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
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
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
Calendar
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
Multitap Input
NFA Simulator
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
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
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
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
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
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
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
Calendar
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
Multitap Input
NFA Simulator
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
Gray Code Decoder
albanian-laundromat
273
47ms
41 hours ago
Polyominoes
HumanoidCPU
11,871
15ms
2 days ago
Odious Numbers (Long)
albanian-laundromat
195
12ms
2 days ago
Evil Numbers (Long)
albanian-laundromat
189
13ms
2 days ago
Set
albanian-laundromat
🥈
543
12ms
2 days ago
Topological Sort
albanian-laundromat
🥈
569
48ms
2 days ago
Niven Numbers (Long)
albanian-laundromat
263
63ms
2 days ago
ISBN
albanian-laundromat
367
12ms
2 days ago
Intersection
albanian-laundromat
🥉
449
14ms
2 days ago
Tic-tac-toe
albanian-laundromat
🥈
392
15ms
2 days ago
Lucky Numbers
albanian-laundromat
344
3,128ms
2 days ago
Catalan Numbers
albanian-laundromat
🥈
564
23ms
2 days ago
Game of Life
albanian-laundromat
💎
373
11ms
2 days ago
Trinomial Triangle
albanian-laundromat
💎
284
12ms
2 days ago
Recamán
albanian-laundromat
🥉
224
12ms
2 days ago
Evil Numbers
snoozingnewt
110
12ms
2 days ago
Odious Numbers
snoozingnewt
113
11ms
2 days ago
Emirp Numbers
snoozingnewt
176
11ms
2 days ago
Happy Numbers
snoozingnewt
147
11ms
2 days ago
Abundant Numbers
snoozingnewt
203
11ms
2 days ago
Prime Numbers
snoozingnewt
111
11ms
2 days ago
Collatz
albanian-laundromat
230
121ms
2 days ago
Tower of Hanoi
albanian-laundromat
💎
220
13ms
2 days ago
Star Wars GPT
albanian-laundromat
🦄
949
19ms
2 days ago
Intersection
frankgraziano
🥈
306
12ms
2 days ago
Cubes
HumanoidCPU
5,034
13ms
3 days ago
Diamonds
HumanoidCPU
1,850
12ms
3 days ago
Rule 110
HumanoidCPU
16,733
18ms
3 days ago
Kolakoski Constant
HumanoidCPU
1,086
12ms
3 days ago
Catalan’s Constant
HumanoidCPU
1,086
12ms
3 days ago
24 Game
HumanoidCPU
12,502
19ms
3 days ago
12 Days of Christmas
HumanoidCPU
2,507
13ms
3 days ago
99 Bottles of Beer
HumanoidCPU
12,652
18ms
3 days ago
Factorial Factorisation
HumanoidCPU
924
11ms
3 days ago
√2
HumanoidCPU
1,086
13ms
3 days ago
φ
HumanoidCPU
1,086
12ms
3 days ago
π
HumanoidCPU
1,086
11ms
3 days ago
τ
HumanoidCPU
1,086
12ms
3 days ago
λ
HumanoidCPU
1,086
12ms
3 days ago
𝑒
HumanoidCPU
1,086
12ms
3 days ago
Kolakoski Sequence
HumanoidCPU
2,113
12ms
3 days ago
ln 2
HumanoidCPU
1,086
12ms
3 days ago
γ
HumanoidCPU
1,086
12ms
3 days ago
Apéry’s Constant
HumanoidCPU
1,087
11ms
3 days ago
Trinomial Triangle
HumanoidCPU
2,195
12ms
3 days ago
Niven Numbers
snoozingnewt
131
11ms
3 days ago
Arithmetic Numbers
HumanoidCPU
99,376
187ms
3 days ago
Tower of Hanoi
msbranicky
3,654
13ms
3 days ago
Pernicious Numbers
snoozingnewt
140
11ms
4 days ago
Tower of Hanoi
CaedenHarper
3,806
12ms
5 days ago
Tower of Hanoi
JOrE20
8,828
14ms
6 days ago
PalindromemordnilaP
primo-ppcg
💎
232
140ms
6 days ago
Sphenic Numbers
HumanoidCPU
23,338
29ms
6 days ago
Tower of Hanoi
emgordon154
3,630
13ms
7 days ago
Tower of Hanoi
KatieLG
3,617
14ms
7 days ago
Tower of Hanoi
frankgraziano
2,104
13ms
8 days ago
Fractions
albanian-laundromat
320
315ms
9 days ago
Tower of Hanoi
dokutan
🥉
357
12ms
9 days ago
Taxicab Numbers
HumanoidCPU
8,556
15ms
9 days ago
Fibonacci
Andrey2001
202
11ms
10 days ago
Ten-pin Bowling
AidanWalter
8,671
23ms
11 days ago
ISBN
AidanWalter
1,230
13ms
11 days ago
Zodiac Signs
albanian-laundromat
🥉
479
14ms
12 days ago
Pangram Grep
albanian-laundromat
🥉
335
13ms
12 days ago
γ
albanian-laundromat
🥈
737
13ms
12 days ago
Tutorial
JOrE20
186
13ms
12 days ago
Prime Numbers (Long)
albanian-laundromat
252
1,366ms
12 days ago
Card Number Validation
albanian-laundromat
🥉
315
13ms
12 days ago
Billiards
albanian-laundromat
🥈
522
24ms
12 days ago
Ten-pin Bowling
BREMAUCY
944
12ms
13 days ago
SI Units
albanian-laundromat
🥈
1,361
25ms
13 days ago
Smooth Numbers
albanian-laundromat
335
410ms
14 days ago
Tower of Hanoi
MeWhenI
🥈
222
15ms
14 days ago
Divisors
albanian-laundromat
245
12ms
17 days ago
Divisors
dokutan
248
18ms
18 days ago