Recent Solutions
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
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
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Tower of Hanoi
Turtle
Tutorial
All Languages
><>
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Common Lisp
Crystal
D
Dart
Elixir
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
Erlang
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
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
Erlang
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
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
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Tower of Hanoi
Turtle
Tutorial
Hole
Golfer
Bytes
Time
Submitted
Collatz
Blockyheadman
114
3ms
85 mins ago
Mahjong
KasperKivimaeki
💎
201
3ms
3 hours ago
12 Days of Christmas
luuumine
545
2ms
6 hours ago
Levenshtein Distance
Babafaba
273
2ms
11 hours ago
Mahjong
ovs-code
🥈
213
2ms
19 hours ago
Pernicious Numbers (Long)
iczelia
83
4ms
19 hours ago
Arrows
dokutan
126
3ms
22 hours ago
Abundant Numbers
6512345
76
2ms
23 hours ago
Fibonacci
ansgustjd
47
2ms
23 hours ago
Lucky Numbers
ansgustjd
110
19ms
24 hours ago
Fizz Buzz
Blockyheadman
123
2ms
25 hours ago
Odious Numbers (Long)
Blockyheadman
114
2ms
25 hours ago
Abundant Numbers (Long)
Blockyheadman
118
3ms
25 hours ago
Abundant Numbers
Blockyheadman
99
2ms
26 hours ago
Tower of Hanoi
saito-ta
66
2ms
28 hours ago
99 Bottles of Beer
luuumine
347
2ms
32 hours ago
Happy Numbers (Long)
CaedenHarper
99
2ms
36 hours ago
Reverse Polish Notation
gigaprofisi
406
2ms
43 hours ago
Tutorial
6512345
96
3ms
46 hours ago
Pangram Grep
Blockyheadman
165
2ms
2 days ago
Tower of Hanoi
Shanethegamer
70
2ms
2 days ago
Rijndael S-box
snoozingnewt
224
2ms
2 days ago
Fibonacci
deglebe
56
2ms
2 days ago
Quine
ovs-code
66
2ms
2 days ago
𝑒
JOrE20
1,040
2ms
3 days ago
Tower of Hanoi
GolfingSuccess
65
2ms
3 days ago
Forsyth–Edwards Notation
JayXon
💎
107
2ms
3 days ago
Forsyth–Edwards Notation
KasperKivimaeki
🥈
109
2ms
3 days ago
ROT13
snoozingnewt
141
4ms
4 days ago
ASCII Table
Adix-null
164
2ms
4 days ago
Fizz Buzz
BREMAUCY
75
2ms
4 days ago
Rijndael S-box
BREMAUCY
329
2ms
5 days ago
Tower of Hanoi
bitsandbeyond
65
2ms
5 days ago
Minesweeper
KasperKivimaeki
💎
131
10ms
5 days ago
Minesweeper
ovs-code
🥈
141
7ms
5 days ago
Gray Code Decoder
KasperKivimaeki
79
3ms
5 days ago
Evil Numbers
miabea73
66
2ms
5 days ago
Odious Numbers
miabea73
64
2ms
5 days ago
Divisors
prestosilver
71
2ms
5 days ago
Vampire Numbers
prestosilver
233
1,705ms
5 days ago
Tutorial
prestosilver
101
3ms
5 days ago
Odious Numbers (Long)
prestosilver
78
2ms
5 days ago
Odious Numbers
prestosilver
70
2ms
5 days ago
Fizz Buzz
prestosilver
89
2ms
5 days ago
Foo Fizz Buzz Bar
prestosilver
136
2ms
5 days ago
Fibonacci
prestosilver
54
2ms
5 days ago
Evil Numbers (Long)
prestosilver
78
2ms
5 days ago
Evil Numbers
prestosilver
69
2ms
5 days ago
99 Bottles of Beer
prestosilver
281
2ms
5 days ago
Tutorial
ToE42
114
3ms
5 days ago
Fractions
snoozingnewt
247
2ms
5 days ago
Arabic to Roman
prestosilver
177
10ms
6 days ago
Time Distance
KasperKivimaeki
280
2ms
6 days ago
Abundant Numbers
webmiche
80
2ms
6 days ago
Tower of Hanoi
ovs-code
65
2ms
6 days ago
Foo Fizz Buzz Bar
retrohun
138
3ms
6 days ago
Fizz Buzz
luuumine
77
2ms
6 days ago
Tower of Hanoi
stefangimmillaro
65
2ms
6 days ago
Minesweeper
emgordon154
🥉
156
7ms
6 days ago
Set
snoozingnewt
368
3ms
6 days ago
Tower of Hanoi
sean-niemann
66
2ms
6 days ago
Tower of Hanoi
KasperKivimaeki
66
2ms
6 days ago
Tutorial
Openstreetmapler
276
2ms
6 days ago
Tower of Hanoi
rucin93
66
2ms
7 days ago
Prime Numbers
solisolu
77
2ms
7 days ago
Fractions
solisolu
136
2ms
7 days ago
Fibonacci
albanian-laundromat
74
2ms
7 days ago
Kolakoski Sequence
snoozingnewt
121
2ms
7 days ago
N Queens
CatsAreFluffy
165
365ms
7 days ago
Christmas Trees
Blockyheadman
203
2ms
8 days ago
Divisors
Maximizer02
89
2ms
8 days ago
Foo Fizz Buzz Bar
KasperKivimaeki
🥈
102
5ms
8 days ago
Leap Years
luuumine
59
2ms
8 days ago
Kolakoski Sequence
luuumine
109
3ms
9 days ago
Abundant Numbers
luuumine
78
3ms
9 days ago