The Nikoli Derby - 11th world championship

Entry to The Nikoli Derby was closed

We will announce the ranking of all participants on Wed. Jul 18th.

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. The number of players can be from 10 to 5,000,000,000 so The Nikoli Derby is enjoyable at any party. nikoli holds this derby with readers and customers at any chance we get.

Please study which gates became winners in the result table of the 10th world championship. That table shows how many horses entered in each of the gates. In that race (the 10th world championship) we accepted Japanese horses like now in the 11th world championship. The number of gates in the 10th world championship is also the same as in this 11th world championship. Study the results of the past races and the past results will help you know where to enter your horse.

Please register from the entry form at the bottom of this page.

What you need to do

You are the owner of a racehorse, and there are two things you need to do to take part in the derby.

  1. Enter the name of your horse.

    Please think of a good name for your horse, between 2 and 24 letters.

  2. Choose a starting gate number.

    Pick your favorite number, from 1 to 300, as your starting gate.

That's all. But note: you can only enter one horse! Please read the "Note" below.

How the winners are ranked

The gate number is the key to winning the Nikoli Derby. The smallest gate number chosen by only one person is the winner. If two or more persons choose the same gate number they will lose the race. This means that you have to choose the smallest number that nobody else has chosen to win the race. What is the smallest number from 1 to 300?

Right, of course gate number 1 has the greatest advantage, but other horse owners know that too. If say, two or more horses are entered for each of gates 1 to 50, then the horse starting from gate 51 will win. Now, you have to guess the "smaller number" of those where you will be the only starting horse. The final ranking is ordered from smaller to larger numbers.

Entry deadline

Tue. Jul 10, 3:00(UTC)

Result announcement

Wed. Jul 18

We will announce the ranking of all participants, by horse name and owner name. We will also announce the countries where the prizewinners come from and some of the comments we receive.


Duplicated entries from the same email or IP address are invalid. Only the last entry from one address will be considered the valid entry for that person.


Champion original T-shirt

2nd to 3rd place

Nikoli Drawstring Purse (Yellow)

4th to 6th place

Nikoli original card game: Camissimo

7th to 10th place

Nikoli Note

Booby prize

Nikoli Furoshiki - Japanese wrapping cloth

Booby prize will be given to the horse finishing next to last. This means the booby horse has one horse at the back which runs whole distance. original T-shirtNikoli Drawstring Purse (Yellow)Nikoli original game CamissimoNikoli NoteNikoli original furoshiki designed by Maki Kaji, godfather of Sudoku

Entry form

Acceptable letters and characters:

ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz 0123456789@.+-_

Gate number Required

Please input a number between 1 and 300.

Horse name Required

Please make the horse name between 2 and 24 letters/characters long.

Horse owners nickname Required

Please make your owner nickname 2 to 24 characters long.

Your country Required

Please input the name of your country, 2 to 60 characters.

Email address Required
Do you want notification of the race result?
Message would like to know how you think of Shakashaka puzzle. Of course, we welcome any messages.

Maximum length, 500 characters.

Complete all the items in the form above and click the Entry button. We will confirm your entry in an email message