I don't think it works that way. You can finish any puzzle within 24 hours by going to the recent puzzles and finding that puzzle and clicking on retry. If you plan on using the site often, try not to leave any puzzles unsolved. Learn how to solve them before you sign in to play. Otherwise, you will never have 100% as so many on the hall of fame do. I know I wish I had known that as I can never get above 99.9% completion.