The
Calendar
hole will go live in approximately
20 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
Reversi
rhdqor213
💎
136
2ms
29 hours ago
Reversi
YAJUE114514
220
14ms
2 days ago
Reversi
dokutan
172
24ms
3 days ago
Reversi
JOrE20
358
11ms
6 days ago
Reversi
madex
253
25ms
8 days ago
Reversi
madex
183
2ms
8 days ago
Reversi
albanian-laundromat
🥈
258
123ms
9 days ago
Reversi
snoozingnewt
106
343ms
16 days ago
Reversi
snoozingnewt
106
25ms
16 days ago
Reversi
Emutis
140
23ms
18 days ago
Reversi
CaedenHarper
231
572ms
19 days ago
Reversi
CaedenHarper
232
22ms
19 days ago
Reversi
Lv0Sys
349
254ms
19 days ago
Reversi
Lv0Sys
284
19ms
19 days ago
Reversi
blaztoma
86
5ms
19 days ago
Reversi
canissimia
💎
108
14ms
19 days ago
Reversi
blaztoma
138
24ms
19 days ago
Reversi
edsrzf
125
17ms
21 days ago
Reversi
rucin93
🥉
233
45ms
22 days ago
Reversi
anter69
793
13ms
26 days ago
Reversi
h3ra993huskp
274
662ms
30 Nov 2025
Reversi
edsrzf
💎
164
159ms
28 Nov 2025
Reversi
blaztoma
🥈
377
126ms
28 Nov 2025
Reversi
AidanWalter
1,869
14ms
28 Nov 2025
Reversi
FortuiteMan
334
22ms
27 Nov 2025
Reversi
albanian-laundromat
🥉
348
909ms
27 Nov 2025
Reversi
albanian-laundromat
💎
183
179ms
25 Nov 2025
Reversi
CornerMercury
111
1,483ms
24 Nov 2025
Reversi
guilhem-roy
212
2,297ms
22 Nov 2025
Reversi
snoozingnewt
🥈
133
88ms
22 Nov 2025
Reversi
edsrzf
🥇
83
9ms
21 Nov 2025
Reversi
error256
🥇
83
80ms
21 Nov 2025
Reversi
snoozingnewt
252
106ms
20 Nov 2025
Reversi
CaedenHarper
327
288ms
20 Nov 2025
Reversi
albanian-laundromat
117
65ms
17 Nov 2025
Reversi
stefangabos
313
11ms
17 Nov 2025
Reversi
albanian-laundromat
🥉
110
1,573ms
16 Nov 2025
Reversi
tomh1012
384
422ms
12 Nov 2025
Reversi
stefangimmillaro
124
36ms
12 Nov 2025
Reversi
edsrzf
191
489ms
11 Nov 2025
Reversi
MeWhenI
💎
250
1,779ms
7 Nov 2025
Reversi
MeWhenI
170
628ms
7 Nov 2025
Reversi
ryyyn
123
26ms
5 Nov 2025
Reversi
edsrzf
💎
116
6ms
4 Nov 2025
Reversi
sean-niemann
🥈
132
149ms
3 Nov 2025
Reversi
gigaprofisi
308
11ms
1 Nov 2025
Reversi
kg583
💎
161
985ms
1 Nov 2025
Reversi
Babafaba
194
413ms
30 Oct 2025
Reversi
Babafaba
198
21ms
30 Oct 2025
Reversi
iczelia
499
14ms
23 Oct 2025
Reversi
namelessiw
🥉
174
352ms
22 Oct 2025
Reversi
aiwana
135
42ms
22 Oct 2025
Reversi
CaedenHarper
309
423ms
21 Oct 2025
Reversi
Yax42
261
860ms
16 Oct 2025
Reversi
namelessiw
208
792ms
16 Oct 2025
Reversi
Yax42
245
135ms
7 Oct 2025
Reversi
Yax42
421
135ms
7 Oct 2025
Reversi
CaedenHarper
343
739ms
7 Oct 2025
Reversi
KatieLG
126
3,150ms
6 Oct 2025
Reversi
stefangimmillaro
174
579ms
6 Oct 2025
Reversi
aksyristos
852
13ms
5 Oct 2025
Reversi
BREMAUCY
186
22ms
4 Oct 2025
Reversi
qpwoeirut
107
23ms
1 Oct 2025
Reversi
CaedenHarper
237
1,438ms
30 Sep 2025
Reversi
jerrandolph
363
275ms
29 Sep 2025
Reversi
JayXon
🥉
160
669ms
28 Sep 2025
Reversi
CaedenHarper
249
11ms
25 Sep 2025
Reversi
nwellnhof
162
711ms
25 Sep 2025
Reversi
sean-niemann
🥈
158
544ms
24 Sep 2025
Reversi
error256
💎
148
554ms
24 Sep 2025
Reversi
dokutan
290
991ms
24 Sep 2025
Reversi
Shanethegamer
231
552ms
24 Sep 2025
Reversi
mousetail
183
2ms
23 Sep 2025
Reversi
mousetail
💎
218
153ms
23 Sep 2025
Reversi
InigoK
205
22ms
22 Sep 2025
Reversi
mousetail
230
23ms
22 Sep 2025
Reversi
albanian-laundromat
🥈
463
16ms
18 Sep 2025
Reversi
kg583
🥉
107
11ms
15 Sep 2025
Reversi
KatieLG
126
2,640ms
15 Sep 2025
Reversi
MeWhenI
145
944ms
15 Sep 2025