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
Chars
Time
Submitted
Quine
zgialor-lab
🥇
14
3ms
10 hours ago
γ
edsrzf
🥈
552
5ms
12 hours ago
λ
edsrzf
🥈
550
5ms
12 hours ago
λ
roelderickx
1,009
4ms
18 hours ago
Tutorial
NameRandomString
217
8ms
24 hours ago
Alphabetic Numbers
Shanethegamer
4,900
4ms
40 hours ago
Tutorial
zgialor-lab
74
4ms
4 days ago
Gray Code Encoder
zgialor-lab
🥉
87
18ms
4 days ago
Kolakoski Constant
albanian-laundromat
💎
174
47ms
4 days ago
Card Number Validation
jusaka
414
4ms
4 days ago
PalindromemordnilaP
jusaka
🥉
357
4ms
4 days ago
Fractions
jusaka
424
4ms
4 days ago
Transpose Sentence
jusaka
🥉
593
5ms
4 days ago
Day of Week
jusaka
885
5ms
4 days ago
Seven Segment
jusaka
1,333
4ms
4 days ago
Reverse Polish Notation
jusaka
69
4ms
4 days ago
Zeckendorf Representation
jusaka
464
5ms
4 days ago
brainfuck
zgialor-lab
315
6ms
4 days ago
Intersection
jusaka
185
5ms
4 days ago
Rock-paper-scissors-Spock-lizard
jusaka
1,525
4ms
4 days ago
Hilbert Curve
MeWhenI
💎
781
29ms
5 days ago
Vampire Numbers
jusaka
2,875
6ms
5 days ago
Leap Years
jusaka
1,578
7ms
5 days ago
Happy Numbers (Long)
jusaka
1,544
4ms
5 days ago
Ascending Primes
jusaka
1,117
4ms
5 days ago
Recamán
jusaka
2,082
4ms
5 days ago
Sierpiński Triangle
jusaka
467
6ms
5 days ago
N Queens
jusaka
2,994
5ms
5 days ago
Look and Say
jusaka
1,455
4ms
5 days ago
Smith Numbers
jusaka
4,595
4ms
5 days ago
Odious Numbers (Long)
jusaka
4,735
4ms
5 days ago
Evil Numbers (Long)
jusaka
4,741
6ms
5 days ago
Kolakoski Sequence
jusaka
643
4ms
5 days ago
Gijswijt’s Sequence
jusaka
383
5ms
5 days ago
12 Days of Christmas
jusaka
2,588
4ms
5 days ago
Van Eck Sequence
jusaka
4,412
7ms
5 days ago
Inventory Sequence
jusaka
4,417
6ms
5 days ago
Polyominoes
jusaka
3,256
5ms
5 days ago
Tower of Hanoi
jusaka
702
5ms
5 days ago
Alphabetic Numbers
jusaka
8,818
12ms
5 days ago
Cubes
jusaka
🥉
1,739
6ms
5 days ago
Polygon Triangulations
jusaka
4,642
4ms
5 days ago
Farey Sequence
jusaka
8,016
5ms
5 days ago
Lucky Numbers
jusaka
10,566
5ms
5 days ago
Foo Fizz Buzz Bar
jusaka
3,711
5ms
5 days ago
Prime Numbers (Long)
jusaka
12,640
6ms
5 days ago
Niven Numbers (Long)
jusaka
16,712
6ms
5 days ago
Sphenic Numbers
jusaka
20,035
6ms
5 days ago
Mandelbrot
jusaka
1,104
4ms
5 days ago
99 Bottles of Beer
jusaka
3,947
4ms
5 days ago
24 Game
jusaka
16,481
6ms
5 days ago
Semiprime Numbers
jusaka
28,727
7ms
5 days ago
Rule 110
jusaka
5,160
5ms
5 days ago
Odd Polyomino Tiling
jusaka
4,688
5ms
5 days ago
Apéry’s Constant
jusaka
1,010
4ms
5 days ago
Taxicab Numbers
jusaka
7,555
4ms
5 days ago
Hexagonal Spiral
jusaka
1,009
4ms
5 days ago
Hilbert Curve
jusaka
🥈
1,368
5ms
5 days ago
Diamonds
jusaka
313
4ms
5 days ago
Prime Numbers
jusaka
286
4ms
5 days ago
Divisors
jusaka
151
4ms
5 days ago
Collatz
jusaka
199
5ms
5 days ago
Pascal’s Triangle
jusaka
410
4ms
5 days ago
Fizz Buzz
jusaka
178
4ms
5 days ago
Fibonacci
jusaka
80
4ms
5 days ago
Catalan’s Constant
jusaka
1,013
3ms
5 days ago
Kolakoski Constant
jusaka
1,013
3ms
5 days ago
Tongue-twisters
jusaka
614
4ms
5 days ago
Pangram Grep
jusaka
493
4ms
5 days ago
ISBN
jusaka
384
4ms
5 days ago
Arithmetic Numbers
jusaka
391
18ms
5 days ago
Pernicious Numbers (Long)
jusaka
386
8ms
5 days ago
Christmas Trees
jusaka
250
4ms
5 days ago
ASCII Table
jusaka
321
4ms
5 days ago
Ordinal Numbers
jusaka
329
5ms
5 days ago
Arabic to Roman
jusaka
🥉
722
6ms
5 days ago
Roman to Arabic
jusaka
563
6ms
5 days ago
Gray Code Decoder
jusaka
🥈
320
6ms
5 days ago
Gray Code Encoder
jusaka
363
5ms
5 days ago
ROT13
jusaka
354
4ms
5 days ago