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Hitori Help

Rules / Objectives Summary

• Eliminate numbers until there are no duplicates in any row or column.
• Eliminate numbers by marking them in Black.
• You are not allowed to have two Black squares touching horizontally or vertically (diagonally is ok).
• White cells must not be isolated from the rest of the board.

See the Walkthrough or Advanced Ideas for extra tips and tricks.

 What is the objective?You are to eliminate duplicate numbers in the rows and columns.You can only have (at most) one of any given number in each row and column (sometimes none).Sometimes you don't have any of a given number in a row or column.Move your mouse over the puzzle to see the answer.

Walkthrough

 Step 1This is the start of the puzzle.Solve this puzzle for yourself at the same time. Step 2As we're only allowed one <3> in Column 4, one of these squares is Black. Whichever that is, the square between the two must be White. Step 3As we've now found a <5> in Column 4, all other <5>'s in the same Row or Column must be Black. Step 4All squares surrounding a Black one must be White. Step 5We've found a <3> in Column 3, so this square is Black (and those surrounding it are White). Step 6This square is Black as we've already a <3> in Column 4. Step 7We are not allowed isolated White squares, so this square must be White to avoid the <5> in the corner becoming isolated. Step 8We've already a <1> in Column 5, so this square is Black. Step 9These squares must be White to avoid isolated White squares. Step 10These squares are Black as we've already a <4> in Row 3, and a <3> in Column 2. Step 11This square must be White to avoid the bottom White section becoming isolated. Step 12This square must be White as we've already a <1> in Column 2, and the puzzle will then complete. Step 14The completed puzzle.