Hitori
A logical number puzzle with a thousand challenges ranging from 5×5 to 14×14 grids.
About This Game
Hitori is a logic puzzle where you eliminate repeating numbers from rows and columns. It has a thousand puzzles of varying sizes and difficulty
Game Rules
The goal of Hitori is to eliminate numbers so that no row or column contains duplicates. But there's a twist - you must follow three simple rules:
- No duplicates: No row or column can have more than one occurrence of any given number.
- No adjacent removals: Removed cells cannot be touching horizontally or vertically.
- Stay connected: Remaining cells must form a single connected continuous area.
Imagine cutting out squares with scissors from a paper puzzle - after removing all marked squares, the puzzle must remain as a single piece of paper.
How to Play
Controls use taps / clicks:
- Single tap: Removes a number (marks it as eliminated)
- Second tap: Circles the number, indicating it should definitely stay
Puzzle Variety
Challenge yourself with puzzles ranging from beginner-friendly 5×5 grids to much bigger 14×14 puzzles. There are exactly 1000 puzzles, 100 of each size.
Solving Techniques (spoilers)
Follow these rules to make solving a breeze:
- Circle for certainty: Once you know a cell cannot be removed, circle it to keep track.
- Mark adjacent cells: When you remove a cell, circle all adjacent cells - they cannot be removed.
- Eliminate duplicates: If a number is circled, any identical numbers in that row or column must be removed.
- Triple rule: In a sequence of three identical adjacent numbers, the center must stay and the ends must be removed.
- Adjacent pairs: With two identical adjacent numbers, if a third identical number appears in the same row or column, it must be removed.
- Sandwich rule: A number with two identical numbers on opposite sides cannot be removed - one of those identical numbers must go.
- Connectivity check: If removing a cell would disconnect the remaining cells, that cell must stay.
(Translation: Good strategy implemented regarding not eliminating adjacent numbers; it makes you check again when you think you have already beaten the level.)