> Rik Brouwer (NL) designed very nice puzzles , f.e. Kubusmix (Ipp 22 + design competition) – „Rik-osahedron“ – „T-Rik-ubus“ – „Kringloop“ (design competition IPP 23) and 2003 his „Octahed-Rik“; most of his designs a very amazing geometric interlocking puzzles with very aesthetic appearance