Hitori is a numerical puzzle invented in Japan. It is a square grid ranging from 3x3 to 30x30 cells, each containing a number or letter.
No row or column should contain repeating symbols. The player’s goal is to find the incorrectly placed numbers and mark them black.
Black cells must not be connected horizontally or vertically, but diagonal adjacency is allowed.
Unmarked cells must be connected to others and form a single area.
The program highlights cells with duplicates in a row or column in red (brighter if duplicated in both).
Green can be used to mark cells as guaranteed not to be black for convenience, but this does not affect the solution check.
The number of black cells must not exceed the specified limit.
Pro? Record a master class and get V.I.P.
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