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
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
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
><>
ALGOL 68
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
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
><>
ALGOL 68
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
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
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
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
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
Chars
Time
Submitted
Continued Fractions
edsrzf
💎
129
5ms
5 hours ago
PalindromemordnilaP
edsrzf
💎
90
5ms
15 hours ago
Continued Fractions
kg583
🥈
138
5ms
26 hours ago
Emirp Numbers (Long)
kg583
💎
99
518ms
2 days ago
Niven Numbers
dokutan
50
4ms
2 days ago
Number Spiral
edsrzf
123
5ms
2 days ago
Kaprekar Numbers
kg583
🥈
102
3,759ms
3 days ago
Rock-paper-scissors-Spock-lizard
JOrE20
2,984
4ms
3 days ago
Fizz Buzz
JOrE20
106
4ms
4 days ago
Collatz
kg583
🥇
76
12ms
7 days ago
Pernicious Numbers (Long)
Steffan153
77
41ms
8 days ago
Roman to Arabic
Steffan153
💎
93
9ms
8 days ago
Happy Numbers (Long)
Steffan153
🥉
80
12ms
8 days ago
Fibonacci
Steffan153
🥇
43
4ms
8 days ago
Lucky Tickets
edsrzf
💎
128
18ms
9 days ago
Lucky Tickets
primo-ppcg
🥈
130
103ms
9 days ago
Look and Say
primo-ppcg
🥈
78
5ms
9 days ago
brainfuck
primo-ppcg
🥈
159
14ms
9 days ago
Card Number Validation
edsrzf
💎
84
4ms
9 days ago
Card Number Validation
kg583
🥈
86
4ms
9 days ago
Arrows
edsrzf
135
5ms
9 days ago
ln 2
JOrE20
1,011
4ms
10 days ago
Mahjong
edsrzf
💎
305
79ms
10 days ago
Pangram Grep
kg583
🥉
78
5ms
11 days ago
Fibonacci
Jacob385
423
4ms
11 days ago
Recamán
primo-ppcg
🥈
69
4ms
12 days ago
Seven Segment
edsrzf
🥉
125
4ms
12 days ago
Prime Numbers
DialFrost
36
3ms
13 days ago
Multitap Input
kg583
💎
103
6ms
14 days ago
ROT13
kg583
🥈
88
7ms
14 days ago
Ten-pin Bowling
edsrzf
💎
153
5ms
14 days ago
Zodiac Signs
kg583
💎
125
8ms
14 days ago
Zeckendorf Representation
kg583
💎
105
5ms
14 days ago
Tic-tac-toe
kg583
🥇
98
12ms
14 days ago
Farey Sequence
dokutan
128
4ms
14 days ago
Sierpiński Triangle
edsrzf
93
4ms
15 days ago
Ten-pin Bowling
kg583
🥈
156
5ms
16 days ago
ASCII Table
kg583
113
4ms
16 days ago
Intersection
kg583
🥈
102
6ms
17 days ago
ISBN
kg583
🥉
95
4ms
18 days ago
Rock-paper-scissors-Spock-lizard
tomh1012
387
4ms
25 days ago
Prime Numbers
tomh1012
78
4ms
26 days ago
Tutorial
FortuiteMan
146
4ms
26 days ago
γ
kg583
🥉
540
4ms
26 days ago
λ
kg583
540
4ms
26 days ago
Forsyth–Edwards Notation
kg583
162
4ms
27 days ago
Reversi
kg583
🥇
119
7ms
27 days ago
π
JOrE20
1,011
4ms
27 days ago
τ
JOrE20
1,011
3ms
27 days ago
Multitap Input
dokutan
🥉
340
4ms
27 days ago
Multitap Input
edsrzf
🥈
104
6ms
1 Feb 2026
Medal Tally
kg583
145
5ms
31 Jan 2026
Quine
JOrE20
37
4ms
29 Jan 2026
Partition Numbers
kg583
🥉
94
5ms
29 Jan 2026
Kolakoski Constant
JOrE20
1,011
4ms
28 Jan 2026
Factorial Factorisation
edsrzf
🥇
110
11ms
26 Jan 2026
Levenshtein Distance
edsrzf
💎
112
664ms
26 Jan 2026
Maze
edsrzf
💎
105
13ms
26 Jan 2026
Hilbert Curve
kg583
💎
316
45ms
26 Jan 2026
Maze
kg583
🥈
106
12ms
26 Jan 2026
N Queens
kg583
🥈
105
17ms
26 Jan 2026
Happy Numbers (Long)
kg583
🥉
80
11ms
26 Jan 2026
Factorial Factorisation
kg583
🥇
110
11ms
25 Jan 2026
Day of Week
kg583
🥇
115
7ms
25 Jan 2026
99 Bottles of Beer
dokutan
286
4ms
25 Jan 2026
Time Distance
kg583
💎
153
8ms
25 Jan 2026
Semiprime Numbers
kg583
82
4,622ms
25 Jan 2026
Levenshtein Distance
kg583
🥈
113
1,676ms
25 Jan 2026
π
Andrey2001
1,011
4ms
25 Jan 2026
Fractions
kg583
🥉
98
4ms
25 Jan 2026
𝑒
kg583
🥈
106
158ms
25 Jan 2026
Vampire Numbers
kg583
🥈
122
1,802ms
25 Jan 2026
United States
kg583
💎
138
5ms
25 Jan 2026
Taxicab Numbers
kg583
104
186ms
25 Jan 2026
Smith Numbers
kg583
🥈
109
1,436ms
25 Jan 2026
Set
kg583
🥈
112
49ms
25 Jan 2026
Scrambled Sort
kg583
🥈
106
18ms
25 Jan 2026
Roman to Arabic
kg583
103
15ms
25 Jan 2026
Rijndael S-box
kg583
🥈
138
19ms
25 Jan 2026
Repeating Decimals
kg583
💎
146
6ms
25 Jan 2026