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Maintenance finished Dec 15, 2017

About 10 minutes after 05:00 Dec 15, 2017(UTC).

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

The Nikoli Derby - 17th world championship Dec 14, 2017

The Nikoli Derby - 17th world championship Please join nikoli original easygoing party game The Nikoli Derby. The winners will receive an original Nikoli T-shirt.

Result of the 281st nikoli.com Puzzle Championship Dec 8, 2017

Congratulations! Hazakura-Hazuki won the 281st 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. Dec 22, 2017 13:00 (UTC). We will set 2 kinds of problems at the same time. aiko's Ripple Effect and Guten's Hitori are waiting for your challenge.

Added Shikaku, Sudoku and Shakashaka puzzles to The pick of the puzzles page Dec 1, 2017

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 Oct 20, 2017

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


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