[Event "Mar del Plata International-24"]
[Site "Mar del Plata"]
[Date "1961.03.29"]
[Round "14"]
[White "Silva Nazzari, Roberto"]
[Black "Perez Perez, Francisco Jose"]
[Result "1/2-1/2"]

1. c4 e5 2. Nc3 Nf6 3. g3 c6 4. Bg2 d5 5. cxd5 cxd5 6. Qb3 Nc6 7. Nxd5 Nd4 8. Nxf6+ Qxf6 9. Qd1 Bf5 10. d3 Rc8 11. Rb1 Bb4+ 12. Kf1 O-O 13. Nf3 Nxf3 14. Bxf3 Rfd8 15. e4 Bh3+ 16. Bg2 Bc5 17. Qe2 Bg4 18. f3 Qa6 19. b4 Bd4 20. fxg4 1/2-1/2