Easy
Best for learning rules, spotting forced 1x1 and 1x2 placements, and practicing clean rectangle drawing.
Choose a practice path by difficulty, format, or solving goal.
The main PlayShikaku game includes free built-in puzzles and optional generated puzzles. This archive explains what each difficulty is best for and links to related guides.
Best for learning rules, spotting forced 1x1 and 1x2 placements, and practicing clean rectangle drawing.
Introduces candidate comparison, edge constraints, and short deduction chains.
Requires systematic scanning, cell ownership, and checking whether one candidate blocks another clue.
Larger boards with longer chains. Work in regions and follow every implication before guessing.
Daily Shikaku Puzzle offers a small practice grid and a solving note. Printable Shikaku Puzzles provides simple offline grids. Beginner Walkthrough and Hard Puzzle Guide explain how to think through placements.
Start with Easy until the rules feel automatic, move to Medium when you can solve without hints, then use the strategy guide before Hard. Extreme puzzles are most enjoyable once you are comfortable tracking candidates mentally.