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
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
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
Partition Numbers
QR Encoder
Quadratic Formula
Scrambled Alphabetization
Semiprime Numbers
Set
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
Rockstar 2
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
Rockstar 2
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
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
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
Partition Numbers
QR Encoder
Quadratic Formula
Scrambled Alphabetization
Semiprime Numbers
Set
Snake
Sphenic Numbers
Star Wars GPT
Trinomial Triangle
Turtle
Tutorial
Hole
Golfer
Chars
Submitted
Prime Numbers
acotis
113
4 days ago
Number Spiral
BREMAUCY
343
4 days ago
ASCII Table
BREMAUCY
330
4 days ago
Tutorial
BREMAUCY
235
4 days ago
Tutorial
targrik
386
8 days ago
ISBN
BREMAUCY
380
8 days ago
Morse Encoder
MeWhenI
🥈
594
12 days ago
Niven Numbers (Long)
MeWhenI
292
12 days ago
Abundant Numbers
Shanethegamer
203
19 days ago
Tutorial
CaedenHarper
237
20 days ago
Hilbert Curve
HumanoidCPU
2,088
23 days ago
Prime Numbers
KasperKivimaeki
287
25 days ago
Highly Composite Numbers
HumanoidCPU
432
26 days ago
Quine
CaedenHarper
254
26 days ago
Tic-tac-toe
MeWhenI
🦄
437
26 days ago
QR Decoder
MeWhenI
🥈
623
26 days ago
Lucky Numbers
CaedenHarper
331
26 days ago
Fizz Buzz
CaedenHarper
285
25 Jan 2025
Cubes
CaedenHarper
3,527
25 Jan 2025
Diamonds
CaedenHarper
1,671
25 Jan 2025
Rule 110
CaedenHarper
10,734
25 Jan 2025
Christmas Trees
CaedenHarper
909
25 Jan 2025
Sierpiński Triangle
CaedenHarper
522
25 Jan 2025
Tutorial
DialFrost
234
25 Jan 2025
Farey Sequence
primo-ppcg
💎
224
25 Jan 2025
Catalan Numbers
CaedenHarper
2,926
24 Jan 2025
Number Spiral
CaedenHarper
367
24 Jan 2025
Kolakoski Sequence
CaedenHarper
2,049
24 Jan 2025
99 Bottles of Beer
CaedenHarper
12,128
24 Jan 2025
12 Days of Christmas
CaedenHarper
2,475
24 Jan 2025
Tongue-twisters
CaedenHarper
568
24 Jan 2025
ASCII Table
CaedenHarper
346
24 Jan 2025
Factorial Factorisation
CaedenHarper
🥈
905
24 Jan 2025
φ
CaedenHarper
1,044
24 Jan 2025
γ
CaedenHarper
🥈
1,036
24 Jan 2025
√2
CaedenHarper
🥉
1,044
24 Jan 2025
𝑒
CaedenHarper
1,044
24 Jan 2025
λ
CaedenHarper
1,044
24 Jan 2025
π
CaedenHarper
1,044
24 Jan 2025
τ
CaedenHarper
1,044
24 Jan 2025
Kolakoski Constant
CaedenHarper
🥉
1,044
24 Jan 2025
ln 2
CaedenHarper
1,044
24 Jan 2025
Catalan’s Constant
CaedenHarper
🥉
1,044
24 Jan 2025
Kaprekar Numbers
DialFrost
🥇
480
24 Jan 2025
Ascending Primes
CaedenHarper
🥉
552
24 Jan 2025
Gijswijt’s Sequence
CaedenHarper
2,040
24 Jan 2025
Emirp Numbers (Long)
CaedenHarper
1,196
24 Jan 2025
Leyland Numbers
CaedenHarper
926
24 Jan 2025
Niven Numbers (Long)
CaedenHarper
7,478
24 Jan 2025
Pascal’s Triangle
CaedenHarper
809
24 Jan 2025
Evil Numbers (Long)
CaedenHarper
1,990
24 Jan 2025
Pernicious Numbers (Long)
CaedenHarper
20,708
24 Jan 2025
Recamán
CaedenHarper
937
24 Jan 2025
Collatz
CaedenHarper
3,266
24 Jan 2025
Van Eck Sequence
CaedenHarper
2,595
24 Jan 2025
Odious Numbers (Long)
CaedenHarper
1,985
24 Jan 2025
Leap Years
CaedenHarper
770
24 Jan 2025
Divisors
CaedenHarper
1,206
24 Jan 2025
Abundant Numbers (Long)
CaedenHarper
1,004
24 Jan 2025
Niven Numbers
CaedenHarper
🥇
131
24 Jan 2025
Fibonacci
CaedenHarper
174
24 Jan 2025
Foo Fizz Buzz Bar
CaedenHarper
5,759
24 Jan 2025
Inventory Sequence
CaedenHarper
2,663
24 Jan 2025
Prime Numbers
CaedenHarper
🥇
111
24 Jan 2025
Evil Numbers
CaedenHarper
🥇
110
24 Jan 2025
Odious Numbers
CaedenHarper
🥇
113
24 Jan 2025
Pernicious Numbers
CaedenHarper
🥇
140
24 Jan 2025
Smith Numbers
CaedenHarper
1,864
24 Jan 2025
Arithmetic Numbers
CaedenHarper
37,694
24 Jan 2025
Happy Numbers
CaedenHarper
🥇
147
24 Jan 2025
Emirp Numbers
CaedenHarper
🥇
176
24 Jan 2025
Happy Numbers (Long)
CaedenHarper
592
24 Jan 2025
Prime Numbers (Long)
CaedenHarper
5,988
24 Jan 2025
Vampire Numbers
CaedenHarper
🥉
1,111
24 Jan 2025
Look and Say
CaedenHarper
1,319
24 Jan 2025