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About 130 new puzzles a month!

Members of nikoli.com can enjoy new puzzles everyday at your own exclusive page.

No payment is necessary for the first month by credit card. A perfect chance to enjoy and get to know nikoli.com.

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What's new

Result of the 214th nikoli.com Puzzle Championship May 15, 2015

Congratulations! catmask won the 214th puzzle championship! The winner's name is now displayed and will remain on the Champion page of nikoli.com Hall of Fame.

The next puzzle championship will be held from Fri. May 29, 2015 13:00 (UTC). The time trial problem will be a Ripple Effect puzzle contributed by -4.

Maintenance finished May 15, 2015

About 15 minutes after 05:00 May 15, 2015(UTC).

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

Added Nurikabe, Numberlink and Satogaeri puzzles to The pick of the puzzles page May 1, 2015

Most popular Nurikabe, Numberlink and Satogaeri puzzles are available to members. Play them in the members area, in The pick of the puzzles page.

Author round-table Vol.23Apr 15, 2015

Here today we have Guten a very familiar author who created Shakashaka. And we also have HIRO FUKUSHIMA who thought up the Heyawake rules. We will talk about "Omopa" today.

Added Botsu Bako problem Apr 7, 2015

nyoroppyi's Heyawake problem is open to members. Try it out on the Botsu Bako (Extra Special Problems) page in the members area.

Results of the Nikoli Derby - 14th world championship Mar 24, 2015

The Nikoli Derby was developed by nikoli as a party game.

Look here for the results of The Nikoli Derby - 14th world championship.

We hope you are one of the winners!

Added Akari and Hashiwokakero puzzles to The pick of the puzzles page Feb 3, 2015

Most popular Akari and Hashiwokakero puzzles are available to members. Play them in the members area, in The pick of the puzzles page.


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