Copy produced by puzzle design Ton Delsing. Old Puzzle. The following text is printed on the back of the box.With the 9 pieces a large square or other figuresis to be formed in such a way that the same colour shal not occur more then once in any row horizontal or vertical (in the square also diagonal) This must be done for each symbol..Material . Cardboard pieces
This puzzle is a copy produced by puzzle design Ton Delsing.Slide the numbers into order. Start: remove orange center piece .Green pieces are immovable. Material MDF.The letters are covered with transparent foil. You can slide without damage.
Old puzzle. Copy produced by puzzle design Ton Delsing.9 cardboard pieces. The puzzle was patented in 1911, This variation on Thurston's puzzle was used as an advertisement for soap. The idea was to arrange the cards so that each center circle contained four different colors and each half circle contained two.
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. The numbers are engraved in the pieces. Matrial Acrylic.If you carefully open the puzzle (press the bottom of the title square piece) you will see a 4. Remember that.
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