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
Bytes
Submitted
Tutorial
targrik
105
3 days ago
Foo Fizz Buzz Bar
albanian-laundromat
169
6 days ago
Fizz Buzz
madex
110
11 days ago
Fizz Buzz
albanian-laundromat
116
17 days ago
Fizz Buzz
CaedenHarper
110
17 days ago
Tutorial
Vexxter9
282
23 days ago
Highly Composite Numbers
HumanoidCPU
420
26 days ago
Hilbert Curve
HumanoidCPU
5,146
27 days ago
Abundant Numbers (Long)
HumanoidCPU
992
27 days ago
Polyominoes
HumanoidCPU
3,592
27 days ago
Recamán
HumanoidCPU
925
27 days ago
Kaprekar Numbers
HumanoidCPU
468
27 days ago
Happy Numbers
HumanoidCPU
135
27 days ago
Happy Numbers (Long)
HumanoidCPU
580
27 days ago
Emirp Numbers (Long)
HumanoidCPU
1,184
27 days ago
Catalan Numbers
HumanoidCPU
2,900
27 days ago
Van Eck Sequence
HumanoidCPU
2,583
27 days ago
Abundant Numbers
HumanoidCPU
191
16 Aug 2025
Look and Say
HumanoidCPU
1,307
15 Aug 2025
Farey Sequence
HumanoidCPU
4,382
15 Aug 2025
Diamonds
HumanoidCPU
1,131
15 Aug 2025
Niven Numbers
HumanoidCPU
119
14 Aug 2025
Lucky Numbers
HumanoidCPU
4,848
14 Aug 2025
Inventory Sequence
HumanoidCPU
2,651
14 Aug 2025
Gijswijt’s Sequence
HumanoidCPU
2,028
14 Aug 2025
Smith Numbers
HumanoidCPU
1,852
14 Aug 2025
Arithmetic Numbers
HumanoidCPU
37,670
14 Aug 2025
Odious Numbers (Long)
HumanoidCPU
1,973
14 Aug 2025
Evil Numbers (Long)
HumanoidCPU
1,978
14 Aug 2025
N Queens
HumanoidCPU
1,274
14 Aug 2025
Pernicious Numbers (Long)
HumanoidCPU
20,690
14 Aug 2025
Divisors
HumanoidCPU
1,194
14 Aug 2025
Foo Fizz Buzz Bar
HumanoidCPU
5,747
14 Aug 2025
Prime Numbers (Long)
HumanoidCPU
5,976
14 Aug 2025
𝑒
HumanoidCPU
1,031
14 Aug 2025
√2
HumanoidCPU
1,031
14 Aug 2025
φ
HumanoidCPU
1,031
14 Aug 2025
τ
HumanoidCPU
1,031
14 Aug 2025
π
HumanoidCPU
1,031
14 Aug 2025
λ
HumanoidCPU
1,031
14 Aug 2025
γ
HumanoidCPU
1,031
14 Aug 2025
Vampire Numbers
HumanoidCPU
1,099
14 Aug 2025
Tongue-twisters
HumanoidCPU
551
14 Aug 2025
Sierpiński Triangle
HumanoidCPU
582
14 Aug 2025
Rule 110
HumanoidCPU
15,880
14 Aug 2025
Prime Numbers
HumanoidCPU
99
14 Aug 2025
Pernicious Numbers
HumanoidCPU
128
14 Aug 2025
Partition Numbers
HumanoidCPU
675
14 Aug 2025
Number Spiral
HumanoidCPU
328
14 Aug 2025
Mandelbrot
HumanoidCPU
10,032
14 Aug 2025
ln 2
HumanoidCPU
1,031
14 Aug 2025
Leyland Numbers
HumanoidCPU
914
14 Aug 2025
Leap Years
HumanoidCPU
758
14 Aug 2025
Kolakoski Constant
HumanoidCPU
1,031
14 Aug 2025
Fibonacci
HumanoidCPU
69
14 Aug 2025
Factorial Factorisation
HumanoidCPU
890
14 Aug 2025
Evil Numbers
HumanoidCPU
98
14 Aug 2025
Emirp Numbers
HumanoidCPU
164
14 Aug 2025
Collatz
HumanoidCPU
3,254
14 Aug 2025
Catalan’s Constant
HumanoidCPU
1,031
14 Aug 2025
Cubes
HumanoidCPU
4,129
14 Aug 2025
Christmas Trees
HumanoidCPU
573
14 Aug 2025
Ascending Primes
HumanoidCPU
540
14 Aug 2025
99 Bottles of Beer
HumanoidCPU
11,913
14 Aug 2025
24 Game
HumanoidCPU
12,460
14 Aug 2025
12 Days of Christmas
HumanoidCPU
2,397
14 Aug 2025
Niven Numbers (Long)
HumanoidCPU
7,466
14 Aug 2025
Tutorial
HumanoidCPU
111
13 Aug 2025
Fizz Buzz
HumanoidCPU
441
13 Aug 2025
Pascal’s Triangle
HumanoidCPU
797
13 Aug 2025
Odious Numbers
HumanoidCPU
101
11 Aug 2025
Trinomial Triangle
HumanoidCPU
2,095
6 Aug 2025
Rijndael S-box
HumanoidCPU
796
4 Aug 2025
Sphenic Numbers
HumanoidCPU
8,907
29 Jul 2025
π
Ralac07
1,053
28 Jul 2025