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Added Akari and Hashiwokakero puzzles to The pick of the puzzles page Aug 3, 2015

Most popular Akari and Hashiwokakero puzzles are available to members. Play them in the members area, in The pick of the puzzles page.

Result of the 219th nikoli.com Puzzle Championship Jul 25, 2015

Congratulations! aji won the 219th 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. Aug 8, 2015 02:30 (UTC). Please note the start time. The time trial problem will be a Slitherlink puzzle contributed by bay wolf Jr.

The Nikoli Derby - 15th world championship Jul 22, 2015

The Nikoli Derby - 15th world championship Please join nikoli original easygoing party game The Nikoli Derby. The winners will receive an original Nikoli T-shirt.

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!

Maintenance finished Jul 17, 2015

About 10 minutes after 05:00 Jul 17, 2015(UTC).

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

Added Botsu Bako problem Jun 16, 2015

SAKAMOTO, Nobuyuki's Satogaeri problem is open to members. Try it out on the Botsu Bako (Extra Special Problems) page in the members area.

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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