[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1970.01.16"]
[Round "4"]
[White "Filip, Miroslav"]
[Black "Bobotsov, Milko Georgiev"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Ne2 d5 6. a3 Be7 7. cxd5 Nxd5 8. Qc2 Nd7 9. Bd2 Nxc3 10. Nxc3 e5 11. dxe5 Nxe5 12. Be2 Bg4 13. Bxg4 Nxg4 14. Rd1 c6 15. h3 Nf6 16. O-O Qc8 17. Ne2 Re8 18. Bc1 a5 19. b3 Qe6 20. Bb2 Rad8 1/2-1/2