The
Calendar
hole will go live in approximately
11 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
All Languages
><>
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
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
Bytes
Chars
Scoring
Bytes
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
Vampire Numbers
albanian-laundromat
💎
167
4,940ms
7 hours ago
Ascending Primes
albanian-laundromat
💎
154
191ms
40 hours ago
Fibonacci
Pyroan
84
108ms
2 days ago
Arrows
bitsandbeyond
🥉
172
122ms
3 days ago
γ
JOrE20
1,011
73ms
3 days ago
Tongue-twisters
albanian-laundromat
331
94ms
3 days ago
Divisors
albanian-laundromat
64
106ms
3 days ago
Arithmetic Numbers
albanian-laundromat
150
4,306ms
3 days ago
Christmas Trees
albanian-laundromat
102
90ms
3 days ago
Maze
albanian-laundromat
🥈
180
442ms
3 days ago
Tower of Hanoi
albanian-laundromat
🥉
85
85ms
3 days ago
Smooth Numbers
GolfingSuccess
109
292ms
4 days ago
Tutorial
GolfingSuccess
64
86ms
4 days ago
Abundant Numbers
DialFrost
71
84ms
4 days ago
𝑒
dokutan
665
63ms
7 days ago
√2
dokutan
665
64ms
7 days ago
φ
dokutan
661
64ms
7 days ago
τ
dokutan
669
65ms
7 days ago
π
dokutan
669
65ms
7 days ago
λ
dokutan
665
66ms
7 days ago
γ
dokutan
661
62ms
7 days ago
Van Eck Sequence
dokutan
1,301
64ms
7 days ago
Vampire Numbers
dokutan
701
65ms
7 days ago
Tower of Hanoi
dokutan
161
67ms
7 days ago
Smith Numbers
dokutan
1,121
65ms
7 days ago
Sierpiński Triangle
dokutan
169
65ms
7 days ago
Rule 110
dokutan
🥉
1,133
65ms
7 days ago
Rijndael S-box
dokutan
🥉
577
64ms
7 days ago
Recamán
dokutan
573
64ms
7 days ago
Polyominoes
dokutan
🥉
933
65ms
7 days ago
Pascal’s Triangle
dokutan
477
62ms
7 days ago
Number Spiral
dokutan
249
61ms
7 days ago
N Queens
dokutan
701
63ms
7 days ago
Mandelbrot
dokutan
🥉
293
62ms
7 days ago
Lucky Numbers
dokutan
2,785
62ms
7 days ago
Look and Say
dokutan
349
63ms
7 days ago
ln 2
dokutan
661
69ms
7 days ago
Leyland Numbers
dokutan
597
70ms
7 days ago
Kolakoski Sequence
dokutan
205
69ms
7 days ago
Kolakoski Constant
dokutan
665
68ms
7 days ago
Kaprekar Numbers
dokutan
🥈
341
63ms
7 days ago
Inventory Sequence
dokutan
1,125
62ms
7 days ago
Hilbert Curve
dokutan
💎
437
63ms
7 days ago
Hexagonal Spiral
dokutan
241
62ms
7 days ago
Happy Numbers (Long)
dokutan
385
62ms
7 days ago
Gijswijt’s Sequence
dokutan
129
61ms
7 days ago
Farey Sequence
dokutan
2,021
62ms
7 days ago
Factorial Factorisation
dokutan
453
66ms
7 days ago
Emirp Numbers (Long)
dokutan
705
65ms
7 days ago
Emirp Numbers
dokutan
141
64ms
7 days ago
Diamonds
dokutan
149
63ms
7 days ago
Cubes
dokutan
477
61ms
7 days ago
Catalan’s Constant
dokutan
661
61ms
7 days ago
Ascending Primes
dokutan
🥉
345
64ms
7 days ago
24 Game
dokutan
2,481
63ms
7 days ago
12 Days of Christmas
dokutan
477
66ms
7 days ago
Tongue-twisters
dokutan
309
62ms
7 days ago
Trinomial Triangle
dokutan
1,081
64ms
7 days ago
Game of Life
kmathis22
394
447ms
7 days ago
𝑒
kurkale6ka
1,011
65ms
8 days ago
Tutorial
kurkale6ka
137
95ms
8 days ago
Prime Numbers
tomh1012
71
70ms
9 days ago
Game of Life
Lv0Sys
275
137ms
9 days ago
Diamonds
albanian-laundromat
123
70ms
11 days ago
γ
albanian-laundromat
🥈
563
214ms
11 days ago
λ
edsrzf
💎
228
97ms
12 days ago
Quine
CornerMercury
🥇
44
66ms
12 days ago
Pangram Grep
ndren
489
73ms
12 days ago
Foo Fizz Buzz Bar
snoozingnewt
140
96ms
13 days ago
Pangram Grep
snoozingnewt
69
79ms
13 days ago
Evil Numbers
snoozingnewt
🥇
48
66ms
13 days ago
Odious Numbers
snoozingnewt
🥇
47
62ms
13 days ago
Emirp Numbers
snoozingnewt
83
64ms
13 days ago
Happy Numbers
snoozingnewt
63
65ms
13 days ago
Niven Numbers
snoozingnewt
🥇
49
67ms
13 days ago
Gray Code Decoder
albanian-laundromat
69
475ms
14 days ago
Quine
JOrE20
🥇
44
66ms
14 days ago
Tongue-twisters
prestosilver
544
68ms
16 days ago
Spelling Numbers
dokutan
23,957
2,315ms
18 days ago
Lucky Tickets
dokutan
5,138
78ms
18 days ago