The
Calendar
hole will go live in approximately
24 hours
. Why not try and solve it ahead of time?
Recent Solutions
Prev Hole
Play Hole
Next Hole
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
Chars
Time
Submitted
Kolakoski Constant
JOrE20
1,009
2ms
33 hours ago
Kolakoski Constant
JayXon
💎
193
1,728ms
2 days ago
Kolakoski Constant
emgordon154
🥈
201
1,702ms
2 days ago
Kolakoski Constant
dokutan
752
412ms
3 days ago
Kolakoski Constant
KatieLG
123
109ms
3 days ago
Kolakoski Constant
HumanoidCPU
542
680ms
3 days ago
Kolakoski Constant
dokutan
383
3ms
4 days ago
Kolakoski Constant
blaztoma
🥇
164
102ms
6 days ago
Kolakoski Constant
jared-hughes
🥉
152
395ms
6 days ago
Kolakoski Constant
jkelly467
156
2,652ms
7 days ago
Kolakoski Constant
sean-niemann
💎
130
168ms
7 days ago
Kolakoski Constant
TheZwierzLF
107
2,714ms
9 days ago
Kolakoski Constant
TheZwierzLF
142
2,667ms
9 days ago
Kolakoski Constant
TheZwierzLF
152
2,053ms
9 days ago
Kolakoski Constant
AlephSquirrel
57
1,028ms
10 days ago
Kolakoski Constant
JOrE20
427
4ms
10 days ago
Kolakoski Constant
FortuiteMan
113
67ms
12 days ago
Kolakoski Constant
JOrE20
937
194ms
12 days ago
Kolakoski Constant
JOrE20
324
12ms
12 days ago
Kolakoski Constant
JOrE20
272
34ms
12 days ago
Kolakoski Constant
edsrzf
151
427ms
12 days ago
Kolakoski Constant
Andrey2001
1,011
10ms
13 days ago
Kolakoski Constant
sean-niemann
💎
149
76ms
14 days ago
Kolakoski Constant
ravnskjaer
659
341ms
15 days ago
Kolakoski Constant
sisyphus-ppcg
🥇
71
1,217ms
15 days ago
Kolakoski Constant
dokutan
362
64ms
18 days ago
Kolakoski Constant
dokutan
385
794ms
18 days ago
Kolakoski Constant
dokutan
214
90ms
18 days ago
Kolakoski Constant
Maashau
1,019
1ms
19 days ago
Kolakoski Constant
CaedenHarper
91
384ms
20 days ago
Kolakoski Constant
CaedenHarper
91
12ms
20 days ago
Kolakoski Constant
canissimia
💎
202
4,934ms
21 days ago
Kolakoski Constant
snoozingnewt
🥇
164
103ms
24 days ago
Kolakoski Constant
Shanethegamer
1,006
2ms
24 days ago
Kolakoski Constant
HumanoidCPU
1,006
2ms
24 days ago
Kolakoski Constant
snoozingnewt
79
357ms
24 days ago
Kolakoski Constant
snoozingnewt
79
10ms
24 days ago
Kolakoski Constant
kmathis22
223
681ms
24 days ago
Kolakoski Constant
JOrE20
1,008
5ms
25 days ago
Kolakoski Constant
emgordon154
🥉
172
109ms
25 days ago
Kolakoski Constant
Lv0Sys
110
10ms
26 days ago
Kolakoski Constant
Lv0Sys
94
81ms
26 days ago
Kolakoski Constant
HumanoidCPU
1,086
10ms
26 days ago
Kolakoski Constant
JOrE20
937
44ms
27 days ago
Kolakoski Constant
prestosilver
1,019
1ms
2 Dec 2025
Kolakoski Constant
CaedenHarper
1,025
109ms
1 Dec 2025
Kolakoski Constant
ryyyn
84
62ms
1 Dec 2025
Kolakoski Constant
dokutan
🥉
425
41ms
1 Dec 2025
Kolakoski Constant
JOrE20
1,007
3ms
1 Dec 2025
Kolakoski Constant
JOrE20
1,003
1ms
1 Dec 2025
Kolakoski Constant
JOrE20
1,021
27ms
1 Dec 2025
Kolakoski Constant
JOrE20
1,025
101ms
30 Nov 2025
Kolakoski Constant
KatieLG
1,007
94ms
30 Nov 2025
Kolakoski Constant
KatieLG
998
5ms
30 Nov 2025
Kolakoski Constant
KatieLG
1,010
91ms
30 Nov 2025
Kolakoski Constant
KatieLG
1,010
179ms
30 Nov 2025
Kolakoski Constant
KatieLG
991
3ms
30 Nov 2025
Kolakoski Constant
KatieLG
1,044
407ms
30 Nov 2025
Kolakoski Constant
KatieLG
1,003
793ms
30 Nov 2025
Kolakoski Constant
h3ra993huskp
291
641ms
30 Nov 2025
Kolakoski Constant
prestosilver
3,377
2ms
26 Nov 2025
Kolakoski Constant
xsot
🥉
109
367ms
25 Nov 2025
Kolakoski Constant
Carlos-EAC
1,046
972ms
24 Nov 2025
Kolakoski Constant
Carlos-EAC
1,011
9ms
24 Nov 2025
Kolakoski Constant
snoozingnewt
🥈
111
934ms
23 Nov 2025
Kolakoski Constant
JOrE20
988
7ms
22 Nov 2025
Kolakoski Constant
KatieLG
1,013
1ms
21 Nov 2025
Kolakoski Constant
KatieLG
1,011
2ms
21 Nov 2025
Kolakoski Constant
KatieLG
1,045
4ms
21 Nov 2025
Kolakoski Constant
namelessiw
29
365ms
21 Nov 2025
Kolakoski Constant
snoozingnewt
237
324ms
21 Nov 2025
Kolakoski Constant
HumanoidCPU
533
2ms
21 Nov 2025
Kolakoski Constant
CornerMercury
66
62ms
19 Nov 2025
Kolakoski Constant
sean-niemann
💎
146
949ms
19 Nov 2025
Kolakoski Constant
emgordon154
🥉
38
58ms
18 Nov 2025
Kolakoski Constant
CaedenHarper
243
274ms
17 Nov 2025
Kolakoski Constant
luuumine
1,023
108ms
16 Nov 2025
Kolakoski Constant
alexsave
107
21ms
15 Nov 2025
Kolakoski Constant
Yewzir
1,011
2ms
14 Nov 2025
Kolakoski Constant
Yewzir
🥉
362
2,344ms
14 Nov 2025