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
Calendar
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
Multitap Input
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
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
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
ArkScript
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Lily
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
ArkScript
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Lily
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
Calendar
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
Multitap Input
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
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
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
Collatz
Flekay
72
44ms
a min ago
Billiards
Steffan153
🥈
168
106ms
5 mins ago
Trinomial Triangle
Flekay
67
10ms
10 mins ago
Niven Numbers (Long)
Flekay
54
16ms
15 mins ago
π
jkelly467
183
72ms
22 mins ago
Game of Life
Steffan153
173
59ms
27 mins ago
Pernicious Numbers (Long)
Flekay
53
23ms
28 mins ago
12 Days of Christmas
Flekay
464
10ms
35 mins ago
Billiards
edsrzf
💎
179
3ms
43 mins ago
Billiards
edsrzf
💎
167
102ms
45 mins ago
Prime Numbers
Flekay
42
10ms
45 mins ago
Catalan Numbers
Flekay
46
10ms
50 mins ago
Pangram Grep
Flekay
78
11ms
51 mins ago
Number Spiral
Flekay
188
17ms
51 mins ago
Niven Numbers
Flekay
46
10ms
51 mins ago
Minesweeper
Steffan153
122
435ms
52 mins ago
Ten-pin Bowling
Steffan153
🥉
100
1,299ms
59 mins ago
Ordinal Numbers
JOrE20
38
61ms
60 mins ago
Ten-pin Bowling
Steffan153
🥉
143
8ms
61 mins ago
Mahjong
blaztoma
💎
270
106ms
62 mins ago
Vampire Numbers
snoozingnewt
130
1,118ms
83 mins ago
Vampire Numbers
snoozingnewt
130
593ms
83 mins ago
ROT13
snoozingnewt
69
30ms
91 mins ago
Polyominoes
snoozingnewt
292
759ms
92 mins ago
Polyominoes
snoozingnewt
292
19ms
92 mins ago
λ
snoozingnewt
327
756ms
95 mins ago
λ
snoozingnewt
331
47ms
95 mins ago
Kolakoski Constant
snoozingnewt
106
471ms
96 mins ago
Kolakoski Constant
snoozingnewt
106
73ms
96 mins ago
Jacobi Symbol
snoozingnewt
144
554ms
98 mins ago
Jacobi Symbol
snoozingnewt
152
18ms
98 mins ago
γ
snoozingnewt
157
515ms
100 mins ago
γ
snoozingnewt
157
57ms
100 mins ago
Catalan’s Constant
snoozingnewt
175
500ms
104 mins ago
Catalan’s Constant
snoozingnewt
175
24ms
105 mins ago
Gray Code Encoder
kg583
88
23ms
108 mins ago
Ascending Primes
snoozingnewt
84
432ms
111 mins ago
Ascending Primes
snoozingnewt
85
18ms
112 mins ago
Kaprekar Numbers
Steffan153
🥈
56
3,010ms
118 mins ago
Morse Encoder
blaztoma
161
16ms
2 hours ago
Abundant Numbers (Long)
Flekay
66
30ms
2 hours ago
Hilbert Curve
Steffan153
💎
296
110ms
2 hours ago
Star Wars GPT
error256
128
17ms
2 hours ago
Rule 110
JOrE20
15,864
2ms
2 hours ago
Smith Numbers
JOrE20
1,836
2ms
2 hours ago
Gray Code Encoder
Matter1024
62
15ms
2 hours ago
Gray Code Decoder
Matter1024
77
17ms
2 hours ago
Calendar
emgordon154
🥈
249
439ms
2 hours ago
τ
Flekay
168
14ms
2 hours ago
π
Flekay
168
14ms
2 hours ago
Zeckendorf Representation
Flekay
150
10ms
2 hours ago
Gray Code Decoder
albanian-laundromat
26
33ms
2 hours ago
Time Distance
Flekay
331
11ms
2 hours ago
Ten-pin Bowling
Flekay
244
16ms
2 hours ago
Sierpiński Triangle
Flekay
83
10ms
2 hours ago
Set
Flekay
154
27ms
2 hours ago
Roman to Arabic
Flekay
130
20ms
2 hours ago
Rock-paper-scissors-Spock-lizard
Flekay
268
11ms
2 hours ago
Polyominoes
Flekay
292
22ms
2 hours ago
Poker
Flekay
406
18ms
2 hours ago
Musical Chords
Flekay
259
19ms
2 hours ago
Mandelbrot
Flekay
141
185ms
2 hours ago
Kolakoski Sequence
Flekay
67
11ms
2 hours ago
Kolakoski Constant
Flekay
106
61ms
2 hours ago
Jacobi Symbol
Flekay
152
17ms
2 hours ago
Inventory Sequence
Flekay
76
15ms
2 hours ago
Hexdump
Flekay
190
13ms
2 hours ago
Gijswijt’s Sequence
Flekay
112
693ms
2 hours ago
Farey Sequence
Flekay
80
13ms
2 hours ago
Emirp Numbers
Flekay
92
17ms
2 hours ago
DFA Simulator
Flekay
195
11ms
2 hours ago
Christmas Trees
Flekay
86
9ms
2 hours ago
Catalan’s Constant
Flekay
175
21ms
2 hours ago
Card Number Validation
Flekay
108
16ms
2 hours ago
brainfuck
Flekay
215
24ms
2 hours ago
ASCII Table
Flekay
114
10ms
2 hours ago
Odious Numbers
KasperKivimaeki
249
2ms
3 hours ago
Reversi
Yewzir
276
4ms
3 hours ago
Kolakoski Constant
Natanaelel
🥉
98
142ms
3 hours ago
Card Number Validation
JOrE20
93
10ms
3 hours ago