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
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
Maze
Medal Tally
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
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
Transpose Sentence
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Apéry’s Constant
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
Hilbert Curve
Mandelbrot
Minesweeper
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
QR Encoder
Quadratic Formula
Scrambled Alphabetization
Semiprime Numbers
Snake
Sphenic Numbers
Trinomial Triangle
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
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
Groovy
Harbour
Hare
Haxe
Hush
Hy
iogii
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
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
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
Groovy
Harbour
Hare
Haxe
Hush
Hy
iogii
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
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
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
Maze
Medal Tally
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
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
Transpose Sentence
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Experimental Hole
Apéry’s Constant
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
Hilbert Curve
Mandelbrot
Minesweeper
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
QR Encoder
Quadratic Formula
Scrambled Alphabetization
Semiprime Numbers
Snake
Sphenic Numbers
Trinomial Triangle
Turtle
Tutorial
Hole
Golfer
Chars
Submitted
Fibonacci
plcc0
🥇
51
6 days ago
Star Wars GPT
ovs-code
🦄
183
7 days ago
Rule 110
sean-niemann
🥉
96
7 days ago
Gray Code Encoder
GolfingSuccess
46
8 days ago
Levenshtein Distance
keelimeguy
533
9 days ago
Lucky Numbers
DialFrost
142
13 days ago
Reversi
error256
🥉
106
15 days ago
United States
dokutan
329
17 days ago
Seven Segment
dokutan
190
17 days ago
ROT13
dokutan
💎
109
17 days ago
Roman to Arabic
dokutan
99
17 days ago
Recamán
dokutan
133
17 days ago
Prime Numbers (Long)
dokutan
90
17 days ago
Partition Numbers
dokutan
🥈
133
17 days ago
Levenshtein Distance
dokutan
503
17 days ago
Fractions
dokutan
119
17 days ago
Collatz
dokutan
99
17 days ago
Billiards
dokutan
🥈
278
17 days ago
Arabic to Roman
dokutan
116
17 days ago
Morse Encoder
dokutan
🥈
422
17 days ago
Morse Decoder
dokutan
🥉
370
17 days ago
Forsyth–Edwards Notation
dokutan
203
17 days ago
Set
error256
🥈
182
19 days ago
Trinomial Triangle
KatieLG
2,073
20 days ago
Sphenic Numbers
KatieLG
8,866
20 days ago
Semiprime Numbers
KatieLG
12,795
20 days ago
Odd Polyomino Tiling
KatieLG
21,437
20 days ago
Minesweeper
KatieLG
22,559
20 days ago
Mandelbrot
KatieLG
3,368
20 days ago
Hilbert Curve
KatieLG
2,054
20 days ago
Highly Composite Numbers
KatieLG
398
20 days ago
Hexagonal Spiral
KatieLG
1,341
20 days ago
Floyd-Steinberg Dithering
KatieLG
54,531
20 days ago
Flags
KatieLG
4,105
20 days ago
Tic-tac-toe
KatieLG
15,419
22 days ago
Tutorial
emgordon154
66
23 days ago
Spelling Numbers
dokutan
4,568
26 days ago
Tutorial
CaedenHarper
47
18 Apr 2025
Tutorial
HumanoidCPU
47
18 Apr 2025
Mandelbrot
Shanethegamer
3,368
18 Apr 2025
Hilbert Curve
Shanethegamer
2,054
18 Apr 2025
Tutorial
Shanethegamer
47
17 Apr 2025
Tutorial
DialFrost
47
17 Apr 2025
Arabic to Roman
DialFrost
💎
101
16 Apr 2025
Odious Numbers
rucin93
49
14 Apr 2025
Odious Numbers (Long)
sean-niemann
🥇
50
13 Apr 2025
Hilbert Curve
HumanoidCPU
2,054
13 Apr 2025
Set
ovs-code
💎
159
10 Apr 2025
Inventory Sequence
ehulinsky
127
7 Apr 2025
Fibonacci
albanian-laundromat
94
5 Apr 2025
PalindromemordnilaP
ehulinsky
🥉
122
3 Apr 2025
Tic-tac-toe
ehulinsky
241
3 Apr 2025
N Queens
ehulinsky
1,252
2 Apr 2025
Polyominoes
ehulinsky
3,570
2 Apr 2025
Card Number Validation
ehulinsky
🥉
158
2 Apr 2025
Reverse Polish Notation
ehulinsky
216
2 Apr 2025
Tutorial
retrohun
150
1 Apr 2025
Pascal’s Triangle
dokutan
101
1 Apr 2025
Catalan Numbers
dokutan
69
1 Apr 2025
12 Days of Christmas
ehulinsky
1,958
29 Mar 2025
Number Spiral
ehulinsky
306
29 Mar 2025
Christmas Trees
ehulinsky
150
29 Mar 2025
Cubes
ehulinsky
🥈
277
29 Mar 2025
Quine
ehulinsky
41
26 Mar 2025
Catalan’s Constant
ehulinsky
1,009
26 Mar 2025
Foo Fizz Buzz Bar
ehulinsky
131
26 Mar 2025
Gijswijt’s Sequence
ehulinsky
2,006
26 Mar 2025
ln 2
ehulinsky
1,009
26 Mar 2025
Partition Numbers
ehulinsky
🥉
653
26 Mar 2025
Kaprekar Numbers
ehulinsky
446
26 Mar 2025
Farey Sequence
ehulinsky
4,360
26 Mar 2025
Ascending Primes
ehulinsky
518
26 Mar 2025
Rijndael S-box
ehulinsky
774
26 Mar 2025
λ
ehulinsky
1,009
26 Mar 2025
Prime Numbers
ehulinsky
66
26 Mar 2025