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Calendar
hole will go live in approximately
9 days
. Why not try and solve it ahead of time?
Recent Solutions
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
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
Happy Numbers (Long)
TheZwierzLF
107
38ms
3 mins ago
Mandelbrot
TheZwierzLF
129
1,552ms
5 mins ago
Hexdump
TheZwierzLF
207
39ms
10 mins ago
√2
TheZwierzLF
114
48ms
13 mins ago
Arrows
TheZwierzLF
289
55ms
14 mins ago
Minesweeper
TheZwierzLF
189
1,279ms
16 mins ago
Morse Decoder
FortuiteMan
167
16ms
19 mins ago
Factorial Factorisation
CornerMercury
118
18ms
20 mins ago
Musical Chords
blaztoma
157
16ms
37 mins ago
λ
JOrE20
1,008
184ms
44 mins ago
Reverse Polish Notation
Mukundan314
77
26ms
62 mins ago
λ
JOrE20
1,014
7ms
62 mins ago
λ
JOrE20
1,006
4ms
62 mins ago
Proximity Grid
TheZwierzLF
166
79ms
64 mins ago
Partition Numbers
codewrite
120
511ms
65 mins ago
Jacobi Symbol
TheZwierzLF
147
54ms
68 mins ago
Partition Numbers
codewrite
90
14ms
70 mins ago
Zodiac Signs
TheZwierzLF
204
43ms
71 mins ago
Calendar
pardouin
241
3,066ms
84 mins ago
Topological Sort
Natanaelel
🥇
132
251ms
98 mins ago
Morse Encoder
blaztoma
168
16ms
2 hours ago
Abundant Numbers
Trildcookie
81
11ms
2 hours ago
Calendar
rucin93
182
11ms
3 hours ago
Calendar
tomh1012
229
436ms
3 hours ago
Medal Tally
TheZwierzLF
264
47ms
3 hours ago
Foo Fizz Buzz Bar
TheZwierzLF
128
48ms
3 hours ago
QR Decoder
TheZwierzLF
325
18ms
3 hours ago
Intersection
TheZwierzLF
156
47ms
3 hours ago
Calendar
qrakhen
323
451ms
4 hours ago
Hilbert Curve
edsrzf
💎
295
1,165ms
4 hours ago
Hilbert Curve
edsrzf
💎
359
392ms
5 hours ago
Smith Numbers
HumanoidCPU
282
606ms
5 hours ago
12 Days of Christmas
tmyt
562
2ms
5 hours ago
Prime Numbers (Long)
edsrzf
58
1,572ms
6 hours ago
Diamonds
emgordon154
223
2,038ms
6 hours ago
Farey Sequence
emgordon154
💎
164
1,957ms
6 hours ago
Morse Encoder
edsrzf
💎
178
185ms
6 hours ago
Poker
warmCabin
447
2ms
6 hours ago
99 Bottles of Beer
albanian-laundromat
340
331ms
6 hours ago
Zodiac Signs
emgordon154
🥈
270
1,965ms
6 hours ago
Tutorial
Jigglypuffed
67
2ms
6 hours ago
99 Bottles of Beer
emgordon154
494
1,880ms
7 hours ago
Tower of Hanoi
JayXon
🥇
54
110ms
7 hours ago
Fizz Buzz
albanian-laundromat
131
366ms
7 hours ago
Foo Fizz Buzz Bar
albanian-laundromat
170
323ms
7 hours ago
Foo Fizz Buzz Bar
albanian-laundromat
136
45ms
7 hours ago
Morse Decoder
edsrzf
💎
161
160ms
7 hours ago
Lucky Numbers
albanian-laundromat
170
377ms
7 hours ago
Tower of Hanoi
JayXon
💎
64
1,579ms
7 hours ago
Roman to Arabic
edsrzf
🥉
120
203ms
8 hours ago
Calendar
Languag3
106
16ms
8 hours ago
λ
emgordon154
💎
376
2,170ms
8 hours ago
Emirp Numbers (Long)
KatieLG
🥈
274
3,318ms
8 hours ago
Arithmetic Numbers
albanian-laundromat
125
418ms
8 hours ago
Prime Numbers (Long)
KatieLG
153
1,672ms
8 hours ago
Tower of Hanoi
JayXon
💎
59
127ms
8 hours ago
Tower of Hanoi
JayXon
🥇
57
2ms
8 hours ago
Smith Numbers
HumanoidCPU
168
1,869ms
8 hours ago
Smith Numbers
HumanoidCPU
173
1,199ms
8 hours ago
Happy Numbers
albanian-laundromat
110
304ms
8 hours ago
Minesweeper
kg583
💎
153
282ms
8 hours ago
Happy Numbers
albanian-laundromat
94
94ms
8 hours ago
Tic-tac-toe
edsrzf
🥈
101
220ms
9 hours ago
Niven Numbers
albanian-laundromat
🥇
42
10ms
9 hours ago
Tower of Hanoi
DialFrost
💎
71
22ms
9 hours ago
Lucky Tickets
albanian-laundromat
💎
216
11ms
9 hours ago
Kolakoski Sequence
sisyphus-ppcg
🥇
43
100ms
9 hours ago
Ascending Primes
edsrzf
94
4,435ms
10 hours ago
brainfuck
osNiko
127
65ms
10 hours ago
Cubes
albanian-laundromat
🥇
224
3ms
10 hours ago
Collatz
osNiko
82
53ms
10 hours ago
Calendar
stefangimmillaro
132
40ms
10 hours ago
Mahjong
snoozingnewt
💎
288
122ms
10 hours ago
Fibonacci
osNiko
53
60ms
10 hours ago
Mahjong
snoozingnewt
308
1,615ms
11 hours ago
Mahjong
snoozingnewt
316
29ms
11 hours ago
Arithmetic Numbers
osNiko
88
333ms
11 hours ago
Vampire Numbers
snoozingnewt
132
817ms
11 hours ago
Vampire Numbers
snoozingnewt
132
305ms
11 hours ago
Abundant Numbers (Long)
osNiko
76
81ms
11 hours ago