About

Do I Need to Login to Play?
No. Submitted solutions will be executed and checked without logging in, but nothing will be saved and you won't appear on the leaderboards.
Is the Project Open Source?
Yes. It is written in Go and available on GitHub; patches welcome!
What Languages Are Supported?
If you'd like to see another language added then raise an issue.
Language Version Website
Bash5.0.0website
Brainfuck1.0.0website
CTiny C Compiler 0.9.27website
HaskellGlasgow Haskell Compiler 8.4.3website
J8.07.07website
JavaScriptV8 7.4.51website
Julia1.3.0website
LispGNU CLISP 2.49.92website
Lua5.3.5website
Nim1.0.4website
Perl5.30.1website
Perl 6Rakudo 2019.07.1 on MoarVM 2019.07.1 implementing Perl 6.dwebsite
PHP7.4.0website
Python3.8.0website
Ruby2.6.5website
Are Warnings Ignored?
Yes. Only STDOUT is checked against the solution, STDERR is however shown back to you to ease debugging.
How Are Arguments Passed to My Program?
Some holes pass arguments, for those your program should read them from ARGV.
How Are Solutions Scored?
The score of your solution is the count of the Unicode characters in your source code. This means both “A” (U+0041 Latin Capital Letter A) and “😉” (U+1F609 Winking Face) cost the same despite the 1:4 ratio in byte count in UTF-8.
How Is My Overall Score Computed?
For each hole, the shortest solution is awarded 1,000 points, with the points descreasing in uniform decrements per rank. Your overall score is simply the sum of your points in each hole.
Are Submissions Resource Constrained?
Yes. Execution time is limited to 5 seconds, CPU & RAM usage is unbounded but this will probably change soon.
Can I See Other People's Solutions?
Currently no, but a feature is in development to allow you to see any solution that you already beaten in score.