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.
Announcement of the maintenance work Ang 18, 2014
from Fri, Aug. 22nd 05:00(UTC), about 2 hours
You will not able to get access to the nikoli.com during this time. Sorry for the inconvenience.
Result of the 194th nikoli.com Puzzle Championship Aug 10, 2014
Congratulations! Rou won the 194th 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 Sun. Aug 24, 2014 13:00 (UTC). The time trial problem will be a Kakuro puzzle contributed by Ogawa Minori.
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!
Added Botsu Bako problem Jul 14, 2014
aspirin's Yajilin problem is open to members. Try it out on the Botsu Bako (Extra Special Problems) page in the members area.