Available Heists

Choose your target and crack the code with the fewest characters possible.

Bipartite Graphs

According to [Wikipedia](https://en.wikipedia.org/wiki/Bipartite_graph) a bipartite graph is the following: > In the ma

Code Golf
24 April 2026 7 submissions

Graph Planarity

A graph is *planar* if it's possible to draw onto a plane with no intersecting edges. I explained some context for the

Code Golf
12 weeks, 3 days 8 submissions

Match maker

Given a CSS query, output the unindented html needed that will produce a match. For example, `a.foo>b#bar` should produ

Code Golf
8 weeks, 0 days 18 submissions

Zigzag Bytes

A string zigzags if its bytes go up, then down, then up, then down again, and so on... Note that a zigzag can start wit

Restricted Source
8 weeks, 5 days 6 submissions

Set Equality Counts

It is impossible for sets of certain sizes to have certain total numbers of equalities. For example, a set of 3 items ca

Code Golf
Ended 21 submissions

Parity Sequence

Your code should output the numbers from 1 to 100, inclusive. When only the even-indexed characters of your code are run

Restricted Source
Ended 17 submissions

Domain Name

Write "Hello, World!" to stdout, except your code must be a valid domain name (matches the regex `/^(\w+.)+\w+$/`)

Restricted Source
Ended 24 submissions

Cash in your code

After my latest heist, I needed a place to stash the lucre, so I put it in your program! Your program should output "

Restricted Source
N/A 26 submissions

Missing First

Same as [Missing Last](https://byte-heist.com/challenge/21/missing-last/solve/rust) but first character is removed

Restricted Source
N/A 53 submissions

Cake Cutting

The year is 2035. Cake cutting is the last profession humans have left, everything else has been replaced by AI. Your jo

Code Golf
N/A 9 submissions

Binary Squash

Given a list of integers, each on their own line, combine the ones adjacent ones where the binary representation does no

Code Golf
N/A 30 submissions

Regex Generator

Given two words---the "good" word and the "bad" word---you need to output 5 regexes and 5 extra words as pairs. Each reg

Code Golf
08 February 2026 20 submissions

Equation Solver 3

I need some code to do my homework for me. Each equation can be simplified to a linear one. Print out the value of x sat

Code Golf
N/A 15 submissions

Magic Squares

Print 100 magic squares. A magic square is a square where each row, column, and diagonal must sum to the same value.

Code Golf
N/A 14 submissions

Cave Man Speak

A Cave man word is a word that is at most four letters and alternates vowels and consonants. Y is a vowel if and only on

Code Golf
N/A 18 submissions

American Soundex

For each line of the input, print it's [American Soundex](https://en.wikipedia.org/wiki/Soundex). Soundex is an algorith

Code Golf
N/A 15 submissions

Square pandigital numbers

Print every 10-digit square number that contains every digit from 0-9 exactly once, separated by newlines, in any order.

Code Golf
N/A 33 submissions

Highly factorable number

You must print any number `n` with `n > 0` you like to stdout. Your code must be at least `count(n%k for k in 1..100)` b

Restricted Source
N/A 52 submissions

Addition of numbers

You are given two numbers and you are to add them together and print the result. Add them up, put them into a blender an

Code Golf
N/A 63 submissions

NestedText Serializer

Given a [JSON document](https://www.json.org) convert it to a [NestedText document](https://nestedtext.org). To be prec

Code Golf
N/A 8 submissions

Unspelling numbers

For each spelled out numbers 0-1000 in the input (inclusive), print its numeric value. For example, for the input `'t

Code Golf
N/A 11 submissions

Missing Last

Your program should print 'not missing'. If the last character is removed, it should print 'missing'. Tests are run mult

Restricted Source
Ended 52 submissions

Print a pangram

A **pangram** is a sentence that contains every letter of the alphabet from a-z at least once. For example, this is a pa

Code Golf
N/A 82 submissions

Diagonal Symmetry Quine

Write a code that is a square symmetrical along the main diagonal and which prints the diagonal. The output is whitespa

Restricted Source
N/A 27 submissions

Vigenère Cipher Cryptanalysis

Recover a message encrypted using a [Vigenère cipher](https://en.wikipedia.org/wiki/Vigen%C3%A8re_cipher). The messag

Code Golf
N/A 8 submissions

Hello Caesar!

You are tasked with sending a secret message to Caesar. The way Caesar encodes message is using a Caesar cipher with a s

Restricted Source
N/A 12 submissions

The Name Game

The best hole. Print the lyrics to the song **The Name Game** Try lyrics are as follows: ``` The name game! Shirley!

Code Golf
N/A 29 submissions

Binary Complement Reverse Sequence

The BCR sequence consists of numbers where, if you take the binary complement and reverse it, you get back the original

Code Golf
23 April 2026 34 submissions

Equation Solver

Given a subset of ``` x = 1.2 3*x+2*(1-x+(2*x)*0.5)-4=x+7 (1 - (1 - (1 - x*2))) = 9999.9 1 * 2 * 3 * 4 * x=195 (

Code Golf
N/A 17 submissions

Hello, Parity!

Print "Hello, World!". Bytes of the solution must alternate from even to odd, starting with even. That is, `ord(s[0])

Restricted Source
N/A 23 submissions

No digits

Print "1234567890" without using any digits in the source code. **bold** *italic*

Restricted Source
N/A 64 submissions

Double Integers

For each line in the input, print its double.<script>alert(5)</script>

Code Golf
N/A 78 submissions

Just print

Print over 69 characters to both stdout and stderr

Code Golf
N/A 93 submissions

Double Output

Print the input twice, without anything in between, no matter how it looks.

Code Golf
N/A 71 submissions

Double quine

Write a program A which when run emits to STDOUT a program B in the same language. Program B when run should then emit t

Restricted Source
N/A 28 submissions

rot13

Given an ASCII string, apply rot13 to its letters

Code Golf
N/A 36 submissions

Byte XOR

BETA

Create shortest possible program that calculates the XOR of bytes read from STDIN (newline not included). The XOR of the

Restricted Source
N/A 11 submissions

Brainfuck Printer

BETA

For each input string of printable ASCII (0x20-0x7e), output a brainfuck program which produces that string. At the end

Code Golf
N/A 5 submissions

Text Compression V2

BETA

For this challenge, you will write a program which can compress text, and also decompress its own compression scheme.

Restricted Source
N/A 10 submissions

Text Compression

BETA

For this challenge, you will write two programs: one which compresses text, and the other which decompresses it. The

Code Golf
N/A 9 submissions

Sorta Sorted Strings

BETA

For each line in the input, output its Sorta Sorted Score. The Sorta Sorted Score of a string is the sum of the costs

Restricted Source
N/A 8 submissions

Broken shift key

BETA

Oh no! I have a coding interview and my keyboard's shift key is stuck down! The characters I can use are `[a-zA-Z~!@#$%^

Restricted Source
N/A 11 submissions

The Great Escape

BETA

Print 'jailbreak' in Python, except all your builtins are missing.

Restricted Source
N/A 9 submissions

ET phone home

BETA

Print the string 'ET' without E or T in the source. Additionally, your code must be printable ascii.

Restricted Source
N/A 33 submissions

Radiation Resistant Integers

BETA

For each integer from 1 to 100, put on a single line (in the source) a radiation-safe expression which evaluates to that

Restricted Source
Ended 8 submissions

Radiation Resistant Integers Generator

BETA

For each integer from 1 to 100, output on a single line a radiation-safe expression (in the same language as your soluti

Code Golf
Ended 9 submissions

Impossible?

BETA

This will always fail... or will it?

Restricted Source
N/A 5 submissions

Hello, Radiation!

BETA

Your code must print "Hello, World!", even if any single char is removed.

Restricted Source
N/A 14 submissions

Equation Solver 2

BETA

I need some code to do my homework for me. Each equation can be simplified to a linear one. The answers are all exact de

Restricted Source
N/A 9 submissions