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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 Sep 21, 2018

About 20 minutes after 05:00 Sep 21, 2018(UTC).

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

Entry to The Nikoli Derby was closed Sep 18, 2018

We will announce the ranking of all participants of the 18th Nikoli Derby on Thu. Sep 27th.

Result of the 300th nikoli.com Puzzle Championship Sep 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!

Added Hitori, Kakuro and Ripple Effect puzzles to The pick of the puzzles page Sep 3, 2018

Most popular Hitori, Kakuro and Ripple Effect puzzles are available to members. Play them in the members area, in The pick of the puzzles page.


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