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
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
Snake
Sphenic Numbers
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
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
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
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
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
Snake
Sphenic Numbers
Trinomial Triangle
Turtle
Tutorial
Hole
Golfer
Chars
Submitted
Arithmetic Numbers
GolfingSuccess
103
7 days ago
Odd Polyomino Tiling
HumanoidCPU
21,657
19 days ago
Fibonacci
GolfingSuccess
57
21 days ago
Fizz Buzz
HumanoidCPU
532
23 days ago
Tutorial
Vexxter9
266
23 days ago
Highly Composite Numbers
HumanoidCPU
472
26 days ago
Sphenic Numbers
HumanoidCPU
10,679
26 days ago
Semiprime Numbers
HumanoidCPU
15,433
26 days ago
Trinomial Triangle
HumanoidCPU
2,106
26 days ago
Hilbert Curve
HumanoidCPU
2,099
26 days ago
Abundant Numbers (Long)
HumanoidCPU
1,229
26 days ago
Polyominoes
HumanoidCPU
4,849
26 days ago
Recamán
HumanoidCPU
1,166
26 days ago
Rule 110
HumanoidCPU
10,219
26 days ago
Number Spiral
HumanoidCPU
329
26 days ago
Rijndael S-box
HumanoidCPU
803
26 days ago
Pascal’s Triangle
HumanoidCPU
808
26 days ago
Kaprekar Numbers
HumanoidCPU
527
26 days ago
12 Days of Christmas
HumanoidCPU
2,501
26 days ago
99 Bottles of Beer
HumanoidCPU
12,203
26 days ago
Happy Numbers
HumanoidCPU
158
27 days ago
Happy Numbers (Long)
HumanoidCPU
714
27 days ago
Emirp Numbers
HumanoidCPU
191
27 days ago
Emirp Numbers (Long)
HumanoidCPU
1,415
27 days ago
Catalan Numbers
HumanoidCPU
2,991
27 days ago
Cubes
HumanoidCPU
2,957
27 days ago
Tongue-twisters
HumanoidCPU
556
27 days ago
Van Eck Sequence
HumanoidCPU
3,574
27 days ago
Vampire Numbers
HumanoidCPU
1,245
27 days ago
Abundant Numbers
HumanoidCPU
228
16 Aug 2025
Partition Numbers
HumanoidCPU
766
16 Aug 2025
Leap Years
dokutan
67
15 Aug 2025
Look and Say
HumanoidCPU
1,318
15 Aug 2025
Leyland Numbers
HumanoidCPU
1,012
15 Aug 2025
Farey Sequence
HumanoidCPU
5,148
15 Aug 2025
Niven Numbers (Long)
HumanoidCPU
8,995
14 Aug 2025
Odious Numbers
HumanoidCPU
118
11 Aug 2025
Niven Numbers
GolfingSuccess
66
10 Aug 2025
Leap Years
HumanoidCPU
895
6 Aug 2025
Tutorial
targrik
119
4 Aug 2025
Prime Numbers
HumanoidCPU
115
2 Aug 2025
Collatz
HumanoidCPU
4,245
2 Aug 2025
Ascending Primes
HumanoidCPU
631
2 Aug 2025
Fibonacci
HumanoidCPU
184
2 Aug 2025
Sierpiński Triangle
HumanoidCPU
427
2 Aug 2025
Leap Years
DialFrost
68
29 Jul 2025
Quine
GolfingSuccess
56
29 Jul 2025
Leap Years
sean-niemann
66
29 Jul 2025
Collatz
GolfingSuccess
87
29 Jul 2025
Fibonacci
DialFrost
57
29 Jul 2025
Gray Code Encoder
GolfingSuccess
118
28 Jul 2025
Tutorial
GolfingSuccess
88
28 Jul 2025
Trinomial Triangle
Shanethegamer
2,106
28 Jul 2025
Sphenic Numbers
Shanethegamer
10,679
28 Jul 2025
Semiprime Numbers
Shanethegamer
15,433
28 Jul 2025
Polygon Triangulations
Shanethegamer
4,527
28 Jul 2025
Odd Polyomino Tiling
Shanethegamer
21,657
28 Jul 2025
Hilbert Curve
Shanethegamer
2,099
28 Jul 2025
Highly Composite Numbers
Shanethegamer
472
28 Jul 2025
Hexagonal Spiral
Shanethegamer
1,389
28 Jul 2025
Apéry’s Constant
Shanethegamer
1,023
28 Jul 2025
𝑒
Shanethegamer
1,023
28 Jul 2025
√2
Shanethegamer
1,023
28 Jul 2025
φ
Shanethegamer
1,023
28 Jul 2025
τ
Shanethegamer
1,023
28 Jul 2025
π
Shanethegamer
1,023
28 Jul 2025
λ
Shanethegamer
1,023
28 Jul 2025
γ
Shanethegamer
1,023
28 Jul 2025
Van Eck Sequence
Shanethegamer
3,574
28 Jul 2025
Vampire Numbers
Shanethegamer
1,245
28 Jul 2025
Tongue-twisters
Shanethegamer
556
28 Jul 2025
Smith Numbers
Shanethegamer
2,219
28 Jul 2025
Sierpiński Triangle
Shanethegamer
427
28 Jul 2025
Rule 110
Shanethegamer
10,219
28 Jul 2025
Rijndael S-box
Shanethegamer
803
28 Jul 2025