Recent Solutions
Prev Hole
Play Hole
Next Hole
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
Minesweeper
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
Trinomial Triangle
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Apéry’s Constant
Binary Lambda Calculus
Calendar
Connect Four
Continued Fractions
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Tower of Hanoi
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
Luau
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
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
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
Minesweeper
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
Trinomial Triangle
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Experimental Hole
Apéry’s Constant
Binary Lambda Calculus
Calendar
Connect Four
Continued Fractions
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Tower of Hanoi
Turtle
Tutorial
Hole
Golfer
Bytes
Time
Submitted
Collatz
arcpolaris
88
344ms
14 days ago
Collatz
razvandmtr
90
493ms
16 days ago
Collatz
gpikmddk
111
336ms
19 days ago
Collatz
Flix7dev
84
341ms
21 Oct 2025
Collatz
CaedenHarper
🥉
83
336ms
17 Oct 2025
Collatz
snoozingnewt
92
335ms
8 Oct 2025
Collatz
ChromaChroma
92
330ms
7 Oct 2025
Collatz
albanian-laundromat
86
362ms
30 Sep 2025
Collatz
kmathis22
88
343ms
25 Sep 2025
Collatz
fuzzylojik-golf
🥉
83
328ms
8 Sep 2025
Collatz
tomh1012
🥉
83
334ms
28 Aug 2025
Collatz
michelebastione
90
365ms
24 Aug 2025
Collatz
kodaimasano
108
462ms
9 Jul 2025
Collatz
123mjb
90
321ms
23 Jun 2025
Collatz
stefangimmillaro
🥉
83
350ms
20 Jun 2025
Collatz
sean-niemann
🥉
83
335ms
20 Jun 2025
Collatz
MeWhenI
🥉
83
334ms
19 Jun 2025
Collatz
TheZwierzLF
94
357ms
2 Jun 2025
Collatz
Yax42
🥉
83
353ms
19 Apr 2025
Collatz
Tyrant7
🥉
83
345ms
19 Apr 2025
Collatz
Pecanolith
🥉
83
345ms
19 Apr 2025
Collatz
Squimbletin
94
343ms
19 Apr 2025
Collatz
janbehrens
84
349ms
17 Apr 2025
Collatz
Re-Adventures
84
324ms
15 Apr 2025
Collatz
ComputerKWasTaken
128
318ms
14 Apr 2025
Collatz
annaproxy
84
332ms
11 Apr 2025
Collatz
tomtheisen
85
344ms
10 Apr 2025
Collatz
DialFrost
🥉
83
348ms
10 Apr 2025
Collatz
m-tkach
🥉
83
328ms
10 Apr 2025
Collatz
HumanoidCPU
84
344ms
10 Apr 2025
Collatz
dokutan
🥉
83
350ms
9 Apr 2025
Collatz
namelessiw
🥉
83
338ms
9 Apr 2025
Collatz
Shanethegamer
84
341ms
9 Apr 2025
Collatz
kevinnaviapaiva
161
343ms
20 Feb 2025
Collatz
BeansMage42
144
336ms
28 Dec 2024
Collatz
madeforlosers
92
320ms
21 Nov 2024
Collatz
JesseNoEyes
108
310ms
24 Oct 2024
Collatz
Mabeloid
4,242
316ms
17 Sep 2024
Collatz
Grabnukebomb
84
314ms
13 Sep 2024
Collatz
ertz1ertz
84
317ms
13 Sep 2024
Collatz
hippopotam00sehead
106
317ms
11 Sep 2024
Collatz
Mikey-Beep
91
316ms
3 Sep 2024
Collatz
malworthy
93
329ms
19 Aug 2024
Collatz
rifatx
88
327ms
5 Jul 2024
Collatz
Matto58
109
322ms
3 Jul 2024
Collatz
KatieLG
91
333ms
30 Apr 2024
Collatz
deadp4nda
90
315ms
26 Apr 2024
Collatz
Alex-Huggett
98
308ms
13 Apr 2024
Collatz
tik25
126
318ms
28 Mar 2024
Collatz
trinityy-7
94
329ms
7 Mar 2024
Collatz
TRexOnGit
89
320ms
16 Feb 2024
Collatz
brimstonetrader
132
335ms
8 Jan 2024
Collatz
ElysiaVesper
101
321ms
19 Nov 2023
Collatz
GolfGPT
137
342ms
19 Nov 2023
Collatz
wgloverDH
104
322ms
6 Nov 2023
Collatz
josephdwalker
104
322ms
31 Oct 2023
Collatz
Maximizer02
92
313ms
1 Oct 2023
Collatz
bac0id
90
320ms
26 Sep 2023
Collatz
Widgitty
86
326ms
1 Sep 2023
Collatz
aDwarfNamedUrist
98
313ms
30 Aug 2023
Collatz
Mezzofloat
92
311ms
26 Aug 2023
Collatz
msbranicky
107
342ms
20 Aug 2023
Collatz
KrausRaus
🥉
83
332ms
31 Jul 2023
Collatz
gblikas
🥉
83
395ms
23 Jul 2023
Collatz
Pyro569
105
311ms
20 Jul 2023
Collatz
fkantelberg
89
319ms
15 Jul 2023
Collatz
GoodDays13
154
330ms
12 Jul 2023
Collatz
kellantech
92
312ms
4 Jul 2023
Collatz
AdrienHache
🥉
83
335ms
8 Jun 2023
Collatz
ericlangedijk
91
330ms
23 May 2023
Collatz
postie77
84
319ms
19 May 2023
Collatz
Matgc04
84
319ms
19 May 2023
Collatz
Adix-null
🥉
83
335ms
17 May 2023
Collatz
bwat2
87
317ms
6 Apr 2023
Collatz
arctouch-cristiannevianna
85
321ms
3 Apr 2023