12. Piet Roozenburg - Reinier Cornelis Keller. WK-match 1951.
Piet Roozenburg - Henk Laros. World Championship in International Draughts- 1948.
Piet Roozenburg - Pierre Ghestem. World Championship in International Draughts- 1948.
1. Reinier Cornelis Keller - Piet Roozenburg. WK-match 1951.
12. Wim Huisman (NLD)- Piet Roozenburg (NLD). WK-match 1954.
17. Reinier Cornelis Keller - Piet Roozenburg. WK-match 1951.
15. Reinier Cornelis Keller - Piet Roozenburg. WK-match 1951.
Piet Roozenburg 25 victories ( Wch 1948-1954 )
Piet Roozenburg-Wim de Jong 2-0.Draughts
Geert van Dijk (NLD) - Piet Roozenburg (NLD). Draughts World Championship. 1952.
Wim Roozenburg (NLD) - Piet Roozenburg (NLD). Draughts World Championship. 1952.
6. Piet Roozenburg - Reinier Cornelis Keller. WK-match 1951.
7. Reinier Cornelis Keller - Piet Roozenburg. WK-match 1951.
9. Reinier Cornelis Keller - Piet Roozenburg. WK-match 1951.
8. Piet Roozenburg - Reinier Cornelis Keller. WK-match 1951.
16. Piet Roozenburg - Reinier Cornelis Keller. WK-match 1951.
11. Reinier Cornelis Keller - Piet Roozenburg. WK-match 1951.
Piet Roozenburg (NED) - Maurice Verleene (BEL). World Championship in International Draughts. 1956.
10. Piet Roozenburg - Reinier Cornelis Keller. WK-match 1951.
Reinier Cornelis Keller - Piet Roozenburg. World Championship in International Draughts- 1948.
