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
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
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
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
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
Chars
Time
Submitted
Highly Composite Numbers
namelessiw
44
1,290ms
4 hours ago
ISBN
namelessiw
22
148ms
5 hours ago
Card Number Validation
namelessiw
16
141ms
5 hours ago
United States
namelessiw
53
249ms
12 hours ago
Continued Fractions
namelessiw
38
148ms
12 hours ago
Transpose Sentence
namelessiw
11
378ms
15 hours ago
Reverse Polish Notation
namelessiw
6
235ms
15 hours ago
Number Spiral
namelessiw
34
144ms
16 hours ago
Collatz
namelessiw
18
870ms
16 hours ago
Partition Numbers
namelessiw
18
158ms
17 hours ago
Farey Sequence
namelessiw
22
152ms
29 hours ago
Niven Numbers
DialFrost
12
131ms
29 hours ago
Prime Numbers (Long)
DialFrost
7
134ms
30 hours ago
Prime Numbers
DialFrost
4
145ms
30 hours ago
Fibonacci
DialFrost
6
132ms
30 hours ago
Divisors
DialFrost
11
132ms
30 hours ago
Tutorial
JOrE20
14
374ms
32 hours ago
Sphenic Numbers
namelessiw
10
428ms
34 hours ago
Semiprime Numbers
namelessiw
8
288ms
34 hours ago
Diamonds
namelessiw
15
144ms
35 hours ago
99 Bottles of Beer
namelessiw
150
158ms
36 hours ago
Christmas Trees
namelessiw
24
148ms
37 hours ago
Tower of Hanoi
namelessiw
30
148ms
2 days ago
Lucky Numbers
namelessiw
22
2,460ms
2 days ago
Happy Numbers (Long)
namelessiw
11
175ms
2 days ago
Happy Numbers
namelessiw
11
159ms
2 days ago
Pascal’s Triangle
namelessiw
10
149ms
2 days ago
Sierpiński Triangle
namelessiw
26
141ms
2 days ago
Mandelbrot
namelessiw
100
3,312ms
2 days ago
Kolakoski Sequence
namelessiw
28
155ms
2 days ago
ASCII Table
namelessiw
46
167ms
2 days ago
Trinomial Triangle
namelessiw
19
147ms
2 days ago
Rule 110
namelessiw
27
146ms
2 days ago
Prime Numbers (Long)
Cube14yt
10
2,074ms
3 days ago
Prime Numbers
Cube14yt
8
139ms
3 days ago
Happy Numbers
Cube14yt
107
136ms
3 days ago
24 Game
Cube14yt
12,432
141ms
3 days ago
Rule 110
Cube14yt
10,100
135ms
3 days ago
Divisors
Cube14yt
1,166
138ms
3 days ago
Trinomial Triangle
Cube14yt
2,067
137ms
3 days ago
ASCII Table
Cube14yt
272
130ms
3 days ago
Fibonacci
Cube14yt
7
146ms
3 days ago
Kolakoski Sequence
HumanoidCPU
2,000
273ms
7 days ago
Quine
namelessiw
13
137ms
7 days ago
Intersection
namelessiw
38
143ms
7 days ago
φ
namelessiw
34
806ms
8 days ago
Tower of Hanoi
HumanoidCPU
3,577
357ms
13 days ago
Emirp Numbers (Long)
namelessiw
12
369ms
14 days ago
Emirp Numbers
namelessiw
11
345ms
14 days ago
PalindromemordnilaP
namelessiw
16
347ms
14 days ago
Leyland Numbers
namelessiw
24
339ms
14 days ago
Arithmetic Numbers
namelessiw
10
189ms
14 days ago
Abundant Numbers (Long)
namelessiw
9
337ms
15 days ago
Abundant Numbers
namelessiw
10
342ms
15 days ago
π
namelessiw
10
345ms
15 days ago
𝑒
namelessiw
10
343ms
15 days ago
Tutorial
Openstreetmapler
65
790ms
20 days ago
Tower of Hanoi
Shanethegamer
3,577
331ms
21 days ago
Gray Code Decoder
namelessiw
13
441ms
25 days ago
Zeckendorf Representation
namelessiw
22
153ms
25 days ago
Forsyth–Edwards Notation
namelessiw
56
491ms
21 Oct 2025
Ellipse Perimeters
namelessiw
20
346ms
20 Oct 2025
Gray Code Encoder
Shanethegamer
5
442ms
20 Oct 2025
Ellipse Perimeters
Shanethegamer
19
386ms
19 Oct 2025
Ascending Primes
namelessiw
9
253ms
17 Oct 2025
Foo Fizz Buzz Bar
namelessiw
27
430ms
16 Oct 2025
Fizz Buzz
namelessiw
23
388ms
16 Oct 2025
CSS Colors
namelessiw
330
217ms
15 Oct 2025
Tutorial
Babafaba
18
1,060ms
15 Oct 2025
Gray Code Encoder
namelessiw
5
160ms
13 Oct 2025
√2
namelessiw
30
1,012ms
12 Oct 2025
Levenshtein Distance
namelessiw
8
592ms
12 Oct 2025
Quine
snoozingnewt
13
382ms
12 Oct 2025
Arabic to Roman
namelessiw
4
203ms
12 Oct 2025
Roman to Arabic
namelessiw
4
555ms
12 Oct 2025