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
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
Calendar
Connect Four
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
Minesweeper
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
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
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
Calendar
Connect Four
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
Minesweeper
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Turtle
Tutorial
Hole
Golfer
Bytes
Submitted
24 Game
snoozingnewt
🥈
482
32 mins ago
Trinomial Triangle
snoozingnewt
🥈
153
33 mins ago
12 Days of Christmas
snoozingnewt
543
58 mins ago
Trinomial Triangle
aviyanp
🥉
180
58 mins ago
24 Game
aviyanp
🥉
518
68 mins ago
12 Days of Christmas
aviyanp
547
72 mins ago
Farey Sequence
snoozingnewt
158
2 hours ago
Odious Numbers
Babafaba
68
6 hours ago
Smith Numbers
snoozingnewt
212
27 hours ago
Van Eck Sequence
snoozingnewt
162
29 hours ago
Tutorial
intgrah
207
34 hours ago
Inventory Sequence
snoozingnewt
219
35 hours ago
Levenshtein Distance
m-tkach
💎
95
36 hours ago
Levenshtein Distance
edsrzf
🥈
108
3 days ago
Trinomial Triangle
dokutan
2,080
4 days ago
Arithmetic Numbers
snoozingnewt
150
5 days ago
Pernicious Numbers
snoozingnewt
128
5 days ago
Pernicious Numbers (Long)
snoozingnewt
134
5 days ago
Poker
edsrzf
💎
471
8 days ago
Pernicious Numbers
Yax42
71
10 days ago
Polyominoes
snoozingnewt
🥉
3,577
11 days ago
Factorial Factorisation
snoozingnewt
🥉
875
11 days ago
Kaprekar Numbers
snoozingnewt
🥈
453
11 days ago
Intersection
snoozingnewt
306
12 days ago
Pascal’s Triangle
snoozingnewt
158
13 days ago
Trinomial Triangle
edsrzf
💎
119
14 days ago
Trinomial Triangle
CaedenHarper
2,080
14 days ago
Niven Numbers (Long)
snoozingnewt
116
15 days ago
Niven Numbers
snoozingnewt
74
15 days ago
Prime Numbers (Long)
snoozingnewt
131
16 days ago
Prime Numbers
snoozingnewt
129
16 days ago
Collatz
intgrah
119
17 days ago
Niven Numbers
albanian-laundromat
70
20 days ago
Recamán
snoozingnewt
342
20 days ago
Partition Numbers
snoozingnewt
🥉
151
21 days ago
12 Days of Christmas
dokutan
2,382
21 days ago
Tutorial
wobblybits
127
22 days ago
Game of Life
edsrzf
💎
161
23 days ago
Tutorial
snoozingnewt
80
15 Sep 2025
Happy Numbers (Long)
snoozingnewt
182
13 Sep 2025
Happy Numbers
snoozingnewt
181
13 Sep 2025
Hilbert Curve
snoozingnewt
🥇
5,131
13 Sep 2025
Pangram Grep
snoozingnewt
218
12 Sep 2025
Catalan’s Constant
dokutan
1,016
7 Sep 2025
Ascending Primes
dokutan
525
7 Sep 2025
99 Bottles of Beer
dokutan
546
7 Sep 2025
𝑒
dokutan
1,016
7 Sep 2025
√2
dokutan
1,016
7 Sep 2025
φ
dokutan
1,016
7 Sep 2025
τ
dokutan
1,016
7 Sep 2025
π
dokutan
1,016
7 Sep 2025
λ
dokutan
1,016
7 Sep 2025
γ
dokutan
1,016
7 Sep 2025
ln 2
dokutan
1,016
7 Sep 2025
Happy Numbers
dokutan
120
7 Sep 2025
Hilbert Curve
dokutan
🥇
5,131
7 Sep 2025
Kaprekar Numbers
dokutan
🥈
453
7 Sep 2025
Tutorial
targrik
107
4 Sep 2025
Inventory Sequence
blaztoma
151
3 Sep 2025
Fibonacci
jinwoo
76
2 Sep 2025
Hilbert Curve
CaedenHarper
🥇
5,131
28 Aug 2025
Fibonacci
albanian-laundromat
102
26 Aug 2025
ROT13
edsrzf
🥈
124
26 Aug 2025
Tutorial
Vexxter9
207
21 Aug 2025
Mandelbrot
CaedenHarper
10,017
16 Aug 2025
Partition Numbers
CaedenHarper
660
16 Aug 2025
Sierpiński Triangle
CaedenHarper
567
16 Aug 2025
Van Eck Sequence
CaedenHarper
2,568
16 Aug 2025
Vampire Numbers
CaedenHarper
1,084
16 Aug 2025
Smith Numbers
CaedenHarper
1,837
16 Aug 2025
Rule 110
CaedenHarper
15,865
16 Aug 2025
Recamán
CaedenHarper
910
16 Aug 2025
Polyominoes
CaedenHarper
🥉
3,577
16 Aug 2025
Pernicious Numbers (Long)
CaedenHarper
20,675
16 Aug 2025
Pernicious Numbers
CaedenHarper
113
16 Aug 2025