Recent Solutions
Achievements
Cheevos
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
Tower of Hanoi
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
Multitap Input
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
All Languages
><>
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Common Lisp
Crystal
D
Dart
Elixir
Erlang
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
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
Erlang
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
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
Tower of Hanoi
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
Multitap Input
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
Hole
Golfer
Bytes
Time
Submitted
Collatz
Lv0Sys
73
24ms
3 mins ago
Hilbert Curve
scpchicken
591
18ms
11 mins ago
Tower of Hanoi
qpwoeirut
57
11ms
5 hours ago
Rijndael S-box
TheZwierzLF
244
10ms
7 hours ago
Rule 110
TheZwierzLF
15,864
14ms
7 hours ago
Set
TheZwierzLF
171
30ms
7 hours ago
SI Units
TheZwierzLF
631
15ms
8 hours ago
Multitap Input
bricknellj
135
15ms
9 hours ago
Tower of Hanoi
hippalectryon-0
74
11ms
9 hours ago
Topological Sort
Artemis21
187
70ms
9 hours ago
Rule 110
solisolu
103
11ms
10 hours ago
Hilbert Curve
LostSyntax21
5,130
11ms
10 hours ago
Medal Tally
snoozingnewt
158
11ms
10 hours ago
QR Decoder
TheZwierzLF
360
13ms
10 hours ago
QR Decoder
snoozingnewt
199
16ms
10 hours ago
Continued Fractions
5cw
123
10ms
10 hours ago
Kolakoski Constant
snoozingnewt
107
10ms
11 hours ago
Leap Years
solisolu
50
10ms
11 hours ago
Recamán
albanian-laundromat
63
10ms
12 hours ago
Arrows
LostSyntax21
207
10ms
12 hours ago
Musical Chords
snoozingnewt
202
18ms
12 hours ago
Hexdump
Lv0Sys
177
10ms
13 hours ago
Time Distance
Lv0Sys
277
11ms
13 hours ago
Card Number Validation
snoozingnewt
102
10ms
13 hours ago
Multitap Input
kg583
116
16ms
13 hours ago
ln 2
BREMAUCY
57
17ms
13 hours ago
𝑒
BREMAUCY
🥇
48
17ms
13 hours ago
Evil Numbers
LostSyntax21
41
11ms
13 hours ago
Odious Numbers
LostSyntax21
46
10ms
13 hours ago
Lucky Numbers
Lv0Sys
84
15ms
14 hours ago
Reverse Polish Notation
Lv0Sys
122
21ms
15 hours ago
Look and Say
Andrey2001
115
10ms
15 hours ago
Leyland Numbers
Andrey2001
91
10ms
15 hours ago
Catalan Numbers
Lv0Sys
47
9ms
16 hours ago
𝑒
FortuiteMan
59
16ms
16 hours ago
Kolakoski Sequence
Andrey2001
82
11ms
18 hours ago
Seven Segment
FortuiteMan
159
9ms
18 hours ago
Maze
blaztoma
189
14ms
18 hours ago
Game of Life
blaztoma
136
11ms
19 hours ago
Arabic to Roman
FortuiteMan
152
21ms
19 hours ago
Number Spiral
Lv0Sys
161
16ms
19 hours ago
12 Days of Christmas
hippalectryon-0
473
10ms
19 hours ago
ISBN
Lv0Sys
103
10ms
19 hours ago
Pascal’s Triangle
FortuiteMan
58
10ms
20 hours ago
PalindromemordnilaP
HPWiz
🥇
80
14ms
20 hours ago
99 Bottles of Beer
FortuiteMan
235
10ms
20 hours ago
Continued Fractions
hallvabo
123
10ms
21 hours ago
Multitap Input
Shanethegamer
176
30ms
23 hours ago
Catalan’s Constant
Lv0Sys
151
132ms
23 hours ago
Hilbert Curve
Seek64
484
12ms
25 hours ago
Arrows
lukegustafson
🥈
99
30ms
26 hours ago
Tutorial
slimer37
86
10ms
26 hours ago
Arrows
slimer37
195
10ms
27 hours ago
Catalan’s Constant
cros107
126
257ms
28 hours ago
Sierpiński Triangle
cros107
79
9ms
28 hours ago
Scrambled Sort
snoozingnewt
92
11ms
28 hours ago
Christmas Trees
snoozingnewt
79
10ms
29 hours ago
Collatz
snoozingnewt
72
22ms
29 hours ago
Topological Sort
snoozingnewt
139
44ms
29 hours ago
DFA Simulator
snoozingnewt
164
12ms
30 hours ago
Multitap Input
commandblockguy
122
15ms
32 hours ago
Pernicious Numbers (Long)
snoozingnewt
54
16ms
33 hours ago
Farey Sequence
solisolu
133
12ms
33 hours ago
Multitap Input
albanian-laundromat
151
10ms
33 hours ago
Hilbert Curve
TheZwierzLF
918
10ms
34 hours ago
Inventory Sequence
Lydxn
🥉
55
34ms
35 hours ago
Foo Fizz Buzz Bar
Lv0Sys
88
11ms
37 hours ago
Musical Chords
Lv0Sys
239
19ms
37 hours ago
Arithmetic Numbers
ovs-code
💎
72
4,348ms
37 hours ago
Smith Numbers
Lv0Sys
159
41ms
38 hours ago
Card Number Validation
Florian-Mt
136
15ms
38 hours ago
Happy Numbers (Long)
Lv0Sys
85
20ms
38 hours ago
QR Decoder
Lv0Sys
336
16ms
39 hours ago
Tutorial
geck007
66
10ms
39 hours ago
Fractions
Lv0Sys
95
16ms
39 hours ago