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
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
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
Gray Code Decoder
albanian-laundromat
109
10ms
17 hours ago
π
Carlos-EAC
1,010
3ms
4 days ago
Tower of Hanoi
CaedenHarper
4,092
4ms
5 days ago
Evil Numbers
JOrE20
99
3ms
5 days ago
γ
JOrE20
1,007
3ms
5 days ago
Kolakoski Constant
JOrE20
1,007
3ms
5 days ago
π
JOrE20
1,007
3ms
5 days ago
τ
JOrE20
1,007
3ms
5 days ago
Sphenic Numbers
HumanoidCPU
19,658
5ms
5 days ago
Tower of Hanoi
edsrzf
💎
78
4ms
6 days ago
Tower of Hanoi
AlephSquirrel
🥈
79
3ms
6 days ago
Tower of Hanoi
JOrE20
3,189
3ms
6 days ago
Sierpiński Triangle
JOrE20
412
3ms
6 days ago
Tower of Hanoi
KatieLG
6,646
4ms
6 days ago
Tutorial
TheZwierzLF
114
4ms
7 days ago
24 Game
JOrE20
🥉
13,216
4ms
7 days ago
Tower of Hanoi
HumanoidCPU
6,641
4ms
8 days ago
Tower of Hanoi
dokutan
4,092
3ms
8 days ago
Taxicab Numbers
HumanoidCPU
7,068
4ms
9 days ago
Fizz Buzz
WorseGolfer
128,226
4ms
9 days ago
Mandelbrot
JOrE20
2,256
4ms
9 days ago
Cubes
JOrE20
🥉
2,265
4ms
9 days ago
Lucky Numbers
JOrE20
5,824
4ms
9 days ago
Tongue-twisters
JOrE20
541
4ms
9 days ago
Ascending Primes
JOrE20
🥈
616
4ms
9 days ago
Minesweeper
AidanWalter
1,922
7ms
10 days ago
99 Bottles of Beer
JOrE20
12,188
4ms
10 days ago
Emirp Numbers
JOrE20
176
3ms
10 days ago
Fizz Buzz
JOrE20
🥈
97
3ms
10 days ago
Hilbert Curve
JOrE20
🥇
2,084
4ms
10 days ago
Number Spiral
JOrE20
314
3ms
10 days ago
Taxicab Numbers
Shanethegamer
4,649
4ms
11 days ago
Polyominoes
albanian-laundromat
💎
2,398
4ms
12 days ago
Tongue-twisters
prestosilver
541
3ms
12 days ago
Tower of Hanoi
Shanethegamer
🥈
79
3ms
13 days ago
Tower of Hanoi
MeWhenI
🥈
79
6ms
13 days ago
Smooth Numbers
albanian-laundromat
141
179ms
13 days ago
Tower of Hanoi
albanian-laundromat
94
3ms
13 days ago
Abundant Numbers
albanian-laundromat
73
3ms
13 days ago
99 Bottles of Beer
albanian-laundromat
298
3ms
13 days ago
Prime Numbers
albanian-laundromat
68
3ms
13 days ago
Prime Numbers (Long)
albanian-laundromat
74
200ms
13 days ago
Abundant Numbers (Long)
albanian-laundromat
🥈
73
7ms
13 days ago
Hilbert Curve
Babafaba
🥇
2,084
4ms
15 days ago
Divisors
albanian-laundromat
64
3ms
17 days ago
Tutorial
JOrE20
70
4ms
18 days ago
Hilbert Curve
BREMAUCY
🥇
2,084
4ms
18 days ago
Polyominoes
KatieLG
🥈
2,402
3ms
19 days ago
Niven Numbers
albanian-laundromat
🥈
58
4ms
20 days ago
Niven Numbers (Long)
albanian-laundromat
88
4ms
20 days ago
Fibonacci
albanian-laundromat
45
3ms
20 days ago
π
gigaprofisi
1,012
3ms
22 days ago
τ
gigaprofisi
1,012
3ms
22 days ago
Hilbert Curve
ndren
2,094
3ms
22 days ago
λ
JOrE20
1,007
3ms
22 days ago
Minesweeper
blaztoma
695
6ms
27 days ago
Trinomial Triangle
MeWhenI
🥉
2,091
3ms
8 Nov 2025
Minesweeper
MeWhenI
🥈
225
6ms
8 Nov 2025
Quine
JOrE20
🥇
14
3ms
7 Nov 2025
ASCII Table
edsrzf
132
3ms
6 Nov 2025
γ
gigaprofisi
1,009
3ms
4 Nov 2025
𝑒
JOrE20
1,007
3ms
3 Nov 2025
Minesweeper
edsrzf
💎
163
83ms
1 Nov 2025
Quine
snoozingnewt
🥇
14
3ms
31 Oct 2025
Pangram Grep
Babafaba
199
3ms
30 Oct 2025
Tutorial
Openstreetmapler
217
4ms
30 Oct 2025
Game of Life
edsrzf
💎
152
65ms
28 Oct 2025
Minesweeper
CaedenHarper
🥉
440
6ms
26 Oct 2025
Fibonacci
snoozingnewt
52
3ms
24 Oct 2025
Pernicious Numbers
snoozingnewt
52
3ms
20 Oct 2025
Niven Numbers
snoozingnewt
78
5ms
20 Oct 2025
Rijndael S-box
edsrzf
💎
346
5ms
18 Oct 2025
Fibonacci
lynn
36
4ms
18 Oct 2025
Happy Numbers
edsrzf
70
3ms
16 Oct 2025
Fizz Buzz
edsrzf
98
3ms
16 Oct 2025