Recent Solutions
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
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
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
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Tower of Hanoi
Turtle
Tutorial
All Languages
><>
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Common Lisp
Crystal
D
Dart
Elixir
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
Erlang
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
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
Erlang
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
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
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
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Tower of Hanoi
Turtle
Tutorial
Hole
Golfer
Bytes
Time
Submitted
Fibonacci
Zach1031
54
2ms
7 hours ago
λ
JOrE20
1,016
2ms
29 hours ago
12 Days of Christmas
albanian-laundromat
482
2ms
45 hours ago
Prime Numbers
DialFrost
44
2ms
2 days ago
Prime Numbers (Long)
DialFrost
🥇
45
1,137ms
2 days ago
Van Eck Sequence
albanian-laundromat
58
2ms
2 days ago
Trinomial Triangle
DialFrost
🥉
71
2ms
2 days ago
Pascal’s Triangle
DialFrost
55
2ms
2 days ago
Collatz
StronkCheese2
88
6ms
3 days ago
Arithmetic Numbers
StronkCheese2
94
2,050ms
3 days ago
Trinomial Triangle
MeWhenI
92
2ms
3 days ago
Partition Numbers
DialFrost
59
2ms
4 days ago
Zodiac Signs
retrohun
186
3ms
5 days ago
Tutorial
luuumine
63
3ms
5 days ago
Polyominoes
albanian-laundromat
💎
367
73ms
5 days ago
Tic-tac-toe
albanian-laundromat
111
130ms
6 days ago
99 Bottles of Beer
albanian-laundromat
239
2ms
6 days ago
Game of Life
xsot
💎
93
5ms
6 days ago
Zodiac Signs
bitsandbeyond
2,593
3ms
7 days ago
Minesweeper
xsot
💎
99
19ms
7 days ago
Tower of Hanoi
HumanoidCPU
4,098
2ms
8 days ago
Leyland Numbers
DialFrost
85
11ms
8 days ago
Day of Week
edsrzf
54
3ms
10 days ago
γ
gigaprofisi
1,016
1ms
11 days ago
λ
snoozingnewt
🥉
915
3ms
11 days ago
Fizz Buzz
albanian-laundromat
60
2ms
11 days ago
Tower of Hanoi
Shanethegamer
60
2ms
12 days ago
Game of Life
edsrzf
🥈
96
5ms
12 days ago
Minesweeper
edsrzf
🥈
102
14ms
12 days ago
𝑒
JOrE20
1,016
2ms
12 days ago
Card Number Validation
albanian-laundromat
77
2ms
12 days ago
Card Number Validation
snoozingnewt
96
3ms
13 days ago
Divisors
albanian-laundromat
61
2ms
13 days ago
Topological Sort
xsot
💎
63
52ms
13 days ago
Pangram Grep
albanian-laundromat
77
13ms
13 days ago
ASCII Table
snoozingnewt
146
2ms
14 days ago
Tower of Hanoi
bitsandbeyond
55
2ms
14 days ago
Quine
JOrE20
60
2ms
14 days ago
Minesweeper
sean-niemann
🥉
105
100ms
14 days ago
Minesweeper
albanian-laundromat
113
17ms
15 days ago
Prime Numbers
retrohun
52
2ms
15 days ago
Fractions
snoozingnewt
117
2ms
15 days ago
Trinomial Triangle
xsot
🥈
66
2ms
15 days ago
Set
snoozingnewt
🥉
193
23ms
16 days ago
Pangram Grep
Babafaba
140
3ms
16 days ago
Tower of Hanoi
sean-niemann
60
2ms
16 days ago
Mandelbrot
snoozingnewt
178
142ms
16 days ago
Tower of Hanoi
rucin93
68
2ms
16 days ago
Tutorial
Openstreetmapler
439
2ms
16 days ago
Fibonacci
albanian-laundromat
41
2ms
16 days ago
Tower of Hanoi
albanian-laundromat
82
2ms
16 days ago
Kolakoski Sequence
snoozingnewt
112
3ms
17 days ago
Scrambled Sort
albanian-laundromat
🥈
195
6ms
18 days ago
Zeckendorf Representation
albanian-laundromat
70
3ms
18 days ago
Ellipse Perimeters
Shanethegamer
40
1ms
19 days ago
Pernicious Numbers
CaedenHarper
44
1ms
19 days ago
Evil Numbers
snoozingnewt
73
1ms
21 days ago
Evil Numbers (Long)
snoozingnewt
75
2ms
21 days ago
Odious Numbers
snoozingnewt
69
2ms
21 days ago
Odious Numbers (Long)
snoozingnewt
70
2ms
21 days ago
Fibonacci
snoozingnewt
39
2ms
22 days ago
Tongue-twisters
snoozingnewt
🥉
381
2ms
23 days ago
Happy Numbers
iczelia
270
3ms
26 days ago
Pernicious Numbers
snoozingnewt
🥇
40
2ms
26 days ago
Seven Segment
iczelia
192
2ms
27 days ago
Topological Sort
iczelia
235
12ms
27 days ago
DFA Simulator
snoozingnewt
267
5ms
18 Oct 2025
Prime Numbers (Long)
CaedenHarper
62
1,660ms
17 Oct 2025
Prime Numbers
CaedenHarper
61
2ms
17 Oct 2025
Partition Numbers
iczelia
109
6ms
17 Oct 2025
Polyominoes
emgordon154
🥉
1,062
2ms
17 Oct 2025
Polyominoes
snoozingnewt
🥈
1,005
3ms
16 Oct 2025
Hilbert Curve
snoozingnewt
🥈
575
2ms
16 Oct 2025
24 Game
rucin93
💎
272
3,941ms
16 Oct 2025
Tutorial
Babafaba
439
3ms
15 Oct 2025