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
Hilbert Curve
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
Minesweeper
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
Trinomial Triangle
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Apéry’s Constant
Binary Lambda Calculus
Calendar
Connect Four
Continued Fractions
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Tower of Hanoi
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
Groovy
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
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Luau
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
Groovy
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
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Luau
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
Hilbert Curve
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
Minesweeper
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
Trinomial Triangle
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Experimental Hole
Apéry’s Constant
Binary Lambda Calculus
Calendar
Connect Four
Continued Fractions
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Tower of Hanoi
Turtle
Tutorial
Hole
Golfer
Bytes
Time
Submitted
Fractions
hellopir2
91
16ms
11 mins ago
12 Days of Christmas
bradye31
519
10ms
16 mins ago
Continued Fractions
hellopir2
123
10ms
33 mins ago
Reversi
snoozingnewt
230
12ms
56 mins ago
Medal Tally
CornerMercury
147
11ms
57 mins ago
Maze
snoozingnewt
192
13ms
62 mins ago
Maze
CaedenHarper
206
50ms
77 mins ago
Mahjong
snoozingnewt
324
18ms
79 mins ago
Smith Numbers
duckyluuk
128
2,642ms
2 hours ago
Collatz
JOrE20
77
21ms
3 hours ago
Poker
jatloe
308
19ms
3 hours ago
Star Wars GPT
CornerMercury
133
11ms
3 hours ago
Van Eck Sequence
ryyyn
61
16ms
4 hours ago
Kaprekar Numbers
snoozingnewt
115
1,931ms
4 hours ago
Minesweeper
jatloe
153
20ms
4 hours ago
Mandelbrot
vhoulbreque
164
309ms
4 hours ago
Factorial Factorisation
snoozingnewt
121
14ms
5 hours ago
Card Number Validation
snoozingnewt
115
11ms
5 hours ago
Rijndael S-box
luuumine
239
17ms
5 hours ago
Arabic to Roman
snoozingnewt
165
30ms
6 hours ago
Roman to Arabic
snoozingnewt
136
18ms
6 hours ago
Repeating Decimals
snoozingnewt
198
11ms
6 hours ago
Set
snoozingnewt
126
26ms
6 hours ago
Musical Chords
snoozingnewt
223
18ms
6 hours ago
12 Days of Christmas
KasperKivimaeki
555
10ms
6 hours ago
Game of Life
snoozingnewt
144
13ms
6 hours ago
Repeating Decimals
duckyluuk
197
11ms
6 hours ago
Gijswijt’s Sequence
Seek64
83
11ms
7 hours ago
Game of Life
Seek64
118
12ms
7 hours ago
Rule 110
CornerMercury
78
13ms
9 hours ago
Fibonacci
FortuiteMan
🥇
36
10ms
9 hours ago
Card Number Validation
rollershutter
129
16ms
10 hours ago
United States
Babafaba
132
10ms
10 hours ago
Time Distance
bzijlema
254
11ms
11 hours ago
Emirp Numbers (Long)
GrayJoKing
100
112ms
12 hours ago
Tongue-twisters
albanian-laundromat
341
10ms
13 hours ago
brainfuck
webmiche
182
19ms
13 hours ago
Trinomial Triangle
neihousaigaai
81
10ms
15 hours ago
Proximity Grid
snoozingnewt
245
12ms
16 hours ago
Topological Sort
snoozingnewt
147
32ms
16 hours ago
Minesweeper
neihousaigaai
177
23ms
16 hours ago
Sierpiński Triangle
snoozingnewt
88
10ms
17 hours ago
Star Wars GPT
snoozingnewt
130
11ms
18 hours ago
24 Game
zhaohm14
248
837ms
18 hours ago
Roman to Arabic
qpwoeirut
123
19ms
19 hours ago
Morse Decoder
ryyyn
172
10ms
20 hours ago
Minesweeper
andrewjc2000
198
55ms
20 hours ago
Happy Numbers (Long)
albanian-laundromat
85
21ms
20 hours ago
12 Days of Christmas
LeviKataja
822
9ms
21 hours ago
Ordinal Numbers
CommandLeo
108
12ms
21 hours ago
Pernicious Numbers (Long)
solisolu
57
18ms
22 hours ago
Continued Fractions
Shanethegamer
137
31ms
22 hours ago
Collatz
mmoffitt
75
22ms
22 hours ago
Pernicious Numbers
solisolu
55
9ms
23 hours ago
ASCII Table
M4rc0g1
128
9ms
25 hours ago
United States
joshmoody24
230
13ms
25 hours ago
Hexdump
dahrens
272
10ms
25 hours ago
Continued Fractions
ovs-code
123
10ms
25 hours ago
Arrows
robbertvz
251
10ms
26 hours ago
Foo Fizz Buzz Bar
JOrE20
86
11ms
27 hours ago
Abundant Numbers (Long)
robbertvz
82
20ms
27 hours ago
Abundant Numbers
robbertvz
81
10ms
27 hours ago
99 Bottles of Beer
robbertvz
351
10ms
27 hours ago
Factorial Factorisation
CommandLeo
141
21ms
27 hours ago
Prime Numbers (Long)
luuumine
61
186ms
27 hours ago
Arithmetic Numbers
robbertvz
85
1,853ms
27 hours ago
Roman to Arabic
JOrE20
134
493ms
29 hours ago
ISBN
123mjb
161
16ms
30 hours ago
DFA Simulator
CornerMercury
189
13ms
30 hours ago
Pernicious Numbers
123mjb
113
10ms
30 hours ago
Kolakoski Constant
CornerMercury
81
52ms
31 hours ago
Kolakoski Constant
ryyyn
85
62ms
31 hours ago
Tic-tac-toe
CornerMercury
109
14ms
32 hours ago
Farey Sequence
luuumine
79
11ms
32 hours ago
Repeating Decimals
CornerMercury
201
11ms
32 hours ago