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
Bytes
Submitted
Farey Sequence
snoozingnewt
125
2 hours ago
Leap Years
Babafaba
58
2 hours ago
Leap Years
ApoChagi
58
3 hours ago
Odious Numbers (Long)
Babafaba
57
5 hours ago
Odious Numbers
Babafaba
56
5 hours ago
Evil Numbers
Babafaba
57
5 hours ago
Evil Numbers (Long)
Babafaba
59
5 hours ago
Arithmetic Numbers
Babafaba
95
7 hours ago
Pascal’s Triangle
0dyse
189
7 hours ago
Time Distance
Mabeloid
379
7 hours ago
Christmas Trees
iczelia
121
8 hours ago
Inventory Sequence
Babafaba
78
8 hours ago
Forsyth–Edwards Notation
Yax42
153
8 hours ago
Happy Numbers
Babafaba
99
9 hours ago
Happy Numbers (Long)
Babafaba
100
9 hours ago
Abundant Numbers (Long)
iczelia
78
10 hours ago
Abundant Numbers
iczelia
77
10 hours ago
12 Days of Christmas
iczelia
592
10 hours ago
Hexdump
iczelia
334
13 hours ago
Happy Numbers
Yax42
81
13 hours ago
Evil Numbers (Long)
iczelia
67
13 hours ago
Transpose Sentence
iczelia
228
13 hours ago
Ascending Primes
Yax42
86
13 hours ago
24 Game
mukorossi77
710
16 hours ago
Quine
iczelia
72
17 hours ago
12 Days of Christmas
mukorossi77
583
23 hours ago
Smith Numbers
snoozingnewt
165
27 hours ago
Van Eck Sequence
snoozingnewt
82
29 hours ago
12 Days of Christmas
snoozingnewt
520
31 hours ago
12 Days of Christmas
aviyanp
563
32 hours ago
Kaprekar Numbers
snoozingnewt
119
32 hours ago
Day of Week
Yax42
276
33 hours ago
Look and Say
Yax42
520
33 hours ago
Inventory Sequence
snoozingnewt
130
35 hours ago
Trinomial Triangle
KasperKivimaeki
115
35 hours ago
Abundant Numbers
Sascha37
124
35 hours ago
Divisors
rucin93
68
36 hours ago
Divisors
Sascha37
114
36 hours ago
Ascending Primes
Sascha37
266
39 hours ago
Prime Numbers (Long)
Sascha37
136
39 hours ago
Emojify
KasperKivimaeki
💎
111
40 hours ago
Polyominoes
KasperKivimaeki
🥈
166
40 hours ago
Lucky Numbers
Yax42
342
42 hours ago
24 Game
rucin93
💎
249
2 days ago
Mandelbrot
snoozingnewt
182
2 days ago
Gijswijt’s Sequence
KasperKivimaeki
🥉
104
2 days ago
Pernicious Numbers
Babafaba
77
3 days ago
Divisors
Babafaba
78
3 days ago
Kaprekar Numbers
Yax42
110
3 days ago
SI Units
KasperKivimaeki
🥈
554
3 days ago
PalindromemordnilaP
iczelia
194
3 days ago
Abundant Numbers
Babafaba
83
3 days ago
Abundant Numbers (Long)
Babafaba
84
3 days ago
Prime Numbers (Long)
iczelia
60
3 days ago
Prime Numbers
iczelia
58
3 days ago
Day of Week
iczelia
213
3 days ago
Divisors
Yax42
66
3 days ago
Divisors
iczelia
69
3 days ago
Collatz
iczelia
80
3 days ago
Fizz Buzz
ElieDeBrauwer
160
3 days ago
Kaprekar Numbers
luuumine
110
3 days ago
Reverse Polish Notation
iczelia
212
3 days ago
Day of Week
Sascha37
366
4 days ago
Ordinal Numbers
Babafaba
102
4 days ago
Ordinal Numbers
ApoChagi
123
4 days ago
Factorial Factorisation
KasperKivimaeki
🥈
93
4 days ago
Collatz
luuumine
92
4 days ago
Zeckendorf Representation
iczelia
193
4 days ago
Arabic to Roman
Yax42
253
4 days ago
Niven Numbers
albanian-laundromat
54
4 days ago
Arabic to Roman
iczelia
233
4 days ago
Odious Numbers
Yax42
55
4 days ago
Pascal’s Triangle
iczelia
86
4 days ago
Farey Sequence
iczelia
104
4 days ago
Prime Numbers
Yax42
59
4 days ago