The
Calendar
hole will go live in approximately
7 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
Recamán
HumanoidCPU
89
102ms
33 hours ago
Recamán
HumanoidCPU
156
3ms
37 hours ago
Recamán
CommandLeo
71
11ms
46 hours ago
Recamán
AlephSquirrel
56
8ms
6 days ago
Recamán
sunleonid
62
11ms
6 days ago
Recamán
JOrE20
2,654
2ms
6 days ago
Recamán
Lydxn
🥇
61
32ms
7 days ago
Recamán
Lydxn
🥇
57
416ms
7 days ago
Recamán
KasperKivimaeki
91
59ms
7 days ago
Recamán
TheZwierzLF
61
32ms
8 days ago
Recamán
ryyyn
65
29ms
9 days ago
Recamán
dokutan
573
64ms
11 days ago
Recamán
dokutan
🥉
464
91ms
11 days ago
Recamán
ovs-code
🥇
74
134ms
12 days ago
Recamán
Maashau
913
2ms
12 days ago
Recamán
Adix-null
101
369ms
12 days ago
Recamán
dokutan
598
808ms
14 days ago
Recamán
GrayJoKing
💎
56
62ms
14 days ago
Recamán
Andrey2001
75
16ms
15 days ago
Recamán
ovs-code
🥈
53
80ms
15 days ago
Recamán
kaascevich
112
90ms
16 days ago
Recamán
HumanoidCPU
950
266ms
17 days ago
Recamán
albanian-laundromat
63
10ms
17 days ago
Recamán
snoozingnewt
307
26ms
17 days ago
Recamán
JOrE20
753
7ms
17 days ago
Recamán
sean-niemann
🥈
54
738ms
18 days ago
Recamán
canissimia
💎
46
2ms
18 days ago
Recamán
snoozingnewt
💎
100
114ms
19 days ago
Recamán
albanian-laundromat
🥉
224
11ms
19 days ago
Recamán
Lv0Sys
64
9ms
19 days ago
Recamán
Lv0Sys
75
10ms
19 days ago
Recamán
Lv0Sys
59
36ms
19 days ago
Recamán
Shanethegamer
917
96ms
20 days ago
Recamán
azure-blondon
123
149ms
21 days ago
Recamán
CaedenHarper
1,168
105ms
22 days ago
Recamán
JOrE20
169
8ms
22 days ago
Recamán
luuumine
89
3ms
23 days ago
Recamán
KatieLG
807
1,269ms
24 days ago
Recamán
KatieLG
785
122ms
24 days ago
Recamán
KatieLG
769
8ms
24 days ago
Recamán
KatieLG
801
97ms
24 days ago
Recamán
KatieLG
800
627ms
24 days ago
Recamán
KatieLG
778
80ms
24 days ago
Recamán
KatieLG
815
309ms
24 days ago
Recamán
KatieLG
807
179ms
24 days ago
Recamán
KatieLG
811
74ms
24 days ago
Recamán
KatieLG
818
210ms
24 days ago
Recamán
KatieLG
743
3ms
24 days ago
Recamán
KatieLG
819
5ms
24 days ago
Recamán
KatieLG
801
2,901ms
24 days ago
Recamán
KatieLG
835
370ms
24 days ago
Recamán
KatieLG
859
259ms
24 days ago
Recamán
KatieLG
824
104ms
24 days ago
Recamán
KatieLG
831
13ms
24 days ago
Recamán
KatieLG
849
2ms
24 days ago
Recamán
KatieLG
803
130ms
24 days ago
Recamán
snoozingnewt
63
11ms
24 days ago
Recamán
snoozingnewt
64
359ms
24 days ago
Recamán
DialFrost
🥈
101
93ms
24 days ago
Recamán
h3ra993huskp
113
432ms
24 days ago
Recamán
tigerdan2
105
356ms
24 days ago
Recamán
HPWiz
63
9ms
24 Nov 2025
Recamán
TheZwierzLF
69
446ms
24 Nov 2025
Recamán
JayXon
🥇
61
29ms
24 Nov 2025
Recamán
KatieLG
907
1ms
21 Nov 2025
Recamán
KatieLG
1,154
2ms
21 Nov 2025
Recamán
KatieLG
1,188
5ms
21 Nov 2025
Recamán
jkelly467
84
4,160ms
21 Nov 2025
Recamán
tomh1012
99
365ms
21 Nov 2025
Recamán
tomh1012
71
9ms
21 Nov 2025
Recamán
albanian-laundromat
88
70ms
20 Nov 2025
Recamán
KatieLG
798
68ms
18 Nov 2025
Recamán
KatieLG
834
14ms
18 Nov 2025
Recamán
09cf
68
10ms
17 Nov 2025
Recamán
namelessiw
99
383ms
15 Nov 2025
Recamán
Yewzir
197
2,570ms
14 Nov 2025
Recamán
luuumine
118
146ms
13 Nov 2025
Recamán
alexsave
74
9ms
13 Nov 2025
Recamán
HumanoidCPU
1,154
1ms
12 Nov 2025
Recamán
Shanethegamer
1,154
1ms
12 Nov 2025