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
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
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
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
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
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
Evil Numbers (Long)
firegene
47
17ms
35 mins ago
Game of Life
CornerMercury
121
13ms
76 mins ago
Continued Fractions
msbranicky
131
10ms
77 mins ago
Semiprime Numbers
plcc0
115
136ms
116 mins ago
Prime Numbers (Long)
plcc0
45
195ms
2 hours ago
Abundant Numbers
plcc0
64
11ms
2 hours ago
Collatz
Languag3
🥉
68
17ms
3 hours ago
Abundant Numbers (Long)
plcc0
65
63ms
3 hours ago
Day of Week
Matter1024
99
16ms
3 hours ago
Fizz Buzz
Lv0Sys
59
10ms
3 hours ago
Gijswijt’s Sequence
anter69
101
11ms
3 hours ago
Niven Numbers
plcc0
45
10ms
4 hours ago
Zeckendorf Representation
Matter1024
123
13ms
5 hours ago
Continued Fractions
cros107
156
10ms
6 hours ago
Mahjong
Seek64
361
39ms
6 hours ago
brainfuck
StefanHabel
269
19ms
7 hours ago
Mandelbrot
olleicua
10,016
13ms
7 hours ago
ASCII Table
StefanHabel
99
10ms
8 hours ago
Continued Fractions
ahmetdemirag
130
10ms
8 hours ago
Arithmetic Numbers
karadigm01
83
1,446ms
8 hours ago
Smith Numbers
StefanHabel
162
756ms
9 hours ago
Continued Fractions
JayXon
🥇
123
30ms
9 hours ago
Inventory Sequence
StefanHabel
79
18ms
9 hours ago
Abundant Numbers (Long)
karadigm01
71
20ms
9 hours ago
Abundant Numbers
karadigm01
70
10ms
9 hours ago
Zeckendorf Representation
Emutis
133
10ms
10 hours ago
Reverse Polish Notation
Emutis
159
16ms
10 hours ago
Gijswijt’s Sequence
Emutis
164
169ms
10 hours ago
Recamán
Emutis
72
10ms
10 hours ago
12 Days of Christmas
karadigm01
518
10ms
10 hours ago
Sudoku
CornerMercury
444
17ms
11 hours ago
Continued Fractions
btjones0
124
10ms
13 hours ago
Hilbert Curve
snoozingnewt
307
11ms
14 hours ago
Continued Fractions
lukegustafson
🥇
123
10ms
14 hours ago
Game of Life
snoozingnewt
134
13ms
14 hours ago
Mahjong
snoozingnewt
303
2,090ms
14 hours ago
Number Spiral
snoozingnewt
97
10ms
14 hours ago
Trinomial Triangle
snoozingnewt
🥇
64
11ms
14 hours ago
Sierpiński Triangle
snoozingnewt
68
10ms
14 hours ago
Pascal’s Triangle
snoozingnewt
🥇
54
11ms
14 hours ago
Continued Fractions
Flekay
125
10ms
14 hours ago
Continued Fractions
emgordon154
124
10ms
14 hours ago
Sudoku
Flekay
402
60ms
15 hours ago
Sierpiński Triangle
Flekay
68
10ms
15 hours ago
Hilbert Curve
Flekay
307
16ms
17 hours ago
Transpose Sentence
BrunoVisnadi
112
20ms
17 hours ago
Continued Fractions
Emutis
🥇
123
10ms
18 hours ago
Continued Fractions
commandz0
🥇
123
10ms
19 hours ago
Tower of Hanoi
snoozingnewt
58
12ms
19 hours ago
Continued Fractions
AstroOrbis
211
10ms
19 hours ago
Smith Numbers
snoozingnewt
114
2,839ms
19 hours ago
Prime Numbers (Long)
snoozingnewt
🥇
44
124ms
19 hours ago
Arrows
snoozingnewt
106
11ms
19 hours ago
99 Bottles of Beer
snoozingnewt
225
10ms
19 hours ago
CSS Colors
Lv0Sys
2,317
11ms
20 hours ago
Trinomial Triangle
dokutan
67
11ms
23 hours ago
Prime Numbers
dokutan
41
10ms
23 hours ago
Prime Numbers (Long)
dokutan
🥇
44
125ms
23 hours ago
Catalan Numbers
firegene
66
14ms
23 hours ago
Number Spiral
Flekay
100
10ms
23 hours ago
Continued Fractions
Lv0Sys
🥇
123
10ms
23 hours ago
Ten-pin Bowling
Matter1024
1,320
11ms
24 hours ago
Game of Life
Flekay
148
11ms
24 hours ago
QR Decoder
Lv0Sys
160
10ms
25 hours ago
Multitap Input
hiichbindermax
245
11ms
25 hours ago
Flags
plcc0
585
35ms
25 hours ago
Trinomial Triangle
Flekay
🥇
64
11ms
25 hours ago
Pascal’s Triangle
Flekay
🥇
54
11ms
25 hours ago
Collatz
parthm2005
83
16ms
26 hours ago
QR Decoder
kg583
180
16ms
26 hours ago
ISBN
firegene
103
10ms
27 hours ago
Kaprekar Numbers
blaztoma
88
1,933ms
28 hours ago
Smith Numbers
Lv0Sys
132
2,182ms
31 hours ago
Continued Fractions
StefanHabel
🥇
123
9ms
31 hours ago
Rijndael S-box
JayXon
🥈
129
18ms
32 hours ago
Calendar
solisolu
277
15ms
32 hours ago
Calendar
Languag3
🥇
99
15ms
33 hours ago
Tongue-twisters
Techdude01
438
10ms
35 hours ago
12 Days of Christmas
Techdude01
472
10ms
35 hours ago
Arithmetic Numbers
Techdude01
86
1,487ms
35 hours ago