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 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 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
Star Wars GPT
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 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 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
Star Wars GPT
Trinomial Triangle
Turtle
Tutorial
Hole
Golfer
Bytes
Submitted
Set
stefangimmillaro
🥈
240
12 hours ago
ASCII Table
sean-niemann
186
18 hours ago
Niven Numbers (Long)
DialFrost
🥇
117
19 hours ago
Sudoku
Jacob385
1,524
25 hours ago
Semiprime Numbers
yoshykai
191
25 hours ago
brainfuck
yoshykai
363
27 hours ago
Christmas Trees
yoshykai
164
28 hours ago
ROT13
yoshykai
183
28 hours ago
Set
yoshykai
371
28 hours ago
Farey Sequence
yoshykai
307
29 hours ago
Diamonds
DrJoWe
263
35 hours ago
Medal Tally
yoshykai
244
2 days ago
Fractions
yoshykai
207
2 days ago
Niven Numbers (Long)
yoshykai
130
2 days ago
Kolakoski Sequence
yoshykai
185
2 days ago
Roman to Arabic
dokutan
179
3 days ago
Reverse Polish Notation
yoshykai
329
3 days ago
Ordinal Numbers
yoshykai
182
3 days ago
Seven Segment
yoshykai
313
3 days ago
Number Spiral
yoshykai
287
3 days ago
Lucky Tickets
yoshykai
250
3 days ago
Rule 110
yoshykai
228
3 days ago
Sierpiński Triangle
yoshykai
348
3 days ago
99 Bottles of Beer
yoshykai
373
3 days ago
United States
DihydrogenMonoxideH2O
1,096
3 days ago
24 Game
DihydrogenMonoxideH2O
1,404
3 days ago
Seven Segment
dokutan
525
4 days ago
Pangram Grep
chartung17
145
4 days ago
𝑒
JayXon
🥈
154
4 days ago
Arabic to Roman
dokutan
855
5 days ago
Fibonacci
albanian-laundromat
115
6 days ago
Set
MeWhenI
🥉
272
6 days ago
Trinomial Triangle
yoshykai
242
7 days ago
Maze
Jacob385
491
8 days ago
Emojify
coltraloz
232
8 days ago
brainfuck
KasperKivimaeki
🥉
238
9 days ago
brainfuck
Jacob385
384
10 days ago
Abundant Numbers
Jacob385
128
10 days ago
Abundant Numbers (Long)
Jacob385
128
10 days ago
Tutorial
retrohun
323
10 days ago
Partition Numbers
dokutan
182
10 days ago
Foo Fizz Buzz Bar
TeodorDyakov
325
10 days ago
Set
Jacob385
297
11 days ago
United States
yoshykai
613
11 days ago
Recamán
yoshykai
136
11 days ago
Van Eck Sequence
yoshykai
135
11 days ago
Look and Say
yoshykai
251
11 days ago
Abundant Numbers
yoshykai
130
11 days ago
Niven Numbers
yoshykai
130
11 days ago
Prime Numbers (Long)
yoshykai
114
11 days ago
Prime Numbers
yoshykai
113
11 days ago
Recamán
dokutan
215
12 days ago
π
yoshykai
1,056
12 days ago
Emirp Numbers
yoshykai
215
12 days ago
Emirp Numbers (Long)
yoshykai
217
12 days ago
Card Number Validation
yoshykai
196
12 days ago
Set
error256
💎
214
12 days ago
Tic-tac-toe
yoshykai
268
12 days ago
Partition Numbers
yoshykai
198
12 days ago
Quine
yoshykai
🥇
160
12 days ago
Set
ravnskjaer
615
12 days ago
12 Days of Christmas
yoshykai
583
12 days ago
Diamonds
yoshykai
169
12 days ago
π
DialFrost
223
12 days ago
Billiards
ravnskjaer
685
13 days ago
Happy Numbers
yoshykai
188
13 days ago
Evil Numbers (Long)
yoshykai
111
13 days ago
Fibonacci
yoshykai
97
13 days ago
24 Game
ravnskjaer
1,139
13 days ago
Factorial Factorisation
yoshykai
180
13 days ago
Ascending Primes
yoshykai
229
13 days ago
Collatz
Chinay-Domitrix
149
13 days ago
Leyland Numbers
yoshykai
240
13 days ago
Odious Numbers (Long)
yoshykai
109
13 days ago
Odious Numbers
yoshykai
108
13 days ago