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
Calendar
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
Multitap Input
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
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
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
><>
ALGOL 68
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
APL
ArkScript
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Lily
Luau
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
Umka
Vala
Vyxal
Bytes
Chars
Scoring
Bytes
Chars
Language
All
><>
ALGOL 68
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
APL
ArkScript
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Lily
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
Calendar
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
Multitap Input
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
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
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
Fibonacci
edsrzf
🥇
49
6ms
5 mins ago
Intersection
Protothor
204
11ms
6 mins ago
Catalan Numbers
edsrzf
🥇
65
7ms
12 mins ago
Rule 110
edsrzf
💎
107
33ms
16 mins ago
Star Wars GPT
Lv0Sys
143
14ms
17 mins ago
Multitap Input
Protothor
143
10ms
28 mins ago
Quine
emgordon154
🥇
25
10ms
33 mins ago
ln 2
edsrzf
🥇
97
88ms
44 mins ago
ln 2
DialFrost
🥇
97
28ms
45 mins ago
Abundant Numbers
sean-niemann
97
24ms
52 mins ago
Happy Numbers (Long)
sean-niemann
🥇
136
27ms
55 mins ago
Prime Numbers
GolfingSuccess
🥈
61
6ms
56 mins ago
Intersection
copy
39
3ms
65 mins ago
𝑒
DialFrost
🥇
94
11ms
73 mins ago
Odious Numbers
FranklinJiaChen
69
2ms
94 mins ago
Evil Numbers
FranklinJiaChen
69
2ms
94 mins ago
Odious Numbers (Long)
FranklinJiaChen
81
2ms
108 mins ago
Evil Numbers (Long)
FranklinJiaChen
81
2ms
108 mins ago
Collatz
Steffan153
💎
77
25ms
109 mins ago
Polyominoes
albanian-laundromat
💎
404
45ms
110 mins ago
Card Number Validation
lukegustafson
71
10ms
113 mins ago
Fizz Buzz
GolfingSuccess
88
6ms
117 mins ago
Foo Fizz Buzz Bar
GolfingSuccess
129
8ms
118 mins ago
Prime Numbers
Steffan153
💎
52
6ms
2 hours ago
Pascal’s Triangle
Steffan153
💎
65
6ms
2 hours ago
𝑒
edsrzf
🥇
94
28ms
2 hours ago
Multitap Input
albanian-laundromat
💎
210
41ms
2 hours ago
Collatz
GolfingSuccess
80
16ms
2 hours ago
Fizz Buzz
Steffan153
🥈
78
6ms
2 hours ago
Mahjong
plcc0
143
42ms
2 hours ago
Pernicious Numbers
Steffan153
💎
53
7ms
2 hours ago
Multitap Input
albanian-laundromat
💎
108
4ms
2 hours ago
Collatz
kg583
🥈
78
20ms
2 hours ago
Collatz
kg583
🥇
76
12ms
2 hours ago
Collatz
kg583
111
55ms
2 hours ago
Happy Numbers
GrayJoKing
🥈
82
7ms
2 hours ago
Collatz
GrayJoKing
🥇
74
16ms
3 hours ago
Farey Sequence
emgordon154
59
3ms
3 hours ago
Quine
CaedenHarper
70
6ms
3 hours ago
Taxicab Numbers
canissimia
648
3,800ms
3 hours ago
Collatz
Steffan153
🥇
74
17ms
3 hours ago
Niven Numbers (Long)
emgordon154
26
3ms
3 hours ago
Niven Numbers
emgordon154
24
3ms
3 hours ago
Fizz Buzz
CaedenHarper
96
6ms
3 hours ago
Tongue-twisters
CaedenHarper
🥈
560
6ms
3 hours ago
Divisors
GolfingSuccess
🥇
59
7ms
3 hours ago
Quine
Steffan153
🥇
14
6ms
3 hours ago
γ
CaedenHarper
🥈
1,011
6ms
3 hours ago
Rijndael S-box
CaedenHarper
🥈
809
6ms
3 hours ago
Kaprekar Numbers
CaedenHarper
🥉
585
6ms
3 hours ago
N Queens
CaedenHarper
🥈
1,551
8ms
3 hours ago
Number Spiral
CaedenHarper
🥉
329
6ms
3 hours ago
ASCII Table
CaedenHarper
🥈
318
6ms
3 hours ago
Abundant Numbers
emgordon154
29
4ms
3 hours ago
Abundant Numbers (Long)
emgordon154
30
27ms
3 hours ago
Vampire Numbers
CaedenHarper
🥈
1,390
7ms
3 hours ago
Happy Numbers
CaedenHarper
180
6ms
3 hours ago
Emirp Numbers
CaedenHarper
🥉
217
7ms
3 hours ago
Hilbert Curve
CaedenHarper
🥈
2,121
6ms
3 hours ago
Fizz Buzz
GrayJoKing
🥈
78
6ms
3 hours ago
Prime Numbers
CaedenHarper
130
6ms
3 hours ago
Niven Numbers
CaedenHarper
166
7ms
3 hours ago
Polyominoes
CaedenHarper
🥈
6,105
86ms
3 hours ago
λ
CaedenHarper
🥈
1,011
6ms
3 hours ago
Abundant Numbers
CaedenHarper
264
6ms
3 hours ago
12 Days of Christmas
CaedenHarper
🥉
2,604
8ms
3 hours ago
Evil Numbers
CaedenHarper
129
6ms
3 hours ago
Pernicious Numbers
CaedenHarper
179
6ms
3 hours ago
Odious Numbers
CaedenHarper
134
7ms
3 hours ago
Ascending Primes
CaedenHarper
🥉
721
7ms
3 hours ago
Leyland Numbers
CaedenHarper
🥈
1,109
7ms
3 hours ago
Fibonacci
CaedenHarper
205
6ms
3 hours ago
Sierpiński Triangle
CaedenHarper
🥈
433
6ms
3 hours ago
Christmas Trees
CaedenHarper
🥈
664
6ms
3 hours ago
Factorial Factorisation
CaedenHarper
🥉
870
5ms
3 hours ago
Abundant Numbers (Long)
GolfingSuccess
💎
72
26ms
3 hours ago
Happy Numbers (Long)
CaedenHarper
🥉
847
7ms
3 hours ago
Cubes
CaedenHarper
🥈
3,058
7ms
3 hours ago
Emirp Numbers (Long)
CaedenHarper
🥉
1,645
10ms
3 hours ago
Diamonds
CaedenHarper
🥈
1,290
7ms
3 hours ago