Available Heists

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

200 days of Wordle

Print any 200 five-letter words that are valid Wordle guesses, as listed [here](https://gist.github.com/dracos/dd0668f28

Code Golf Medium
07 July 2026 17 submissions

Broken shift key

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 Medium
Ended 31 submissions

Bipartite Graphs

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

Code Golf Medium
in 11 weeks, 6 days 10 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 Medium
Ended 10 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 🔥 Hard
Ended 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 produc

Code Golf Medium
Ended 23 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 Medium
Ended 25 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 Medium
Ended 20 submissions

Domain Name

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

Restricted Source Medium
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 Medium
N/A 27 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 Cake cutting is the last profession humans have left, everything else has been replaced by AI.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 Medium
N/A 9 submissions

Missing First

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

Restricted Source Medium
N/A 55 submissions

Binary Squash

Given a list of integers, each on their own line, combine the adjacent numbers where their binary representations do not

Code Golf Medium
N/A 32 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 Medium
in 1 weeks, 1 days 22 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 Medium
13 June 2026 16 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 Medium
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 Medium
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 Medium
N/A 18 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 Medium
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 Medium
N/A 58 submissions

Addition of numbers

For each line of input, given two integers in the range [0, 100) in decimal separated by a tab character, output their s

Code Golf Medium
N/A 66 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 🔥 Hard
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 Medium
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 Medium
Ended 55 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 🧊 Easy
N/A 86 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 Medium
N/A 28 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 Medium
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 Medium
N/A 13 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 🧊 Easy
N/A 31 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 Medium
in 11 weeks, 6 days 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 Medium
N/A 18 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 Medium
N/A 28 submissions

No digits

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

Restricted Source Medium
N/A 68 submissions

rot13

Given an ASCII string, apply rot13 to its letters

Code Golf 🧊 Easy
N/A 37 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 Medium
N/A 28 submissions

Double Integers

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

Code Golf 🧊 Easy
N/A 84 submissions

Just print

Print over 69 characters to both stdout and stderr

Code Golf 🧊 Easy
N/A 98 submissions

Double Output

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

Code Golf 🧊 Easy
N/A 77 submissions

Maze Generator

BETA

Output 200 unique 8x8 mazes. Use # characters to mark the walls. There must be exactly one route between every two cell

Code Golf Medium
N/A 6 👍 / 0 👎

Cockroach Salad

BETA

Cockroach Salad is a card game designed by Jacques Zeimet in 2007. The rules are as follows: - When you play a card, if

Code Golf Medium
N/A 3 👍 / 0 👎

Triangle Quine

BETA

Write a program that prints out a triangle of `*` characters of size n, for some number n. This is a triangle of size 3:

Restricted Source Medium
N/A 3 👍 / 0 👎

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 Medium
N/A 3 👍 / 0 👎

Sorted Groups

BETA

Given a string, divide it into substrings so each substring is sorted (either in ascending or descending order), then ou

Code Challenge Medium
N/A 2 👍 / 0 👎

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 Medium
N/A 2 👍 / 0 👎

Impossible?

BETA

This challenge is impossible under ordinary circumstances, but sometimes bugs in the solution sand-boxing allow it to be

Restricted Source 🔥 Hard
N/A 2 👍 / 0 👎

Brainfuck Printer

BETA

For each line of input of printable ASCII (0x20-0x7e), output a brainfuck program which produces that string. Your score

Code Challenge Medium
N/A 2 👍 / 1 👎

Text Compression

BETA

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

Code Golf Medium
N/A 2 👍 / 1 👎

ET phone home

BETA

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

Restricted Source Medium
N/A 1 👍 / 0 👎

String Hashing

BETA

Given a list of strings, one on each line, output a positive 31-bit integer for each one. Each word in [words.txt](https

Code Golf Medium
N/A 1 👍 / 2 👎

Sink or Swim

BETA

You will be given a list of lines that look like this: ``` ### < > ### <<>>< ## ``` The characters mean the follow

Code Golf Medium
N/A 0 👍 / 0 👎

Omniperiodicity

BETA

In 2023 it was proven that the [Game of life is omniperiodic](https://arxiv.org/abs/2312.02799), meaning that there exis

Restricted Source Medium
N/A 0 👍 / 0 👎

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 Medium
N/A 0 👍 / 0 👎

The Great Escape

BETA

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

Restricted Source Medium
N/A 0 👍 / 0 👎

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 🔥 Hard
Ended 0 👍 / 0 👎

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 🔥 Hard
Ended 0 👍 / 0 👎

Hello, Radiation!

BETA

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

Restricted Source Medium
N/A 0 👍 / 0 👎

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 Medium
N/A 0 👍 / 0 👎