B45t — Sicilian: Taimanov, Four Knights, 6.Ndb5 Bb4 7.a3, 9.ed5 ed5

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Nf6 6.Ndb5 Bb4 7.a3 Bxc3+ 8.Nxc3 d5 9.exd5 exd5 * ○ Trait aux Blancs

Ouverture — Centre asymétrique

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Avantages : majorité aile_dame (3v2), case forte b5, paire de fous, colonne d.
Faiblesses adverses : isolé d5, Bc8 enfermé, roi noir au centre.
Problèmes : roi au centre, Bc1 enfermé, Bf1 enfermé, 4 pièces non développées (C1, F1, A1, H1).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● Bg5 — Clouer Nf6
● Bd3 — Développer Bf1
● Re — Tour sur colonne e
● Rd — Tour sur colonne d

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Avantages : majorité centre (1v0), case forte e4, case forte g4, colonne c.
Faiblesses adverses : Bc1 enfermé, Bf1 enfermé, roi blanc au centre.
Problèmes : roi au centre, Bc8 enfermé, isolé d5, 3 pièces non développées (C8, A8, H8).
Plans :
● O-O — Mettre le roi en sécurité, connecter les tours
● ...Bf5 — Développer Bc8
● ...d4 — Rupture
● ...Re — Tour sur colonne e
● ...Rc — Tour sur colonne c

Avantages

Faiblesses adverses

Diagonale active

Plans

Structure de pions

B45t — Taimanov Four Knights

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Nf6 6.Ndb5 Bb4 7.a3 Bxc3+ 8.Nxc3 d5 9.exd5 exd5

Eval: [+0.26]

Les coups candidats

10.Bd3 — 90.2% (4174 parties)

Ambassadeurs : Van Riemsdijk, Herman C. (31x), Khenkin, Igor (18x), Stein, Bernd (15x), Rogozenco, Dorian (15x), Goncharenko, Georgy (13x), Grobler, David (13x), Witkowski, Stefan (12x), Rosen, Bernd (12x)

10.Bg5 — 6.0% (278 parties)

Ambassadeurs : Kuljasevic, Davorin (3x), Theissl Pokorna, Regina (3x), Blackburne, Joseph (2x), Stenborg, Ake (2x), Aguirre Rivera, Daniel Arturo (2x), Rosen, Bernd (2x), Caminade, Christian (2x), Kohut, Anna (2x)

10.Qe2+ — 1.3% (59 parties)

Ambassadeurs : Dvoirys, Semen I. (3x), Losada Carrera, Francisco Javier (2x), Mogilevsky, Alexander (1x), Smyslov, Vladimir (1x), Tarnowski, Alfred (1x), Marsalek, Josef (1x), Tsagan, T (1x), Shapiro, Adam (1x)

10.Be2 — 0.9% (43 parties)

Ambassadeurs : Fine, Reuben (1x), Mugridge, Donald (1x), Sterk, Karoly (1x), Becker, Albert (1x), Nei, Iivo (1x), Witkowski, Stefan (1x), Tarnowski, Alfred (1x), Orbaan, Constant (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	10.Bd3	10.Bg5	10.Qe2+	10.Be2
<1800	137	88%	6%	2%	—
1800-2200	1682	87%	8%	1%	1%
2200-2600	2011	95%	3%	1%	1%
2600+	51	100%	—	—	—

Évolution par décennie (% des parties)

Décennie	N parties	10.Bd3	10.Bg5	10.Qe2+	10.Be2
1880s	3	—	100%	—	—
1890s	3	67%	33%	—	—
1900s	24	79%	12%	—	—
1910s	1	100%	—	—	—
1920s	4	50%	25%	—	—
1930s	7	57%	29%	—	14%
1940s	24	83%	4%	4%	4%
1950s	67	87%	7%	—	4%
1960s	116	90%	7%	2%	—
1970s	120	88%	8%	—	1%
1980s	207	91%	7%	0%	0%
1990s	707	87%	9%	1%	1%
2000s	1502	89%	6%	2%	1%
2010s	1327	93%	5%	1%	1%
2020s	518	95%	3%	1%	0%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
10.Bd3	93%	95%	▲ +2.0%
10.Bg5	5%	3%	▼ -2.0%
10.Qe2+	1%	1%	-0.4%
10.Be2	1%	0%	-0.2%

Joueurs célèbres

Champions du monde dans cette position

Kramnik, Vladimir — 3 parties
Smyslov, Vladimir — 2 parties
Karpov, Anatoly — 2 parties
Kasparov, Garry — 2 parties
Alekhine, Alexander — 1 partie
Lasker, Emanuel — 1 partie
Tal, Mikhail — 1 partie
Anand, Viswanathan — 1 partie

Parties historiques

10.Bd3 — 90.2% (4174 parties)

1897 — D Marco, Gianni vs Schiffers, Emanuel — 1/2-1/2 — Berlin GER
1898 — D Marco, Gianni vs Schiffers, Emanuel — 0-1 — Vienna AUT
1900 — Physick, Thomas vs Blackburne, Joseph — 0-1 — London ENG
1901 — Chigorin, Mikhail vs Marchand, Max — 0-1 — Monte Carlo MNC
1901 — Janowski, Dawid vs Blackburne, Joseph — 1-0 — Monte Carlo Monte Carlo MNC

10.Bg5 — 6.0% (278 parties)

1881 — Schmid, Christoph vs Blackburne, Joseph — 0-1 — Berlin GER
1883 — Caceres Richter, Dylan vs Tarrasch, Siegbert — 0-1 — Halle GER
1885 — Cambridge, Gregory vs Bedlam — 0-1 — cr.
1899 — Agues Marco, Leo vs Mieses Cotes, Alejandro Rainier — 1/2-1/2 — London ENG
1900 — Pillsbury, Harry vs Mieses, Jacques — 1/2-1/2 — Paris FRA

10.Qe2+ — 1.3% (59 parties)

1942 — Mogilevsky, Alexander vs Smyslov, Vladimir — 0-1 — Kuibyshev
1961 — Tarnowski, Alfred vs Marsalek, Josef — 1-0 — Bucharest ROU
1962 — Tsagan, T vs Shapiro, Adam — 0-1 — Varna BUL
1980 — Gazik, Igor vs Van Riemsdijk, Herman C. — 1/2-1/2 — Le Havre
1991 — Hazai, Laszlo Dr. vs Khenkin, Igor — 1/2-1/2 — Cansys GM-Nov

10.Be2 — 0.9% (43 parties)

1930 — Sterk, Karoly vs Becker, Albert — 0-1 — Vienna AUT
1943 — Fine, Reuben vs Mugridge, Donald — 1-0 — Washington, DC USA
1950 — Blau, Max vs Emden, Hermann — 1/2-1/2 — Lucerne SUI
1959 — Nei, Iivo vs Witkowski, Stefan — 1/2-1/2 — Riga LAT
1959 — Tarnowski, Alfred vs Orbaan, Constant — 0-1 — Krakow POL

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	● d5
Arriérés	—	—
Chaînes	● b2→a3	—
Passés	—	—
Majorité	● aile_dame 3v2	● centre 1v0

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● b5 (2v0)	● e4 (2v1), ● g4 (2v1)
Cases faibles	—	● d5
Centre	—	● e4 (2v1), ● e5 (1v0)

Colonnes et diagonales

	♔ Blancs	♚ Noirs
Ouvertes	● e	● e
Semi-ouvertes	● d	● c

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bf1	● Bf1 Non développé (mob. 5)
Bc8		● Bc8 Non développé (mob. 5)
Paire de fous	● Oui	Non
Non développées	4 (c1, f1, a1, h1)	3 (c8, a8, h8)

Sécurité du roi

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

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	asymétrique
Ruptures	● f2-f3	● …d5-d4

Partie
1900 London – Round 3 – Teichmann, Richard – 0-1 – Blackburne, Joseph – G11 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bg5 O-O
1900 Paris+ – Round ? – Pillsbury, Harry – 1/2-1/2 – Mieses, Jacques – G22 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bg5 O-O
1901 It (Men) Monte Carlo MNC – Round 13 – Chigorin, Mikhail – 0-1 – Marchand, Max – G29 1. e4 c5 2. Nc3 e6 3. Nf3 Nc6 4. d4 cxd4 5. Nxd4 Nf6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 Bg4
1901 Monte Carlo – Round 1 – Marco, Georg – 0-1 – Mieses, Jacques – G6 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Nf6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bf4 O-O
1904 USA-07.Congress – Round 4 – Shrader, EW. – 0-1 – Jaffe, Charles – G11 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 Bb4 6. Nb5 Nf6 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bg5 d4
1905 Hauptturnier A – Round 1 – Cohn, Erich – 1-0 – Benima, Fred – G2 1. e4 c5 2. Nf3 Nc6 3. Nc3 e6 4. d4 cxd4 5. Nxd4 Nf6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 Be6
1906 Stockholm – Round 8 – Marco, Georg – 1/2-1/2 – Mieses, Jacques – G31 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 Bg4
1924 Hastings Premier Section 1 /25 5th – Round 1 – Michell, Reginald – 1/2-1/2 – Seitz, Jakob Adolf – G1 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4 6. Nb5 Nc6 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bg5 O-O
1931 Praag ol – Round 13 – Kostic, Boris – 0-1 – Wagner, Heinrich – G4 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 Bg4
1942 Kuibyshev – Round 6 – Mogilevsky, Alexander – 0-1 – Smyslov, Vladimir – G31 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Qe2+ Be6
1944 La Plata Jockey Club – Round 2 – Rebizzo, Cayetano – 1/2-1/2 – Iliesco, Juan – G11 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 Bg4
1950 SUI Ch – Round 7 – Blau, Max – 1/2-1/2 – Emden, Hermann – G17 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Be2 Bf5
1951 Mar del Plata zt – Round 8 – Dantas, Neimar de Oliveira – 0-1 – Bolbochan, J. – G79 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 h6
1953 Mitropa Cup – Round 2 – Walther, Edgar – 1/2-1/2 – Gragger, Thomas – G9 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nb5 Nf6 6. N1c3 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bg5 O-O
1955 JUG Ch – Round 10 – Trajkovic, Mihajlo – 1/2-1/2 – Gligorić, Svetozar – G11 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bg5 O-O
1956 CSR Ch – Round 1 – Blatny, Frantisek – 1/2-1/2 – Marsalek, Josef – G6 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 h6
1957 FRG Ch – Round 1 – Unzicker, Wolfgang – 1/2-1/2 – Eisinger, Max Jr – G3 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 Bg4
1959 Alekhine Memorial – Round 11 – Smyslov, Vasily – 1/2-1/2 – Olafsson, Fridrik – G61 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 h6
1959 Krakow – Round 8 – Tarnowski, Alfred – 0-1 – Orbaan, Constant – G30 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Be2 d4
1959 Moscow – Round 11 – Smyslov, Vladimir – 1/2-1/2 – Olafsson, Fridrik – G26 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 h6
1959 Riga – Round 1 – Nei, Iivo – 1/2-1/2 – Witkowski, Stefan – G39 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Be2 d4
1960 Aalborg – Round 1 – Nielsen, Hartvig – 1-0 – Blom, Kaj – G18 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 Bg4
1961 Bucharest GMT 5th – Round 3 – Tarnowski, Alfred – 1-0 – Marsalek, Josef – G13 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Qe2+ Be6
1961 Oberhausen etc – Round 1 – Llado Lumbera, Jaime – 1/2-1/2 – Montoya Eisinger, Maximiliano – G37 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 Ne5
1962 Sweden – Round 1 – Nilsson, Zandor – 1-0 – Dahl Schutt, Frederik – G18 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 Bg4
1963 Halle zt – Round 1 – Ivkov, Borislav – 1/2-1/2 – Hamann, Slawomir – G84 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 Bg4
1964 DEN Ch Holstebro – Round 2 – Petersen, Finn – 1/2-1/2 – Blom, Kaj – G7 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 Bg4
1964 FRG Ch qual 9th – Round 7 – Huebner, Robert – 1/2-1/2 – Eisinger, Max Sr – G24 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 Bg4
1965 Corr – Round 1 – Bruchner – 1/2-1/2 – Blom, Kaj – G19 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bg5 O-O
1965 Tallinn ch-URS – Round 1 – Gufeld, Eduard – 1-0 – Bukhman, Eduard – G105 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 d4
1966 CSR Ch Int 1st – Round 4 – Padevsky, Nikola – 1/2-1/2 – Bilek, Istvan – G20 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 d4
1967 FRG Ch Kiel GER – Round 7 – Hecht, Hans-Joachim – 1/2-1/2 – Suess, Alois – G28 1. e4 c5 2. Ne2 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 d4
1967 Moscow RUS – Round 1 – Shamkovich, Leonid – 1/2-1/2 – Antoshin, Vladimir S – G11 1. e4 c5 2. Nf3 e6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 Nf6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 d4
1967 Reggio Emilia ITA – Round 10 – Matulovic, Milan – 1-0 – Navarovszky, Laszlo – G17 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 d4
1967 Sochi – Round 14 – Damjanovic, Mato – 1/2-1/2 – Zaitsev, Alexander – G113 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 d4
1967 US Open – Round 7 – Byrne, Robert E – 1-0 – Goichberg, William – G20 1. e4 c5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 cxd4 5. Nxd4 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 d4
1968 IBM I – Round 4 – Ciric, Dimitrije – 1/2-1/2 – Shamkovich, Leonid – G17 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 d4
1968 Palma de Mallorca – Round 6 – Matanovic, Aleksandar – 1-0 – Toran Albero, Roman – G58 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 Nf6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 d4
1968 URS-ch36 – Round 17 – Sakharov, Yuri N – 1/2-1/2 – Zaitsev, Alexander – G10 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 d4
1969 FRG Ch Koenigsfeld GER – Round 1 – Degenhardt, Norbert – 1/2-1/2 – Heinicke, Herbert – G2 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 Bg4
1969 New Zealand Ch – Round 1 – Anderson, Bruce R – 1/2-1/2 – Sarapu, Ortvin – G4 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 h6
1969 Wch jr final A – Round 4 – Vogt, Lothar – 1/2-1/2 – Urzica, Aurel – G12 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 d4

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