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)
Taxicab Numbers
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
Dragon Curve
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Hexagonal Spiral
Highly Composite Numbers
Huffman Encoder
NFA Simulator
Nim
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic 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)
Taxicab Numbers
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
Dragon Curve
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Hexagonal Spiral
Highly Composite Numbers
Huffman Encoder
NFA Simulator
Nim
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Turtle
Tutorial
Hole
Golfer
Chars
Time
Submitted
Collatz
michelebastione
86
435ms
2 days ago
Collatz
scpchicken
🥉
83
404ms
7 days ago
Collatz
kasarino
94
407ms
17 Mar 2026
Collatz
bpharaldsson
87
397ms
9 Feb 2026
Collatz
amazingalek
🥉
83
430ms
21 Jan 2026
Collatz
arcpolaris
🥉
83
427ms
13 Jan 2026
Collatz
mwarvik
3,244
411ms
25 Dec 2025
Collatz
razvandmtr
90
527ms
6 Nov 2025
Collatz
gpikmddk
111
400ms
3 Nov 2025
Collatz
Flix7dev
🥉
83
403ms
21 Oct 2025
Collatz
CaedenHarper
🥉
83
410ms
17 Oct 2025
Collatz
snoozingnewt
92
433ms
8 Oct 2025
Collatz
ChromaChroma
92
398ms
7 Oct 2025
Collatz
albanian-laundromat
86
462ms
30 Sep 2025
Collatz
kmathis22
88
412ms
25 Sep 2025
Collatz
fuzzylojik-golf
🥉
83
427ms
8 Sep 2025
Collatz
tomh1012
🥉
83
429ms
28 Aug 2025
Collatz
kodaimasano
108
399ms
9 Jul 2025
Collatz
123mjb
90
422ms
23 Jun 2025
Collatz
stefangimmillaro
🥉
83
391ms
20 Jun 2025
Collatz
sean-niemann
🥉
83
420ms
20 Jun 2025
Collatz
MeWhenI
🥉
83
445ms
19 Jun 2025
Collatz
TheZwierzLF
94
379ms
2 Jun 2025
Collatz
Yax42
🥉
83
436ms
19 Apr 2025
Collatz
Tyrant7
🥉
83
413ms
19 Apr 2025
Collatz
kylejcwu
🥉
83
435ms
19 Apr 2025
Collatz
Squimbletin
94
438ms
19 Apr 2025
Collatz
janbehrens
84
404ms
17 Apr 2025
Collatz
Re-Adventures
84
401ms
15 Apr 2025
Collatz
ComputerKWasTaken
128
388ms
14 Apr 2025
Collatz
annaproxy
84
443ms
11 Apr 2025
Collatz
tomtheisen
85
407ms
10 Apr 2025
Collatz
DialFrost
🥉
83
432ms
10 Apr 2025
Collatz
m-tkach
🥉
83
410ms
10 Apr 2025
Collatz
HumanoidCPU
84
414ms
10 Apr 2025
Collatz
dokutan
🥉
83
463ms
9 Apr 2025
Collatz
namelessiw
🥉
83
422ms
9 Apr 2025
Collatz
Shanethegamer
84
443ms
9 Apr 2025
Collatz
kevinnaviapaiva
161
394ms
20 Feb 2025
Collatz
BeansMage42
144
379ms
28 Dec 2024
Collatz
madeforlosers
92
366ms
21 Nov 2024
Collatz
JesseNoEyes
108
437ms
24 Oct 2024
Collatz
Mabeloid
4,242
367ms
17 Sep 2024
Collatz
Grabnukebomb
84
387ms
13 Sep 2024
Collatz
ertz1ertz
84
419ms
13 Sep 2024
Collatz
hippopotam00sehead
106
387ms
11 Sep 2024
Collatz
Mikey-Beep
91
360ms
3 Sep 2024
Collatz
malworthy
93
381ms
19 Aug 2024
Collatz
rifatx
88
437ms
5 Jul 2024
Collatz
Matto58
109
377ms
3 Jul 2024
Collatz
KatieLG
91
413ms
30 Apr 2024
Collatz
deadp4nda
90
412ms
26 Apr 2024
Collatz
Alex-Huggett
98
430ms
13 Apr 2024
Collatz
tik25
126
452ms
28 Mar 2024
Collatz
trinityy-7
94
432ms
7 Mar 2024
Collatz
TRexOnGit
89
387ms
16 Feb 2024
Collatz
brimstonetrader
132
399ms
8 Jan 2024
Collatz
ElysiaVesper
101
459ms
19 Nov 2023
Collatz
GolfGPT
137
471ms
19 Nov 2023
Collatz
wgloverDH
104
485ms
6 Nov 2023
Collatz
josephdwalker
104
413ms
31 Oct 2023
Collatz
Maximizer02
92
428ms
1 Oct 2023
Collatz
bac0id
89
495ms
26 Sep 2023
Collatz
Widgitty
85
419ms
1 Sep 2023
Collatz
aDwarfNamedUrist
98
444ms
30 Aug 2023
Collatz
Mezzofloat
92
417ms
26 Aug 2023
Collatz
msbranicky
107
420ms
20 Aug 2023
Collatz
KrausRaus
🥉
83
448ms
31 Jul 2023
Collatz
gblikas
🥉
83
449ms
23 Jul 2023
Collatz
Pyro569
105
365ms
20 Jul 2023
Collatz
fkantelberg
89
467ms
15 Jul 2023
Collatz
GoodDays13
154
447ms
12 Jul 2023
Collatz
kellantech
92
395ms
4 Jul 2023
Collatz
AdrienHache
🥉
83
444ms
8 Jun 2023
Collatz
ericlangedijk
91
437ms
23 May 2023
Collatz
postie77
84
410ms
19 May 2023
Collatz
Matgc04
🥉
83
497ms
19 May 2023
Collatz
Adix-null
🥉
83
474ms
17 May 2023
Collatz
bwat2
87
464ms
6 Apr 2023
Collatz
arctouch-cristiannevianna
85
418ms
3 Apr 2023
Collatz
btnlq
🥉
83
433ms
9 Mar 2023
Collatz
StronkCheese
109
411ms
18 Feb 2023
Collatz
TimJackMaster
107
454ms
16 Feb 2023
Collatz
Yewzir
🥉
83
403ms
12 Feb 2023
Collatz
SiestaGuru
88
434ms
9 Jan 2023
Collatz
Betuaredead
🥉
83
483ms
5 Jan 2023
Collatz
retrohun
4,242
406ms
27 Dec 2022
Collatz
ChrisTheisen
92
423ms
14 Dec 2022
Collatz
astdefu
105
458ms
10 Dec 2022
Collatz
revlayle
86
444ms
7 Dec 2022
Collatz
Bodo171
122
437ms
6 Dec 2022
Collatz
Nickmiste
84
443ms
9 Nov 2022
Collatz
tpasfieldERAU
101
405ms
5 Nov 2022
Collatz
wescombs10
99
446ms
29 Oct 2022
Collatz
bschorno
92
410ms
12 Oct 2022
Collatz
Kloppermand
87
436ms
7 Oct 2022
Collatz
5quiwyrm
🥉
83
437ms
4 Sep 2022
Collatz
eshilo-draper
91
425ms
4 Sep 2022
Collatz
Smetalo
93
418ms
25 Aug 2022
Collatz
lovernj
112
417ms
23 Aug 2022