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
Kolakoski Constant
ovs-code
💎
35
585ms
16 hours ago
Kolakoski Constant
2bular
🥈
36
92ms
23 hours ago
Mandelbrot
jusaka
10,290
36ms
2 days ago
Gray Code Decoder
jusaka
139
41ms
2 days ago
Gray Code Encoder
jusaka
90
38ms
2 days ago
Arabic to Roman
jusaka
715
45ms
2 days ago
Polyominoes
jusaka
12,425
34ms
2 days ago
PalindromemordnilaP
jusaka
137
34ms
2 days ago
24 Game
jusaka
21,965
36ms
2 days ago
Transpose Sentence
jusaka
182
39ms
2 days ago
Day of Week
jusaka
301
39ms
2 days ago
Seven Segment
jusaka
261
34ms
2 days ago
Minesweeper
jusaka
543
73ms
2 days ago
Levenshtein Distance
jusaka
273
36ms
2 days ago
Arrows
jusaka
976
40ms
2 days ago
Intersection
jusaka
180
34ms
2 days ago
Tic-tac-toe
jusaka
499
38ms
2 days ago
Rock-paper-scissors-Spock-lizard
jusaka
1,214
44ms
2 days ago
United States
jusaka
742
36ms
3 days ago
Spelling Numbers
jusaka
25,586
38ms
3 days ago
Prime Numbers (Long)
jusaka
25
39ms
3 days ago
Prime Numbers
jusaka
23
36ms
3 days ago
Niven Numbers
jusaka
61
35ms
3 days ago
Card Number Validation
jusaka
189
34ms
3 days ago
ISBN
jusaka
158
35ms
3 days ago
Zodiac Signs
jusaka
624
38ms
3 days ago
Zeckendorf Representation
jusaka
197
38ms
3 days ago
Fractions
jusaka
136
33ms
3 days ago
Tutorial
jusaka
49
52ms
3 days ago
Lucky Tickets
jusaka
279
61ms
3 days ago
Sphenic Numbers
jusaka
113
52ms
3 days ago
Roman to Arabic
jusaka
127
44ms
3 days ago
Pernicious Numbers (Long)
jusaka
70
39ms
3 days ago
Pangram Grep
jusaka
110
43ms
3 days ago
ROT13
jusaka
179
42ms
3 days ago
Ordinal Numbers
jusaka
196
41ms
3 days ago
Christmas Trees
jusaka
117
37ms
3 days ago
ASCII Table
jusaka
194
35ms
3 days ago
Arithmetic Numbers
jusaka
66
127ms
3 days ago
99 Bottles of Beer
jusaka
448
40ms
3 days ago
Fizz Buzz
jusaka
1,321
34ms
3 days ago
Sierpiński Triangle
jusaka
706
35ms
3 days ago
Number Spiral
jusaka
398
36ms
3 days ago
Niven Numbers (Long)
jusaka
21,288
40ms
3 days ago
Hilbert Curve
jusaka
5,414
36ms
3 days ago
Foo Fizz Buzz Bar
jusaka
14,727
34ms
3 days ago
Factorial Factorisation
jusaka
879
36ms
3 days ago
Diamonds
jusaka
1,912
36ms
3 days ago
Cubes
jusaka
5,108
36ms
3 days ago
Rule 110
2bular
🥈
42
42ms
5 days ago
Divisors
snoozingnewt
23
34ms
6 days ago
Evil Numbers (Long)
scpchicken
🥇
20
35ms
7 days ago
Evil Numbers
scpchicken
🥇
18
33ms
7 days ago
Tower of Hanoi
scpchicken
102
36ms
7 days ago
Divisors
blaztoma
22
34ms
8 days ago
Niven Numbers
madeforlosers
47
34ms
8 days ago
DFA Simulator
2bular
🥈
101
35ms
9 days ago
Van Eck Sequence
jusaka
11,566
43ms
9 days ago
Vampire Numbers
jusaka
2,477
53ms
9 days ago
Trinomial Triangle
jusaka
2,255
43ms
9 days ago
Taxicab Numbers
jusaka
8,536
35ms
9 days ago
Smith Numbers
jusaka
5,219
43ms
9 days ago
Rijndael S-box
jusaka
923
44ms
9 days ago
Recamán
jusaka
3,158
41ms
9 days ago
Polygon Triangulations
jusaka
6,087
42ms
9 days ago
Pascal’s Triangle
jusaka
960
47ms
9 days ago
Partition Numbers
jusaka
1,558
38ms
9 days ago
Odious Numbers (Long)
jusaka
6,456
46ms
9 days ago
N Queens
jusaka
2,589
36ms
9 days ago
Lucky Numbers
jusaka
13,831
51ms
9 days ago
Look and Say
jusaka
1,470
33ms
9 days ago
Leyland Numbers
jusaka
1,860
41ms
9 days ago
Leap Years
jusaka
2,055
35ms
9 days ago
Kaprekar Numbers
jusaka
1,063
39ms
9 days ago
Inventory Sequence
jusaka
11,634
55ms
9 days ago
Highly Composite Numbers
jusaka
952
48ms
9 days ago
Happy Numbers (Long)
jusaka
1,850
44ms
9 days ago
Gijswijt’s Sequence
jusaka
11,008
39ms
9 days ago
Farey Sequence
jusaka
11,337
48ms
9 days ago
Evil Numbers (Long)
jusaka
6,470
48ms
9 days ago