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About 130 new puzzles a month!

Members of 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

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200th Puzzle Championship Oct 31, 2014

Puzzle Championship holds 200th puzzle championships on our members page on Sat. Nov 1, 2014 13:00 (UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!

Maintenance finished Oct 17, 2014

About 60 minutes after 05:00 Oct 17, 2014(UTC).

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

Added Botsu Bako problem Oct 6, 2014

SAKAMOTO, Nobuyuki's Slitherlink problem is open to members. Try it out on the Botsu Bako (Extra Special Problems) page in the members area.

Added Slitherlink and Yajilin puzzles to The pick of the puzzles page Oct 1, 2014

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

Author round-table Vol.21Sep 8, 2014

The guests this time are Casty and -4. In the 4th round-table, we talked about radical problems where a lot of originality left a strong impact on solvers. It is the opposite we discuss today. We will talk about problems that aren't radical. From Nikoli we have NyanBaz and Nob.

Results of the Nikoli Derby - 13th world championship Jul 17, 2014

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

Look here for the results of The Nikoli Derby - 13th world championship.

We hope you are one of the winners!

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