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Calendar
hole will go live in approximately
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. Why not try and solve it ahead of time?
Recent Solutions
Achievements
Cheevos
Golfers
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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
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
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
Multitap Input
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
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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
ALGOL 68
APL
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
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
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
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
Multitap Input
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
Hole
Golfer
Bytes
Time
Submitted
Tutorial
toubsen
65
6ms
41 mins ago
Ten-pin Bowling
edsrzf
🥉
142
6ms
5 hours ago
Fibonacci
albanian-laundromat
46
5ms
10 hours ago
Star Wars GPT
targrik
🥈
162
13ms
21 hours ago
Tower of Hanoi
KatieLG
369
5ms
42 hours ago
Smooth Numbers
GolfingSuccess
80
63ms
3 days ago
Number Spiral
targrik
🥈
102
5ms
4 days ago
Hexagonal Spiral
bitsandbeyond
199
6ms
5 days ago
Arithmetic Numbers
DialFrost
70
1,654ms
6 days ago
Morse Decoder
targrik
153
5ms
6 days ago
Evil Numbers
targrik
40
5ms
7 days ago
Calendar
targrik
184
9ms
7 days ago
Collatz
KasperKivimaeki
66
8ms
7 days ago
Pernicious Numbers (Long)
DialFrost
53
37ms
11 days ago
Arithmetic Numbers
xsot
💎
64
696ms
12 days ago
PalindromemordnilaP
xsot
🥉
75
5ms
12 days ago
Fibonacci
Pyroan
44
5ms
12 days ago
Maze
targrik
163
7ms
13 days ago
Prime Numbers
KasperKivimaeki
48
4ms
13 days ago
Prime Numbers (Long)
KasperKivimaeki
49
674ms
13 days ago
Fizz Buzz
amazingalek
73
4ms
13 days ago
Fizz Buzz
mwarvik
73
5ms
13 days ago
Happy Numbers (Long)
targrik
74
67ms
13 days ago
Odious Numbers (Long)
targrik
43
85ms
14 days ago
Odious Numbers
targrik
41
5ms
14 days ago
Catalan Numbers
DialFrost
🥉
164
117ms
14 days ago
Arabic to Roman
jessegyger
737
9ms
14 days ago
Arithmetic Numbers
KasperKivimaeki
🥈
67
1,324ms
15 days ago
Musical Chords
blaztoma
🥉
232
9ms
15 days ago
Maze
blaztoma
182
505ms
16 days ago
Sudoku (Fill-in)
blaztoma
🥉
312
12ms
17 days ago
ASCII Table
KasperKivimaeki
114
5ms
17 days ago
λ
JOrE20
1,008
5ms
17 days ago
Evil Numbers (Long)
snoozingnewt
61
5ms
18 days ago
Morse Encoder
targrik
179
5ms
19 days ago
Catalan Numbers
targrik
257
1,138ms
19 days ago
Snake
targrik
157
7ms
19 days ago
Multitap Input
targrik
117
11ms
19 days ago
Pernicious Numbers
KasperKivimaeki
🥇
35
5ms
19 days ago
𝑒
KasperKivimaeki
96
4,132ms
19 days ago
Niven Numbers (Long)
KasperKivimaeki
53
27ms
19 days ago
Niven Numbers
KasperKivimaeki
🥇
42
6ms
19 days ago
Odious Numbers (Long)
KasperKivimaeki
49
6ms
19 days ago
Smith Numbers
KasperKivimaeki
💎
94
1,873ms
19 days ago
Niven Numbers
snoozingnewt
43
5ms
19 days ago
Evil Numbers (Long)
KasperKivimaeki
52
5ms
19 days ago
99 Bottles of Beer
KasperKivimaeki
319
5ms
19 days ago
ROT13
KasperKivimaeki
41
7ms
19 days ago
Levenshtein Distance
KasperKivimaeki
🥇
56
5ms
20 days ago
Abundant Numbers (Long)
KasperKivimaeki
62
16ms
20 days ago
Sierpiński Triangle
KasperKivimaeki
🥇
51
6ms
20 days ago
Fizz Buzz
KasperKivimaeki
🥇
56
6ms
20 days ago
brainfuck
KasperKivimaeki
206
5ms
20 days ago
Divisors
KasperKivimaeki
62
6ms
21 days ago
Fibonacci
KasperKivimaeki
40
5ms
21 days ago
Number Spiral
emplv
🥉
103
7ms
21 days ago
12 Days of Christmas
TomvdPeet
501
5ms
22 days ago
Roman to Arabic
TomvdPeet
129
33ms
22 days ago
Fizz Buzz
CornerMercury
🥇
56
5ms
22 days ago
γ
JOrE20
1,008
6ms
24 days ago
Kolakoski Constant
JOrE20
1,008
5ms
24 days ago
Tutorial
TomvdPeet
71
5ms
24 days ago
Transpose Sentence
TomvdPeet
102
7ms
25 days ago
Diamonds
TomvdPeet
96
5ms
25 days ago
Continued Fractions
bitsandbeyond
155
6ms
25 days ago
Rule 110
targrik
107
18ms
26 days ago
99 Bottles of Beer
Flrnhd2
274
6ms
26 days ago
12 Days of Christmas
Flrnhd2
522
6ms
26 days ago
Tongue-twisters
prestosilver
541
6ms
26 days ago
Foo Fizz Buzz Bar
TomvdPeet
85
13ms
26 days ago
Fizz Buzz
TomvdPeet
🥇
56
7ms
26 days ago
Polyominoes
targrik
🥉
312
45ms
27 days ago
π
Carlos-EAC
1,008
4ms
27 days ago
Lucky Numbers
sean-niemann
74
1,320ms
27 days ago
Tower of Hanoi
xsot
🥇
54
7ms
2 Dec 2025
Tower of Hanoi
DialFrost
61
5ms
2 Dec 2025
Tower of Hanoi
CaedenHarper
3,582
5ms
1 Dec 2025
Tower of Hanoi
sean-niemann
🥇
54
6ms
1 Dec 2025
Star Wars GPT
TomvdPeet
232
6ms
1 Dec 2025
Spelling Numbers
dokutan
1,045
16ms
1 Dec 2025