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Calendar
hole will go live in approximately
38 hours
. 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
Chars
Time
Submitted
Fizz Buzz
JOrE20
68
223ms
17 hours ago
γ
JOrE20
52
1,887ms
18 hours ago
Calendar
antimon2
213
589ms
22 hours ago
Tower of Hanoi
KatieLG
337
169ms
39 hours ago
Trinomial Triangle
error256
🥇
59
421ms
5 days ago
Hexagonal Spiral
bitsandbeyond
236
229ms
5 days ago
Zeckendorf Representation
JOrE20
154
233ms
5 days ago
Tower of Hanoi
JayXon
🥇
45
329ms
9 days ago
Tower of Hanoi
sean-niemann
🥇
45
354ms
9 days ago
Smooth Numbers
ovs-code
57
787ms
12 days ago
Smooth Numbers
GolfingSuccess
61
1,279ms
12 days ago
Kaprekar Numbers
blaztoma
74
718ms
13 days ago
π
kurkale6ka
48
2,381ms
14 days ago
λ
JOrE20
1,011
151ms
17 days ago
Foo Fizz Buzz Bar
BREMAUCY
89
220ms
18 days ago
Niven Numbers (Long)
snoozingnewt
42
328ms
18 days ago
Kaprekar Numbers
Lv0Sys
60
1,339ms
19 days ago
Arrows
snoozingnewt
121
224ms
20 days ago
Pernicious Numbers (Long)
snoozingnewt
54
279ms
20 days ago
Pangram Grep
snoozingnewt
🥉
40
520ms
20 days ago
Odious Numbers (Long)
snoozingnewt
41
249ms
20 days ago
Odious Numbers
snoozingnewt
40
275ms
20 days ago
Niven Numbers
snoozingnewt
37
294ms
20 days ago
Evil Numbers
snoozingnewt
40
229ms
20 days ago
Evil Numbers (Long)
snoozingnewt
42
265ms
20 days ago
Arithmetic Numbers
snoozingnewt
66
540ms
20 days ago
Continued Fractions
Shanethegamer
127
365ms
20 days ago
Pernicious Numbers
snoozingnewt
32
257ms
22 days ago
Quine
CornerMercury
🥇
32
355ms
22 days ago
Odious Numbers (Long)
Lv0Sys
42
334ms
22 days ago
τ
ndren
71
240ms
22 days ago
Niven Numbers (Long)
Lv0Sys
43
364ms
22 days ago
PalindromemordnilaP
HPWiz
🥇
58
218ms
23 days ago
γ
CornerMercury
48
256ms
23 days ago
φ
BREMAUCY
🥇
36
220ms
23 days ago
𝑒
BREMAUCY
🥇
29
200ms
23 days ago
γ
BREMAUCY
🥇
41
252ms
23 days ago
√2
BREMAUCY
🥇
34
2,134ms
23 days ago
π
BREMAUCY
🥇
30
211ms
23 days ago
τ
BREMAUCY
🥇
39
2,041ms
23 days ago
Catalan’s Constant
BREMAUCY
🥇
46
248ms
23 days ago
ln 2
BREMAUCY
🥇
40
2,127ms
23 days ago
Catalan Numbers
Lv0Sys
43
280ms
23 days ago
Multitap Input
Shanethegamer
128
457ms
24 days ago
Happy Numbers (Long)
Lv0Sys
67
385ms
24 days ago
Fractions
Lv0Sys
68
298ms
24 days ago
Van Eck Sequence
Lv0Sys
69
329ms
24 days ago
Emojify
Lv0Sys
184
482ms
25 days ago
π
CornerMercury
34
204ms
26 days ago
Leyland Numbers
Lv0Sys
56
1,112ms
26 days ago
United States
Lv0Sys
164
360ms
26 days ago
Tongue-twisters
prestosilver
544
171ms
26 days ago
Catalan Numbers
snoozingnewt
41
553ms
26 days ago
Abundant Numbers
Lv0Sys
47
402ms
26 days ago
Cubes
Lv0Sys
197
459ms
27 days ago
Leap Years
Lv0Sys
42
358ms
27 days ago
Poker
Lv0Sys
373
762ms
27 days ago
Day of Week
DialFrost
166
274ms
2 Dec 2025
Fizz Buzz
CornerMercury
59
236ms
2 Dec 2025
λ
Lv0Sys
189
368ms
1 Dec 2025
Niven Numbers
Lv0Sys
39
331ms
1 Dec 2025
Morse Decoder
Lv0Sys
187
651ms
30 Nov 2025
Morse Encoder
Lv0Sys
191
303ms
30 Nov 2025
λ
KatieLG
1,010
195ms
30 Nov 2025
Van Eck Sequence
KatieLG
1,687
178ms
30 Nov 2025
Vampire Numbers
KatieLG
1,039
180ms
30 Nov 2025
Trinomial Triangle
KatieLG
1,843
162ms
30 Nov 2025
Tongue-twisters
KatieLG
497
159ms
30 Nov 2025
Smith Numbers
KatieLG
1,647
172ms
30 Nov 2025
Sierpiński Triangle
KatieLG
222
152ms
30 Nov 2025
Rule 110
KatieLG
2,057
184ms
30 Nov 2025
Recamán
KatieLG
807
179ms
30 Nov 2025
Prime Numbers (Long)
KatieLG
4,283
172ms
30 Nov 2025
Prime Numbers
KatieLG
98
182ms
30 Nov 2025
Polyominoes
KatieLG
1,351
175ms
30 Nov 2025
Pernicious Numbers (Long)
KatieLG
14,046
148ms
30 Nov 2025
Pernicious Numbers
KatieLG
127
177ms
30 Nov 2025
Pascal’s Triangle
KatieLG
694
183ms
30 Nov 2025
Partition Numbers
KatieLG
661
180ms
30 Nov 2025
Odious Numbers (Long)
KatieLG
1,663
175ms
30 Nov 2025