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
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
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
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
Rule 110
Seven Segment
SI Units
Sierpiński Triangle
Smith Numbers
Spelling Numbers
Star Wars Opening Crawl
Sudoku
Sudoku (Fill-in)
Ten-pin Bowling
Time Distance
Tongue-twisters
Transpose Sentence
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
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
Go
GolfScript
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
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
Go
GolfScript
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
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
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
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
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
Rule 110
Seven Segment
SI Units
Sierpiński Triangle
Smith Numbers
Spelling Numbers
Star Wars Opening Crawl
Sudoku
Sudoku (Fill-in)
Ten-pin Bowling
Time Distance
Tongue-twisters
Transpose Sentence
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Hole
Golfer
Bytes
Submitted
Collatz
edsrzf
🥉
91
5 days ago
Collatz
unfinishedprogram
103
23 Oct 2024
Collatz
avila-gabriel
116
17 Oct 2024
Collatz
sean-niemann
94
13 Oct 2024
Collatz
cdesodt
108
10 Oct 2024
Collatz
dokutan
100
3 Oct 2024
Collatz
KatieLG
4,245
29 Sep 2024
Collatz
Mabeloid
3,246
17 Sep 2024
Collatz
madeforlosers
108
5 Sep 2024
Collatz
somehybrid
110
24 Aug 2024
Collatz
trist224
93
12 Aug 2024
Collatz
smartiel
93
12 Aug 2024
Collatz
Florian-Mt
110
22 Jul 2024
Collatz
madex
108
9 Jul 2024
Collatz
acotis
93
8 Jul 2024
Collatz
wuzekai518
106
8 Jul 2024
Collatz
lynn
🥉
91
6 Jul 2024
Collatz
inverseLorentz
92
27 May 2024
Collatz
HumanoidCPU
101
7 May 2024
Collatz
rucin93
105
2 May 2024
Collatz
gurglemurgle5
125
26 Apr 2024
Collatz
Alex-Huggett
109
14 Apr 2024
Collatz
77Tigers
104
9 Apr 2024
Collatz
TylerBloom
96
22 Mar 2024
Collatz
siltyy
103
20 Mar 2024
Collatz
elgan65536
93
5 Mar 2024
Collatz
TheMadRey
118
5 Mar 2024
Collatz
CarsonChr
119
14 Jan 2024
Collatz
mousetail
94
12 Jan 2024
Collatz
okaponta
102
11 Jan 2024
Collatz
logvp
93
2 Jan 2024
Collatz
drabart
112
15 Dec 2023
Collatz
stefangimmillaro
92
24 Oct 2023
Collatz
funnsam
130
23 Oct 2023
Collatz
lambda-abstraction
112
21 Oct 2023
Collatz
msbranicky
100
5 Oct 2023
Collatz
snoozingnewt
108
23 Sep 2023
Collatz
craftablescience
128
19 Sep 2023
Collatz
yamin-shihab
103
14 Sep 2023
Collatz
StronkCheese
104
7 Sep 2023
Collatz
Heathcorp
108
25 Aug 2023
Collatz
WatMan77
146
16 Aug 2023
Collatz
ndren
105
2 Aug 2023
Collatz
GoodDays13
133
12 Jul 2023
Collatz
AlexanderFair
103
5 Jul 2023
Collatz
undersquire
104
21 Jun 2023
Collatz
ovs-code
94
21 Jun 2023
Collatz
bogdan-cu
151
31 May 2023
Collatz
MeWhenI
101
29 May 2023
Collatz
StHagel
105
25 May 2023
Collatz
klixel
🥉
91
20 May 2023
Collatz
diego-est
155
13 Apr 2023
Collatz
Z-snails
104
27 Feb 2023
Collatz
r-brinke
101
24 Feb 2023
Collatz
Betuaredead
110
5 Jan 2023
Collatz
retrohun
3,246
27 Dec 2022
Collatz
aDwarfNamedUrist
112
13 Dec 2022
Collatz
snobee
93
8 Dec 2022
Collatz
Super-Pizza
🥉
91
4 Dec 2022
Collatz
Starwort
102
11 Nov 2022
Collatz
Shanethegamer
98
26 Oct 2022
Collatz
andersk
🥉
91
25 Oct 2022
Collatz
datheia
299
23 Oct 2022
Collatz
nkoppel
94
19 Oct 2022
Collatz
JayXon
💎
88
17 Oct 2022
Collatz
jhpaques
114
30 Jul 2022
Collatz
ian-h-chamberlain
101
7 Jul 2022
Collatz
JGDoerrer
103
29 Jun 2022
Collatz
KatieLG-Transpiler
4,248
24 Jun 2022
Collatz
Natanaelel
94
17 Jun 2022
Collatz
TheSmilingTurtle
107
5 Jun 2022
Collatz
oliverjanka
183
2 Jun 2022
Collatz
hueblu
105
30 May 2022
Collatz
nipzu
94
17 May 2022
Collatz
oeb25
93
16 May 2022