• Blog

Crazy August

Results of relaxing July, new missions and how crazy August will look like.
1st August 2017 12:58
by oduvan

New Interval Missions

Two new Interval Missions, two new missions with Editors' Choice Solutions and our research about hardest missions on CheckiO.
27th July 2017 08:44
by oduvan

Collaboration is the key

Completely Empty, Cut Sentence, What can you do with solutions and StefanPochmann in one short blog-post
18th July 2017 12:07
by oduvan

Results of the first week

Reverse Roman Numerals is no longer in random review mode, one more mission had been released last week and our top3 leaders you can find in this blog post about the first week of relax-July.
11th July 2017 12:41
by oduvan

Relax and have some fun on July

This month we will release a lot of small and short missions, so you can check how creative can be CheckiO community with Python.
4th July 2017 13:20
by oduvan

What can you do with solutions

Hi guys We no longer support Python 2.7, and we have begun working on speed optimization. One of the biggest updates was released just recently, which allow pages related to user solutions to work much faster. Since we mentioned solutions let’s go through all the related features.
27th June 2017 20:37
by oduvan

Last Week Tonight

A new CheckiO mission based on HBO's show Last Week Tonight with John Oliver finally released.
30th May 2017 09:48
by oduvan

Python 3 Only

All solutions have finally been migrated to Python 3. All SendGrid mission are in Normal Mode, so you can see solutions LeaderBoard.
18th May 2017 07:13
by oduvan

New Unique CheckiO Island

Hey! A brand new Island has been released on CheckiO! It’s called SendGrid Island! There are several unique things with this island you’ll want to check out...
27th April 2017 07:04
by oduvan

Interview with Dahlia

I am very excited to share an interview with one of CheckiO'snosy active users. Dahlia, is helping other users on the forum, creating new missions, and providing German translation for our current missions. It was a very positive and informative conversation.
4th April 2017 08:53
by oduvan

Video Code Review with Veky: contextlib and ast

Together with veky we do our next video code review for solutions that use contextlib and ast
16th March 2017 08:32
by oduvan


CheckiO has a lot of features that become available, or unlocked, with higher levels. Here is a list of all the potential features and at which levels they become available to users.
9th March 2017 15:08
by oduvan

Job Board

We are now ready to present the first version of CheckiO Job Board! It has been released for testing in four countries: USA, Russia, Ukraine and UK, and will be available for level 4 users.
7th March 2017 09:26
by oduvan

Interview with kurosawa4434

Last week we shared a new mission from kurosawa4434 called "Climbing Route". This is actually his third mission we thought it would be great to do a short interview with him.
28th February 2017 11:16
by oduvan

Forum Tags

An improvements to make the forum not only a place where you can get help with solving missions but also a place where you can learn something new and meet other people who share your love for coding
21st February 2017 11:27
by oduvan

CheckiO Public Blog

If some of you would like to contribute an article to CheckiO - please contact with me directly. I would be more than happy to take submissions that are beneficial to fellow users, players and coders – in regards to Python and JavaScript.
2nd February 2017 14:34
by oduvan

Itertools. Part2

our next article around itertools on CheckiO
2nd February 2017 14:23
by oduvan

Python Bruteforces

5,000 solutions, or about 2% of total, are using itertools. Let me show you how.
31st January 2017 09:57
by oduvan

You can create missions again

Video tutorial of creating mission, short article from video code review and some other python news
28th January 2017 01:35

Things I learned from Video Code Review with veky

Since the last year, one of our Awesome Users veky has been doing video code review on CheckiO. Here is a very short highlight of the most interesting and educational code:
24th January 2017 11:09
1 2 3
5 6 7 8