[Event "Mar del Plata International-26"]
[Site "Mar del Plata"]
[Date "1965.04.08"]
[Round "15"]
[White "Panno, Oscar"]
[Black "Stein, Leonid"]
[Result "1/2-1/2"]

1. Nf3 Nf6 2. c4 e6 3. Nc3 d5 4. d4 c5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 cxd4 8. cxd4 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 O-O 11. Be2 b6 12. O-O Bb7 13. Qe3 Nd7 14. a4 Rc8 15. Nd2 Nf6 16. f3 Qc7 17. Nc4 Rfd8 1/2-1/2