PIXEL UP! › Brain Teasers › Number Dojo
Number Dojo
Every row, column and 3×3 box holds 1 to 9 exactly once. Each board is freshly generated with exactly one answer. Three mistakes and you are out.
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How to play
Click a cell · 1-9 fill · arrows move · N pencil notes · Backspace erase
Works with a keyboard on desktop and with taps or swipes on a phone.
About Number Dojo
Number Dojo is a free brain teasers game on PIXEL UP!, a comic + anime browser arcade of hand-built games. It runs right in this tab — nothing to install, no account needed. Your best score and play count are kept in your own browser.