Recent Solutions
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
Happy Numbers (Long)
DialFrost
105
3ms
a min ago
Partition Numbers
TheZwierzLF
100
32ms
a min ago
99 Bottles of Beer
amazingalek
293
349ms
2 mins ago
brainfuck
kurkale6ka
634
12ms
6 mins ago
brainfuck
kurkale6ka
1,393
3ms
8 mins ago
Rock-paper-scissors-Spock-lizard
TheZwierzLF
288
31ms
16 mins ago
Sudoku
kurkale6ka
1,151
11ms
22 mins ago
Collatz
albanian-laundromat
96
5ms
25 mins ago
Day of Week
JayXon
💎
228
302ms
28 mins ago
Reverse Polish Notation
kurkale6ka
204
10ms
47 mins ago
Arithmetic Numbers
DialFrost
102
1,317ms
47 mins ago
ROT13
kurkale6ka
74
11ms
55 mins ago
Minesweeper
kg583
💎
156
1,681ms
57 mins ago
Arithmetic Numbers
DialFrost
🥉
88
1,920ms
59 mins ago
Ten-pin Bowling
blaztoma
183
29ms
65 mins ago
Spelling Numbers
CornerMercury
347
13ms
66 mins ago
Kaprekar Numbers
bizy-coder
💎
55
434ms
68 mins ago
Abundant Numbers
DialFrost
73
1,229ms
74 mins ago
Abundant Numbers
DialFrost
71
84ms
78 mins ago
brainfuck
edsrzf
💎
300
103ms
80 mins ago
Abundant Numbers
DialFrost
84
25ms
80 mins ago
Abundant Numbers (Long)
DialFrost
85
303ms
83 mins ago
Abundant Numbers (Long)
DialFrost
🥇
73
54ms
87 mins ago
Abundant Numbers
DialFrost
73
9ms
88 mins ago
π
kurkale6ka
272
1,131ms
95 mins ago
Evil Numbers (Long)
emgordon154
72
52ms
110 mins ago
Evil Numbers (Long)
emgordon154
52
2ms
111 mins ago
Tower of Hanoi
emgordon154
90
51ms
115 mins ago
Niven Numbers
jkelly467
52
2,109ms
117 mins ago
φ
edsrzf
51
61ms
118 mins ago
Niven Numbers (Long)
jkelly467
🥇
54
2,166ms
119 mins ago
Intersection
kg583
127
5ms
119 mins ago
π
kurkale6ka
49
173ms
2 hours ago
Highly Composite Numbers
kurkale6ka
400
8ms
2 hours ago
Highly Composite Numbers
kurkale6ka
404
2ms
2 hours ago
Ten-pin Bowling
blaztoma
149
32ms
2 hours ago
Diamonds
kurkale6ka
1,108
32ms
2 hours ago
Diamonds
kurkale6ka
1,109
738ms
2 hours ago
Star Wars GPT
blaztoma
🥈
74
32ms
2 hours ago
Tutorial
kurkale6ka
100
236ms
2 hours ago
Abundant Numbers
kurkale6ka
150
9ms
2 hours ago
Intersection
emplv
🥈
103
9ms
2 hours ago
Day of Week
acotis
🥈
229
216ms
2 hours ago
Collatz
TheZwierzLF
69
35ms
3 hours ago
Polyominoes
tomh1012
1,723
400ms
3 hours ago
Evil Numbers (Long)
TheZwierzLF
46
32ms
3 hours ago
Evil Numbers
TheZwierzLF
44
32ms
3 hours ago
Odious Numbers
TheZwierzLF
44
32ms
3 hours ago
Odious Numbers (Long)
TheZwierzLF
46
35ms
3 hours ago
Christmas Trees
Mukundan314
70
9ms
3 hours ago
Ascending Primes
TheZwierzLF
91
1,301ms
3 hours ago
Partition Numbers
bizy-coder
🥈
56
35ms
3 hours ago
Arrows
prestosilver
228
2ms
3 hours ago
Prime Numbers
JOrE20
20
37ms
3 hours ago
Card Number Validation
yujqiao
129
16ms
3 hours ago
Prime Numbers
JOrE20
43
247ms
3 hours ago
Pernicious Numbers (Long)
dokutan
72
2,141ms
3 hours ago
Evil Numbers (Long)
dokutan
53
1,992ms
3 hours ago
Evil Numbers
dokutan
51
1,928ms
3 hours ago
Odious Numbers
dokutan
51
1,885ms
3 hours ago
Odious Numbers (Long)
dokutan
52
1,934ms
3 hours ago
CSS Colors
dokutan
2,601
2,041ms
3 hours ago
Star Wars GPT
blaztoma
🥇
116
18ms
3 hours ago
ISBN
BREMAUCY
316
13ms
3 hours ago
λ
JOrE20
441
98ms
3 hours ago
Gray Code Decoder
JOrE20
100
42ms
4 hours ago
Gray Code Decoder
JOrE20
77
11ms
4 hours ago
99 Bottles of Beer
emplv
202
9ms
4 hours ago
Abundant Numbers
arutonee1
67
112ms
4 hours ago
Odd Polyomino Tiling
JOrE20
21,447
2ms
4 hours ago
Odd Polyomino Tiling
JOrE20
2,686
9ms
4 hours ago
Inventory Sequence
BrunoVisnadi
58
33ms
4 hours ago
Emirp Numbers
JOrE20
135
7ms
4 hours ago
Partition Numbers
JOrE20
163
10ms
4 hours ago
99 Bottles of Beer
JOrE20
2,460
6ms
4 hours ago