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
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
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
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
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
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
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
Snake
Sphenic Numbers
Trinomial Triangle
Turtle
Tutorial
Hole
Golfer
Bytes
Submitted
Arrows
edsrzf
186
5 hours ago
𝑒
kg583
82
7 hours ago
Ascending Primes
edsrzf
🥇
99
7 hours ago
Tutorial
snoozingnewt
65
7 hours ago
Odious Numbers (Long)
snoozingnewt
86
13 hours ago
Odious Numbers
snoozingnewt
85
13 hours ago
Evil Numbers (Long)
snoozingnewt
88
13 hours ago
Evil Numbers
snoozingnewt
86
13 hours ago
Emojify
edsrzf
💎
130
25 hours ago
Happy Numbers (Long)
snoozingnewt
118
40 hours ago
Happy Numbers
snoozingnewt
117
41 hours ago
Fibonacci
snoozingnewt
68
2 days ago
Pangram Grep
snoozingnewt
128
3 days ago
Poker
edsrzf
💎
388
3 days ago
Repeating Decimals
edsrzf
127
4 days ago
ISBN
kg583
131
4 days ago
Sierpiński Triangle
emgordon154
121
4 days ago
Morse Encoder
Maximizer02
581
4 days ago
Hilbert Curve
mishak-sys
5,159
4 days ago
Reversi
edsrzf
🥇
130
6 days ago
Fibonacci
Decrare
52
6 days ago
Day of Week
DialFrost
🥇
66
8 days ago
λ
blaztoma
1,240
9 days ago
Divisors
kg583
66
10 days ago
Lucky Numbers
kg583
💎
96
10 days ago
Divisors
snoozingnewt
98
10 days ago
Maze
kg583
🥈
170
10 days ago
Seven Segment
kg583
🥈
156
10 days ago
Seven Segment
edsrzf
🥈
156
10 days ago
Arrows
emgordon154
🥉
166
11 days ago
ASCII Table
edsrzf
124
11 days ago
Tutorial
Maximizer02
85
12 days ago
Inventory Sequence
blaztoma
150
12 days ago
Morse Encoder
kg583
💎
199
13 days ago
Rijndael S-box
kg583
💎
216
13 days ago
Day of Week
pardouin
🥇
66
13 days ago
Day of Week
edsrzf
🥇
66
14 days ago
Levenshtein Distance
kg583
181
14 days ago
CSS Colors
dokutan
2,610
15 days ago
United States
edsrzf
💎
126
17 days ago
Hilbert Curve
CaedenHarper
🥈
5,126
17 days ago
Spelling Numbers
kg583
104
18 days ago
Abundant Numbers
kg583
🥈
67
19 days ago
12 Days of Christmas
madeforlosers
2,494
19 days ago
Reversi
kg583
146
21 days ago
PalindromemordnilaP
kg583
109
22 days ago
Medal Tally
kg583
184
23 days ago
Partition Numbers
kg583
105
23 days ago
Repeating Decimals
error256
128
23 days ago
Repeating Decimals
kg583
🥇
112
23 days ago
Fizz Buzz
kg583
84
24 days ago
Forsyth–Edwards Notation
kg583
🥉
172
24 days ago
Tutorial
Vexxter9
151
24 days ago
Scrambled Sort
kg583
128
24 days ago
Transpose Sentence
kg583
108
24 days ago
Transpose Sentence
edsrzf
98
24 days ago
𝑒
sean-niemann
🥇
60
24 days ago
Leap Years
kg583
🥇
55
25 days ago
Morse Decoder
kg583
🥈
200
25 days ago
Fractions
sean-niemann
76
26 days ago
Fractions
kg583
76
27 days ago
Inventory Sequence
kg583
🥈
88
27 days ago
Zeckendorf Representation
kg583
🥈
140
27 days ago
Vampire Numbers
kg583
161
27 days ago
Smith Numbers
kg583
🥇
170
27 days ago
Jacobi Symbol
kg583
🥈
195
27 days ago
Arithmetic Numbers
kg583
109
27 days ago
Proximity Grid
edsrzf
💎
146
27 days ago
ASCII Table
error256
131
27 days ago
Sierpiński Triangle
sean-niemann
🥈
85
18 Aug 2025
Happy Numbers (Long)
kg583
🥉
101
18 Aug 2025
ASCII Table
sean-niemann
🥇
123
18 Aug 2025
Ten-pin Bowling
sean-niemann
🥈
143
17 Aug 2025
Spelling Numbers
sean-niemann
🥇
100
17 Aug 2025
Look and Say
kg583
🥉
85
17 Aug 2025