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
Sierpiński Triangle
alphafalfa
95
3 hours ago
Rule 110
alphafalfa
183
4 hours ago
Roman to Arabic
alphafalfa
131
4 hours ago
Rijndael S-box
alphafalfa
572
4 hours ago
Pernicious Numbers
alphafalfa
92
5 hours ago
Pernicious Numbers (Long)
alphafalfa
92
5 hours ago
ISBN
alphafalfa
120
6 hours ago
Foo Fizz Buzz Bar
alphafalfa
92
6 hours ago
Billiards
alphafalfa
250
6 hours ago
Arabic to Roman
alphafalfa
166
6 hours ago
99 Bottles of Beer
alphafalfa
280
7 hours ago
Topological Sort
albanian-laundromat
🦄
122
43 hours ago
π
Ralac07
1,018
4 days ago
Pangram Grep
albanian-laundromat
97
5 days ago
ASCII Table
albanian-laundromat
125
5 days ago
Zeckendorf Representation
albanian-laundromat
79
5 days ago
Van Eck Sequence
albanian-laundromat
61
5 days ago
Day of Week
albanian-laundromat
73
5 days ago
Inventory Sequence
albanian-laundromat
67
6 days ago
Zodiac Signs
sean-niemann
💎
94
7 days ago
Minesweeper
albanian-laundromat
209
7 days ago
λ
gigaprofisi
1,018
9 days ago
Abundant Numbers (Long)
albanian-laundromat
69
10 days ago
Abundant Numbers
albanian-laundromat
69
10 days ago
Kaprekar Numbers
albanian-laundromat
141
10 days ago
Fizz Buzz
albanian-laundromat
67
10 days ago
Pernicious Numbers
edsrzf
42
10 days ago
Fizz Buzz
not-a-pokemon
67
11 days ago
Mandelbrot
DialFrost
🥈
113
12 days ago
Niven Numbers
fuzzylojik-golf
43
13 days ago
Niven Numbers (Long)
fuzzylojik-golf
49
13 days ago
τ
RaBa21
1,018
13 days ago
Ten-pin Bowling
edsrzf
💎
157
13 days ago
Kolakoski Sequence
dokutan
59
14 days ago
QR Decoder
sean-niemann
💎
131
15 days ago
Foo Fizz Buzz Bar
dokutan
90
16 days ago
Fizz Buzz
dokutan
62
17 days ago
Tutorial
fuzzylojik-golf
53
17 days ago
Pascal’s Triangle
dokutan
67
18 days ago
π
RaBa21
1,018
19 days ago
Catalan’s Constant
albanian-laundromat
🥈
308
19 days ago
Arabic to Roman
albanian-laundromat
181
19 days ago
Leap Years
albanian-laundromat
53
19 days ago
Tutorial
Bpc-CPU
439
20 days ago
Spelling Numbers
albanian-laundromat
371
20 days ago
Emirp Numbers
albanian-laundromat
107
21 days ago
Seven Segment
albanian-laundromat
🥉
164
21 days ago
Prime Numbers
albanian-laundromat
45
21 days ago
𝑒
albanian-laundromat
243
21 days ago
Fibonacci
albanian-laundromat
47
21 days ago
Odious Numbers
albanian-laundromat
72
21 days ago
24 Game
rucin93
💎
273
22 days ago
Quine
RYSF13
56
22 days ago
PalindromemordnilaP
xsot
💎
66
22 days ago
Transpose Sentence
albanian-laundromat
76
23 days ago
Mandelbrot
MeWhenI
126
24 days ago
Mandelbrot
fuzzylojik-golf
10,055
24 days ago
ln 2
fuzzylojik-golf
1,014
24 days ago
Rijndael S-box
fuzzylojik-golf
794
24 days ago
Kolakoski Constant
fuzzylojik-golf
1,014
24 days ago
Catalan’s Constant
fuzzylojik-golf
1,014
24 days ago
Mandelbrot
KatieLG
580
25 days ago
π
albanian-laundromat
280
27 days ago
99 Bottles of Beer
albanian-laundromat
241
27 days ago
Collatz
albanian-laundromat
69
27 days ago
Mandelbrot
xsot
128
27 days ago
ROT13
DialFrost
🥉
92
27 days ago
Trinomial Triangle
albanian-laundromat
106
27 days ago
Recamán
albanian-laundromat
65
4 Jul 2025
Pangram Grep
heanyang1
109
4 Jul 2025
Catalan Numbers
albanian-laundromat
🥉
294
4 Jul 2025
Prime Numbers
fuzzylojik-golf
42
3 Jul 2025
Arabic to Roman
dokutan
329
2 Jul 2025
Morse Encoder
dokutan
🥉
713
2 Jul 2025
Tutorial
dokutan
43
2 Jul 2025