easy
3-by-3 grids with 4-5 digits.
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Code Grid
Choose a difficulty
Use each digit from the source grid exactly once. Row and column clues tell you how many digits are exact, misplaced, or absent in that line.
Today's editions
Pick a difficulty
medium
4-by-4 grids with 6-8 digits.
hard
5-by-5 grids with 8-10 digits.
From the rulebook
How to play Code Grid
Code Grid gives you a source grid full of digits and a blank answer grid. Rearrange every source digit into the answer, using each one exactly once.
Each row and column has clue marks comparing the source to the correct answer. A filled dot (●) means that source digit stays put. A hollow dot (○) means that source digit belongs somewhere else in that line. A cross (✕) means that source digit doesn't belong in that line at all. The marks never reveal which cell they refer to, so you combine row and column clues with the digit inventory to narrow down each position.