Welcome to nikoli.com! Enjoy nikoli puzzles online!

Information -+

Thank you!

We have discontinued membership services from Sep 10th, 2018. Thank you so much for having played nikoli.com for many years.

All members will be able to log in until Mar 31st, 2019 and enjoy the puzzles published within the most recent 180 days as well as the puzzles in the "Botsu Bako" and "Pick of the puzzles" sections.

Maintenance finished Jan 18, 2019

About 2 minutes after 05:00 Jan 18, 2019(UTC).

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

Added Heyawake and Masyu to The pick of the puzzles pageJan 7, 2019

Added Heyawake and Masyu to The pick of the puzzles page in the members only corner.

Results of the Nikoli Derby - 18th world championshipSep 27, 2018

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

Look here for the results of The Nikoli Derby - 18th world championship.

We hope you are one of the winners!

Result of the 300th nikoli.com Puzzle ChampionshipSep 7, 2018

Congratulations! MOR and LoveBeer won the 300th Puzzle Championship! The winner's name is now displayed and will remain on the Champion page of nikoli.com Hall of Fame.

This was the last championship. Thank you very much to all players!

Collection of problems

TypeTotalPlayableUnsolvedOnly openIncompleteSolved
Slitherlink1522000
Nurikabe 1611000
Heyawake 1711000
Akari1622000
Hitori1244000
Masyu1522000
Shikaku1611000
Hashiwokakero1511000
Numberlink1311000
Yajilin1322000
Shakashaka1644000
Satogaeri1622000
Norinori1533000
Kakuro1122000
Sudoku1144000
Ripple Effect1033000

Members who have reached the maximum number of problems can play the "Total" number of problems.