Recent Solutions
Prev Hole
Play Hole
Next Hole
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
Bytes
Time
Submitted
Collatz
madeforlosers
268
108ms
18 mins ago
Collatz
mkikta
76
27ms
3 hours ago
Collatz
madeforlosers
73
23ms
23 hours ago
Collatz
Jakob-L-M
80
29ms
24 hours ago
Collatz
Mikey-Beep
70
31ms
26 hours ago
Collatz
jusaka
42
14ms
27 hours ago
Collatz
vang1ong7ang
89
134ms
32 hours ago
Collatz
Arkadios200
82
31ms
34 hours ago
Collatz
JNedd26
86
31ms
41 hours ago
Collatz
CoderColby
107
1,384ms
46 hours ago
Collatz
Nathan-Masala
102
384ms
2 days ago
Collatz
Nathan-Masala
89
30ms
2 days ago
Collatz
ComradeSquirrel
61
12ms
3 days ago
Collatz
madex
71
1,355ms
3 days ago
Collatz
madex
63
6ms
3 days ago
Collatz
edsrzf
109
330ms
3 days ago
Collatz
edsrzf
70
23ms
3 days ago
Collatz
madex
54
39ms
4 days ago
Collatz
DayDun
56
12ms
4 days ago
Collatz
osNiko
69
53ms
4 days ago
Collatz
solisolu
79
3ms
4 days ago
Collatz
snoozingnewt
91
132ms
5 days ago
Collatz
Steffan153
🥉
75
2,579ms
5 days ago
Collatz
kasarino
101
42ms
6 days ago
Collatz
NameRandomString
3,232
3ms
6 days ago
Collatz
jusaka
70
21ms
7 days ago
Collatz
liamjermy6
98
61ms
7 days ago
Collatz
Andrey2001
77
480ms
8 days ago
Collatz
Andrey2001
77
24ms
8 days ago
Collatz
Zin9zan9
73
94ms
8 days ago
Collatz
professor-l
95
16ms
8 days ago
Collatz
Zin9zan9
73
19ms
8 days ago
Collatz
brian124634
79
2ms
9 days ago
Collatz
denkyuu1
79
205ms
9 days ago
Collatz
Steffan153
🥇
49
66ms
9 days ago
Collatz
Sandw1ch123
74
20ms
10 days ago
Collatz
Arkadios200
76
91ms
10 days ago
Collatz
emgordon154
🥉
124
27ms
11 days ago
Collatz
denkyuu1
78
22ms
13 days ago
Collatz
Protothor
59
11ms
13 days ago
Collatz
Googolplexo
70
19ms
15 days ago
Collatz
kevinnaviapaiva
73
41ms
15 days ago
Collatz
dokutan
3,233
3ms
18 days ago
Collatz
CaedenHarper
3,233
3ms
19 days ago
Collatz
madex
74
2ms
19 days ago
Collatz
error256
🥉
81
18ms
20 days ago
Collatz
Steffan153
💎
79
21ms
20 days ago
Collatz
Steffan153
🥇
105
13ms
20 days ago
Collatz
GolfingSuccess
🥉
109
17ms
21 days ago
Collatz
Steffan153
💎
51
1,122ms
21 days ago
Collatz
kasarino
94
370ms
22 days ago
Collatz
madeforlosers
72
102ms
22 days ago
Collatz
madeforlosers
129
42ms
22 days ago
Collatz
madeforlosers
143
26ms
22 days ago
Collatz
madeforlosers
134
25ms
22 days ago
Collatz
madeforlosers
82
5ms
22 days ago
Collatz
madeforlosers
77
160ms
22 days ago
Collatz
madeforlosers
106
62ms
22 days ago
Collatz
madeforlosers
110
1,259ms
22 days ago
Collatz
madeforlosers
120
420ms
22 days ago
Collatz
madeforlosers
69
4ms
22 days ago
Collatz
madeforlosers
92
128ms
22 days ago
Collatz
madeforlosers
210
37ms
22 days ago
Collatz
madeforlosers
60
29ms
23 days ago
Collatz
madeforlosers
53
38ms
23 days ago
Collatz
madeforlosers
68
1,079ms
23 days ago
Collatz
madeforlosers
156
110ms
23 days ago
Collatz
madeforlosers
103
14ms
23 days ago
Collatz
madeforlosers
80
454ms
23 days ago
Collatz
kasarino
94
2ms
23 days ago
Collatz
kasarino
88
18ms
23 days ago
Collatz
kitotch
83
24ms
23 days ago
Collatz
albanian-laundromat
126
27ms
23 days ago
Collatz
madex
52
277ms
23 days ago
Collatz
CaedenHarper
28
161ms
23 days ago
Collatz
madex
81
2,289ms
24 days ago
Collatz
madex
101
126ms
24 days ago
Collatz
madex
72
25ms
24 days ago
Collatz
madex
57
13ms
24 days ago
Collatz
dokutan
1,515
279ms
24 days ago