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Result of the 233rd nikoli.com Puzzle Championship Feb 6, 2016

Congratulations! hrs won the 233rd 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 20, 2016 13:00 (UTC). We will set 2 kind of the time trial problems at the same time. Both puzzles are Satogaeri puzzles, contributed by Casty and the ax and sword.

Added Akari and Hashiwokakero puzzles to The pick of the puzzles page Feb 2, 2016

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 24 hour janken Jan 26, 2016

24 hour janken is a simple and easy game. It is a championship with janken (the well known rock-paper-scissors game), which is a popular game among Japanese.

Look here for the results of the 24 hour janken.

Maintenance finished Jan 15, 2016

About 40 minutes after 05:00 Jan 15, 2016(UTC).

Due to scheduled maintenance, you could not access to the nikoli.com. Sorry for the inconvenience.

Added Botsu Bako problem Jan 13, 2016

Guten's Shakashaka problem is open to members. Try it out on the Botsu Bako (Extra Special Problems) page in the members area.

Results of the Nikoli Derby - 15th world championship Oct 6, 2015

The Nikoli Derby was developed by nikoli as a party game.

Look here for the results of The Nikoli Derby - 15th world championship.

We hope you are one of the winners!

One Layout Sudokus Jul 17, 2015

One Layout Sudokus This is our 3rd "One layout" project. Here we have 20 of these sudoku puzzles. Try them out!

Author round-table Vol.23Apr 15, 2015

Here today we have Guten a very familiar author who created Shakashaka. And we also have HIRO FUKUSHIMA who thought up the Heyawake rules. We will talk about "Omopa" today.

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