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The Quadratum Cubicum has no more secrets for you? Then it's time to tackle the anagram "The Secret Quoin is Art!".

Enough with all those squares! What is the biggest rectangle that you can do, without using the solutions of the 9 puzzles (current record 22 pieces and 14x36cm)?

If this puzzle is too simple for you, try to find how to cut a square into five identical squares! This is much less easy... An elegant dissection was proposed by the great Persian mathematician Abu'l-Wafa' in the tenth century. His solution can be found in the references section of this web site.







You found an exciting new way to cut a square into three identical squares and using less pieces than the initial solution of Abu'l-Wafa'? If it is not in the references provided on this web site (see eg original solutions of Jim Loy using 9-pieces and 7-pieces), then we will offer you your own customized puzzle-soluce! The number of possible dissection using less than nine pieces is very important. In fact it is infinite, since there are families of equivalent solutions. Thus we did not finish to discover new ones!

How to demonstrate that it is impossible to find a solution using only five pieces? How many 6-pieces solutions actually exist? Is it possible to generate all solutions using a computer? Many challenges that still remain open.

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