Recent Solutions
Achievements
Cheevos
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
Calendar
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
Continued Fractions
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
Gray Code Decoder
Gray Code Encoder
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
Minesweeper
Morse Decoder
Morse Encoder
Multitap Input
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
Tower of Hanoi
Transpose Sentence
Trinomial Triangle
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Alphabetic Numbers
Apéry’s Constant
Binary Lambda Calculus
Connect Four
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Hexagonal Spiral
Highly Composite Numbers
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
All Languages
><>
ALGOL 68
ArkScript
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Common Lisp
Crystal
D
Dart
Elixir
Erlang
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
APL
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Lily
Luau
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
Umka
Vala
Vyxal
Bytes
Chars
Scoring
Bytes
Chars
Language
All
><>
ALGOL 68
ArkScript
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Common Lisp
Crystal
D
Dart
Elixir
Erlang
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
APL
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Lily
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
Calendar
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
Continued Fractions
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
Gray Code Decoder
Gray Code Encoder
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
Minesweeper
Morse Decoder
Morse Encoder
Multitap Input
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
Tower of Hanoi
Transpose Sentence
Trinomial Triangle
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Experimental Hole
Alphabetic Numbers
Apéry’s Constant
Binary Lambda Calculus
Connect Four
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Hexagonal Spiral
Highly Composite Numbers
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
Hole
Golfer
Chars
Time
Submitted
Reversi
dokutan
166
69ms
4 days ago
Poker
dokutan
176
70ms
4 days ago
Niven Numbers (Long)
dokutan
59
66ms
4 days ago
Multitap Input
dokutan
113
64ms
4 days ago
Morse Encoder
dokutan
115
59ms
4 days ago
Maze
dokutan
106
104ms
4 days ago
Lucky Tickets
dokutan
85
64ms
4 days ago
Lucky Numbers
dokutan
61
62ms
4 days ago
Happy Numbers (Long)
dokutan
74
322ms
4 days ago
Forsyth–Edwards Notation
dokutan
102
61ms
4 days ago
Continued Fractions
dokutan
96
61ms
4 days ago
Card Number Validation
dokutan
84
63ms
4 days ago
ASCII Table
dokutan
86
62ms
4 days ago
Arrows
dokutan
86
76ms
4 days ago
99 Bottles of Beer
dokutan
146
64ms
4 days ago
Fizz Buzz
madex
124
65ms
18 days ago
Trinomial Triangle
dokutan
65
64ms
18 days ago
Game of Life
dokutan
107
63ms
18 days ago
Fractions
dokutan
70
64ms
18 days ago
Diamonds
dokutan
81
66ms
18 days ago
Pernicious Numbers
GolfingSuccess
48
61ms
19 days ago
Pascal’s Triangle
dokutan
60
63ms
20 days ago
Arithmetic Numbers
dokutan
72
2,874ms
20 days ago
Abundant Numbers
dokutan
65
64ms
20 days ago
Number Spiral
snoozingnewt
82
65ms
25 days ago
Farey Sequence
snoozingnewt
68
65ms
25 days ago
Calendar
snoozingnewt
83
65ms
25 days ago
Arithmetic Numbers
snoozingnewt
72
2,939ms
25 days ago
Abundant Numbers
snoozingnewt
64
61ms
25 days ago
Abundant Numbers (Long)
snoozingnewt
66
105ms
25 days ago
Prime Numbers
snoozingnewt
49
61ms
25 days ago
ROT13
dokutan
67
70ms
26 days ago
Prime Numbers (Long)
dokutan
52
171ms
26 days ago
Prime Numbers
dokutan
49
66ms
26 days ago
Farey Sequence
dokutan
73
64ms
26 days ago
Calendar
dokutan
83
70ms
26 days ago
Pernicious Numbers (Long)
snoozingnewt
60
64ms
26 days ago
Leyland Numbers
snoozingnewt
70
71ms
26 days ago
Hexdump
snoozingnewt
102
62ms
26 days ago
𝑒
snoozingnewt
56
69ms
26 days ago
√2
snoozingnewt
57
65ms
26 days ago
Trinomial Triangle
snoozingnewt
65
64ms
26 days ago
ROT13
snoozingnewt
67
63ms
26 days ago
Prime Numbers (Long)
snoozingnewt
52
164ms
26 days ago
Pascal’s Triangle
snoozingnewt
60
64ms
26 days ago
Odious Numbers (Long)
snoozingnewt
49
61ms
26 days ago
Odious Numbers
snoozingnewt
48
64ms
26 days ago
Niven Numbers
snoozingnewt
52
62ms
26 days ago
ln 2
snoozingnewt
60
72ms
26 days ago
Happy Numbers
snoozingnewt
64
62ms
26 days ago
Foo Fizz Buzz Bar
snoozingnewt
75
63ms
26 days ago
Fibonacci
snoozingnewt
44
61ms
26 days ago
Evil Numbers
snoozingnewt
48
63ms
26 days ago
Day of Week
snoozingnewt
76
63ms
26 days ago
12 Days of Christmas
snoozingnewt
207
62ms
26 days ago
99 Bottles of Beer
snoozingnewt
146
64ms
26 days ago
24 Game
snoozingnewt
131
2,284ms
26 days ago
γ
snoozingnewt
90
107ms
26 days ago
Fizz Buzz
snoozingnewt
63
62ms
26 days ago
Divisors
snoozingnewt
62
62ms
26 days ago
Catalan Numbers
snoozingnewt
52
65ms
26 days ago
Alphabetic Numbers
HumanoidCPU
3,904
72ms
26 days ago
Smith Numbers
dokutan
113
1,041ms
27 Feb 2026
Niven Numbers
dokutan
52
59ms
27 Feb 2026
Morse Decoder
dokutan
131
64ms
27 Feb 2026
Happy Numbers
dokutan
64
62ms
27 Feb 2026
Emojify
dokutan
113
68ms
27 Feb 2026
Catalan Numbers
dokutan
52
62ms
27 Feb 2026
Odious Numbers (Long)
dokutan
49
59ms
21 Feb 2026
Odious Numbers
dokutan
48
62ms
21 Feb 2026
Christmas Trees
dokutan
69
60ms
21 Feb 2026
brainfuck
dokutan
130
77ms
21 Feb 2026
24 Game
dokutan
160
1,630ms
21 Feb 2026
Day of Week
dokutan
76
64ms
15 Feb 2026
φ
dokutan
68
59ms
14 Feb 2026
τ
dokutan
71
61ms
14 Feb 2026
π
dokutan
71
60ms
14 Feb 2026
ln 2
dokutan
60
69ms
14 Feb 2026
Evil Numbers
dokutan
48
62ms
14 Feb 2026
√2
dokutan
57
57ms
14 Feb 2026