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
><>
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
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
><>
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
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
Bytes
Time
Submitted
Polyominoes
JOrE20
509
19ms
4 mins ago
Niven Numbers
Aquateraneal
62
9ms
45 mins ago
Foo Fizz Buzz Bar
Aquateraneal
107
11ms
51 mins ago
Rule 110
firegene
121
18ms
61 mins ago
Catalan Numbers
JOrE20
51
10ms
73 mins ago
Multitap Input
bzijlema
124
20ms
87 mins ago
Tutorial
JoeCustoms
79
11ms
2 hours ago
Polyominoes
Seek64
💎
128
32ms
2 hours ago
Factorial Factorisation
lelbal
140
16ms
2 hours ago
λ
Flekay
209
47ms
3 hours ago
γ
Flekay
113
58ms
3 hours ago
Multitap Input
Jonson26
300
11ms
4 hours ago
τ
Flekay
75
11ms
5 hours ago
Tic-tac-toe
solisolu
115
15ms
5 hours ago
π
Flekay
75
11ms
5 hours ago
ASCII Table
Jonson26
365
18ms
6 hours ago
Tutorial
Jonson26
88
10ms
6 hours ago
Prime Numbers
blaztoma
🥇
40
11ms
6 hours ago
Catalan’s Constant
Flekay
174
21ms
8 hours ago
ln 2
Flekay
🥇
53
22ms
8 hours ago
𝑒
Flekay
🥇
48
17ms
9 hours ago
Leyland Numbers
FoxInTheClouds
82
10ms
9 hours ago
Happy Numbers (Long)
FoxInTheClouds
82
218ms
11 hours ago
Pernicious Numbers
AstroOrbis
57
11ms
12 hours ago
Evil Numbers
AstroOrbis
44
9ms
12 hours ago
Odious Numbers
AstroOrbis
46
10ms
12 hours ago
Ordinal Numbers
FoxInTheClouds
91
12ms
13 hours ago
Zeckendorf Representation
snoozingnewt
119
12ms
14 hours ago
Rijndael S-box
snoozingnewt
161
14ms
15 hours ago
Trinomial Triangle
snoozingnewt
67
11ms
15 hours ago
Ten-pin Bowling
snoozingnewt
220
10ms
15 hours ago
Sierpiński Triangle
snoozingnewt
78
10ms
15 hours ago
Repeating Decimals
snoozingnewt
193
10ms
15 hours ago
Poker
snoozingnewt
344
18ms
15 hours ago
Pernicious Numbers (Long)
snoozingnewt
53
23ms
15 hours ago
Niven Numbers (Long)
snoozingnewt
54
17ms
15 hours ago
Morse Encoder
snoozingnewt
198
10ms
15 hours ago
Kolakoski Constant
snoozingnewt
102
66ms
15 hours ago
Jacobi Symbol
snoozingnewt
144
11ms
15 hours ago
Inventory Sequence
snoozingnewt
59
31ms
15 hours ago
Forsyth–Edwards Notation
snoozingnewt
144
10ms
15 hours ago
γ
snoozingnewt
154
59ms
15 hours ago
Diamonds
snoozingnewt
95
17ms
15 hours ago
Cubes
snoozingnewt
203
10ms
15 hours ago
Collatz
snoozingnewt
71
18ms
15 hours ago
Christmas Trees
snoozingnewt
77
10ms
15 hours ago
Semiprime Numbers
elgan65536
142
4,275ms
15 hours ago
Seven Segment
Steffan153
115
10ms
15 hours ago
Arithmetic Numbers
Heathcorp
83
2,038ms
16 hours ago
Emojify
ryyyn
131
10ms
17 hours ago
24 Game
Flekay
253
1,591ms
18 hours ago
Rijndael S-box
Flekay
188
13ms
18 hours ago
Ten-pin Bowling
Flekay
220
10ms
18 hours ago
Seven Segment
Flekay
140
16ms
18 hours ago
Morse Decoder
Flekay
203
10ms
18 hours ago
Time Distance
Flekay
284
11ms
19 hours ago
Star Wars Opening Crawl
Flekay
351
10ms
19 hours ago
N Queens
Flekay
152
61ms
19 hours ago
Poker
Flekay
344
18ms
19 hours ago
Morse Encoder
Flekay
198
11ms
19 hours ago
Cubes
Flekay
203
10ms
19 hours ago
Diamonds
Flekay
95
16ms
19 hours ago
Kolakoski Constant
Flekay
102
58ms
19 hours ago
Repeating Decimals
Flekay
193
10ms
19 hours ago
Gijswijt’s Sequence
Flekay
103
4,924ms
19 hours ago
Arabic to Roman
Flekay
151
19ms
20 hours ago
Sierpiński Triangle
Flekay
78
10ms
20 hours ago
Polyominoes
klixel
452
647ms
20 hours ago
Christmas Trees
Flekay
77
10ms
20 hours ago
Hexdump
Flekay
144
10ms
20 hours ago
Lucky Numbers
Flekay
75
11ms
20 hours ago
Inventory Sequence
Flekay
59
32ms
20 hours ago
φ
Flekay
70
12ms
20 hours ago
Zeckendorf Representation
Flekay
119
11ms
20 hours ago
Ten-pin Bowling
edsrzf
🥇
128
29ms
20 hours ago
DFA Simulator
Flekay
171
12ms
20 hours ago
99 Bottles of Beer
Flekay
244
17ms
20 hours ago
Emirp Numbers
Flekay
77
11ms
20 hours ago
brainfuck
Flekay
204
22ms
20 hours ago
Jacobi Symbol
Flekay
144
12ms
20 hours ago