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.
This puzzle is a copy produced by puzzle design Ton DelsingThe 2 cards of 1x2 and the 7 cards of 1x3 must be placed in a square of 5x5. In such a way that the color and the bird only appear once per row and column. The birds must be upright.9 cardboard pieces.
