[Event "Zonal Halle"]
[Site "Halle/Saale"]
[Date "1963.??.??"]
[Round "?"]
[White "Ivkov, Borislav"]
[Black "Portisch, Lajos"]
[Result "1/2-1/2"]
[ECO "B43"]
[Opening "Sicilian Defense: Kan Variation, Knight Variation"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Be2 Nf6 7. a3 b5 8. O-O Bb7 9. Qd3 d6 10. f4 Nbd7 11. Bf3 Be7 12. Qe2 O-O 13. f5 e5 14. Nb3 Nc5 15. Nxc5 dxc5 16. Bg5 h6 17. Bxf6 Bxf6 18. Nd5 Bxd5 19. exd5 1/2-1/2