Everyone knows the problem of 8 queens on a chessboard, In the puzzle is a booklet with all the assignments. But I also came up with my own assignments. Material plastic.1. Make lines with 2 DOTS. Horizontal, vertical or diagonal. I found 32 lines 2. Do this also for 3 DOTS. 13 lines found. 3. Do this also for 4 DOTS. 8 lines found.
At IPP 28 2008 in Prague the participants received a cardboard drawing of this puzzle. I enjoyed making a few, this is the last one I have. An additional slide holder with the history of the towerMaterial MDF.The pieces are covered with transparent foil. You can slide without damage.