The
Calendar
hole will go live in approximately
10 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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D
Dart
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iogii
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Chars
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Chars
Language
All
><>
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
TheZwierzLF
139
1,333ms
a min ago
Billiards
TheZwierzLF
215
51ms
18 mins ago
Medal Tally
TheZwierzLF
265
40ms
21 mins ago
Forsyth–Edwards Notation
TheZwierzLF
157
43ms
22 mins ago
Pernicious Numbers
TheZwierzLF
62
53ms
26 mins ago
Pernicious Numbers (Long)
TheZwierzLF
63
50ms
27 mins ago
Number Spiral
TheZwierzLF
179
50ms
33 mins ago
Sierpiński Triangle
TheZwierzLF
70
40ms
2 hours ago
Proximity Grid
TheZwierzLF
200
58ms
2 hours ago
Repeating Decimals
TheZwierzLF
302
36ms
2 hours ago
Ordinal Numbers
TheZwierzLF
80
35ms
2 hours ago
Kolakoski Constant
TheZwierzLF
107
3,076ms
2 hours ago
Game of Life
TheZwierzLF
211
293ms
3 hours ago
Calendar
Natanaelel
157
51ms
3 hours ago
Odious Numbers (Long)
TheZwierzLF
44
36ms
3 hours ago
Odious Numbers
TheZwierzLF
43
40ms
3 hours ago
Evil Numbers
TheZwierzLF
43
47ms
3 hours ago
Abundant Numbers (Long)
TheZwierzLF
53
50ms
3 hours ago
Abundant Numbers
TheZwierzLF
52
45ms
4 hours ago
N Queens
TheZwierzLF
120
77ms
4 hours ago
Calendar
pardouin
141
46ms
5 hours ago
Cubes
blaztoma
191
45ms
7 hours ago
Leyland Numbers
TheZwierzLF
73
34ms
17 hours ago
Pangram Grep
TheZwierzLF
54
36ms
17 hours ago
Collatz
TheZwierzLF
66
39ms
17 hours ago
Fibonacci
TheZwierzLF
34
55ms
18 hours ago
Farey Sequence
TheZwierzLF
170
86ms
19 hours ago
ASCII Table
TheZwierzLF
141
49ms
19 hours ago
Pascal’s Triangle
TheZwierzLF
59
56ms
19 hours ago
Tongue-twisters
TheZwierzLF
433
47ms
19 hours ago
Smith Numbers
TheZwierzLF
134
183ms
20 hours ago
Arrows
TheZwierzLF
292
58ms
20 hours ago
Pangram Grep
kmathis22
87
41ms
21 hours ago
Hexdump
TheZwierzLF
208
39ms
22 hours ago
Continued Fractions
Matter1024
98
33ms
23 hours ago
Diamonds
TheZwierzLF
117
38ms
23 hours ago
Time Distance
TheZwierzLF
279
45ms
23 hours ago
PalindromemordnilaP
xsot
50
37ms
24 hours ago
Rule 110
TheZwierzLF
121
110ms
25 hours ago
Arabic to Roman
TheZwierzLF
137
98ms
25 hours ago
Reverse Polish Notation
TheZwierzLF
86
47ms
25 hours ago
Factorial Factorisation
TheZwierzLF
90
59ms
26 hours ago
Happy Numbers (Long)
TheZwierzLF
111
39ms
27 hours ago
12 Days of Christmas
TheZwierzLF
466
42ms
27 hours ago
Calendar
stefangimmillaro
135
35ms
30 hours ago
Christmas Trees
blaztoma
59
34ms
32 hours ago
Tower of Hanoi
JayXon
🥇
47
37ms
33 hours ago
Hexagonal Spiral
bitsandbeyond
168
33ms
43 hours ago
Christmas Trees
TheZwierzLF
68
33ms
45 hours ago
Fractions
TheZwierzLF
71
36ms
45 hours ago
N Queens
blaztoma
🥈
83
118ms
46 hours ago
Calendar
ovs-code
142
38ms
2 days ago
Pernicious Numbers
blaztoma
30
41ms
2 days ago
Set
sean-niemann
74
51ms
2 days ago
Catalan Numbers
TheZwierzLF
71
45ms
2 days ago
Kaprekar Numbers
TheZwierzLF
263
3,693ms
2 days ago
Sierpiński Triangle
blaztoma
57
37ms
2 days ago
Emirp Numbers (Long)
TheZwierzLF
86
442ms
2 days ago
Cubes
TheZwierzLF
180
37ms
2 days ago
Trinomial Triangle
TheZwierzLF
63
44ms
2 days ago
Partition Numbers
TheZwierzLF
99
58ms
2 days ago
Quine
logalex8369
29
53ms
2 days ago
Seven Segment
TheZwierzLF
172
31ms
3 days ago
Calendar
sean-niemann
170
40ms
3 days ago
φ
TheZwierzLF
103
53ms
3 days ago
Multitap Input
stefangimmillaro
76
48ms
3 days ago
Fizz Buzz
amazingalek
72
35ms
3 days ago
Levenshtein Distance
TheZwierzLF
197
49ms
3 days ago
Divisors
TheZwierzLF
48
33ms
3 days ago
Van Eck Sequence
TheZwierzLF
64
33ms
3 days ago
Niven Numbers
TheZwierzLF
39
34ms
3 days ago
Niven Numbers (Long)
TheZwierzLF
39
45ms
3 days ago
Fibonacci
Pyroan
38
34ms
3 days ago
Leap Years
TheZwierzLF
48
38ms
3 days ago
Arithmetic Numbers
TheZwierzLF
85
1,949ms
3 days ago
γ
JOrE20
1,008
35ms
4 days ago
Minesweeper
dokutan
171
76ms
4 days ago
Sudoku (Fill-in)
blaztoma
173
134ms
4 days ago
Repeating Decimals
blaztoma
112
59ms
4 days ago
Diamonds
gigaprofisi
1,109
48ms
4 days ago