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About 125 new puzzles a month!

Members of nikoli.com can enjoy new puzzles everyday at your own exclusive page.

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What's new

Result of the 128th nikoli.com Puzzle Championship Jan 27, 2012

Congratulations! pisaca won the 128th 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. Feb 10, 2012 12:00 (UTC) and the time trial problem will be a Shikaku puzzle contributed by cubic function.

Author interviews Vol.30Jan 24, 2012

YukiHiro is 22 years old. He studies electric systems as a graduate student and he is an amateur magician.

Added Botsu Bako problem Jan 11, 2012

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

Added Heyawake and Masyu puzzles to The pick of the puzzles page Jan 6, 2012

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

>>> Past information

Sample problems

Slitherlink Getting the loop right is absorbing and addictive. Watch out not to get lost in Slitherlink. Nurikabe Nurikabe stands for "painting walls." The black cells form walls to separate white areas. Watching the walls stretch and link the black cells gives a very real sense of achievement. Heyawake Heyawake is another Nikoli original puzzle. "Heya" means "room," "wake" means "divide," so here you divide the board into rooms. Akari Akari was developed by Nikoli in 2001. This puzzle has very simple rules, but they lead to a complex logical world. Hitori Erase extra numbers to leave only one of each in a row or column. This is a cool puzzle, don't lose yourself in it! Masyu Make a single loop with lines passing through the centers of cells, horizontally or vertically. Shikaku Shikaku is another original Nikoli puzzle, which provides a special sense of solving while complying with a very simple rule. Hashiwokakero In Hashiwokakero you are the king of the islands, and your job is to connect the islands. Numberlink Numberlink puzzle requires inspired guessing and puzzling sense. Kakuro As a beginner you need to add and subtract, but when you get used to Kakuro you will learn to rely more on logic and less on calculations. Sudoku Sudoku is a simple and friendly puzzle. Its 9x9 world has its own deep acute logic.

Take a break puzzles

Jigsaw Puzzle

Unique animated jigsaw puzzles easy to play with.

Four Color Problem

Paint the map with 4 colors so that the same colors, do not touch on a side.

Links in this site

Nikoli publications

All our magazines and books are available at the "Purchase Nikoli Books" page of WEB Nikoli.

Nikoli Vol.137

Nikoli Vol.137

Gekikara (Super Hard) Sudoku10

Gekikara (Super Hard) Sudoku10

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