[Event "IBM"]
[Site "Amsterdam"]
[Date "1970.07.16"]
[Round "3"]
[White "Langeweg, Kick"]
[Black "Jongsma, Alexander"]
[Result "1/2-1/2"]

1. Nf3 g6 2. d4 Bg7 3. e4 c5 4. d5 d6 5. Be2 Nf6 6. Nc3 Na6 7. O-O Nc7 8. Nd2 Bd7 9. a4 a6 10. a5 Nb5 11. Ncb1 O-O 12. c3 Qc7 13. Qc2 e6 1/2-1/2