Do you consider add some time penalty for bad solution?
I prefer put one or two last pieces in random and see if I did right. That definitely saves time. If it will be some kind of penalty player would think twice before spam solution button. They can take risk or finish puzzle safe.
I prefer put one or two last pieces in random and see if I did right. That definitely saves time. If it will be some kind of penalty player would think twice before spam solution button. They can take risk or finish puzzle safe.