12 pieces with inlaid letters. Pieces with tongue and groove. All pieces 20x20 mmSlide from the starting position ALBWHITE CK!!ET TO !WHITE !BLACK! On the back there is a slide up and down. This slide changes the free hole.Then slide to BLACK! WHITE!  easy?Material Acrylic. 

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. Material acrylic.If you carefully open the puzzle (press the bottom of the title square piece) you will see a 4. Remember that.

Try to open the puzzle by removing the 4 cylinders with the numbers. (2014 is year of design). Inlaid numbers. Materal acrylic.If you have problems to open it, use the green tool.But try to find out why this tool is  in the BOX!!!GOOD LUCK!

    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.

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.

An old puzzle. Copy produced by puzzle design Ton Delsing.Assignment inside lid. See photo 3. 9 cardboard pieces.

In a IPP special of his newsletter "PUZZLETOPIA" Nob published this L Puzzle12 pieces.This puzzle is a copy produduced by puzzle design Ton Delsing Front black. Back white. Put 12 pieces into  a 7x7 square. Black side up.Rotation are permitted, turnover is forbidden.Inlaid letters. Material Acrylic.

TRICK OPENING  I made this puzzle in 1980 in wood for my wife BEA. She passed away in 2015. I then decided to make this puzzle in acrylic,It has become a very special puzzle. It is a coincidence that this was possible. Be careful with it. Try to open the puzzle by removing the 3 cylinders with the letters. And be amazed at what is inside.  Inlaid letters. Material acrylic ,90x90x27 mmGood luck.Please note!! If your wife has the same first name, BEA, this is a great gift.If you have proble...

Copy of this puzzle made by puzzle design Ton Delsing in 2011

Copy produced by puzzle design Ton Delsing.F. D. The world famous Initials. Frank Delano Roosevelt's Initials.Registered U.S. Patent Office.The F consisted of 5 red pieces, the D of 6 blue pieces.Material. Thin Plastic.

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. 

Gift on BEA'S birthday in a flat box.  I made a nice box for her.Place the 7 octagons on top of each other, yellow pieceon the bottom. Make the text: BEA 70 YEARS 1937-2007  7 transparent pieces

A very nice puzzle for children!!! 9 pieces and 4 eyes.  Front 9 red and back 9 different colors .You can make: faces, figures, numbers and the alphabet. Solve the 144 problems in the booklet or make your own faces and figures. Turn the solution over. You will then get a colorful image. Also make a monogram AD of the designer. One in red and one in 9 different colors. Material sign plastic.This is the only of my designs with a solution booklet. Of course not to give to the children!Some examp...

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 

A very nice puzzle. Read these instructions. Make from these 21 TRANSPARENT hexagons, 7 hexagons, each consisting of 3 pieces.Each hexagon must have 6 different numbers.You now have 7 hexagons with 7 different centre colours.WHITE (blank), YELLOW, PURPLE, RED, GREEN, BLUE and ORANGE .Place the piece with one of these colors in the center and try one of 7 problems on the back of the puzzle. Repeat with all the other colors. To taal 49 puzzlesPut the 7 hexagons in the open spa...

A fun puzzle for children. 9 pieces, front red, back blue. And 4 eyes. 9 pieces and 4 eyes. Booklet with fun assignments. Or make your own figures or faces. Main assignment. Make 4 different red JD monograms. Make 4 different blue JD monograms. Material Acrylic. Example:

This puzzle is a copy produced by puzzle design Ton Delsing.8 pieces. Material plastic.

Copy produced by puzzle design Ton Delsing.8 pieces. Material acrylic. Match the colours in a 4x4 square.

IN CARDBOARD BOX (NEW)

NEW