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
Continued Fractions
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
Gray Code Decoder
Gray Code Encoder
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
Alphabetic Numbers
Apéry’s Constant
Binary Lambda Calculus
Connect Four
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Hexagonal Spiral
Highly Composite Numbers
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
All Languages
><>
ALGOL 68
ArkScript
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
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
ArkScript
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
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
Continued Fractions
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
Gray Code Decoder
Gray Code Encoder
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
Alphabetic Numbers
Apéry’s Constant
Binary Lambda Calculus
Connect Four
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Hexagonal Spiral
Highly Composite Numbers
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
Hole
Golfer
Bytes
Time
Submitted
Foo Fizz Buzz Bar
DayDun
103
13ms
3 hours ago
Evil Numbers (Long)
DayDun
51
20ms
3 hours ago
Prime Numbers
Nathan-Masala
87
13ms
4 hours ago
Emirp Numbers
Nathan-Masala
172
12ms
4 hours ago
π
mantaslu
124
2,974ms
4 hours ago
Arabic to Roman
LandonWeng
138
31ms
5 hours ago
√2
mantaslu
58
13ms
5 hours ago
Fibonacci
Nathan-Masala
38
10ms
5 hours ago
12 Days of Christmas
Andrey2001
467
11ms
6 hours ago
Game of Life
firegene
128
12ms
8 hours ago
Multitap Input
blaztoma
114
16ms
11 hours ago
QR Decoder
scpchicken
213
21ms
13 hours ago
Mandelbrot
scpchicken
126
158ms
13 hours ago
Factorial Factorisation
scpchicken
132
15ms
13 hours ago
Kaprekar Numbers
scpchicken
143
4,709ms
13 hours ago
Zodiac Signs
scpchicken
163
17ms
14 hours ago
Van Eck Sequence
edsrzf
58
12ms
14 hours ago
N Queens
scpchicken
156
31ms
14 hours ago
Lucky Numbers
edsrzf
58
12ms
14 hours ago
Rijndael S-box
scpchicken
171
14ms
15 hours ago
Fizz Buzz
Nathan-Masala
111
18ms
16 hours ago
Hilbert Curve
madex
571
21ms
17 hours ago
Multitap Input
Steffan153
🥉
108
70ms
17 hours ago
Recamán
madex
77
17ms
17 hours ago
Look and Say
madex
89
18ms
18 hours ago
Kolakoski Sequence
madex
68
11ms
18 hours ago
Pascal’s Triangle
madex
64
12ms
18 hours ago
Catalan Numbers
madex
50
12ms
18 hours ago
Emirp Numbers
madex
116
13ms
18 hours ago
Van Eck Sequence
madex
60
11ms
18 hours ago
Vampire Numbers
scpchicken
132
441ms
18 hours ago
ASCII Table
Junebug2763
291
10ms
18 hours ago
Lucky Tickets
scpchicken
101
38ms
18 hours ago
Emojify
LostSyntax21
239
11ms
18 hours ago
Leap Years
Junebug2763
74
10ms
19 hours ago
Multitap Input
scpchicken
156
16ms
19 hours ago
Quine
Junebug2763
50
10ms
19 hours ago
Fizz Buzz
Junebug2763
105
10ms
19 hours ago
Foo Fizz Buzz Bar
Junebug2763
147
11ms
19 hours ago
CSS Colors
StefanHabel
899
12ms
19 hours ago
Rijndael S-box
madex
240
11ms
20 hours ago
Collatz
edsrzf
70
21ms
20 hours ago
Polyominoes
scpchicken
323
41ms
20 hours ago
Kolakoski Sequence
edsrzf
57
12ms
20 hours ago
Happy Numbers (Long)
StefanHabel
81
303ms
21 hours ago
Odious Numbers (Long)
StefanHabel
🥇
41
11ms
21 hours ago
CSS Colors
madex
2,222
11ms
21 hours ago
Calendar
solisolu
248
35ms
21 hours ago
Odious Numbers
StefanHabel
🥇
40
10ms
21 hours ago
Smith Numbers
solisolu
208
408ms
21 hours ago
Sierpiński Triangle
LostSyntax21
65
10ms
24 hours ago
Sierpiński Triangle
madex
90
10ms
27 hours ago
Ordinal Numbers
madex
122
14ms
27 hours ago
Pangram Grep
madex
94
12ms
27 hours ago
Quine
DayDun
🥇
31
30ms
28 hours ago
Leap Years
Nathan-Masala
71
16ms
29 hours ago
Morse Encoder
Nathan-Masala
551
11ms
30 hours ago
Number Spiral
denkyuu1
145
10ms
32 hours ago
Rijndael S-box
Matter1024
227
27ms
33 hours ago
Minesweeper
firegene
136
28ms
39 hours ago
Fibonacci
StefanHabel
🥇
36
10ms
39 hours ago
Card Number Validation
scpchicken
132
17ms
39 hours ago
Prime Numbers
agreegious
41
10ms
40 hours ago
Forsyth–Edwards Notation
CaedenHarper
135
12ms
40 hours ago
Tower of Hanoi
scpchicken
58
12ms
40 hours ago
brainfuck
ComradeSquirrel
334
14ms
41 hours ago
Fractions
vang1ong7ang
🥇
73
18ms
41 hours ago
Foo Fizz Buzz Bar
vang1ong7ang
🥇
83
12ms
41 hours ago
Evil Numbers
vang1ong7ang
🥇
40
10ms
41 hours ago
Divisors
vang1ong7ang
🥇
57
11ms
41 hours ago
Day of Week
vang1ong7ang
🥇
85
15ms
41 hours ago
Catalan Numbers
vang1ong7ang
🥇
44
10ms
41 hours ago
√2
ComradeSquirrel
66
16ms
41 hours ago
Calendar
vang1ong7ang
🥇
99
17ms
41 hours ago
Factorial Factorisation
kg583
95
54ms
41 hours ago
Fizz Buzz
StefanHabel
🥇
58
10ms
42 hours ago
Billiards
Steffan153
160
18ms
43 hours ago
Lucky Numbers
Steffan153
56
12ms
43 hours ago
Star Wars Opening Crawl
BREMAUCY
399
13ms
45 hours ago
Hilbert Curve
blaztoma
257
12ms
45 hours ago