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
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
Set
Seven Segment
SI Units
Sierpiński Triangle
Smith Numbers
Spelling Numbers
Star Wars Opening Crawl
Sudoku
Sudoku (Fill-in)
Ten-pin Bowling
Tic-tac-toe
Time Distance
Tongue-twisters
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 Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
Hilbert Curve
Mandelbrot
Minesweeper
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
QR Encoder
Quadratic Formula
Scrambled Alphabetization
Semiprime Numbers
Snake
Sphenic Numbers
Star Wars GPT
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
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
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
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
Set
Seven Segment
SI Units
Sierpiński Triangle
Smith Numbers
Spelling Numbers
Star Wars Opening Crawl
Sudoku
Sudoku (Fill-in)
Ten-pin Bowling
Tic-tac-toe
Time Distance
Tongue-twisters
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 Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
Hilbert Curve
Mandelbrot
Minesweeper
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
QR Encoder
Quadratic Formula
Scrambled Alphabetization
Semiprime Numbers
Snake
Sphenic Numbers
Star Wars GPT
Trinomial Triangle
Turtle
Tutorial
Hole
Golfer
Bytes
Submitted
ROT13
moldIsLuck
124
74 mins ago
Leap Years
kTheLemon
71
2 hours ago
Collatz
jipsong
73
2 hours ago
Highly Composite Numbers
Blendi-Goose
400
6 hours ago
Look and Say
kTheLemon
1,287
10 hours ago
ln 2
kTheLemon
1,009
10 hours ago
Trinomial Triangle
kTheLemon
2,075
10 hours ago
Semiprime Numbers
kTheLemon
12,797
10 hours ago
Mandelbrot
kTheLemon
10,012
10 hours ago
Hilbert Curve
kTheLemon
5,126
10 hours ago
Highly Composite Numbers
kTheLemon
400
10 hours ago
Hexagonal Spiral
kTheLemon
1,143
10 hours ago
Tutorial
kTheLemon
73
10 hours ago
Happy Numbers (Long)
kTheLemon
100
2 days ago
Happy Numbers
kTheLemon
100
2 days ago
Quine
kTheLemon
61
2 days ago
Quine
Blendi-Goose
61
2 days ago
Arithmetic Numbers
kTheLemon
107
2 days ago
Tongue-twisters
kTheLemon
531
2 days ago
Tongue-twisters
Blendi-Goose
531
2 days ago
Pascal’s Triangle
kTheLemon
147
2 days ago
Set
edsrzf
🦄
202
3 days ago
Tutorial
retrohun
144
3 days ago
Leap Years
jipsong
52
3 days ago
Fractions
FlyingPenguin223
95
3 days ago
Billiards
FlyingPenguin223
💎
183
3 days ago
Tongue-twisters
Sciman101
572
6 days ago
Recamán
dokutan
130
6 days ago
Roman to Arabic
dokutan
142
6 days ago
γ
frosster
738
6 days ago
Fibonacci
plcc0
44
7 days ago
Diamonds
frosster
126
8 days ago
φ
sean-niemann
🥉
114
8 days ago
Tutorial
Sciman101
70
8 days ago
Fractions
Sciman101
179
8 days ago
ASCII Table
Sciman101
188
8 days ago
Reverse Polish Notation
Beariish
158
8 days ago
Reverse Polish Notation
Sciman101
192
8 days ago
ROT13
Sciman101
130
8 days ago
Transpose Sentence
DialFrost
105
8 days ago
Floyd-Steinberg Dithering
Antibrain0
445
8 days ago
Quine
not-a-pokemon
🥇
45
8 days ago
Reverse Polish Notation
frosster
170
9 days ago
ISBN
frosster
102
9 days ago
Happy Numbers (Long)
frosster
106
9 days ago
Card Number Validation
Sciman101
147
9 days ago
brainfuck
frosster
207
9 days ago
Pangram Grep
frosster
109
9 days ago
Transpose Sentence
frosster
🥇
102
9 days ago
Foo Fizz Buzz Bar
frosster
117
10 days ago
Niven Numbers
kTheLemon
80
11 days ago
Diamonds
kTheLemon
166
11 days ago
Diamonds
Blendi-Goose
139
11 days ago
United States
frosster
246
13 days ago
PalindromemordnilaP
frosster
99
13 days ago
Game of Life
frosster
189
13 days ago
Proximity Grid
frosster
290
13 days ago
24 Game
dokutan
4,622
13 days ago
𝑒
sean-niemann
🥇
90
14 days ago
Smith Numbers
FlyingPenguin223
178
14 days ago
Minesweeper
Shanethegamer
209
14 days ago
Arabic to Roman
edsrzf
170
15 days ago
Arrows
frosster
216
16 days ago
Fizz Buzz
sean-niemann
68
16 days ago
Vampire Numbers
FlyingPenguin223
645
18 days ago
Hexdump
Blendi-Goose
243
18 days ago
brainfuck
Blendi-Goose
269
18 days ago
Fizz Buzz
frosster
82
18 days ago
Divisors
frosster
71
18 days ago
Intersection
FlyingPenguin223
162
18 days ago
Divisors
Blendi-Goose
71
18 days ago
Collatz
Blendi-Goose
72
18 days ago
Ordinal Numbers
Blendi-Goose
93
18 days ago
Kolakoski Sequence
Pyroan
104
19 days ago
Fibonacci
kTheLemon
🥇
43
19 days ago