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.
What's new
Announcement of the maintenance work Jun 17, 2013
from Fri, Jun. 21st 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 164th nikoli.com Puzzle Championship Jun 16, 2013
Congratulations! pisaca won the 164th 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. Jun 30, 2013 13:00 (UTC). The time trial problem will be a Ripple Effect puzzle contributed by aiko.
Satogaeri!! Jun 10, 2013
nikoli.com started to release Satogaeri puzzles in the members area from Jun 10th(JST).
Move the circles to their home countries. Enjoy the fun of solving a Satogaeri.
Author interviews Vol.37Jun 6, 2013
Our guest this time is Z_H. He is in his 30s, a bachelor. His job is IT-related. He makes Hitori mainly in nikoli.com. He invented Satogaeri in 2002.
Added Shikaku, Sudoku and Shakashaka puzzles to The pick of the puzzles page Jun 4, 2013
Most popular Shikaku, Sudoku and Shakashaka puzzles are available to members. Play them in the members area, in The pick of the puzzles page.
Added Botsu Bako problem May 20, 2013
mimic's Masyu problem is open to members. Try it out on the Botsu Bako (Extra Special Problems) page in the members area.
Problem lists improved Apr 11, 2013
We improved the problem lists for each puzzle. In new lists, the puzzles which are going away within 7 days have a red frame and a remaining time. Please check them.
