The
Calendar
hole will go live in approximately
3 days
. 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
Bytes
Time
Submitted
Rule 110
error256
🥇
96
68ms
61 mins ago
Rule 110
dokutan
1,252
3ms
28 hours ago
Rule 110
dokutan
1,268
733ms
28 hours ago
Rule 110
dokutan
1,276
393ms
28 hours ago
Rule 110
TheZwierzLF
114
84ms
31 hours ago
Rule 110
Shanethegamer
15,872
3ms
3 days ago
Rule 110
KatieLG
🥉
242
48ms
4 days ago
Rule 110
sean-niemann
🥈
116
3ms
5 days ago
Rule 110
YAJUE114514
112
11ms
9 days ago
Rule 110
ovs-code
💎
89
101ms
9 days ago
Rule 110
bizy-coder
71
10ms
13 days ago
Rule 110
edsrzf
💎
130
107ms
13 days ago
Rule 110
sisyphus-ppcg
71
9ms
13 days ago
Rule 110
TheZwierzLF
141
13ms
14 days ago
Rule 110
dokutan
🥉
1,133
65ms
16 days ago
Rule 110
dokutan
1,238
399ms
16 days ago
Rule 110
dokutan
1,147
98ms
16 days ago
Rule 110
CaedenHarper
77
430ms
18 days ago
Rule 110
CaedenHarper
77
10ms
18 days ago
Rule 110
CaedenHarper
114
9ms
18 days ago
Rule 110
CaedenHarper
🥉
76
805ms
18 days ago
Rule 110
GrayJoKing
🥇
96
63ms
19 days ago
Rule 110
Kacarott
105
62ms
19 days ago
Rule 110
JOrE20
325
11ms
20 days ago
Rule 110
JOrE20
244
16ms
20 days ago
Rule 110
HumanoidCPU
22,101
7ms
21 days ago
Rule 110
HumanoidCPU
16,452
7ms
21 days ago
Rule 110
HumanoidCPU
15,905
266ms
21 days ago
Rule 110
solisolu
103
11ms
21 days ago
Rule 110
HumanoidCPU
16,351
2ms
21 days ago
Rule 110
HumanoidCPU
15,860
2ms
23 days ago
Rule 110
sunleonid
71
10ms
23 days ago
Rule 110
JOrE20
1,960
2ms
24 days ago
Rule 110
tomh1012
233
411ms
24 days ago
Rule 110
targrik
107
18ms
24 days ago
Rule 110
blaztoma
78
12ms
24 days ago
Rule 110
blaztoma
🥉
152
101ms
24 days ago
Rule 110
Shanethegamer
15,872
120ms
24 days ago
Rule 110
HumanoidCPU
16,733
17ms
24 days ago
Rule 110
edsrzf
🥉
125
24ms
25 days ago
Rule 110
DialFrost
🥈
138
116ms
25 days ago
Rule 110
CaedenHarper
15,973
128ms
26 days ago
Rule 110
Lv0Sys
60
38ms
27 days ago
Rule 110
Lv0Sys
81
10ms
27 days ago
Rule 110
Lv0Sys
102
10ms
27 days ago
Rule 110
JOrE20
4,726
112ms
27 days ago
Rule 110
ScottHamper
🥈
134
548ms
30 Nov 2025
Rule 110
KatieLG
2,042
1,235ms
30 Nov 2025
Rule 110
KatieLG
2,054
140ms
30 Nov 2025
Rule 110
KatieLG
1,925
125ms
30 Nov 2025
Rule 110
KatieLG
2,036
98ms
30 Nov 2025
Rule 110
KatieLG
2,035
668ms
30 Nov 2025
Rule 110
KatieLG
2,050
297ms
30 Nov 2025
Rule 110
KatieLG
2,067
184ms
30 Nov 2025
Rule 110
KatieLG
2,218
73ms
30 Nov 2025
Rule 110
KatieLG
2,053
225ms
30 Nov 2025
Rule 110
KatieLG
1,840
3ms
30 Nov 2025
Rule 110
KatieLG
2,149
6ms
30 Nov 2025
Rule 110
KatieLG
2,036
3,145ms
30 Nov 2025
Rule 110
KatieLG
2,070
406ms
30 Nov 2025
Rule 110
KatieLG
2,228
254ms
30 Nov 2025
Rule 110
KatieLG
2,132
103ms
30 Nov 2025
Rule 110
KatieLG
1,884
686ms
30 Nov 2025
Rule 110
KatieLG
2,239
2ms
30 Nov 2025
Rule 110
KatieLG
2,147
137ms
30 Nov 2025
Rule 110
h3ra993huskp
245
502ms
30 Nov 2025
Rule 110
JOrE20
🥉
4,627
8ms
28 Nov 2025
Rule 110
AlephSquirrel
60
3ms
28 Nov 2025
Rule 110
HumanoidCPU
15,887
60ms
28 Nov 2025
Rule 110
IISResetMe
134
337ms
27 Nov 2025
Rule 110
AidanWalter
164
19ms
27 Nov 2025
Rule 110
ndren
75
15ms
26 Nov 2025
Rule 110
CornerMercury
75
24ms
26 Nov 2025
Rule 110
ian-h-chamberlain
356
264ms
23 Nov 2025
Rule 110
od86
289
42ms
22 Nov 2025
Rule 110
GodlyProgrammer1
124
11ms
21 Nov 2025
Rule 110
KatieLG
15,862
1ms
21 Nov 2025
Rule 110
KatieLG
15,959
2ms
21 Nov 2025
Rule 110
KatieLG
15,993
5ms
21 Nov 2025
Rule 110
snoozingnewt
146
115ms
19 Nov 2025