Latest information
Result of the 32nd nikoli.com Puzzle Championship May 9, 2008
Congratulations to H.Jo! H.Jo won the 32nd puzzle championship! H.Jo'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 May 23, 2008 13:00 (UTC) and the time trial problem is a Shikaku puzzle that was contributed by aspirin.
Added Botsu Bako problem May 8, 2008
crimson's Medium Slitherlink problem is open to members. Try it out on the Botsu Bako (Extra Special Problems) page in the members area.
Added Nurikabe puzzles to The pick of the puzzles pageMay 1, 2008
Most popular Nurikabe puzzles are available to members. Play them in the members area, in The pick of the puzzles page.
Author interviews Apr 23, 2008
We are going to publish interviews with puzzle authors, about how they make puzzles.
The Nikoli Derby - 4th world championship Apr 18, 2008
The Nikoli Derby was developed by nikoli as a party game. It has very simple rules that make it exciting and easy for all, from kids to much older players.
For this World Championship we accept Japanese horses from the Japanese pages. We estimate there will be more than 500 horses starting.
Jigsaw puzzle in Spring Apr 14, 2008
Added animated jigsaw puzzle you can play for free in your browser.
2008's April Fools' page Apr 2, 2008
2008's April Fools' page can be seen here. We had prepared seven huge and fabulous puzzles for you.
Past information
32nd Puzzle Championship May 9, 2008
nikoli.com holds 32nd puzzle championships on our members page on Fri. May 9 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Result of the 31st nikoli.com Puzzle Championship Apr 25, 2008
Congratulations to aji! aji won the 31st puzzle championship! aji'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 May 9, 2008 13:00 (UTC) and the time trial problem is a Hitori puzzle that was contributed by OLAKE.
31st Puzzle Championship Apr 25, 2008
nikoli.com holds 31st puzzle championships on our members page on Fri. Apr 25 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Maintenance finished Apr 18, 2008
About 15 minutes after 05:00 Apr 18, 2008(UTC).
Due to scheduled maintenance, you could not access to the nikoli.com. Sorry for the inconvenience.
Announcement of the maintenance work Apr 14, 2008
from Fri, Apr. 18th 05:00(UTC), about 2 hours
You will not able to get access to the nikoli.com during this time. Sorry for the inconvenience.
Result of the 30th nikoli.com Puzzle Championship Apr 11, 2008
Congratulations to H.Jo! H.Jo won the 30th puzzle championship! H.Jo'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 Apr 25, 2008 13:00 (UTC) and the time trial problem is a Slitherlink puzzle that was contributed by Komieda.
30th Puzzle Championship Apr 10, 2008
nikoli.com holds 30th puzzle championships on our members page on Fri. Apr 11 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Added Botsu Bako problem Apr 4, 2008
Tea.M's extra hard Sudoku problem is open to members. Try it out on the Botsu Bako (Extra Special Problems) page in the members area.
Added Slitherlink puzzles to The pick of the puzzles pageApr 2, 2008
Most popular Slitherlink puzzles are available to members. Play them in the members area, in The pick of the puzzles page.
Result of the 29th nikoli.com Puzzle Championship Mar 28, 2008
Congratulations to moku! moku won the 29th puzzle championship! moku'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 Apr 11, 2008 13:00 (UTC) and the time trial problem is a Akari puzzle that was contributed by akasyo.
29th Puzzle Championship Mar 28, 2008
nikoli.com holds 29th puzzle championships on our members page on Fri. Mar 28 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Maintenance finished Mar 21, 2008
About 30 minutes after 05:00 Mar 21, 2008(UTC).
Due to scheduled maintenance, you could not access to the nikoli.com. Sorry for the inconvenience.
Announcement of the maintenance work Mar 17, 2008
from Fri, Mar. 21st 05:00(UTC), about 2 hours
You will not able to get access to the nikoli.com during this time. Sorry for the inconvenience.
Result of the 28th nikoli.com Puzzle Championship Mar 14, 2008
Congratulations to Kitakaze! Kitakaze won the 28th puzzle championship! Kitakaze'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 Mar 28, 2008 13:00 (UTC) and the time trial problem is a Heyawake puzzle that was contributed by NyanBaz.
28th Puzzle Championship Mar 14, 2008
nikoli.com holds 28th puzzle championships on our members page on Fri. Mar 14 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Results of the Nikoli Derby - 3rd world championship Mar 11, 2008
The Nikoli Derby was developed by nikoli as a party game.
Look here for the results of The Nikoli Derby - 3rd world championship.
Added Botsu Bako problem Mar 7, 2008
juno's extra hard Masyu problem is open to members. Try it out on the Botsu Bako (Extra Special Problems) page in the members area.
Entry to The Nikoli Derby was closed Mar 5, 2008
We will announce the ranking of all participants of The Nikoli Derby on Tue. Mar 11th.
Added Hitori and Kakuro puzzles to The pick of the puzzles pageMar 4, 2008
Most popular Hitori and Kakuro puzzles are available to members. Play them in the members area, in The pick of the puzzles page.
Result of the 27th nikoli.com Puzzle Championship Feb 29, 2008
Congratulations to H.Jo! H.Jo won the 27th puzzle championship! H.Jo'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 Mar 14, 2008 13:00 (UTC) and the time trial problem is a Masyu puzzle that was contributed by Miya.
27th Puzzle Championship Feb 29, 2008
nikoli.com holds 27th puzzle championships on our members page on Fri. Feb 29 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Entry deadline of the Nikoli Derby is Mon. Mar 4, 15:00(UTC)Feb 28, 2008
Please join nikoli original easygoing party game The Nikoli Derby. The winners will receive an original Nikoli T-shirt or the latest volume of "Puzzle Communication Nikoli".
Jigsaw puzzle in Winter Feb 21, 2008
Added animated jigsaw puzzle you can play for free in your browser.
Result of the 26th nikoli.com Puzzle Championship Feb 15, 2008
Congratulations to Hammy! Hammy won the 26th puzzle championship! Hammy'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 Feb 29, 2008 13:00 (UTC) and the time trial problem is a Kakuro puzzle that was contributed by osakana.
26th Puzzle Championship Feb 15, 2008
nikoli.com holds 26th puzzle championships on our members page on Fri. Feb 15 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Maintenance finished Feb 15, 2008
About 35 minutes after 05:00 Feb 15, 2008(UTC).
Due to scheduled maintenance, you could not access to the nikoli.com. Sorry for the inconvenience.
Author interviews Vol.4 - aspirin Feb 12, 2008
The interview with aspirin is open to members.
He talked "I'll keep making puzzles. I want to look after the people who enjoy doing aspirin's puzzles. I hope we will be together for a long time.".
Announcement of the maintenance work Feb 12, 2008
from Fri, Feb. 15th 05:00(UTC), about 2 hours
You will not able to get access to the nikoli.com during this time. Sorry for the inconvenience.
The Nikoli Derby - 3rd world championship Feb 5, 2008
The Nikoli Derby was developed by nikoli as a party game. It has very simple rules that make it exciting and easy for all, from kids to much older players.
Let's register from "The 3rd Nikoli Derby World Championship" page!!
Added Botsu Bako problem Feb 4, 2007
Stukid's extra hard Heyawake problem is open to members. Try it out on the Botsu Bako (Extra Special Problems) page in the members area.
Added Akari puzzles to The pick of the puzzles pageFeb 1, 2008
Most popular Akari puzzles are available to members. Play them in the members area, in The pick of the puzzles page.
Result of the 25th nikoli.com Puzzle Championship Feb 1, 2008
Congratulations to H.Jo! H.Jo won the 25th puzzle championship! H.Jo'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 Feb 15, 2008 13:00 (UTC) and the time trial problem is a Nurikabe puzzle that was contributed by red-magician.
Result of the 24th nikoli.com Puzzle Championship Jan 18, 2008
Congratulations to uri! uri won the 24th puzzle championship! uri'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 Feb 1, 2008 13:00 (UTC) and the time trial problem is a Shikaku puzzle that was contributed by Casty.
Maintenance finished Jan 18, 2008
About 15 minutes after 05:00 Jan 18, 2008(UTC).
Due to scheduled maintenance, you could not access to the nikoli.com. Sorry for the inconvenience.
24th Puzzle Championship Jan 17, 2008
nikoli.com holds 24th puzzle championships on our members page on Fri. Jan 18 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Results of the 2nd Minority Decides Game Jan 15, 2007
The Minority Decides is a nikoli original easygoing party game.
Look here for the results of the 2nd Minority Decides Game.
Announcement of the maintenance work Jan 15, 2007
from Fri, Jan. 18th 05:00(UTC), about 2 hours
You will not able to get access to the nikoli.com during this time. Sorry for the inconvenience.
Masyu!! Jan 10, 2008
nikoli.com started to release Masyu puzzles in the members area from Jan 10th(JST).
Masyu problems Jan 8, 2008
nikoli.com will start to release Masyu puzzles in the members area from Jan 10th(JST).
The first problem of Masyu puzzle will be released at Jan 9, 15:00(UTC).
Entry to The Minority Decides Vol.2 was closed Jan 7, 2008
We will announce the result of The Minority Decides on Tue. Jan 15th.
Result of the 23rd nikoli.com Puzzle Championship Jan 4, 2008
Congratulations to komami-! komami- won the 23rd puzzle championship! komami-'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 Jan 18, 2008 13:00 (UTC) and the time trial problem is a Slitherlink puzzle that was contributed by Yuichi Saito.
23rd Puzzle Championship Jan 3, 2008
nikoli.com holds 23rd puzzle championships on our members page on Fri. Jan 4 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Added Heyawake puzzles to The pick of the puzzles pageJan 1, 2008
Most popular Heyawake puzzles are available to members. Play them in the members area, in The pick of the puzzles page.
Added Botsu Bako problem Dec 28, 2007
mimic's extra hard Shikaku problem is open to members. Try it out on the Botsu Bako (Extra Special Problems) page in the members area.
Masyu sample problems added Dec 27, 2007
nikoli.com now has 10 sample problems of Masyu puzzles. The 2 added problems are "Hard". Give them a try. Can you already solve hard Masyu problems?
nikoli.com will start to release Masyu puzzles in the members area from Jan 10th 2008.
Self-introduction pages Dec 21, 2007
Please try to enter your self-introduction page in the members area. Your self-introduction will be open to the nikoli.com members.
Result of the 22nd nikoli.com Puzzle Championship Dec 21, 2007
Congratulations to Kazunegi! Kazunegi won the 22nd puzzle championship! Kazunegi'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 Jan 4, 2008 13:00 (UTC) and the time trial problem is a Akari puzzle that was contributed by crimson.
Masyu sample problems added Dec 21, 2007
nikoli.com now has 8 sample problems of Masyu puzzles. The 3 added problems are "Medium" and "Hard". Give them a try. Can you already solve hard Masyu problems?
nikoli.com will start to release Masyu puzzles in the members area from Jan 10th 2008.
Maintenance finished Dec 21, 2007
About 25 minutes after 05:00 Dec 21, 2007(UTC).
Due to scheduled maintenance, you could not access to the nikoli.com. Sorry for the inconvenience.
Announcement of the maintenance work Dec 18, 2007
from Fri, Dec. 21st 05:00(UTC), about 2 hours
You will not able to get access to the nikoli.com during this time. Sorry for the inconvenience.
22nd Puzzle Championship Dec 20, 2007
nikoli.com holds 22nd puzzle championships on our members page on Fri. Dec 21 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
9th puzzle of nikoli.com is Masyu Dec 14, 2007
nikoli.com will start publishing Masyu puzzles in our members area from Jan. Try out the sample puzzles of Masyu to get to know this wonderful puzzle.
Result of the 21st nikoli.com Puzzle Championship Dec 7, 2007
Congratulations to tarotaro! tarotaro won the 21st puzzle championship! tarotaro'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 Dec 21, 13:00 (UTC) and the time trial problem is a Heyawake puzzle that was contributed by aspirin.
21st Puzzle Championship Dec 7, 2007
nikoli.com holds 21st puzzle championships on our members page on Fri. Dec 7 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Added Shikaku and Sudoku puzzles to The pick of the puzzles pageDec 3, 2007
Most popular Shikaku and Sudoku puzzles are available to members. Play them in the members area, in The pick of the puzzles page.
The Minority Decides Vol.2 Nov 28, 2007
This is a nikoli original easygoing party game. To take part you choose "yes" or "no" for the questions at the entry page. The winner will receive an original Nikoli T-shirt.
Result of the 20th nikoli.com Puzzle Championship Nov 23, 2007
The recent nikoli.com Puzzle Championship was from Nov 23, 13:00 Fri. (UTC). Hammy(Nurikabe), aji(Sihkaku) and Hugo(Kakuro) won the puzzle championship vol.20. Congratulations!!
The next puzzle championship will be held from Nov 23, 13:00(UTC). We will set 3 kind of problems at the same time. red-magician's Nurikabe, mimic's Hitori and Komieda's Kakuro are waiting for your challenge.
20th Puzzle Championship Nov 23, 2007
nikoli.com holds 20th puzzle championships on our members page on Fri. Nov 23 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Added Botsu Bako problem Nov 19, 2007
Z_H's extra hard Hitori problem is open to members. Try it out on the Botsu Bako (Extra Special Problems) page in the members area.
Maintenance finished Nov 16, 2007
About 50 minutes after 05:00 Dec 16, 2007(UTC).
Due to scheduled maintenance, you could not access to the nikoli.com. Sorry for the inconvenience.
Announcement of the maintenance work Nov 12, 2007
from Fri, Nov. 16th 05:00(UTC), about 2 hours
You will not able to get access to the members page of the nikoli.com during this time. Sorry for the inconvenience.
Result of the 19th nikoli.com Puzzle Championship Nov 9, 2007
Congratulations to jyokun! jyokun won the 19th puzzle championship! jyokun'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 Nov 23, 13:00 (UTC). We will set 3 kind of problems at the same time. red-magician's Nurikabe, mimic's Hitori and Komieda's Kakuro are waiting for your challenge.
19th Puzzle Championship Nov 8, 2007
nikoli.com holds 19th puzzle championships on our members page on Fri. Nov 9 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Added Nurikabe puzzles to The pick of the puzzles pageNov 1, 2007
3 most popular Nurikabe puzzles are available to members. Play them in the members area, in The pick of the puzzles page.
Result of the 18th nikoli.com Puzzle Championship Oct 26, 2007
Congratulations to maysure! maysure won the 18th puzzle championship! maysure'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 Nov 9, 13:00 (UTC) and the time trial problem is a Hitori puzzle that was contributed by mimic.
18th Puzzle Championship Oct 26, 2007
nikoli.com holds 18th puzzle championships on our members page on Fri. Oct 26 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Added Botsu Bako problem Oct 17, 2007
Momotereu's unique Kakuro problem is open to members. Try it out on the Botsu Bako (Extra Special Problems) page in the members area.
Jigsaw Puzzle Oct 16, 2007
Added animated jigsaw puzzle you can play for free in your browser.
Result of the 17th nikoli.com Puzzle Championship Oct 12, 2007
Congratulations to uri! uri won the 17th puzzle championship! uri'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 Oct 26, 13:00 (UTC) and the time trial problem is a Nurikabe puzzle that was contributed by aspirin.
17th Puzzle Championship Oct 12, 2007
nikoli.com holds 17th puzzle championships on our members page on Fri. Oct 12 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Author interviews Oct 5, 2007
We are going to publish interviews with puzzle authors in the members only area, about how they make puzzles.
Maintenance finished Oct 5, 2007
About 20 minutes after 05:00 Oct 5, 2007(UTC).
Due to scheduled maintenance, you could not access to the nikoli.com. Sorry for the inconvenience.
Results of the Nikoli Derby - 2nd world championship Oct 3, 2007
The Nikoli Derby was developed by nikoli as a party game.
Look here for the results of The Nikoli Derby - 2nd world championship.
Added Slitherlink puzzles to The pick of the puzzles pageOct 3, 2007
3 most popular Slitherlink puzzles is opened to our members. Let's play in The pick of the puzzles page in the members area.
Announcement of the maintenance work Sep 30, 2007
from Fri, Oct. 5th 05:00(UTC), about 2 hours
You will not able to get access to the members page of the nikoli.com during this time. Sorry for the inconvenience.
Result of the 16th nikoli.com Puzzle Championship Sep 28, 2007
Congratulations to maysure! maysure won the 16th puzzle championship! maysure'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 Oct 12, 13:00 (UTC) and the time trial problem is a Kakuro puzzle that was contributed by crimson.
16th Puzzle Championship Sep 28, 2007
nikoli.com holds 16th puzzle championships on our members page on Fri. Sep 28 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Take a break puzzles Sep 27, 2007
Unwind puzzles - puzzles that are easy to do. Do you know how many colors you need when you paint the countries in a world map, and neighboring countries must use a different color? The answer is that you only need four.
Entry to The Nikoli Derby was closed Sep 26, 2007
We will announce the ranking of all participants of The Nikoli Derby on Wed. Oct 3rd.
Added Botsu Bako problem Sep 21, 2007
mimic's extra hard Slitherlink problem is opened to our members. Let's play in the Botsu Bako (Extra Special Problems) page in the members area.
Entry to The Nikoli Derby will soon be closed Sep 20, 2007
The winners will get a nikoli.com original T-shirt or a nikoli puzzle book. Make sure you enter. Deadline Tue. Sep 25, 15:00(UTC)
Result of the 15th nikoli.com Puzzle Championship Sep 14, 2007
Congratulations to maysure! maysure won the 15th puzzle championship! maysure'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 Sep 28, 13:00 (UTC) and the time trial problem is a Slitherlink puzzle that was contributed by OX.
The pick of the puzzles Sep 13, 2007
We have now thought of a way to keep the most popular puzzles in the pick of the puzzles page at the Members only area. Please vote for the greatest puzzle according to you.
15th Puzzle Championship Sep 13, 2007
nikoli.com holds 15th puzzle championships on our members page on Fri. Sep 14 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Maintenance finished Sep 7, 2007
About 25 minutes after 05:00 Sep 7, 2007(UTC).
Due to scheduled maintenance, you could not access to the nikoli.com. Sorry for the inconvenience.
Results of the 1st Minority Decides Game Sep 4, 2007
The Minority Decides is a nikoli original easygoing party game.
Look here for the results of the 1st Minority Decides Game.
Result of the 14th nikoli.com Puzzle Championship Aug 31, 2007
Congratulations to maysure! maysure won the 14th puzzle championship! maysure'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 Sep 14, 13:00 (UTC) and the time trial problem is a Akari puzzle that was contributed by Casty.
Announcement of the maintenance work Aug 31, 2007
from Fri, Sep. 7th 05:00(UTC), about 2 hours
You will not able to get access to the nikoli.com during this time. Sorry for the inconvenience.
The Nikoli Derby - 2nd world championship Aug 28, 2007
The Nikoli Derby was developed by nikoli as a party game. It has very simple rules that make it exciting and easy for all, from kids to much older players.
Let's register from "The 2nd Nikoli Derby World Championship" page!!
Entry to The Minority Decides was closed Aug 28, 2007
We will announce the ranking of the game on Tue. Sep 4th.
Entry deadline of the game is Mon. Aug 27, 15:00(UTC)Aug 23, 2007
Please join nikoli original easygoing party game The Minority Decides. The winner will receive an original Nikoli T-shirt.
Result of the 13th nikoli.com Puzzle Championship Aug 17, 2007
Congratulations to Hugo! Hugo won the 13th puzzle championship! Hugo'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 Aug 31, 13:00 (UTC) and the time trial problem is a Hitori puzzle that was contributed by mimic.
13th Puzzle Championship Aug 16, 2007
nikoli.com holds 13th puzzle championships on our members page on Fri. Aug 17 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
The Minority Decides Aug 1, 2007
This is a nikoli original easygoing party game. To take part you choose "yes" or "no" for the questions at the entry page. The winner will receive an original Nikoli T-shirt.
Result of the 12th nikoli.com Puzzle Championship Aug 3, 2007
Congratulations to jyokun! jyokun won the 12th puzzle championship! jyokun'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 Aug 17, 13:00(UTC) and the time trial problem is a Nurikabe puzzle that was contributed by juno.
12th Puzzle Championship Aug 2, 2007
nikoli.com holds 12th puzzle championships on our members page on Fri. Aug 3 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Result of the 11th nikoli.com Puzzle Championship Jul 20, 2007
Congratulations to tarotaro! tarotaro won the 11th puzzle championship! tarotaro'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 Aug 3, 13:00(UTC) and the time trial problem is a Heyawake puzzle that was contributed by NyanBaz.
11th Puzzle Championship Jul 20, 2007
nikoli.com holds 11th puzzle championships on our members page on Fri. Jul 20 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Shikaku!! Jul 10, 2007
nikoli.com started to release Shikaku puzzles in the members area from Jul 10th(JST).
Result of the 10th nikoli.com Puzzle Championship Jul 6, 2007
Congratulations to gori.sh! gori.sh won the 10th puzzle championship! gori.sh'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 Jul 20, 13:00(UTC) and the time trial problem is a Kakuro puzzle that was contributed by -4.
Shikaku sample problems added Jun 28, 2007
nikoli.com now has 10 sample problems of Shikaku puzzles. The 2 added problems are "Hard". Give them a try. Can you already solve hard Shikaku problems?
nikoli.com will start to release Shikaku puzzles in the members area from Jul 10th.
9th Puzzle Championship Jun 22, 2007
nikoli.com holds 9th puzzle championships on our members page on Fri. Jun 22 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Rules of Shikaku puzzle Jun 19, 2007
Check the "How to play" link for the Shikaku puzzle. That way you will learn know how to operate the puzzle user interface using Flash.
Result of the 9th nikoli.com Puzzle Championship Jun 22, 2007
Congratulations to uri! uri won the 9th puzzle championship! uri'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 Jul 6, 13:00(UTC) and the time trial problem is a Slitherlink puzzle that was contributed by crimson.
Added sample problems of Shikaku Jun 21, 2007
Three sample problems of Shikaku are opened to the public.
8th puzzle of nikoli.com is Shikaku Jun 15, 2007
nikoli.com will start publishing Shikaku puzzles in our members area from July. Try out the sample puzzles of Shikaku to get to know this wonderful puzzle.
Dog pictures for difficulty marks.Jun 12, 2007
Try out the dog icons on the appearance setting page. The pictures are from our members.
Result of the 8th nikoli.com Puzzle Championship Jun 8, 2007
Congratulations to Hammy! Hammy won the 8th puzzle championship! Hammy'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 Jun 22, 13:00(UTC) and the time trial problem is a Akari puzzle that was contributed by mimic.
8th Puzzle Championship Jun 7, 2007
nikoli.com holds 8th puzzle championships on our members page on Fri. Jun 8 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Frequently Asked Question May 23, 2007
We have added contents of the Frequently Asked Question of the nikoli.com.
Result of the 7th nikoli.com Puzzle Championship May 11, 2007
Congratulations to motris! motris won the 7th puzzle championship! motris'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 Jun 8, 13:00(UTC) and the time trial problem is a Hitori puzzle that was contributed by mimic.
7th Puzzle Championship May 24, 2007
nikoli.com holds 7th puzzle championships on our members page on Fri. May 25 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Result of the 6th nikoli.com Puzzle Championship May 11, 2007
Congratulations to aji! aji won the 6th puzzle championship! aji'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 May 25, 13:00(UTC) and the time trial problem is a Sudoku puzzle that was contributed by TAKEI Daisuke.
Update Flash program of Heyawake and Hitori May 14, 2007
Please check the "How to play using Flash" pages of each puzzle.
Results of the Nikoli Derby - 1st world championship May 11, 2007
The Nikoli Derby was developed by nikoli as a party game.
Look here for the results of The Nikoli Derby - 1st world championship.
6th Puzzle Championship May 10, 2007
nikoli.com holds 6th puzzle championships on our members page on Fri. May 11 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Entry to The Nikoli Derby was closed May 1, 2007
We will announce the ranking of all participants of The Nikoli Derby on Fri. May 11th.
5th Puzzle Championship Apr 26, 2007
nikoli.com holds 5th puzzle championships on our members page on Fri. Apr 27 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Announcement of the maintenance work Apr 24, 2007
About 10 minutes after 05:00 Apr 27, 2007(UTC).
You will not able to get access to the nikoli.com during this time. Sorry for the inconvenience.
Result of the 5th nikoli.com Puzzle Championship Apr 27, 2007
Congratulations to moku! moku won the 5th puzzle championship! moku'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 May 11, 13:00(UTC) and the time trial problem is a Nurikabe puzzle that was contributed by aspirin.
nikoli.com original T-shirt Apr 25, 2007
This is the nikoli.com original T-shirt. It is not for sale, you have to win it!
Banners and Links Apr 20, 2007
We have prepared banners that you may use as links to nikoli.com. Please add a link to nikoli.com from your web site or blog.
Result of the 4th nikoli.com Puzzle Championship Apr 13, 2007
Congratulations to uri! uri won the 4th puzzle championship! uri'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 Apr 27, 13:00(UTC) and the time trial problem is a Heyawake puzzle that was contributed by OX.
4th Puzzle Championship Apr 12, 2007
nikoli.com holds 4th puzzle championships on our members page on Fri. Apr 13 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Customize the appearance of the members area Apr 7, 2007
You can customize font size and the appearance of the members pages.
Don't give cow's milk to kittens or adult cats. Apr 1, 2007
Cow milk is not healthy for cats, because they can't digest it and it will cause diarrhea.
nikoli.com highly recommends cat milk, it contains plenty of proteins and nutrition.
Result of the 3rd nikoli.com Puzzle Championship Mar 30, 2007
Congratulations to FUMIKAZU! FUMIKAZU won the 3rd puzzle championship! FUMIKAZU'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 Apr 13, 13:00(UTC) and the time trial problem is a Slitherlink puzzle that was contributed by aspirin.
The Nikoli Derby - 1st world championship Mar 28, 2007
The Nikoli Derby was developed by nikoli as a party game. It has very simple rules that make it exciting and easy for all, from kids to much older players.
Let's register from "The 1st Nikoli Derby World Championship" page!!
Getting around Safari1.x and Flash Player9 problems Mar 27, 2007
If you use Safari1.x with Flash Player9, you will be unable to register the solved puzzle history at the members page of nikoli.com. Please refer the "Getting around Safari1.x and Flash Player9 problems" page.
Announcement of the maintenance work Mar 26, 2007
About 10 minutes after 05:00 Mar 27, 2007(UTC).
You will not able to get access to the nikoli.com during this time. Sorry for the inconvenience.
Maintenance finished Mar 27, 2007
About 5 minutes after 05:00 Mar 27, 2007(UTC).
Due to scheduled maintenance, you could not access to the members pages of nikoli.com. Sorry for the inconvenience.
Result of the 2nd nikoli.com Puzzle Championship Mar 16, 2007
The winner of the 2nd puzzle championship was gori.sh! You are able to try this time trial problem at the Puzzle Championship page. Can you solve OX's great problem?
2nd Puzzle Championship Mar 14, 2007
nikoli.com holds 2nd puzzle championships on our members page on Fri. Mar 16 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Result of the 1st nikoli.com Puzzle Championship Mar 3, 2007
The winner of the 1st puzzle championship was mimic! You are able to try this time trial problem at the Puzzle Championship page. Can you solve TAKEI Daisuke's great problem?
Problem addition service Mar 1, 2007
This service is for new members who want to have more puzzles to solve.
If the number in the "Total" column of your "Collection of problems" table is larger than the number in the "Playable" column you will be able to add new puzzles.
Maintenance finished Feb 27, 2007
About 3 minutes after 06:00 Feb 27, 2007(UTC).
Due to scheduled maintenance, you could not access to the members pages of nikoli.com. Sorry for the inconvenience.
Announcement of the maintenance work Feb 25, 2007
About 10 minutes after 06:00 Jan 27, 2007(UTC).
You will not able to get access to the nikoli.com during this time. Sorry for the inconvenience.
nikoli.com Puzzle Championship Feb 23, 2007
nikoli.com holds puzzle championships on our members page on Fri. Mar 2 at 13:00(UTC). The first correct solution is the winner. Start right away and hurry, race, dash to solve it and submit it immediately!
Server maintenance work finished Feb 14, 2007
Wed, Feb. 14th 05:00 to 15:20(UTC)
Apologies. Due to site maintenance you were not able to access the members page of nikoli.com during the above time.
Emergency server maintenance (update) Feb 13, 2007
from Wed, Feb. 14th 05:00(UTC), about 1 or 2 hours
We are sorry. Because of maintenance work, you will not able to get access to the nikoli.com members pages during that time.
Emergency server maintenanceFeb 10, 2007
Member's server of nikoli.com needs emergency hardware maintenance after a few days.
We will announce detailed maintenance schedule when we knew that. Sorry for the inconvenience.
Added Google Search and Ads Jan 18, 2007
We hope you find them useful.
Announcement of the maintenance work Jan 18, 2007
About 10 minutes after 06:00 Jan 22, 2007(UTC).
You will not able to get access to the nikoli.com during this time. Sorry for the inconvenience.
Update flash program Jan 11, 2007
Now you can change the "this is not black cell" mark of Heyawake and Hitori.
Use the space key when you input memo numbers in Kakuro and Sudoku using the keyboard.
You can check which numbers are possible in Kakuro by clicking the hint button, but only when there is just one combination left and there are 2 to 7 cells in the string.
nikoli.com opened!! Dec 10, 2006
nikoli.com started on Dec 10, 2006(JST). We will publish new puzzles everyday.
How to play puzzles using Flash Dec 6, 2006
Check the "How to play" link for the puzzle you want to play. That way you will learn know how to operate the puzzle user interface using Flash.
Recommended environment of nikoli.com Dec 6, 2006
We have added information about the recommended environment of nikoli.com. Please check this page, if you couldn't do our puzzles.
December 9th 09:00; we will start registration of members! Nov 30, 2006
Yes, as you know, nikoli.com starts December 9, 15:00(UTC) and as we are sure everybody wants to solve puzzles from the very start of nikoli.com, we start registration from December 9, 09:00(UTC). Remember, if you register you will be able to enjoy the site when it opens - December 9, 2006 15:00(UTC).
Register before we start, and you are off to great puzzle solving! We look forward to see you in the members page of nikoli.com.
Members page of nikoli.com coming soon Nov 29, 2006
Members page of nikoli.com will open on December 1st.
We will accept registration of membership from 10th December(JST). Please check the "How to join" page.
Added sample problems Nov 22, 2006
nikoli.com opened 10 sample problems of all 7 kind of puzzles. The difficulty of added 14 problems are "Hard". Can you solve them?
Added sample problems Nov 15, 2006
Numbers of each sample problems become 8. Let's enjoy nikoli.com original puzzles.
Added sample problems Nov 8, 2006
Let's try sample problems of Sudoku.
nikoli.com will public 10 sample problems of each puzzles before start of members page.
Added sample problems Nov 2, 2006
Sample problems of Nurikabe and Hitori are opened to the public.
Added sample problems Oct 27, 2006
Sample problems of Heyawake and Karuro are opened to the public.
Sample problems Oct 27, 2006
Sample problems of Slitherlink and Akari are opened to the public.
nikoli.com Coming Soon!!
This is good news for Nikoli Puzzle lovers!
Nikoli has just started to make up an original web site. This site, you can enjoy new Nikoli puzzles everyday. Chief producer Nob Kanamoto said "We want to offer this site for pencil puzzle lovers all over the world. URL is http://www.nikoli.com. I will do my best to launch it within this year. Please wait for a while."
Please note, December 10th(JST), 2006!! members page of nikoli.com will start.
