nxe5 10. cxd5 Nxd5
1959 Corr – Round ? – Balogh, Janos – 1/2-1/2 – Lundqvist, Ake – G9 1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 e5 9. cxd5 Nxd5 10. Bb2 Bb4
1961 Zagreb – Round 18 – Djantar, Djordje – 1/2-1/2 – Ciric, Dragoljub M – G139 1. c4 e6 2. d4 d5 3. Nc3 c6 4. e3 Nf6 5. Nf3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 Qe7 9. O-O e5 10. Bb2 e4
1962 Asztalos Memorial 5th – Round 15 – Portisch, Lajos – 1-0 – Szily, Jozsef – G110 1. d4 e6 2. c4 d5 3. Nc3 c6 4. e3 Nf6 5. Nf3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 Qe7 9. O-O a6 10. Bb2 dxc4
1962 DDR-12ch – Round 6 – Golz, Werner – 1-0 – Zinn, Lothar – G14 1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 e5 9. cxd5 cxd5 10. Nb5 Bb4+
1963 Asztalos Memorial 6th – Round 4 – Lengyel, Laszlo – 0-1 – Fuchs, Reinhart – G11 1. c4 Nf6 2. Nf3 c6 3. d4 d5 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 e5 9. cxd5 Nxd5 10. Bb2 Nxc3
1963 Bad Liebenstein – Round 13 – Fuchs, Reinhart – 1/2-1/2 – Szily, Jozsef – G88 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 Nf6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 a6 9. O-O Qe7 10. Bb2 dxc4
1963 Enschede zt – Round 1 – Tatai, Stefano – 1/2-1/2 – Pomar Salamanca, Arturo – G7 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 e5 9. cxd5 cxd5 10. dxe5 Nxe5
1965 Pardubice – Round 13 – Alster, Ladislav – 1-0 – Fichtl, Jiri – G82 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e3 Nf6 5. Nf3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 e5 9. O-O dxc4 10. bxc4 Qe7
1966 Helsinki – Round 8 – Kanko, Ilkka – 0-1 – Schmid, Lothar – G33 1. d4 e6 2. c4 d5 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 dxc4 9. bxc4 e5 10. O-O Re8
1966 Palma de Mallorca – Round 11 – Pomar Salamanca, Arturo – 1-0 – Robatsch, Karl – G64 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 Nf6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 dxc4 9. bxc4 e5 10. O-O exd4
1969 Schwerin – Round 12 – Baumbach, Friedrich, Dr. – 1-0 – Dietze, Wolfgang, Dr. – G88 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 e5 9. cxd5 cxd5 10. Nb5 Bb8
40. Olympiad Open 2012 – Round 5.16 – Beliavsky, Alexander G – 1-0 – Perunovic, Milos – G316 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 e5 9. cxd5 cxd5 10. Nb5 Bb4+
Amber-rapid 16th 2007 – Round 5 – Vallejo Pons, Francisco – 1-0 – Gelfand, Boris – G12 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 dxc4 9. bxc4 e5 10. O-O Re8
Amber-rapid 18th 2009 – Round 10 – Karjakin, Sergey – 1/2-1/2 – Leko, Peter – G35 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 e5 9. cxd5 cxd5 10. Nb5 Bb4+
Amber-rapid 18th 2009 – Round 4 – Wang, Yue(SH) – 0-1 – Kramnik, Vladimir – G12 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e3 Nf6 5. Nf3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 e5 9. cxd5 cxd5 10. Nb5 Bb4+
Candidats Tournament 1985 – Round 6 – Portisch, Lajos – 0-1 – Ribli, Zoltan – G37 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 e5 9. cxd5 Nxd5 10. Nxd5 cxd5
OHRA-A 1986 – Round 1 – Portisch, Lajos – 1/2-1/2 – Huebner, Robert – G2 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 e5 9. cxd5 Nxd5 10. Nxd5 cxd5
Qatar Masters Open 2015 – Round 2.30 – Fedoseev, Vladimir – 1/2-1/2 – Ali Marandi, Cemil Can – G70 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 e5 9. cxd5 cxd5 10. Nb5 Bb4+
Tal Memorial 2006 – Round 5 – Gelfand, Boris – 1/2-1/2 – Morozevich, Alexander – G18 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 e5 9. cxd5 cxd5 10. Nb5 Bb4+
TCh-RUS 2008 – Round 6 – Evdokimov, Alexander A. – 1/2-1/2 – Sakaev, Konstantin – G152 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 e5 9. cxd5 cxd5 10. dxe5 Nxe5
World Blitz 2007 – Round 13 – Gelfand, Boris – 1-0 – Shirov, Alexei – G129 1. Nf3 Nf6 2. c4 e6 3. Nc3 d5 4. d4 c6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 e5 9. cxd5 Nxd5 10. Nxd5 cxd5
World Blitz 2016 – Round 5.24 – Bindrich, Falko – 0-1 – Lu, Shanglei – G194 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e3 Nf6 5. Nf3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 dxc4 9. bxc4 e5 10. O-O Re8
World Blitz 2022 – Round 10.30 – Saini Vidit – 1-0 – Nikolov, Nikolay Petrov – G525 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Nbd7 5. Qc2 c6 6. e3 Bd6 7. Be2 O-O 8. b3 e5 9. cxd5 e4 10. Nxe4 Nxe4
World Blitz Final 2012 – Round 18 – Ivanchuk, Vasyl – 1/2-1/2 – Jumabayev, Rinat – G134 1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 c6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 e5 9. cxd5 cxd5 10. Nb5 Bb4+
World Rapid Final 2012 – Round 6 – Ivanchuk, Vasyl – 1/2-1/2 – Topalov, Veselin – G46 1. Nf3 d5 2. d4 Nf6 3. c4 c6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 e5 9. cxd5 cxd5 10. Nb5 Bb4+

D45r —

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Qc2 Bd6 7.b3 O-O 8.Be2

Les coups candidats

8…b6 — 49.4% (2305 parties) →

Ambassadeurs : Akesson, Ralf (15x), Drasko, Milan (12x), Gelfand, Boris (11x), Faizrakhmanov, Ramil (11x), Andraschko, Felix (10x), Bjuhr, Arne (10x), Pavasovic, Dusko (9x), Korneev, Oleg (9x)

8…e5 — 14.6% (684 parties)

Ambassadeurs : Drasko, Milan (7x), Stripunsky, Alexander (6x), Pomar Salamanca, Arturo (4x), Bagirov, Vladimir (4x), Rustemov, Alexander (4x), Portisch, Lajos (4x), Nikolov, Nikolay Petrov (4x), Lukacs, Peter (3x)

8…Re8 — 12.7% (591 parties) →

Ambassadeurs : Kuczynski, Robert (5x), Shapiro, Daniel (5x), Uhlmann, Wolfgang (5x), Portisch, Lajos (5x), Hoang, Thanh Trang (5x), Li, Wenliang (4x), Zoler, Dan (4x), Bekker-Jensen, David (3x)

8…dxc4 — 9.9% (463 parties)

Ambassadeurs : Drasko, Milan (5x), Blagojevic, Dragisa (5x), Korneev, Oleg (5x), Najdorf, Miguel (4x), Hoang, Thanh Trang (4x), Mednis, Edmar J (3x), Nogueiras Santiago, Jesus (3x), Nienhuis, Kier H (3x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	8…b6	8…e5	8…Re8	8…dxc4
<1800	41	49%	12%	12%	7%
1800-2200	1000	49%	14%	16%	9%
2200-2600	3080	50%	14%	12%	9%
2600+	208	74%	14%	3%	4%

Évolution par décennie (% des parties)

Décennie	N parties	8…b6	8…e5	8…Re8	8…dxc4
1940s	4	25%	25%	—	50%
1950s	40	12%	20%	10%	28%
1960s	31	19%	35%	26%	6%
1970s	29	21%	31%	17%	28%
1980s	110	4%	26%	21%	39%
1990s	638	15%	20%	26%	19%
2000s	1318	38%	14%	17%	13%
2010s	1731	64%	13%	7%	5%
2020s	768	76%	11%	5%	2%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
8…b6	64%	76%	▲ +11.8%
8…e5	13%	11%	▼ -2.4%
8…Re8	7%	5%	▼ -2.4%
8…dxc4	5%	2%	▼ -3.1%

Joueurs célèbres

Champions du monde dans cette position

Kramnik, Vladimir — 7 parties
Anand, Viswanathan — 6 parties
Karpov, Anatoly — 4 parties
Carlsen, Magnus — 4 parties
Ding, Liren — 4 parties
Kasparov, Garry — 3 parties
Karpov, Aleksandr — 3 parties
Tal, Mikhail — 2 parties
Gukesh D — 2 parties
Botvinnik, Mikhail — 1 partie
Euwe, Max — 1 partie

Parties historiques

8…b6 — 49.4% (2305 parties)

1949 — Najdorf, Miguel vs Alonso-Lej De Las Casas, Fernando — 1-0 — Buenos Aires ch ARG
1951 — Kluger, Gyula vs Negyesy, Gyorgy — 1/2-1/2 — Hungary ch
1952 — Najdorf, Miguel vs Cobo Arteaga, Eldis — 1-0 — Havana CUB
1953 — Livshin, Iosif vs Klavins, Janis — 0-1 — Leningrad RUS
1957 — Tsvetkov, Alexandar K vs Valchanov, Mihail — 1-0 — Sofia BUL

8…e5 — 14.6% (684 parties)

1948 — Puc, Stojan vs Vukovic, Sava — 0-1 — Belgrade SRB
1951 — Reshevsky, Samuel vs Euwe, Max — 0-1 — New York, NY USA
1951 — Schroeder, Ruperto vs Ader Hausman, Walter — 0-1 — Santiago de Chile
1952 — Eliskases, Erich vs Milner Barry, Philip — 1-0 — Helsinki olm
1954 — Bisguier, Arthur B vs Pomar Salamanca, Arturo — 1/2-1/2 — New Orleans, LA USA

8…Re8 — 12.7% (591 parties)

1951 — Bolbochan, J. vs Schroeder, Raik — 1-0 — Mar del Plata ARG
1952 — Wexler, Bernardo vs Chapo, Carlos — 1-0 — Rosario ARG
1952 — Eliskases, Erich vs Aguilar Aleman, Diego Ignacio — 1-0 — Havana CUB
1958 — Minev, Nikolay N vs Pantaleev, Dimitar — 1/2-1/2 — Sofia BUL
1963 — Neikirkh, Oleg vs Pantaleev, Dimitar Dimitrov — 0-1 — Sofia BUL

8…dxc4 — 9.9% (463 parties)

1948 — Najdorf, Miguel vs Denker, Arnold S — 1-0 — Mar del Plata ARG
1949 — Najdorf, Miguel vs Trifunovic, Petar — 1/2-1/2 — Opatija
1951 — Najdorf, Miguel vs Bisguier, Arthur B — 1-0 — New York, NY USA
1951 — Shocron, Alon vs Najdorf, Rafael — 0-1 — Buenos Aires ch-ARG
1951 — Najdorf, Miguel vs Horowitz, Albert Israel — 1/2-1/2 — New York, NY USA

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