These terms describe how PlayShikaku.com may be used. By using the site, you agree to use it for personal, lawful puzzle play and not to interfere with the service or its payment and license systems.
PlayShikaku.com offers free Shikaku puzzles in the browser. The game requires JavaScript and stores progress locally on your device. No account is required.
The optional one-time unlock enables the complete curated puzzle library, additional difficulty tiers, and infinite puzzle generation. The unlock is represented by a license key stored in your browser. Clearing browser data, changing devices, or using a private browsing session may require entering the license key again.
Puzzles, generated boards, guides, and site text are provided for entertainment and education. We aim to provide uniquely solvable puzzles, but the site is offered as-is and may change over time.
We may update, remove, or change features, difficulty tiers, puzzle counts, or unlock mechanics as the site develops. We work to keep the game available, but uninterrupted availability is not guaranteed.
PlayShikaku.com is an independent puzzle site. Shikaku is a puzzle type popularized by Nikoli; this site is not affiliated with or endorsed by Nikoli.
For support, use the support channel linked from the purchase or support flow. We do not publish a direct email address on this site.