Sudoku Puzzle Inspired Quilt

Once I started sewing, all these ideas came into my head, and I can't just sew one quilt at a time. So while the other quilt is being pinned, I started to sew these batik pieces together. I have made 2 groups of 9 squares so far. This block, comes from something I tried to do last year, and made a mistake with my sewing, and ended up with this block. I liked the look of it and kept one aside to use as a future project. When I was sorting out my stash, I found it again, and thought I would use it with some batik prints. I am going to make 9 different groups, and then try and arrange the blocks into a Sudoku puzzle quilt.