Welcome to nikoli.com! Enjoy nikoli puzzles online!

Information -+

Thank you!

We have discontinued membership services from Sep 10th, 2018. Thank you so much for having played nikoli.com for many years.

All members will be able to log in until Mar 31st, 2019 and enjoy the puzzles published within the most recent 180 days as well as the puzzles in the "Botsu Bako" and "Pick of the puzzles" sections.

Maintenance finished Mar 15, 2019

About 10 minutes after 05:00 Mar 15, 2019(UTC).

Due to scheduled maintenance, you could not access to the nikoli.com. Sorry for the inconvenience.

Added Hitori and Ripple Effect to The pick of the puzzles pageMar 1, 2019

Added Hitori and Ripple Effect to The pick of the puzzles page in the members only corner.

Result of the 300th nikoli.com Puzzle ChampionshipSep 7, 2018

Congratulations! MOR and LoveBeer won the 300th Puzzle Championship! The winner's name is now displayed and will remain on the Champion page of nikoli.com Hall of Fame.

This was the last championship. Thank you very much to all players!