Version: 0.5 (using 4.3.00 (KDE 4.3.0), Debian packages) Compiler: cc OS: Linux (x86_64) release 2.6.30.4 In somes sudoku games you sometimes reach a state, where the next step is not obvious. It would be nice to have some "bookmark" feature to save the current state of the game undo/redo vise. Since when you later discover that you chose the wrong step, you have to be carefult to undo the right number of moves to go back to "that previous state where you knew the fork happened".