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Kaprekar Numbers
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2 days
. Why not try and solve it ahead of time?
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Golfers
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12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
Abundant Numbers (Long)
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Arrows
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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
Rijndael S-box
emgordon154
🥉
808
12 days ago
12 Days of Christmas
dokutan
🥉
725
12 days ago
Tongue-twisters
dokutan
501
13 days ago
Recamán
dokutan
864
13 days ago
Emirp Numbers (Long)
dokutan
1,031
15 days ago
N Queens
dokutan
🥈
1,213
15 days ago
Polyominoes
dokutan
💎
1,325
15 days ago
Quine
CaedenHarper
7,300
15 days ago
Fizz Buzz
aliakseikalosha
373
19 days ago
Quine
sean-niemann
247
19 days ago
Kolakoski Sequence
dokutan
463
21 days ago
Inventory Sequence
dokutan
1,720
21 days ago
Farey Sequence
dokutan
2,647
21 days ago
Factorial Factorisation
dokutan
💎
893
21 days ago
Gijswijt’s Sequence
dokutan
💎
288
21 days ago
Sierpiński Triangle
dokutan
647
22 days ago
Fizz Buzz
sean-niemann
239
24 days ago
Lucky Numbers
sean-niemann
🥈
290
24 days ago
Fibonacci
sean-niemann
🥇
141
24 days ago
Card Number Validation
MeWhenI
🦄
331
27 days ago
Arithmetic Numbers
dokutan
419
27 days ago
Ordinal Numbers
dokutan
18,015
28 Sep 2024
Foo Fizz Buzz Bar
dokutan
474
28 Sep 2024
Fizz Buzz
dokutan
271
28 Sep 2024
Prime Numbers (Long)
dokutan
298
28 Sep 2024
Leap Years
dokutan
251
28 Sep 2024
Divisors
dokutan
258
28 Sep 2024
Pernicious Numbers (Long)
dokutan
347
28 Sep 2024
Odious Numbers (Long)
dokutan
324
28 Sep 2024
Evil Numbers (Long)
dokutan
325
28 Sep 2024
Niven Numbers (Long)
dokutan
329
28 Sep 2024
Abundant Numbers (Long)
dokutan
271
28 Sep 2024
Rule 110
KatieLG
16,486
28 Sep 2024
Pernicious Numbers (Long)
KatieLG
20,711
28 Sep 2024
Cubes
KatieLG
4,717
28 Sep 2024
Christmas Trees
KatieLG
810
28 Sep 2024
99 Bottles of Beer
KatieLG
12,128
28 Sep 2024
24 Game
KatieLG
🥈
12,475
28 Sep 2024
Star Wars Opening Crawl
KatieLG
🥉
6,452
28 Sep 2024
Van Eck Sequence
KatieLG
2,595
28 Sep 2024
Vampire Numbers
KatieLG
🥈
1,111
28 Sep 2024
Tongue-twisters
KatieLG
568
28 Sep 2024
Smith Numbers
KatieLG
🥉
1,864
28 Sep 2024
Recamán
KatieLG
937
28 Sep 2024
Prime Numbers (Long)
KatieLG
5,988
28 Sep 2024
Pascal’s Triangle
KatieLG
809
28 Sep 2024
Odious Numbers (Long)
KatieLG
1,985
28 Sep 2024
Number Spiral
KatieLG
343
28 Sep 2024
Niven Numbers (Long)
KatieLG
7,481
28 Sep 2024
N Queens
KatieLG
🥉
1,286
28 Sep 2024
Lucky Numbers
KatieLG
4,860
28 Sep 2024
Look and Say
KatieLG
1,319
28 Sep 2024
Leyland Numbers
KatieLG
🥉
926
28 Sep 2024
Leap Years
KatieLG
770
28 Sep 2024
Inventory Sequence
KatieLG
2,663
28 Sep 2024
Happy Numbers (Long)
KatieLG
592
28 Sep 2024
Gijswijt’s Sequence
KatieLG
2,040
28 Sep 2024
Foo Fizz Buzz Bar
KatieLG
5,759
28 Sep 2024
Fizz Buzz
KatieLG
453
28 Sep 2024
Farey Sequence
KatieLG
4,394
28 Sep 2024
Evil Numbers (Long)
KatieLG
1,990
28 Sep 2024
Emirp Numbers (Long)
KatieLG
1,196
28 Sep 2024
Divisors
KatieLG
1,206
28 Sep 2024
Collatz
KatieLG
3,266
28 Sep 2024
Catalan Numbers
KatieLG
🥉
2,912
28 Sep 2024
Ascending Primes
KatieLG
🥈
552
28 Sep 2024
Abundant Numbers (Long)
KatieLG
1,004
28 Sep 2024
12 Days of Christmas
KatieLG
2,475
28 Sep 2024
Arithmetic Numbers
KatieLG
37,697
28 Sep 2024
Rijndael S-box
KatieLG
🥉
808
27 Sep 2024
Sierpiński Triangle
KatieLG
681
27 Sep 2024
Diamonds
KatieLG
1,608
27 Sep 2024
Hexdump
MeWhenI
💎
5,558
26 Sep 2024
Hexdump
KatieLG
🥈
5,806
26 Sep 2024
𝑒
KatieLG
1,049
26 Sep 2024