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
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
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
ArkScript
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
ArkScript
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
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
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
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
Chars
Time
Submitted
SI Units
alexsave
803
13ms
a min ago
Sudoku
blaztoma
🥈
545
143ms
4 mins ago
ISBN
frosster
96
3ms
18 mins ago
Fizz Buzz
Natanaelel
131
154ms
21 mins ago
Tutorial
JesseNoEyes
79
3ms
28 mins ago
Look and Say
emgordon154
🥉
218
1,676ms
28 mins ago
Fizz Buzz
Natanaelel
83
117ms
32 mins ago
Fractions
JesseNoEyes
171
2ms
34 mins ago
Sudoku
snoozingnewt
💎
539
138ms
39 mins ago
DFA Simulator
andrewjc2000
179
12ms
39 mins ago
Tutorial
albanian-laundromat
75
121ms
60 mins ago
Collatz
JesseNoEyes
79
20ms
61 mins ago
Gijswijt’s Sequence
emgordon154
🥈
240
1,690ms
62 mins ago
Pernicious Numbers
Natanaelel
26
3ms
64 mins ago
Collatz
JesseNoEyes
83
5ms
66 mins ago
Taxicab Numbers
albanian-laundromat
92
3,995ms
87 mins ago
Tower of Hanoi
jgbaldwinbrown
88
2ms
89 mins ago
Taxicab Numbers
albanian-laundromat
113
3,845ms
91 mins ago
Taxicab Numbers
albanian-laundromat
128
37ms
93 mins ago
Hexdump
arcpolaris
263
438ms
108 mins ago
Calendar
aadenboy
🥈
288
4ms
2 hours ago
Diamonds
Yax42
126
367ms
2 hours ago
Tutorial
Mefred
160
89ms
2 hours ago
Tutorial
Mefred
330
3ms
2 hours ago
Tutorial
Mefred
207
48ms
2 hours ago
Tutorial
Mefred
231
154ms
2 hours ago
Tutorial
Mefred
135
44ms
2 hours ago
Tutorial
Mefred
179
17ms
2 hours ago
Tutorial
Mefred
286
4ms
2 hours ago
Tutorial
Mefred
129
6ms
2 hours ago
Tutorial
Mefred
96
134ms
2 hours ago
Tutorial
Mefred
153
4ms
2 hours ago
Tutorial
Mefred
168
6ms
2 hours ago
Tutorial
Mefred
162
258ms
2 hours ago
Tutorial
Mefred
158
88ms
2 hours ago
Tutorial
Mefred
149
354ms
2 hours ago
Tutorial
Mefred
222
29ms
2 hours ago
Tutorial
Mefred
144
2ms
2 hours ago
Tutorial
Mefred
73
6ms
2 hours ago
Tutorial
Mefred
175
1,021ms
2 hours ago
Tutorial
Mefred
207
31ms
2 hours ago
Tutorial
Mefred
227
657ms
2 hours ago
Tutorial
Mefred
138
4,232ms
2 hours ago
Tutorial
Mefred
121
41ms
2 hours ago
Tutorial
Mefred
135
257ms
2 hours ago
Tutorial
Mefred
91
4ms
2 hours ago
Tutorial
Mefred
157
11ms
2 hours ago
Tutorial
Mefred
146
5ms
2 hours ago
Tutorial
Mefred
135
1,215ms
2 hours ago
Tutorial
Mefred
252
205ms
2 hours ago
Tutorial
Mefred
650
5ms
2 hours ago
Tutorial
Mefred
187
120ms
2 hours ago
Tutorial
Mefred
97
43ms
2 hours ago
Tutorial
Mefred
217
4ms
2 hours ago
Tutorial
Mefred
285
43ms
2 hours ago
Tutorial
Mefred
123
5ms
2 hours ago
Tutorial
Mefred
275
316ms
2 hours ago
Tutorial
Mefred
307
1,760ms
2 hours ago
Tutorial
Mefred
124
95ms
2 hours ago
Diamonds
Yax42
105
3ms
2 hours ago
Tutorial
Mefred
372
402ms
2 hours ago
Tutorial
Mefred
217
1,409ms
2 hours ago
Tutorial
Mefred
137
103ms
2 hours ago
Tutorial
Mefred
234
150ms
2 hours ago
Tutorial
Mefred
176
6ms
2 hours ago
Tutorial
Mefred
211
140ms
2 hours ago
Tutorial
Mefred
151
8ms
2 hours ago
Tutorial
Mefred
176
39ms
2 hours ago
Tutorial
Mefred
479
2,028ms
2 hours ago
Tutorial
Mefred
135
1,439ms
2 hours ago
Tutorial
Mefred
158
556ms
2 hours ago
Tutorial
Mefred
386
17ms
2 hours ago
Tutorial
Mefred
158
134ms
2 hours ago
Tutorial
Mefred
395
2,064ms
2 hours ago
Tutorial
Mefred
431
2ms
2 hours ago
Tutorial
Mefred
276
3ms
2 hours ago
Tutorial
Mefred
439
2ms
2 hours ago
Tutorial
Mefred
133
3ms
2 hours ago
Tutorial
Mefred
282
68ms
2 hours ago
Tutorial
Mefred
161
81ms
2 hours ago