Here is a very clever design by Alexander. The 10 pieces are all made up of hexagons and each one increase in size from one to 10. There are many challenges to this puzzle and the first few are rather easy. But, they do become much more challenging as you go along. I created two versions of this puzzle. One has all the pieces the same color, which I feel makes visualizing the problem a bit easier. You decide!
An instruction sheet is enclosed and shows you all the challenges.