Beginner Tips

Beginner Tips for Shikaku

Start with the clues that have the fewest possible shapes. Small numbers often constrain the board hardest. A clue of `1` is fixed immediately, and clues like `2` or `3` frequently have only a handful of legal placements once borders and nearby clues are considered.

Do not try to “solve the biggest clue first” just because it looks important. Large clues often become easier only after smaller regions take cells away from them. In practice, the most efficient path is usually to reduce uncertainty, not to attack the largest number.

When two or three clues are close together, treat them as a group. Their rectangles compete for the same cells, which means they often reveal each other’s boundaries. This is a more productive mindset than scanning the board as isolated clues.

Finally, avoid premature guessing. If you find yourself choosing between equally plausible rectangles without a reason, step back and look for a more constrained clue elsewhere. Shikaku rewards structured elimination more than speculative play.