The
Calendar
hole will go live in approximately
9 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
Sudoku
canissimia
💎
318
2,915ms
3 days ago
Sudoku
kmathis22
949
658ms
3 days ago
Sudoku
kurkale6ka
1,151
11ms
6 days ago
Sudoku
CornerMercury
467
34ms
7 days ago
Sudoku
acotis
🥈
520
227ms
15 days ago
Sudoku
ryyyn
404
146ms
18 days ago
Sudoku
alexsave
1,094
1,160ms
18 days ago
Sudoku
dokutan
743
1,763ms
19 days ago
Sudoku
dokutan
752
31ms
19 days ago
Sudoku
Lv0Sys
478
11ms
19 days ago
Sudoku
JOrE20
818
14ms
19 days ago
Sudoku
Lv0Sys
590
25ms
19 days ago
Sudoku
bitsandbeyond
💎
278
1,363ms
19 days ago
Sudoku
blaztoma
🦄
789
292ms
20 days ago
Sudoku
h3ra993huskp
980
766ms
22 days ago
Sudoku
AlephSquirrel
🥉
812
849ms
25 days ago
Sudoku
ndren
560
55ms
26 days ago
Sudoku
blaztoma
547
17ms
26 days ago
Sudoku
KatieLG
919
463ms
21 Nov 2025
Sudoku
snoozingnewt
🥉
618
233ms
21 Nov 2025
Sudoku
snoozingnewt
🥉
660
4,008ms
21 Nov 2025
Sudoku
snoozingnewt
516
1,150ms
20 Nov 2025
Sudoku
snoozingnewt
524
37ms
20 Nov 2025
Sudoku
targrik
🥉
583
82ms
19 Nov 2025
Sudoku
sean-niemann
💎
554
260ms
19 Nov 2025
Sudoku
KasperKivimaeki
🥉
396
3,079ms
18 Nov 2025
Sudoku
Yax42
523
479ms
16 Nov 2025
Sudoku
MeWhenI
🥈
517
2,302ms
7 Nov 2025
Sudoku
emgordon154
💎
215
571ms
7 Nov 2025
Sudoku
albanian-laundromat
🥈
399
2,106ms
7 Nov 2025
Sudoku
lynn
🥉
528
214ms
6 Nov 2025
Sudoku
Natanaelel
446
11ms
5 Nov 2025
Sudoku
CaedenHarper
852
295ms
4 Nov 2025
Sudoku
madeforlosers
624
17ms
3 Nov 2025
Sudoku
robin-scragg
775
12ms
1 Nov 2025
Sudoku
CaedenHarper
484
2,095ms
31 Oct 2025
Sudoku
CaedenHarper
500
55ms
31 Oct 2025
Sudoku
Babafaba
687
1,885ms
26 Oct 2025
Sudoku
Babafaba
702
750ms
26 Oct 2025
Sudoku
CaedenHarper
1,014
475ms
21 Oct 2025
Sudoku
albanian-laundromat
🦄
975
822ms
18 Oct 2025
Sudoku
InigoK
505
167ms
9 Oct 2025
Sudoku
CaedenHarper
1,039
659ms
8 Oct 2025
Sudoku
stefangimmillaro
548
662ms
6 Oct 2025
Sudoku
BREMAUCY
597
18ms
4 Oct 2025
Sudoku
pardouin
295
313ms
3 Oct 2025
Sudoku
bzijlema
403
581ms
2 Oct 2025
Sudoku
CaedenHarper
🥉
547
4,193ms
27 Sep 2025
Sudoku
JayXon
💎
385
945ms
27 Sep 2025
Sudoku
edsrzf
💎
358
1,669ms
26 Sep 2025
Sudoku
sean-niemann
🥉
523
811ms
24 Sep 2025
Sudoku
KatieLG
1,559
1,369ms
24 Sep 2025
Sudoku
AlexKent3141
940
3ms
17 Sep 2025
Sudoku
albanian-laundromat
474
12ms
16 Sep 2025
Sudoku
albanian-laundromat
476
1,638ms
15 Sep 2025
Sudoku
cros107
479
297ms
7 Sep 2025
Sudoku
pardouin
330
1,464ms
6 Sep 2025
Sudoku
HumanoidCPU
659
2,060ms
6 Sep 2025
Sudoku
HumanoidCPU
670
11ms
6 Sep 2025
Sudoku
albanian-laundromat
💎
523
30ms
6 Sep 2025
Sudoku
edsrzf
🥈
1,037
111ms
5 Sep 2025
Sudoku
commandblockguy
499
1,712ms
1 Sep 2025
Sudoku
CaedenHarper
665
15ms
31 Aug 2025
Sudoku
KatieLG
2,664
132ms
25 Aug 2025
Sudoku
KatieLG
2,853
789ms
25 Aug 2025
Sudoku
kg583
💎
525
4,810ms
25 Aug 2025
Sudoku
Upload-and-View
1,176
13ms
21 Aug 2025
Sudoku
emgordon154
🥈
475
4,714ms
14 Aug 2025
Sudoku
namelessiw
🥉
422
410ms
14 Aug 2025
Sudoku
AdrienHache
471
478ms
13 Aug 2025
Sudoku
primo-ppcg
💎
911
21ms
13 Aug 2025
Sudoku
gigaprofisi
1,502
26ms
12 Aug 2025
Sudoku
Kacarott
🥈
814
209ms
8 Aug 2025
Sudoku
Zhenyu-Bo
2,074
18ms
1 Aug 2025
Sudoku
LuisGoncalves05
1,736
227ms
31 Jul 2025
Sudoku
klixel
951
30ms
20 Jul 2025
Sudoku
RaBa21
901
84ms
17 Jul 2025
Sudoku
FortuiteMan
640
316ms
14 Jul 2025
Sudoku
acollett89
1,745
14ms
11 Jul 2025
Sudoku
Flekay
804
27ms
10 Jul 2025