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.
Result of the 206th nikoli.com Puzzle Championship Jan 23, 2015
Congratulations! deu won the 206th 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 Sat. Feb 7, 2015 13:00 (UTC). The time trial problem will be a Heyawake puzzle contributed by aiko.
Maintenance finished Jan 16, 2015
About 10 minutes after 05:00 Jan 16, 2015(UTC).
Due to scheduled maintenance, you could not access to the nikoli.com. Sorry for the inconvenience.
The Nikoli Derby - 14th world championship Jan 15, 2015
Please join nikoli original easygoing party game The Nikoli Derby. The winners will receive an original Nikoli T-shirt.
Author interviews Vol.41Jan 13, 2015
Our guest this time is oku-yama. He is in his early 30s. He is doing clerical work. He tells us that it's the type of job where he is required to be very very cautious.
Added Botsu Bako problem Jan 13, 2015
cubic function's Shikaku problem is open to members. Try it out on the Botsu Bako (Extra Special Problems) page in the members area.
Added Heyawake and Masyu puzzles to The pick of the puzzles page Jan 6, 2015
Most popular Heyawake and Masyu puzzles are available to members. Play them in the members area, in The pick of the puzzles page.
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.