Recent Solutions
Golfers
Solutions
All Holes
12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
Abundant Numbers (Long)
Arabic to Roman
Arithmetic Numbers
Arrows
Ascending Primes
ASCII Table
Billiards
brainfuck
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
CSS Colors
Cubes
Day of Week
DFA Simulator
Diamonds
Divisors
Emirp Numbers
Emirp Numbers (Long)
Emojify
Evil Numbers
Evil Numbers (Long)
Factorial Factorisation
Farey Sequence
Fibonacci
Fizz Buzz
Foo Fizz Buzz Bar
Forsyth–Edwards Notation
Fractions
Game of Life
Gijswijt’s Sequence
Happy Numbers
Happy Numbers (Long)
Hexdump
Intersection
Inventory Sequence
ISBN
Jacobi Symbol
Kaprekar Numbers
Kolakoski Constant
Kolakoski Sequence
Leap Years
Levenshtein Distance
Leyland Numbers
ln 2
Look and Say
Lucky Numbers
Lucky Tickets
Mahjong
Mandelbrot
Maze
Medal Tally
Morse Decoder
Morse Encoder
Musical Chords
N Queens
Niven Numbers
Niven Numbers (Long)
Number Spiral
Odious Numbers
Odious Numbers (Long)
Ordinal Numbers
PalindromemordnilaP
Pangram Grep
Partition Numbers
Pascal’s Triangle
Pernicious Numbers
Pernicious Numbers (Long)
Poker
Polyominoes
Prime Numbers
Prime Numbers (Long)
Proximity Grid
QR Decoder
Quine
Recamán
Repeating Decimals
Reverse Polish Notation
Reversi
Rijndael S-box
Rock-paper-scissors-Spock-lizard
Roman to Arabic
ROT13
Rule 110
Scrambled Sort
Set
Seven Segment
SI Units
Sierpiński Triangle
Smith Numbers
Spelling Numbers
Star Wars GPT
Star Wars Opening Crawl
Sudoku
Sudoku (Fill-in)
Ten-pin Bowling
Tic-tac-toe
Time Distance
Tongue-twisters
Topological Sort
Transpose Sentence
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Apéry’s Constant
Calendar
Connect Four
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
Hilbert Curve
Minesweeper
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Snake
Sphenic Numbers
Trinomial Triangle
Turtle
Tutorial
All Languages
><>
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Common Lisp
Crystal
D
Dart
Elixir
F#
Factor
Forth
Fortran
Gleam
Go
GolfScript
Haskell
Hexagony
J
Janet
Java
JavaScript
jq
Julia
K
Kotlin
Lua
Nim
OCaml
Pascal
Perl
PHP
PowerShell
Prolog
Python
R
Raku
Rockstar
Ruby
Rust
Scheme
sed
SQL
Swift
Tcl
TeX
V
VimL
Wren
Zig
05AB1E
ALGOL 68
APL
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Erlang
Fennel
Groovy
Harbour
Hare
Haxe
Hush
Hy
iogii
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
Umka
Vala
Vyxal
Bytes
Chars
Scoring
Bytes
Chars
Language
All
><>
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Common Lisp
Crystal
D
Dart
Elixir
F#
Factor
Forth
Fortran
Gleam
Go
GolfScript
Haskell
Hexagony
J
Janet
Java
JavaScript
jq
Julia
K
Kotlin
Lua
Nim
OCaml
Pascal
Perl
PHP
PowerShell
Prolog
Python
R
Raku
Rockstar
Ruby
Rust
Scheme
sed
SQL
Swift
Tcl
TeX
V
VimL
Wren
Zig
Experimental Language
05AB1E
ALGOL 68
APL
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Erlang
Fennel
Groovy
Harbour
Hare
Haxe
Hush
Hy
iogii
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
Umka
Vala
Vyxal
Hole
All
12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
Abundant Numbers (Long)
Arabic to Roman
Arithmetic Numbers
Arrows
Ascending Primes
ASCII Table
Billiards
brainfuck
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
CSS Colors
Cubes
Day of Week
DFA Simulator
Diamonds
Divisors
Emirp Numbers
Emirp Numbers (Long)
Emojify
Evil Numbers
Evil Numbers (Long)
Factorial Factorisation
Farey Sequence
Fibonacci
Fizz Buzz
Foo Fizz Buzz Bar
Forsyth–Edwards Notation
Fractions
Game of Life
Gijswijt’s Sequence
Happy Numbers
Happy Numbers (Long)
Hexdump
Intersection
Inventory Sequence
ISBN
Jacobi Symbol
Kaprekar Numbers
Kolakoski Constant
Kolakoski Sequence
Leap Years
Levenshtein Distance
Leyland Numbers
ln 2
Look and Say
Lucky Numbers
Lucky Tickets
Mahjong
Mandelbrot
Maze
Medal Tally
Morse Decoder
Morse Encoder
Musical Chords
N Queens
Niven Numbers
Niven Numbers (Long)
Number Spiral
Odious Numbers
Odious Numbers (Long)
Ordinal Numbers
PalindromemordnilaP
Pangram Grep
Partition Numbers
Pascal’s Triangle
Pernicious Numbers
Pernicious Numbers (Long)
Poker
Polyominoes
Prime Numbers
Prime Numbers (Long)
Proximity Grid
QR Decoder
Quine
Recamán
Repeating Decimals
Reverse Polish Notation
Reversi
Rijndael S-box
Rock-paper-scissors-Spock-lizard
Roman to Arabic
ROT13
Rule 110
Scrambled Sort
Set
Seven Segment
SI Units
Sierpiński Triangle
Smith Numbers
Spelling Numbers
Star Wars GPT
Star Wars Opening Crawl
Sudoku
Sudoku (Fill-in)
Ten-pin Bowling
Tic-tac-toe
Time Distance
Tongue-twisters
Topological Sort
Transpose Sentence
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Experimental Hole
Apéry’s Constant
Calendar
Connect Four
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
Hilbert Curve
Minesweeper
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Snake
Sphenic Numbers
Trinomial Triangle
Turtle
Tutorial
Hole
Golfer
Bytes
Submitted
Sphenic Numbers
HumanoidCPU
8,860
3 days ago
π
Ralac07
1,004
4 days ago
Semiprime Numbers
HumanoidCPU
12,789
4 days ago
Cubes
plcc0
110
6 days ago
Emirp Numbers
plcc0
22
7 days ago
Seven Segment
plcc0
50
7 days ago
Topological Sort
saito-ta
16
19 days ago
Topological Sort
2bular
16
19 days ago
Tutorial
Bpc-CPU
68
20 days ago
99 Bottles of Beer
plcc0
157
23 days ago
Pernicious Numbers (Long)
plcc0
15
23 days ago
Pernicious Numbers
plcc0
10
23 days ago
Odious Numbers (Long)
plcc0
9
23 days ago
Odious Numbers
plcc0
9
23 days ago
Evil Numbers (Long)
plcc0
11
23 days ago
Evil Numbers
plcc0
10
23 days ago
Star Wars GPT
plcc0
19
23 days ago
Pernicious Numbers
saito-ta
10
23 days ago
Pernicious Numbers (Long)
Natanaelel
13
24 days ago
Odious Numbers
ovs-code
9
24 days ago
Odious Numbers (Long)
ovs-code
9
24 days ago
Evil Numbers (Long)
ovs-code
10
24 days ago
Evil Numbers
ovs-code
9
24 days ago
Pernicious Numbers
ovs-code
10
24 days ago
Pernicious Numbers (Long)
ovs-code
13
24 days ago
Pernicious Numbers
Natanaelel
10
24 days ago
Evil Numbers
Natanaelel
9
24 days ago
Odious Numbers
Natanaelel
9
24 days ago
Odious Numbers (Long)
Natanaelel
9
24 days ago
Evil Numbers (Long)
Natanaelel
10
24 days ago
Odious Numbers (Long)
2bular
9
24 days ago
Odious Numbers
2bular
9
24 days ago
Evil Numbers (Long)
2bular
10
24 days ago
Evil Numbers
2bular
9
24 days ago
Pernicious Numbers (Long)
2bular
15
24 days ago
Pernicious Numbers
2bular
10
24 days ago
Set
saito-ta
22
24 days ago
Seven Segment
darrenks
34
25 days ago
Set
darrenks
25
25 days ago
Game of Life
darrenks
26
27 days ago
Rijndael S-box
darrenks
54
27 days ago
Star Wars GPT
darrenks
18
27 days ago
Star Wars GPT
Natanaelel
23
27 days ago
Seven Segment
Natanaelel
45
27 days ago
Gray Code Decoder
Natanaelel
7
27 days ago
Game of Life
Natanaelel
32
27 days ago
Kolakoski Constant
2bular
31
27 days ago
Minesweeper
2bular
21
27 days ago
Game of Life
2bular
25
27 days ago
Star Wars GPT
2bular
18
27 days ago
Gray Code Decoder
2bular
7
27 days ago
Fibonacci
HumanoidCPU
134
30 Jun 2025
Mandelbrot
HumanoidCPU
10,004
30 Jun 2025
12 Days of Christmas
plcc0
378
28 Jun 2025
Number Spiral
HumanoidCPU
300
27 Jun 2025
Collatz
HumanoidCPU
3,226
20 Jun 2025
Tutorial
gigaprofisi
20
17 Jun 2025
Ascending Primes
HumanoidCPU
512
13 Jun 2025
Scrambled Sort
saito-ta
8
7 Jun 2025
Christmas Trees
HumanoidCPU
545
5 Jun 2025
Pernicious Numbers
HumanoidCPU
100
5 Jun 2025
Leap Years
HumanoidCPU
730
5 Jun 2025
Catalan’s Constant
HumanoidCPU
1,003
5 Jun 2025
Kolakoski Constant
HumanoidCPU
1,003
5 Jun 2025
λ
HumanoidCPU
1,003
5 Jun 2025
τ
HumanoidCPU
1,003
5 Jun 2025
π
HumanoidCPU
1,003
5 Jun 2025
φ
HumanoidCPU
1,003
5 Jun 2025
γ
HumanoidCPU
1,003
5 Jun 2025
ln 2
HumanoidCPU
1,003
5 Jun 2025
𝑒
HumanoidCPU
1,003
5 Jun 2025
√2
HumanoidCPU
1,004
5 Jun 2025
Abundant Numbers (Long)
saito-ta
11
4 Jun 2025
Polygon Triangulations
Shanethegamer
4,312
3 Jun 2025
99 Bottles of Beer
HumanoidCPU
11,885
3 Jun 2025