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
Numbrix
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
Numbrix
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
Chars
Time
Submitted
Collatz
emgordon154
76
3ms
5 hours ago
brainfuck
HumanoidCPU
235
2ms
6 hours ago
Niven Numbers
kellantech
55
2ms
13 hours ago
Abundant Numbers
kellantech
87
2ms
13 hours ago
τ
ovs-code
124
14ms
14 hours ago
π
ovs-code
123
14ms
14 hours ago
N Queens
ovs-code
💎
111
5ms
15 hours ago
Quine
ovs-code
66
2ms
15 hours ago
Day of Week
luuumine
221
3ms
16 hours ago
Quine
sean-niemann
68
2ms
19 hours ago
Quine
Yewzir
66
2ms
21 hours ago
Quine
DialFrost
68
2ms
23 hours ago
Quine
Mukundan314
66
2ms
25 hours ago
PalindromemordnilaP
rhdqor213
🥉
107
2ms
26 hours ago
ROT13
rhdqor213
81
2ms
28 hours ago
12 Days of Christmas
JayXon
278
2ms
29 hours ago
Tongue-twisters
JayXon
💎
204
2ms
29 hours ago
Quine
GolfingSuccess
68
2ms
30 hours ago
Odious Numbers (Long)
m-tkach
54
2ms
37 hours ago
Evil Numbers (Long)
m-tkach
56
2ms
37 hours ago
Evil Numbers (Long)
rhdqor213
💎
49
88ms
39 hours ago
Tower of Hanoi
SirObby
3,595
2ms
40 hours ago
Christmas Trees
rhdqor213
💎
77
2ms
41 hours ago
ROT13
luuumine
103
4ms
43 hours ago
Prime Numbers (Long)
luuumine
71
63ms
45 hours ago
N Queens
KasperKivimaeki
132
2ms
46 hours ago
99 Bottles of Beer
rhdqor213
211
2ms
47 hours ago
Abundant Numbers
balloffur
88
2ms
2 days ago
ROT13
balloffur
143
5ms
2 days ago
Evil Numbers (Long)
Lv0Sys
74
2ms
2 days ago
Odious Numbers (Long)
Lv0Sys
73
2ms
2 days ago
Fibonacci
bzd7
47
2ms
2 days ago
Divisors
balloffur
78
2ms
2 days ago
Niven Numbers (Long)
balloffur
81
2ms
3 days ago
Fibonacci
balloffur
52
2ms
3 days ago
Arithmetic Numbers
sean-niemann
80
69ms
3 days ago
Card Number Validation
bzd7
92
2ms
3 days ago
Inventory Sequence
solisolu
68
2ms
3 days ago
Hexdump
Lv0Sys
225
3ms
3 days ago
ASCII Table
Lv0Sys
139
2ms
3 days ago
Topological Sort
rhdqor213
161
4ms
3 days ago
Card Number Validation
KasperKivimaeki
🥉
79
2ms
3 days ago
Prime Numbers (Long)
Lv0Sys
61
10ms
3 days ago
Tower of Hanoi
rhdqor213
🥇
65
2ms
4 days ago
Evil Numbers (Long)
GodlyProgrammer1
113
2ms
4 days ago
Card Number Validation
rhdqor213
💎
74
2ms
4 days ago
Card Number Validation
luuumine
92
1ms
4 days ago
Spelling Numbers
prestosilver
407
4ms
4 days ago
Mahjong
bitsandbeyond
786
2ms
4 days ago
Abundant Numbers (Long)
0xA00
101
2ms
5 days ago
Fibonacci
0xA00
93
11ms
5 days ago
Prime Numbers (Long)
0xA00
78
43ms
5 days ago
Tower of Hanoi
Alex-x90
67
2ms
5 days ago
Intersection
Lv0Sys
174
2ms
5 days ago
Niven Numbers
snoozingnewt
54
2ms
6 days ago
Prime Numbers (Long)
snoozingnewt
58
43ms
6 days ago
Fibonacci
snoozingnewt
🥉
46
2ms
6 days ago
Pernicious Numbers
snoozingnewt
🥇
47
2ms
6 days ago
Collatz
0xA00
110
2ms
6 days ago
Leap Years
0xA00
79
2ms
6 days ago
Tower of Hanoi
luuumine
67
2ms
6 days ago
Ascending Primes
prestosilver
528
2ms
6 days ago
Arithmetic Numbers
prestosilver
83
81ms
6 days ago
Abundant Numbers (Long)
prestosilver
73
3ms
6 days ago
Abundant Numbers
prestosilver
72
2ms
6 days ago
λ
prestosilver
1,019
1ms
6 days ago
Collatz
prestosilver
73
2ms
6 days ago
Tower of Hanoi
aksyristos
87
2ms
6 days ago
Collatz
solisolu
83
2ms
6 days ago
Ordinal Numbers
Lv0Sys
99
2ms
6 days ago
Tower of Hanoi
prestosilver
97
2ms
6 days ago
Billiards
Maashau
280
2ms
6 days ago
Pangram Grep
AlephSquirrel
93
2ms
7 days ago
Minesweeper
rhdqor213
💎
118
12ms
7 days ago
Lucky Numbers
sean-niemann
81
3ms
7 days ago