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
Partition Numbers
edsrzf
🥉
80
2,315ms
7 hours ago
Tower of Hanoi
jameswmccarty
96
2,169ms
9 hours ago
Morse Decoder
edsrzf
🥈
124
2,612ms
46 hours ago
Quine
ky28059
70
2,091ms
2 days ago
Multitap Input
jkelly467
🥉
127
2,254ms
3 days ago
United States
JayXon
💎
117
3,162ms
4 days ago
Tutorial
FortuiteMan
138
4,206ms
5 days ago
Prime Numbers (Long)
jkelly467
51
2,165ms
6 days ago
Fibonacci
msbranicky
54
2,145ms
6 days ago
π
JOrE20
1,011
2,081ms
7 days ago
τ
JOrE20
1,011
1,968ms
7 days ago
Multitap Input
dokutan
402
2,242ms
7 days ago
Multitap Input
stefangimmillaro
147
2,257ms
7 days ago
Sudoku
RobertHoeh
1,347
3,358ms
9 days ago
Multitap Input
edsrzf
🥈
102
2,270ms
10 days ago
Look and Say
pardouin
🥈
93
2,314ms
11 days ago
Multitap Input
pardouin
💎
100
2,368ms
11 days ago
Rule 110
jkelly467
139
2,217ms
11 days ago
Kolakoski Constant
JOrE20
1,011
2,085ms
11 days ago
Christmas Trees
jkelly467
86
2,278ms
12 days ago
Look and Say
jkelly467
101
2,162ms
13 days ago
π
Andrey2001
1,004
2,073ms
14 days ago
Card Number Validation
jkelly467
99
2,384ms
17 days ago
Fibonacci
jkelly467
52
2,337ms
20 days ago
Repeating Decimals
Matter1024
245
2,342ms
21 days ago
Tongue-twisters
pardouin
297
2,329ms
22 days ago
Diamonds
dokutan
136
2,242ms
24 days ago
Tutorial
Mefred
138
4,281ms
24 days ago
Maze
dokutan
340
4,770ms
25 days ago
Kaprekar Numbers
KatieLG
93
3,146ms
25 days ago
Arithmetic Numbers
sean-niemann
🥈
68
2,373ms
26 days ago
24 Game
sean-niemann
🥈
288
2,701ms
26 days ago
Arabic to Roman
jkelly467
190
2,631ms
27 days ago
Tongue-twisters
sean-niemann
🥉
289
2,344ms
27 days ago
Tower of Hanoi
anter69
3,582
1,934ms
8 Jan 2026
Pernicious Numbers
fuzzylojik-golf
43
2,092ms
7 Jan 2026
Day of Week
jkelly467
61
2,206ms
7 Jan 2026
φ
jkelly467
71
2,230ms
7 Jan 2026
Reversi
sean-niemann
137
2,486ms
7 Jan 2026
Proximity Grid
sean-niemann
139
2,385ms
7 Jan 2026
Ordinal Numbers
sean-niemann
🥈
94
2,255ms
7 Jan 2026
Fractions
sean-niemann
98
2,325ms
7 Jan 2026
Arrows
sean-niemann
🥉
106
4,514ms
7 Jan 2026
Day of Week
sean-niemann
🥇
60
2,164ms
7 Jan 2026
Pangram Grep
sean-niemann
🥇
62
2,622ms
7 Jan 2026
Fibonacci
fuzzylojik-golf
49
2,053ms
7 Jan 2026
Quine
CornerMercury
🥉
67
2,124ms
7 Jan 2026
Catalan’s Constant
JOrE20
1,011
2,094ms
6 Jan 2026
Gray Code Decoder
albanian-laundromat
55
2,247ms
6 Jan 2026
Calendar
edsrzf
💎
191
2,399ms
6 Jan 2026
φ
JOrE20
1,011
2,063ms
4 Jan 2026
√2
JOrE20
1,011
2,011ms
4 Jan 2026
ln 2
JOrE20
1,011
2,158ms
4 Jan 2026
Calendar
jkelly467
🥉
254
2,381ms
1 Jan 2026
Day of Week
fuzzylojik-golf
68
2,231ms
31 Dec 2025
99 Bottles of Beer
sean-niemann
🥉
274
2,155ms
30 Dec 2025
Seven Segment
jkelly467
165
2,241ms
30 Dec 2025
Prime Numbers (Long)
Florian-Mt
🥇
50
2,159ms
28 Dec 2025
Prime Numbers
Florian-Mt
🥇
48
2,176ms
28 Dec 2025
Tower of Hanoi
KatieLG
325
2,015ms
28 Dec 2025
12 Days of Christmas
jkelly467
494
2,308ms
28 Dec 2025
Prime Numbers
edsrzf
🥇
48
2,187ms
27 Dec 2025
Prime Numbers (Long)
edsrzf
🥇
50
2,237ms
27 Dec 2025
Evil Numbers
JOrE20
49
2,024ms
26 Dec 2025
Tower of Hanoi
Natanaelel
70
2,227ms
25 Dec 2025
Hexagonal Spiral
bitsandbeyond
233
2,291ms
24 Dec 2025
Niven Numbers (Long)
fuzzylojik-golf
🥇
54
2,271ms
24 Dec 2025
Niven Numbers
fuzzylojik-golf
🥇
44
2,189ms
24 Dec 2025
Prime Numbers (Long)
fuzzylojik-golf
🥇
50
2,255ms
24 Dec 2025
Prime Numbers
fuzzylojik-golf
🥇
48
2,232ms
24 Dec 2025
Kolakoski Constant
jkelly467
156
2,607ms
23 Dec 2025
Pascal’s Triangle
edsrzf
🥇
66
2,257ms
23 Dec 2025
Trinomial Triangle
edsrzf
💎
90
2,193ms
23 Dec 2025
Kolakoski Sequence
jkelly467
70
2,249ms
22 Dec 2025
Calendar
pardouin
🥈
241
2,216ms
22 Dec 2025
ASCII Table
AnAwesomGuy
155
2,269ms
21 Dec 2025
Tower of Hanoi
emgordon154
78
2,191ms
21 Dec 2025
Tower of Hanoi
JayXon
🥇
66
2,141ms
20 Dec 2025
Tower of Hanoi
sean-niemann
🥇
66
2,253ms
20 Dec 2025
Reverse Polish Notation
RobertHoeh
225
2,501ms
18 Dec 2025