Maintenance finished May 20, 2016
About 10 minutes after 05:00 May 20, 2016(UTC).
Due to scheduled maintenance, you could not access to the nikoli.com. Sorry for the inconvenience.
Result of the 240th nikoli.com Puzzle Championship May 14, 2016
Congratulations! Kota won the 240th 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. May 28, 2016 13:00 (UTC). The time trial problem will be a Masyu puzzle contributed by aiko.
Added Nurikabe, Numberlink and Satogaeri puzzles to The pick of the puzzles page May 2, 2016
Most popular Nurikabe, Numberlink and Satogaeri puzzles are available to members. Play them in the members area, in The pick of the puzzles page.
Added Botsu Bako problem Apr 11, 2016
Guten's Yajilin problem is open to members. Try it out on the Botsu Bako (Extra Special Problems) page in the members area.