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.
Added Botsu Bako problem Aug 25, 2014
nyoroppyi's Akari problem is open to members. Try it out on the Botsu Bako (Extra Special Problems) page in the members area.
Result of the 195th nikoli.com Puzzle Championship Aug 24, 2014
Congratulations! Butabi won the 195th 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. Sep 5, 2014 13:00 (UTC). The time trial problem will be a Satogaeri puzzle contributed by T.Karino.
Maintenance finished Aug 22, 2014
About 60 minutes after 05:00 Aug 22, 2014(UTC).
Due to scheduled maintenance, you could not access to the nikoli.com. Sorry for the inconvenience.
Author interviews Vol.40Aug 8, 2014
Our guest this time is alkaline. He is the father of one child and now in his late thirties. He is living in Sapporo, and uses the pseudonym 'alkaline factory head' in Nikoli books. His job is as a company employee related to IT.
Added Akari and Hashiwokakero puzzles to The pick of the puzzles page Aug 1, 2014
Most popular Akari and Hashiwokakero puzzles are available to members. Play them in the members area, in The pick of the puzzles page.
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!