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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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Language
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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
Mandelbrot
edsrzf
💎
132
3,176ms
15 hours ago
Kolakoski Constant
edsrzf
151
427ms
16 hours ago
Tower of Hanoi
sean-niemann
🥈
88
11ms
17 hours ago
Snake
kg583
200
29ms
17 hours ago
γ
JOrE20
1,016
6ms
32 hours ago
QR Decoder
edsrzf
💎
227
6ms
39 hours ago
QR Decoder
MeWhenI
🥈
232
6ms
40 hours ago
Tower of Hanoi
gigaprofisi
3,603
10ms
41 hours ago
QR Decoder
kg583
🥉
236
6ms
2 days ago
Minesweeper
kg583
💎
156
1,681ms
3 days ago
Abundant Numbers
DialFrost
84
25ms
3 days ago
Abundant Numbers (Long)
DialFrost
85
303ms
3 days ago
Billiards
kg583
💎
170
10ms
3 days ago
Lucky Numbers
edsrzf
134
411ms
4 days ago
Leap Years
edsrzf
🥈
60
14ms
4 days ago
Niven Numbers (Long)
edsrzf
95
77ms
4 days ago
24 Game
edsrzf
💎
287
3,146ms
4 days ago
Gijswijt’s Sequence
edsrzf
🥉
148
1,656ms
4 days ago
Smith Numbers
edsrzf
235
115ms
4 days ago
Arrows
edsrzf
225
7ms
4 days ago
Kaprekar Numbers
edsrzf
262
4,857ms
4 days ago
Kolakoski Sequence
edsrzf
99
36ms
4 days ago
Van Eck Sequence
edsrzf
84
19ms
4 days ago
Morse Encoder
edsrzf
💎
181
7ms
5 days ago
Morse Encoder
kg583
🥈
187
6ms
5 days ago
Ascending Primes
edsrzf
🥉
131
16ms
6 days ago
Morse Decoder
edsrzf
💎
150
5ms
6 days ago
Time Distance
edsrzf
275
16ms
6 days ago
Zeckendorf Representation
edsrzf
🥉
124
25ms
6 days ago
Vampire Numbers
edsrzf
🥈
225
4,832ms
6 days ago
Zodiac Signs
edsrzf
🥉
242
13ms
6 days ago
γ
edsrzf
183
75ms
7 days ago
Number Spiral
edsrzf
153
6ms
7 days ago
Reversi
kg583
🥇
175
1,146ms
7 days ago
Seven Segment
edsrzf
🥇
140
5ms
7 days ago
Seven Segment
kg583
152
5ms
8 days ago
Sudoku (Fill-in)
kg583
🥈
334
407ms
8 days ago
Polyominoes
kg583
🥉
287
1,045ms
8 days ago
Maze
kg583
🥉
149
598ms
8 days ago
Maze
edsrzf
💎
143
11ms
8 days ago
Arrows
snoozingnewt
201
7ms
8 days ago
24 Game
kg583
🥈
297
2,643ms
9 days ago
Tower of Hanoi
retrohun
10,731
10ms
9 days ago
Rijndael S-box
edsrzf
🥉
235
8ms
9 days ago
Pernicious Numbers (Long)
edsrzf
68
47ms
9 days ago
Odious Numbers
snoozingnewt
54
5ms
9 days ago
Odious Numbers (Long)
snoozingnewt
56
8ms
9 days ago
Evil Numbers (Long)
snoozingnewt
55
7ms
9 days ago
Evil Numbers
snoozingnewt
53
5ms
9 days ago
Catalan Numbers
edsrzf
🥇
58
6ms
10 days ago
λ
kg583
🥉
237
3,127ms
10 days ago
λ
edsrzf
💎
222
32ms
11 days ago
Smooth Numbers
GolfingSuccess
126
971ms
11 days ago
Quine
CornerMercury
🥇
26
5ms
11 days ago
Spelling Numbers
FortuiteMan
🥇
48
10ms
11 days ago
Spelling Numbers
CornerMercury
🥇
48
9ms
11 days ago
Tower of Hanoi
BREMAUCY
94
9ms
12 days ago
Tower of Hanoi
Schmitt-Very-Cool
127
10ms
12 days ago
Abundant Numbers
edsrzf
81
27ms
13 days ago
Abundant Numbers (Long)
edsrzf
82
304ms
13 days ago
Quine
JOrE20
🥇
26
5ms
13 days ago
Morse Decoder
kg583
🥉
175
5ms
14 days ago
Emojify
kg583
173
6ms
14 days ago
Tower of Hanoi
CLOStrophobic
95
8ms
14 days ago
Tongue-twisters
prestosilver
536
5ms
15 days ago
Tower of Hanoi
aksyristos
228
9ms
15 days ago
Rule 110
edsrzf
🥉
125
24ms
15 days ago
Tower of Hanoi
JOrE20
229
9ms
16 days ago
Fibonacci
snoozingnewt
52
5ms
16 days ago
Prime Numbers
edsrzf
64
5ms
16 days ago
Fizz Buzz
RockOfStone
107
9ms
16 days ago
Tower of Hanoi
CaedenHarper
3,585
7ms
16 days ago
Tower of Hanoi
blaztoma
94
8ms
17 days ago
Tower of Hanoi
dokutan
308
7ms
17 days ago
Tower of Hanoi
snoozingnewt
94
8ms
17 days ago
Tower of Hanoi
emgordon154
3,585
6ms
18 days ago
Tower of Hanoi
Yewzir
105
8ms
18 days ago
24 Game
KatieLG
4,737
1,822ms
18 days ago
Farey Sequence
KatieLG
2,605
228ms
18 days ago
Tower of Hanoi
bitsandbeyond
102
9ms
18 days ago