The most difficult puzzle I have designed. The puzzle consists of 15 pieces. Some pieces can be slid under the edge. Goal: Make the numbers 1 to 9 from left to right in the frame There are different possibilities. But there is only one possibility to slide to a magic square.
If you carefully open the puzzle (press the bottom of the title square piece) you will see a 4. Remember that.
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.
18 different pieces consisting of 2 squares with tail(s) and or head(s).Various assignments in the box. Main assignment. Place the pieces in a 6x6 square and make 18 complete Christmas trees.Material cardboard pieces.