Initially activate the "Auto" option for converting single digit pencil marks into regular entries (only for initial setting, not changing the current mode).
When highlighting all related cells, highlights follow your cursor movements. (Otherwise follow your clicks.)
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Under the pencil mark mode, if you prefer all new single digit entries to be in normal font size (i.e., no single digit pencil marks), just check the "Auto" option on the left. May also check the first option below the grid to change the default setting.
First click to select a digit on the right side bar. Then click on the square in the grid where you want to place the selected digit. To switch back to the default keyboard mode, simply press the keyboard button. When finished, press "Done".
Best Time: 03:27
Play and see if you can beat the best time of this puzzle. This archived challenge is no longer open for competition and therefore no time submission will be accepted at this time. However you can still play it for fun and compare your time with the Top 10 Best Times below.