One of the exhibits at the International Quilt Festival, Chicago, was the Wicked Cherrywood Challenge. This was one of the exhibits that did not allow photographs as they had a book of all the pieces for sale. However, I did not see the sign until after I had taken a picture! Lucky the photo police didn't catch me. The colours used in this challenge were quite interesting as were the quilted pieces!
Here's a list of sites where you can read about this challenge and see some more of the quilts: