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
Van Eck Sequence
KatieLG
1,658
61ms
2 hours ago
Vampire Numbers
KatieLG
1,031
61ms
2 hours ago
Trinomial Triangle
KatieLG
1,832
60ms
2 hours ago
Tongue-twisters
KatieLG
496
60ms
2 hours ago
Smith Numbers
KatieLG
1,631
60ms
2 hours ago
Sierpiński Triangle
KatieLG
224
62ms
2 hours ago
Rule 110
KatieLG
2,014
65ms
2 hours ago
Recamán
KatieLG
798
60ms
2 hours ago
Prime Numbers (Long)
KatieLG
4,206
64ms
2 hours ago
Pernicious Numbers (Long)
KatieLG
15,982
119ms
2 hours ago
Pascal’s Triangle
KatieLG
710
59ms
2 hours ago
Odious Numbers (Long)
KatieLG
1,645
59ms
2 hours ago
Niven Numbers (Long)
KatieLG
5,612
70ms
2 hours ago
N Queens
KatieLG
1,165
61ms
2 hours ago
Mandelbrot
KatieLG
638
61ms
2 hours ago
Lucky Numbers
KatieLG
3,634
65ms
2 hours ago
Look and Say
KatieLG
695
61ms
2 hours ago
Leap Years
KatieLG
606
60ms
2 hours ago
Kolakoski Sequence
KatieLG
349
60ms
2 hours ago
Inventory Sequence
KatieLG
1,691
62ms
2 hours ago
Hilbert Curve
KatieLG
🥉
1,017
63ms
2 hours ago
Gijswijt’s Sequence
KatieLG
228
64ms
2 hours ago
Foo Fizz Buzz Bar
KatieLG
1,492
63ms
2 hours ago
Fizz Buzz
KatieLG
273
61ms
2 hours ago
Farey Sequence
KatieLG
2,818
64ms
2 hours ago
Factorial Factorisation
KatieLG
814
64ms
2 hours ago
Evil Numbers (Long)
KatieLG
1,649
61ms
2 hours ago
Emirp Numbers (Long)
KatieLG
1,006
62ms
2 hours ago
Divisors
KatieLG
844
64ms
2 hours ago
Diamonds
KatieLG
382
60ms
2 hours ago
Cubes
KatieLG
893
60ms
2 hours ago
Collatz
KatieLG
2,148
63ms
2 hours ago
Christmas Trees
KatieLG
305
62ms
2 hours ago
Catalan Numbers
KatieLG
2,590
63ms
2 hours ago
Ascending Primes
KatieLG
458
59ms
2 hours ago
Arithmetic Numbers
KatieLG
28,306
215ms
2 hours ago
Abundant Numbers (Long)
KatieLG
834
62ms
2 hours ago
99 Bottles of Beer
KatieLG
1,272
63ms
2 hours ago
24 Game
KatieLG
5,295
72ms
2 hours ago
12 Days of Christmas
KatieLG
1,287
63ms
2 hours ago
Polyominoes
KatieLG
🥉
1,305
62ms
2 hours ago
Levenshtein Distance
JayXon
🥇
59
240ms
3 days ago
Day of Week
JayXon
🥇
53
71ms
3 days ago
λ
JOrE20
1,010
65ms
4 days ago
ln 2
gigaprofisi
1,010
67ms
4 days ago
Collatz
kmathis22
101
63ms
5 days ago
Minesweeper
Kacarott
🥈
127
68ms
8 days ago
Hilbert Curve
Kacarott
1,339
67ms
8 days ago
CSS Colors
GolfingSuccess
65
62ms
11 days ago
Tower of Hanoi
HumanoidCPU
3,584
68ms
11 days ago
Reverse Polish Notation
JayXon
🥇
40
98ms
14 days ago
Tower of Hanoi
Shanethegamer
92
66ms
14 days ago
𝑒
JOrE20
1,010
60ms
15 days ago
Emirp Numbers (Long)
dokutan
101
63ms
16 days ago
Emirp Numbers
dokutan
101
61ms
16 days ago
99 Bottles of Beer
dokutan
407
63ms
16 days ago
Ascending Primes
dokutan
107
4,259ms
16 days ago
Abundant Numbers
dokutan
80
219ms
16 days ago
Abundant Numbers (Long)
dokutan
80
208ms
16 days ago
Christmas Trees
dokutan
306
63ms
16 days ago
24 Game
dokutan
🥉
5,019
73ms
16 days ago
12 Days of Christmas
dokutan
683
63ms
16 days ago
Arabic to Roman
dokutan
58
207ms
16 days ago
Arabic to Roman
JayXon
🥇
53
214ms
16 days ago
Roman to Arabic
JayXon
🥇
45
209ms
16 days ago
Prime Numbers (Long)
JayXon
🥇
19
63ms
16 days ago
Prime Numbers
JayXon
🥇
17
63ms
16 days ago
Minesweeper
edsrzf
💎
125
70ms
17 days ago
Game of Life
edsrzf
💎
126
64ms
17 days ago
Vampire Numbers
olleicua
1,078
59ms
18 days ago
Tutorial
Openstreetmapler
124
77ms
19 days ago
Factorial Factorisation
Babafaba
869
65ms
24 days ago
Collatz
snoozingnewt
96
69ms
21 Oct 2025
Pernicious Numbers
snoozingnewt
58
69ms
20 Oct 2025
Ellipse Perimeters
Shanethegamer
83
66ms
20 Oct 2025