Items Invented by Wim Henk Bodlaender
- Contest: the 9 Queens Problem. Put 9 queens and 1 or 2 pawns such that queens do not see each other. Send your solution before Feb 29, and win a book! Author: Hans L. Bodlaender.
- Queens and Pawns . Try to arrange nine Queens and a Pawn on a standard Chess board so that none of them attack each other. Author: Doug Chatham.