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
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
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
Minesweeper
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
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
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
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
Minesweeper
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Turtle
Tutorial
Hole
Golfer
Chars
Submitted
Hexdump
bitsandbeyond
💎
90
4 hours ago
Arithmetic Numbers
snoozingnewt
130
15 hours ago
QR Decoder
bitsandbeyond
💎
94
19 hours ago
Maze
bitsandbeyond
💎
92
20 hours ago
Reverse Polish Notation
bitsandbeyond
🥈
69
20 hours ago
Pernicious Numbers
snoozingnewt
79
25 hours ago
Pernicious Numbers (Long)
snoozingnewt
83
25 hours ago
Prime Numbers
snoozingnewt
43
41 hours ago
Collatz
snoozingnewt
76
46 hours ago
ASCII Table
bitsandbeyond
💎
72
3 days ago
Hilbert Curve
bitsandbeyond
🥈
145
3 days ago
Intersection
bitsandbeyond
💎
85
3 days ago
Jacobi Symbol
bitsandbeyond
💎
89
3 days ago
Kolakoski Constant
bitsandbeyond
💎
73
3 days ago
Mahjong
bitsandbeyond
🥈
140
3 days ago
Minesweeper
bitsandbeyond
89
3 days ago
p-adic Expansion
bitsandbeyond
118
3 days ago
Repeating Decimals
bitsandbeyond
💎
97
3 days ago
Snake
bitsandbeyond
94
3 days ago
Ten-pin Bowling
bitsandbeyond
🥈
95
3 days ago
Tongue-twisters
bitsandbeyond
🥇
157
3 days ago
Topological Sort
bitsandbeyond
🥈
87
3 days ago
Highly Composite Numbers
bitsandbeyond
91
3 days ago
Hexagonal Spiral
bitsandbeyond
90
3 days ago
Gijswijt’s Sequence
bitsandbeyond
72
3 days ago
Floyd-Steinberg Dithering
bitsandbeyond
112
3 days ago
Factorial Factorisation
bitsandbeyond
🥇
79
3 days ago
Ellipse Perimeters
bitsandbeyond
81
3 days ago
DFA Simulator
bitsandbeyond
💎
99
3 days ago
Catalan’s Constant
bitsandbeyond
🥈
74
3 days ago
Calendar
bitsandbeyond
108
3 days ago
Billiards
bitsandbeyond
💎
96
3 days ago
Apéry’s Constant
bitsandbeyond
73
3 days ago
United States
bitsandbeyond
🥉
86
3 days ago
Catalan Numbers
bitsandbeyond
33
3 days ago
Forsyth–Edwards Notation
bitsandbeyond
💎
79
3 days ago
Trinomial Triangle
dokutan
🥉
2,068
4 days ago
Prime Numbers (Long)
snoozingnewt
75
4 days ago
Rijndael S-box
bitsandbeyond
💎
87
5 days ago
Emojify
bitsandbeyond
💎
78
5 days ago
Pascal’s Triangle
bitsandbeyond
43
5 days ago
Lucky Tickets
bitsandbeyond
88
5 days ago
Pascal’s Triangle
SirBogman
🥈
41
6 days ago
Pernicious Numbers
Yax42
34
6 days ago
Foo Fizz Buzz Bar
bitsandbeyond
🥈
69
6 days ago
Kaprekar Numbers
bitsandbeyond
💎
103
6 days ago
Trinomial Triangle
SirBogman
💎
51
6 days ago
Fizz Buzz
snoozingnewt
🥇
42
6 days ago
Fibonacci
snoozingnewt
29
6 days ago
Day of Week
snoozingnewt
🥇
16
6 days ago
Gray Code Decoder
kg583
46
7 days ago
Intersection
snoozingnewt
217
7 days ago
Trinomial Triangle
snoozingnewt
🥈
86
9 days ago
Divisors
snoozingnewt
43
9 days ago
Trinomial Triangle
CaedenHarper
🥉
2,068
10 days ago
Fibonacci
albanian-laundromat
62
10 days ago
Niven Numbers (Long)
snoozingnewt
54
10 days ago
Niven Numbers
snoozingnewt
53
10 days ago
Recamán
snoozingnewt
239
15 days ago
Partition Numbers
snoozingnewt
60
16 days ago
CSS Colors
pardouin
71
19 days ago
Catalan Numbers
fuzzylojik-golf
34
19 days ago
Leap Years
pardouin
🥇
26
20 days ago
Fibonacci
Maximizer02
63
23 days ago
Hilbert Curve
SirBogman
💎
132
23 days ago
Tutorial
snoozingnewt
26
25 days ago
Odious Numbers (Long)
snoozingnewt
55
25 days ago
Odious Numbers
snoozingnewt
54
25 days ago
Evil Numbers (Long)
snoozingnewt
53
25 days ago
Evil Numbers
snoozingnewt
52
25 days ago
Happy Numbers (Long)
snoozingnewt
85
26 days ago
Happy Numbers
snoozingnewt
85
26 days ago
Tutorial
frederni
44
11 Sep 2025
Gray Code Encoder
DialFrost
51
8 Sep 2025
Niven Numbers
IISResetMe
39
8 Sep 2025