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
Fractions
maweowo
41
10 hours ago
Fizz Buzz
snoozingnewt
35
17 hours ago
Fibonacci
CornerMercury
14
29 hours ago
Forsyth–Edwards Notation
maweowo
63
2 days ago
Pascal’s Triangle
wleightond
24
2 days ago
Prime Numbers
wleightond
15
2 days ago
Niven Numbers
HumanoidCPU
156
3 days ago
Niven Numbers (Long)
ndren
38
3 days ago
Emojify
evnu
182
3 days ago
Trinomial Triangle
wleightond
24
4 days ago
Highly Composite Numbers
wleightond
394
4 days ago
Game of Life
wleightond
43
4 days ago
Reverse Polish Notation
maweowo
52
4 days ago
ISBN
maweowo
40
5 days ago
Intersection
maweowo
36
5 days ago
Factorial Factorisation
maweowo
36
5 days ago
Leyland Numbers
maweowo
20
7 days ago
Gijswijt’s Sequence
maweowo
33
7 days ago
Diamonds
maweowo
36
7 days ago
Odious Numbers
maweowo
13
8 days ago
Maze
maweowo
69
8 days ago
Card Number Validation
maweowo
39
8 days ago
Transpose Sentence
maweowo
34
8 days ago
Farey Sequence
maweowo
31
8 days ago
Inventory Sequence
maweowo
24
8 days ago
Emirp Numbers
maweowo
26
8 days ago
Emirp Numbers (Long)
maweowo
26
8 days ago
Happy Numbers (Long)
maweowo
23
8 days ago
Happy Numbers
maweowo
22
8 days ago
Look and Say
maweowo
19
8 days ago
Prime Numbers
ovs-code
13
8 days ago
Smith Numbers
evnu
40
8 days ago
Divisors
maweowo
25
9 days ago
Prime Numbers (Long)
maweowo
13
9 days ago
Prime Numbers
maweowo
12
9 days ago
Leap Years
maweowo
22
9 days ago
Lucky Numbers
maweowo
26
9 days ago
Collatz
maweowo
25
9 days ago
Scrambled Sort
maweowo
30
9 days ago
Trinomial Triangle
maweowo
23
9 days ago
Divisors
ovs-code
24
9 days ago
Look and Say
ovs-code
20
9 days ago
Sierpiński Triangle
ovs-code
26
9 days ago
Pascal’s Triangle
ovs-code
23
9 days ago
Ascending Primes
ovs-code
28
9 days ago
Niven Numbers (Long)
maweowo
20
9 days ago
Pascal’s Triangle
maweowo
23
9 days ago
Pangram Grep
maweowo
20
9 days ago
Ascending Primes
maweowo
26
9 days ago
Arithmetic Numbers
evnu
39
10 days ago
Trinomial Triangle
ovs-code
23
10 days ago
Trinomial Triangle
KatieLG
26
10 days ago
Pascal’s Triangle
KatieLG
24
10 days ago
Abundant Numbers
evnu
25
10 days ago
Divisors
evnu
27
10 days ago
Abundant Numbers (Long)
maweowo
22
10 days ago
Odious Numbers (Long)
maweowo
14
10 days ago
Set
maweowo
34
10 days ago
Fizz Buzz
evnu
65
10 days ago
Emirp Numbers
evnu
37
10 days ago
Sierpiński Triangle
maweowo
26
10 days ago
Abundant Numbers (Long)
evnu
26
10 days ago
Smith Numbers
maweowo
29
11 days ago
ASCII Table
evnu
85
11 days ago
Abundant Numbers
maweowo
21
11 days ago
Time Distance
KatieLG
194
15 days ago
Sudoku (Fill-in)
KatieLG
208
15 days ago
Sudoku
KatieLG
648
15 days ago
Billiards
AlephSquirrel
69
16 days ago
Scrambled Sort
AlephSquirrel
31
16 days ago
Seven Segment
AlephSquirrel
57
16 days ago
Partition Numbers
Shanethegamer
749
16 days ago
Kaprekar Numbers
Shanethegamer
510
16 days ago
Highly Composite Numbers
Shanethegamer
455
16 days ago
Ascending Primes
Shanethegamer
54
16 days ago