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
Continued Fractions
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
Gray Code Decoder
Gray Code Encoder
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)
Taxicab Numbers
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
Alphabetic Numbers
Apéry’s Constant
Binary Lambda Calculus
Connect Four
Crossword
CSS Colors (Inverse)
CSS Grid
Dragon Curve
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Hexagonal Spiral
Highly Composite Numbers
Huffman Encoder
NFA Simulator
Nim
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Turtle
Tutorial
All Languages
><>
ALGOL 68
ArkScript
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
APL
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
><>
ALGOL 68
ArkScript
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
APL
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
Continued Fractions
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
Gray Code Decoder
Gray Code Encoder
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)
Taxicab Numbers
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
Alphabetic Numbers
Apéry’s Constant
Binary Lambda Calculus
Connect Four
Crossword
CSS Colors (Inverse)
CSS Grid
Dragon Curve
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Hexagonal Spiral
Highly Composite Numbers
Huffman Encoder
NFA Simulator
Nim
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Turtle
Tutorial
Hole
Golfer
Bytes
Time
Submitted
Forsyth–Edwards Notation
Matter1024
208
2ms
2 days ago
Tic-tac-toe
Matter1024
294
24ms
4 days ago
Catalan Numbers
Matter1024
59
2ms
5 days ago
Cubes
Matter1024
306
2ms
6 days ago
ASCII Table
Matter1024
138
2ms
6 days ago
99 Bottles of Beer
Matter1024
292
2ms
6 days ago
12 Days of Christmas
Matter1024
486
2ms
6 days ago
Odious Numbers (Long)
Matter1024
58
3ms
6 days ago
Odious Numbers
Matter1024
57
2ms
6 days ago
Evil Numbers (Long)
Matter1024
60
2ms
6 days ago
Evil Numbers
Matter1024
59
2ms
6 days ago
Rijndael S-box
Matter1024
586
2ms
7 days ago
Dragon Curve
HumanoidCPU
11,529
2ms
7 days ago
Rule 110
Matter1024
138
6ms
8 days ago
Prime Numbers (Long)
Matter1024
74
4,697ms
8 days ago
Arithmetic Numbers
Matter1024
96
4,213ms
8 days ago
Emirp Numbers (Long)
Matter1024
908
639ms
8 days ago
Pernicious Numbers
Matter1024
72
2ms
8 days ago
Prime Numbers
Matter1024
62
2ms
8 days ago
Pernicious Numbers (Long)
Matter1024
92
12ms
8 days ago
Diamonds
Matter1024
172
2ms
8 days ago
Niven Numbers
Matter1024
47
2ms
9 days ago
τ
Matter1024
103
98ms
9 days ago
π
Matter1024
103
99ms
9 days ago
Apéry’s Constant
Matter1024
113
153ms
9 days ago
Fizz Buzz
teebee
67
2ms
10 days ago
√2
Matter1024
55
161ms
10 days ago
𝑒
Matter1024
71
41ms
10 days ago
Transpose Sentence
Matter1024
138
31ms
12 days ago
Sierpiński Triangle
Matter1024
117
2ms
12 days ago
Ordinal Numbers
Matter1024
140
5ms
14 days ago
Seven Segment
Matter1024
206
2ms
14 days ago
Card Number Validation
Matter1024
129
3ms
15 days ago
Smooth Numbers
Matter1024
88
357ms
15 days ago
Time Distance
Matter1024
309
4ms
15 days ago
United States
Matter1024
532
3ms
15 days ago
CSS Colors
Matter1024
1,093
7ms
19 days ago
Intersection
Matter1024
142
4ms
19 days ago
Quine
Matter1024
18
2ms
19 days ago
Jacobi Symbol
Matter1024
183
5ms
20 days ago
Gray Code Decoder
Matter1024
101
60ms
20 days ago
Gray Code Encoder
Matter1024
99
11ms
20 days ago
Tower of Hanoi
Matter1024
100
4ms
20 days ago
Tower of Hanoi
scpchicken
87
3ms
20 days ago
Collatz
Matter1024
82
57ms
20 days ago
Kolakoski Constant
Matter1024
160
142ms
20 days ago
φ
Matter1024
73
22ms
20 days ago
Look and Say
Matter1024
144
3ms
20 days ago
Kolakoski Sequence
Matter1024
102
7ms
20 days ago
Fibonacci
Matter1024
34
2ms
20 days ago
Ellipse Perimeters
Matter1024
114
2ms
20 days ago
Highly Composite Numbers
Matter1024
422
2ms
20 days ago
ROT13
Matter1024
160
13ms
20 days ago
Smith Numbers
Matter1024
175
3,794ms
24 days ago
ln 2
Matter1024
90
39ms
24 days ago
Recamán
Matter1024
89
2ms
29 Mar 2026
Trinomial Triangle
Matter1024
108
3ms
29 Mar 2026
Pascal’s Triangle
Matter1024
88
2ms
29 Mar 2026
Pangram Grep
Matter1024
85
2ms
29 Mar 2026
Zeckendorf Representation
Matter1024
139
5ms
29 Mar 2026
Foo Fizz Buzz Bar
Matter1024
114
4ms
29 Mar 2026
Fizz Buzz
Matter1024
74
2ms
29 Mar 2026
PalindromemordnilaP
Matter1024
125
3ms
29 Mar 2026
Niven Numbers (Long)
Matter1024
78
18ms
29 Mar 2026
Leyland Numbers
Matter1024
189
56ms
29 Mar 2026
Leap Years
Matter1024
58
2ms
29 Mar 2026
Ascending Primes
Matter1024
541
2ms
28 Mar 2026
Kaprekar Numbers
Matter1024
468
2ms
28 Mar 2026
ISBN
Matter1024
112
2ms
28 Mar 2026
Happy Numbers
Matter1024
101
4ms
27 Mar 2026
Happy Numbers (Long)
Matter1024
101
12ms
27 Mar 2026
Gijswijt’s Sequence
Matter1024
159
370ms
27 Mar 2026
Farey Sequence
Matter1024
96
3ms
26 Mar 2026
Divisors
Matter1024
64
2ms
26 Mar 2026
Factorial Factorisation
Matter1024
174
77ms
26 Mar 2026
Emojify
Matter1024
277
2ms
26 Mar 2026
Emirp Numbers
Matter1024
88
105ms
26 Mar 2026
Day of Week
Matter1024
56
3ms
25 Mar 2026
Christmas Trees
Matter1024
95
2ms
25 Mar 2026
CSS Colors (Inverse)
Matter1024
2,563
2ms
25 Mar 2026
Arrows
Matter1024
212
3ms
24 Mar 2026
Tutorial
Matter1024
68
2ms
24 Mar 2026
Arabic to Roman
Matter1024
179
28ms
23 Mar 2026
Abundant Numbers (Long)
Matter1024
70
121ms
23 Mar 2026
Abundant Numbers
Matter1024
70
7ms
23 Mar 2026
Fractions
Matter1024
98
3ms
21 Mar 2026
Alphabetic Numbers
HumanoidCPU
7,898
2ms
6 Mar 2026
Niven Numbers
dokutan
46
2ms
26 Feb 2026
Quine
LostSyntax21
18
2ms
25 Feb 2026
Foo Fizz Buzz Bar
dokutan
122
5ms
15 Feb 2026
Fizz Buzz
dokutan
78
2ms
15 Feb 2026
τ
dokutan
1,006
1ms
8 Feb 2026
π
dokutan
1,006
1ms
8 Feb 2026
ln 2
dokutan
1,006
1ms
8 Feb 2026
Kolakoski Constant
dokutan
1,006
1ms
8 Feb 2026
Collatz
dokutan
83
28ms
8 Feb 2026
Tutorial
FortuiteMan
132
2ms
3 Feb 2026
π
Andrey2001
1,006
2ms
25 Jan 2026
Diamonds
dokutan
154
2ms
16 Jan 2026
Tutorial
Mefred
132
2ms
15 Jan 2026