[Event "Mar del Plata International-21"]
[Site "Mar del Plata"]
[Date "1958.04.01"]
[Round "15"]
[White "Sumar, Julio"]
[Black "Olivera, Alfredo"]
[Result "1/2-1/2"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 Nbd7 6. Rc1 c6 7. Nf3 O-O 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5 13. dxe5 Nxe5 14. Nxe5 Qxe5 15. f4 Qf6 16. Qc2 Be6 17. Rd1 Bxc4 18. Rxc4 Rad8 19. Rcd4 Rxd4 20. Rxd4 Rd8 21. Rxd8+ Qxd8 1/2-1/2