The
Kaprekar Numbers
hole will go live in
2 days
. Why not try and solve it ahead of time?
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Golfers
Solutions
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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
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
Intersection
Inventory Sequence
ISBN
Jacobi Symbol
Kolakoski Constant
Kolakoski Sequence
Leap Years
Levenshtein Distance
Leyland Numbers
ln 2
Look and Say
Lucky Numbers
Lucky Tickets
Mahjong
Maze
Medal Tally
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
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
Rule 110
Seven Segment
SI Units
Sierpiński Triangle
Smith Numbers
Spelling Numbers
Star Wars Opening Crawl
Sudoku
Sudoku (Fill-in)
Ten-pin Bowling
Time Distance
Tongue-twisters
Transpose Sentence
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
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Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Crystal
D
Dart
Elixir
F#
Factor
Forth
Fortran
Go
GolfScript
Haskell
Hexagony
J
Janet
Java
JavaScript
jq
Julia
K
Kotlin
Lisp
Lua
Nim
OCaml
Pascal
Perl
PHP
PowerShell
Prolog
Python
R
Raku
Rockstar
Ruby
Rust
Scheme
sed
SQL
Swift
Tcl
TeX
V
VimL
Wren
Zig
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
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
Intersection
Inventory Sequence
ISBN
Jacobi Symbol
Kolakoski Constant
Kolakoski Sequence
Leap Years
Levenshtein Distance
Leyland Numbers
ln 2
Look and Say
Lucky Numbers
Lucky Tickets
Mahjong
Maze
Medal Tally
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
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
Rule 110
Seven Segment
SI Units
Sierpiński Triangle
Smith Numbers
Spelling Numbers
Star Wars Opening Crawl
Sudoku
Sudoku (Fill-in)
Ten-pin Bowling
Time Distance
Tongue-twisters
Transpose Sentence
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Hole
Golfer
Bytes
Submitted
Kolakoski Constant
zacjl
💎
101
an hour ago
Catalan Numbers
zacjl
🥇
56
2 hours ago
Forsyth–Edwards Notation
Maximizer02
217
8 hours ago
N Queens
edsrzf
💎
168
10 hours ago
Pangram Grep
HumanoidCPU
135
21 hours ago
Time Distance
edsrzf
🥈
308
a day ago
Reversi
edsrzf
180
a day ago
Fibonacci
error256
💎
41
2 days ago
Catalan Numbers
error256
🥇
56
2 days ago
π
m4xxh
1,025
3 days ago
Ascending Primes
zacjl
💎
99
3 days ago
Collatz
edsrzf
89
3 days ago
Gijswijt’s Sequence
Shanethegamer
1,016
5 days ago
Quine
edsrzf
🥉
44
6 days ago
PalindromemordnilaP
edsrzf
140
6 days ago
Cubes
edsrzf
🥉
343
6 days ago
Rijndael S-box
edsrzf
🥈
367
6 days ago
Repeating Decimals
edsrzf
🥈
156
6 days ago
Transpose Sentence
error256
🥉
103
7 days ago
Medal Tally
edsrzf
🥉
214
7 days ago
Kolakoski Sequence
zacjl
💎
71
7 days ago
brainfuck
zacjl
💎
204
7 days ago
Arabic to Roman
error256
78
8 days ago
Divisors
error256
67
8 days ago
Divisors
zacjl
🥇
63
8 days ago
PalindromemordnilaP
error256
💎
88
8 days ago
Reversi
error256
🥈
143
8 days ago
CSS Colors
error256
💎
706
8 days ago
Look and Say
edsrzf
🥉
94
8 days ago
Intersection
edsrzf
🥈
153
8 days ago
Lucky Numbers
edsrzf
💎
106
8 days ago
brainfuck
edsrzf
🥉
247
8 days ago
Star Wars Opening Crawl
dokutan
🥈
5,354
8 days ago
Rule 110
edsrzf
🥉
172
8 days ago
Forsyth–Edwards Notation
edsrzf
💎
175
9 days ago
Rock-paper-scissors-Spock-lizard
edsrzf
🥈
287
9 days ago
Game of Life
edsrzf
151
10 days ago
Tongue-twisters
dokutan
🥉
365
10 days ago
Polyominoes
dokutan
🥉
1,150
10 days ago
Game of Life
zacjl
💎
129
10 days ago
Card Number Validation
dokutan
159
10 days ago
Game of Life
Shanethegamer
🥈
131
10 days ago
Leyland Numbers
edsrzf
141
10 days ago
Ordinal Numbers
edsrzf
🥈
97
11 days ago
Emojify
edsrzf
🥈
187
11 days ago
Seven Segment
edsrzf
🥈
164
11 days ago
Pernicious Numbers
edsrzf
61
12 days ago
ASCII Table
edsrzf
157
12 days ago
12 Days of Christmas
edsrzf
🥉
370
12 days ago
Roman to Arabic
edsrzf
156
13 days ago
Poker
edsrzf
🥈
464
14 days ago
12 Days of Christmas
Maximizer02
496
14 days ago
CSS Colors
edsrzf
🥉
760
14 days ago
Hexdump
edsrzf
💎
185
14 days ago
Fizz Buzz
aliakseikalosha
119
15 days ago
Happy Numbers
edsrzf
65
15 days ago
Emirp Numbers
edsrzf
85
15 days ago
Emirp Numbers (Long)
edsrzf
141
15 days ago
Prime Numbers
edsrzf
69
15 days ago
Prime Numbers (Long)
edsrzf
70
15 days ago
Foo Fizz Buzz Bar
edsrzf
124
15 days ago
Levenshtein Distance
edsrzf
🥉
172
15 days ago
ISBN
edsrzf
134
16 days ago
Arrows
edsrzf
244
16 days ago
φ
edsrzf
63
16 days ago
Niven Numbers (Long)
edsrzf
82
16 days ago
Arithmetic Numbers
error256
107
17 days ago
Vampire Numbers
zacjl
💎
136
17 days ago
Arithmetic Numbers
zacjl
💎
101
17 days ago
Pascal’s Triangle
edsrzf
91
17 days ago
United States
edsrzf
🥇
132
17 days ago
99 Bottles of Beer
edsrzf
💎
247
18 days ago
Prime Numbers
zacjl
🥇
47
18 days ago
Fizz Buzz
snoozingnewt
91
18 days ago
Prime Numbers (Long)
zacjl
🥇
60
18 days ago