Recent Solutions
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
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
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
All Languages
><>
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Common Lisp
Crystal
D
Dart
Elixir
F#
Factor
Forth
Fortran
Go
GolfScript
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
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
F#
Factor
Forth
Fortran
Go
GolfScript
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
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
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
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
Chars
Submitted
Look and Say
radarek
💎
52
46 mins ago
Diamonds
Quirkly-Quasar1
1,109
103 mins ago
Hexdump
DialFrost
115
3 hours ago
Happy Numbers
tatzyr
77
15 hours ago
Happy Numbers (Long)
tatzyr
77
15 hours ago
Vampire Numbers
tatzyr
99
15 hours ago
Billiards
error256
🥉
107
22 hours ago
Fibonacci
NicknamedTwice
29
24 hours ago
Leap Years
tatzyr
44
26 hours ago
Quine
tatzyr
🥇
25
26 hours ago
Fibonacci
tatzyr
26
27 hours ago
24 Game
tatzyr
190
27 hours ago
Billiards
tatzyr
124
27 hours ago
Niven Numbers (Long)
mrondon8
🥇
38
42 hours ago
Billiards
Shanethegamer
118
43 hours ago
Billiards
Natanaelel
111
2 days ago
Roman to Arabic
pardouin
57
2 days ago
Emirp Numbers (Long)
pardouin
66
2 days ago
Diamonds
pardouin
60
2 days ago
Billiards
pardouin
💎
79
2 days ago
Billiards
stefangimmillaro
114
2 days ago
Abundant Numbers (Long)
mrondon8
🥉
46
2 days ago
𝑒
NicknamedTwice
61
2 days ago
Reversi
emgordon154
89
2 days ago
Billiards
emgordon154
117
3 days ago
Billiards
KatieLG
14,509
3 days ago
Billiards
MeWhenI
120
3 days ago
Farey Sequence
aksyristos
81
4 days ago
Christmas Trees
tatzyr
67
4 days ago
Rule 110
tatzyr
126
5 days ago
Collatz
AbrahamJLR
56
5 days ago
Pascal’s Triangle
FlyingPenguin223
48
5 days ago
Repeating Decimals
NicknamedTwice
217
6 days ago
Van Eck Sequence
emgordon154
52
6 days ago
CSS Colors
NicknamedTwice
2,082
6 days ago
Kolakoski Sequence
emgordon154
52
7 days ago
Billiards
ovs-code
🥈
105
8 days ago
ln 2
edsrzf
66
8 days ago
Quine
Quirkly-Quasar
28
9 days ago
Sierpiński Triangle
tatzyr
63
9 days ago
PalindromemordnilaP
tatzyr
61
9 days ago
Factorial Factorisation
tatzyr
71
9 days ago
ln 2
tatzyr
57
10 days ago
99 Bottles of Beer
tatzyr
153
10 days ago
Jacobi Symbol
tatzyr
94
10 days ago
Fizz Buzz
edsrzf
🥉
50
10 days ago
Leyland Numbers
tatzyr
58
10 days ago
Emirp Numbers
tatzyr
67
10 days ago
Emirp Numbers (Long)
tatzyr
67
10 days ago
ISBN
tatzyr
66
10 days ago
Ordinal Numbers
tatzyr
55
10 days ago
Fizz Buzz
Quirkly-Quasar
68
11 days ago
DFA Simulator
emgordon154
131
11 days ago
Divisors
edsrzf
46
11 days ago
Leap Years
edsrzf
53
11 days ago
Day of Week
edsrzf
53
11 days ago
Kaprekar Numbers
JayXon
🥉
63
11 days ago
Fibonacci
madeforlosers
35
12 days ago
PalindromemordnilaP
DialFrost
63
12 days ago
Maze
error256
141
13 days ago
Foo Fizz Buzz Bar
radarek
🥈
66
13 days ago
Morse Encoder
gotbadger
231
13 days ago
Maze
stefangimmillaro
91
13 days ago
Reverse Polish Notation
emgordon154
72
13 days ago
Morse Encoder
didroe
157
13 days ago
Intersection
emgordon154
105
14 days ago
Rijndael S-box
emgordon154
194
14 days ago
ISBN
DialFrost
72
14 days ago
Zodiac Signs
stefangimmillaro
110
14 days ago
Number Spiral
error256
79
14 days ago
Kaprekar Numbers
emgordon154
83
15 days ago
Pascal’s Triangle
NicknamedTwice
🥉
43
15 days ago
Inventory Sequence
emgordon154
50
15 days ago
Star Wars Opening Crawl
emgordon154
285
15 days ago
ASCII Table
emgordon154
102
15 days ago