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Result of the 224th nikoli.com Puzzle Championship Oct 2, 2015

Congratulations! MYU won the 224th 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 Fri. Oct 16, 2015 13:00 (UTC). The time trial problem will be a Masyu puzzle contributed by T.Karino.

Added Slitherlink, Yajilin and Norinori puzzles to The pick of the puzzles page Oct 1, 2015

Most popular Slitherlink, Yajilin and Norinori puzzles are available to members. Play them in the members area, in The pick of the puzzles page.

Entry to The Nikoli Derby was closed Sep 29, 2015

We will announce the ranking of all participants of the 15th Nikoli Derby on Tue. Oct 6th.

Added Botsu Bako problem Sep 25, 2015

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

Maintenance finished Sep 18, 2015

About 10 minutes after 05:00 Sep 18, 2015(UTC).

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

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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