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
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
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
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
Transpose Sentence
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 Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
Hilbert Curve
Mandelbrot
Minesweeper
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
QR Encoder
Quadratic Formula
Scrambled Alphabetization
Semiprime Numbers
Snake
Sphenic Numbers
Trinomial Triangle
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
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
Groovy
Harbour
Hare
Haxe
Hush
Hy
iogii
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
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
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
Groovy
Harbour
Hare
Haxe
Hush
Hy
iogii
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
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
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
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
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
Transpose Sentence
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 Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
Hilbert Curve
Mandelbrot
Minesweeper
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
QR Encoder
Quadratic Formula
Scrambled Alphabetization
Semiprime Numbers
Snake
Sphenic Numbers
Trinomial Triangle
Turtle
Tutorial
Hole
Golfer
Bytes
Submitted
Connect Four
ovs-code
171
35 hours ago
Trinomial Triangle
KatieLG
2,246
11 days ago
Sphenic Numbers
KatieLG
25,059
11 days ago
Semiprime Numbers
KatieLG
36,413
11 days ago
Odd Polyomino Tiling
KatieLG
23,293
11 days ago
Mandelbrot
KatieLG
10,372
11 days ago
Hilbert Curve
KatieLG
5,405
11 days ago
Highly Composite Numbers
KatieLG
940
11 days ago
Hexagonal Spiral
KatieLG
1,449
11 days ago
Recamán
codereport
84
17 days ago
Hexagonal Spiral
Shanethegamer
1,142
17 days ago
Niven Numbers
codereport
41
18 days ago
Niven Numbers (Long)
codereport
43
18 days ago
Odious Numbers (Long)
codereport
50
18 days ago
Odious Numbers
codereport
49
18 days ago
Prime Numbers (Long)
codereport
61
18 days ago
Prime Numbers
codereport
45
18 days ago
Emirp Numbers
codereport
84
18 days ago
𝑒
KatieLG
1,011
18 days ago
√2
KatieLG
1,011
18 days ago
φ
KatieLG
1,011
18 days ago
τ
KatieLG
1,011
18 days ago
π
KatieLG
1,011
18 days ago
λ
KatieLG
1,011
18 days ago
γ
KatieLG
1,011
18 days ago
Van Eck Sequence
KatieLG
11,554
18 days ago
Vampire Numbers
KatieLG
2,465
18 days ago
Tongue-twisters
KatieLG
648
18 days ago
Smith Numbers
KatieLG
5,207
18 days ago
Sierpiński Triangle
KatieLG
697
18 days ago
Rule 110
KatieLG
16,751
18 days ago
Rijndael S-box
KatieLG
911
18 days ago
Recamán
KatieLG
3,146
18 days ago
Prime Numbers (Long)
KatieLG
17,008
18 days ago
Prime Numbers
KatieLG
295
18 days ago
Polyominoes
KatieLG
14,957
18 days ago
Pernicious Numbers (Long)
KatieLG
58,929
18 days ago
Pernicious Numbers
KatieLG
414
18 days ago
Pascal’s Triangle
KatieLG
948
18 days ago
Partition Numbers
KatieLG
1,546
18 days ago
Odious Numbers (Long)
KatieLG
6,444
18 days ago
Odious Numbers
KatieLG
306
18 days ago
Number Spiral
KatieLG
389
18 days ago
Niven Numbers (Long)
KatieLG
21,279
18 days ago
Niven Numbers
KatieLG
387
18 days ago
N Queens
KatieLG
2,577
18 days ago
Lucky Numbers
KatieLG
13,819
18 days ago
Look and Say
KatieLG
1,458
18 days ago
ln 2
KatieLG
1,011
18 days ago
Leyland Numbers
KatieLG
1,848
18 days ago
Leap Years
KatieLG
2,043
18 days ago
Kolakoski Sequence
KatieLG
2,008
18 days ago
Kolakoski Constant
KatieLG
1,011
18 days ago
Kaprekar Numbers
KatieLG
1,051
18 days ago
Inventory Sequence
KatieLG
11,622
18 days ago
Happy Numbers (Long)
KatieLG
1,838
18 days ago
Happy Numbers
KatieLG
394
18 days ago
Gijswijt’s Sequence
KatieLG
10,999
18 days ago
Foo Fizz Buzz Bar
KatieLG
14,718
18 days ago
Fizz Buzz
KatieLG
1,312
18 days ago
Fibonacci
KatieLG
412
18 days ago
Farey Sequence
KatieLG
11,328
18 days ago
Factorial Factorisation
KatieLG
870
18 days ago
Evil Numbers (Long)
KatieLG
6,458
18 days ago
Evil Numbers
KatieLG
294
18 days ago
Emirp Numbers (Long)
KatieLG
3,315
18 days ago
Emirp Numbers
KatieLG
459
18 days ago
Divisors
KatieLG
2,065
18 days ago
Diamonds
KatieLG
1,903
18 days ago
Cubes
KatieLG
5,099
18 days ago
Collatz
KatieLG
12,225
18 days ago
Christmas Trees
KatieLG
1,039
18 days ago
Catalan’s Constant
KatieLG
1,011
18 days ago
Catalan Numbers
KatieLG
3,771
18 days ago
Ascending Primes
KatieLG
1,411
18 days ago