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
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
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
Happy Numbers (Long)
dokutan
558
65ms
5 hours ago
Tower of Hanoi
HumanoidCPU
3,583
80ms
19 hours ago
𝑒
JOrE20
1,013
69ms
19 hours ago
Tutorial
emgordon154
60
76ms
44 hours ago
ln 2
snoozingnewt
746
62ms
46 hours ago
π
snoozingnewt
752
66ms
46 hours ago
τ
snoozingnewt
747
66ms
46 hours ago
γ
snoozingnewt
748
67ms
46 hours ago
√2
snoozingnewt
756
67ms
46 hours ago
φ
snoozingnewt
754
66ms
46 hours ago
Kolakoski Constant
snoozingnewt
748
66ms
46 hours ago
𝑒
snoozingnewt
751
66ms
46 hours ago
Catalan’s Constant
snoozingnewt
751
66ms
47 hours ago
λ
snoozingnewt
745
66ms
3 days ago
Vampire Numbers
snoozingnewt
912
124ms
3 days ago
Sudoku (Fill-in)
snoozingnewt
🥉
1,080
281ms
3 days ago
Rijndael S-box
snoozingnewt
🥈
288
88ms
3 days ago
Tower of Hanoi
bitsandbeyond
73
80ms
4 days ago
Leap Years
blaztoma
38
63ms
5 days ago
Minesweeper
ovs-code
💎
127
229ms
6 days ago
Minesweeper
snoozingnewt
🥈
194
210ms
6 days ago
ASCII Table
snoozingnewt
146
80ms
6 days ago
12 Days of Christmas
DartGT8437
1,655
69ms
7 days ago
Forsyth–Edwards Notation
snoozingnewt
185
86ms
7 days ago
Pernicious Numbers
snoozingnewt
40
69ms
7 days ago
Set
snoozingnewt
🥉
130
812ms
7 days ago
Tutorial
Openstreetmapler
158
83ms
7 days ago
Tower of Hanoi
Shanethegamer
3,583
72ms
8 days ago
Time Distance
snoozingnewt
302
80ms
9 days ago
Proximity Grid
snoozingnewt
438
4,398ms
9 days ago
Zodiac Signs
snoozingnewt
🥉
448
121ms
13 days ago
Zeckendorf Representation
snoozingnewt
144
78ms
13 days ago
Topological Sort
snoozingnewt
🥉
467
240ms
13 days ago
Star Wars Opening Crawl
snoozingnewt
🥉
578
93ms
13 days ago
Medal Tally
snoozingnewt
325
111ms
13 days ago
Lucky Tickets
snoozingnewt
245
86ms
13 days ago
ISBN
snoozingnewt
120
76ms
13 days ago
Intersection
snoozingnewt
158
78ms
13 days ago
Fractions
snoozingnewt
128
76ms
13 days ago
Ten-pin Bowling
snoozingnewt
300
90ms
13 days ago
𝑒
Babafaba
1,013
64ms
14 days ago
Ellipse Perimeters
Shanethegamer
93
72ms
14 days ago
N Queens
snoozingnewt
🥈
126
87ms
15 days ago
Van Eck Sequence
snoozingnewt
64
91ms
15 days ago
Morse Decoder
snoozingnewt
🥉
298
83ms
15 days ago
Morse Encoder
snoozingnewt
🥉
334
93ms
15 days ago
PalindromemordnilaP
snoozingnewt
177
86ms
15 days ago
Seven Segment
snoozingnewt
267
82ms
15 days ago
Card Number Validation
snoozingnewt
🥉
95
75ms
15 days ago
Arrows
snoozingnewt
243
99ms
15 days ago
Diamonds
snoozingnewt
🥉
132
77ms
15 days ago
Christmas Trees
snoozingnewt
92
78ms
15 days ago
Sierpiński Triangle
snoozingnewt
94
75ms
15 days ago
Reverse Polish Notation
snoozingnewt
181
119ms
16 days ago
Rule 110
snoozingnewt
170
80ms
16 days ago
Happy Numbers
snoozingnewt
84
77ms
16 days ago
Happy Numbers (Long)
snoozingnewt
84
81ms
16 days ago
Emirp Numbers (Long)
dokutan
828
71ms
16 days ago
Arabic to Roman
snoozingnewt
🥇
40
99ms
16 days ago
Mandelbrot
snoozingnewt
141
206ms
17 days ago
Arrows
SteveHales
208
90ms
17 days ago
Jacobi Symbol
snoozingnewt
239
82ms
18 days ago
Hilbert Curve
snoozingnewt
🥉
565
77ms
18 days ago
Game of Life
snoozingnewt
309
95ms
18 days ago
brainfuck
snoozingnewt
231
586ms
18 days ago
Emojify
snoozingnewt
306
81ms
18 days ago
Gijswijt’s Sequence
snoozingnewt
156
2,339ms
18 days ago
Look and Say
snoozingnewt
66
92ms
18 days ago
Lucky Numbers
snoozingnewt
70
150ms
18 days ago
Kolakoski Sequence
snoozingnewt
70
71ms
18 days ago
Tongue-twisters
snoozingnewt
359
72ms
19 days ago
Spelling Numbers
snoozingnewt
471
93ms
19 days ago
DFA Simulator
snoozingnewt
🥈
239
87ms
19 days ago
24 Game
EthanSansom
526
3,091ms
20 days ago
Evil Numbers
EthanSansom
55
74ms
20 days ago