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.

    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.

Dutch Cube Day gift.  Material MDFFit all 8 pieces inside the cuircular tray, showing all 8 different words.DutchCUBE Day36 30  OktoberNKC Voorburg

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

During an International Puzzle Party (IPP) I received a drawing with 2 puzzlesfrom Serhiy Grabarchuk. I made it. Assignment on the back of the box see photo 3.Material 9 cardboard pieces.

During an International Puzzle Party (IPP) I received a drawing with 2 puzzlesfrom Serhiy Grabarchuk. I made it. Assignment on the inside of the box see photo 3Material 9 cardboard pieces.

This puzzle is a copy produced by puzzle design Ton DelsingYears ago I received a drawing of this puzzle from Edward Hordern. I couldn't find it anywhere and decided to copy it.  9 + 1 extra piece ( number 2). Material acrylic.The stripes on the puzzle indicate the slots at the bottom. Horizontal, vertical or a cross. All 4 corners in the tray have a pin. A nice and difficult puzzle.

21 pieces. Material Acrylic. Front black, Back white. Some problems to solve. See below.PUZZLE 1-   Use 21 pieces. Create a rectangle of 6x7 squares.PUZZLE 2-  Use 21 pieces. Create a rectangle of 3x14 squares.PUZZLE 3-  Use 20 pieces. Create a rectangle of 4x10 squares.PUZZLE 4-  Use 18 pieces. Create a rectangle of 4x9 squares.PUZZLE 5-  Use 20 pieces. Create 2 rectangles of 4x5 squares.PUZZLE 6-  Use 18 pieces. Create a square of 6x6 squares.PUZZLE 7-  Use 16 pieces. Create 2 s...

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.Material Acrylic.

I made this puzzle for my wife BEA. 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.  Material acrylic ,90x90x27 mmGood luck.If you have problems to open it, use the green tool. Try to find out why this is in the BOX !!!

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.

Dutch Cube Day gift 2019.15 pieces. Materal acrylic. Some assignments in the box.

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

Old puzzle. Copy produced by puzzle design Ton DelsingPlace the 18 pieces in a square to form an endless chain.Material. Cardboard 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 

This puzzle is a copy produced by puzzle design Ton Delsing.Instuctions in the puzzle and on backside. See images.Material. Cardboard pieces.