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
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
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
Chars
Time
Submitted
Day of Week
Babafaba
22
366ms
95 mins ago
CSS Colors
blaztoma
80
178ms
6 hours ago
Tower of Hanoi
Shanethegamer
62
371ms
11 hours ago
ROT13
bitsandbeyond
62
211ms
25 hours ago
ASCII Table
snoozingnewt
146
182ms
2 days ago
τ
bitsandbeyond
🥈
57
255ms
2 days ago
π
bitsandbeyond
57
268ms
2 days ago
Rule 110
bitsandbeyond
🥈
70
252ms
3 days ago
Fractions
snoozingnewt
89
172ms
3 days ago
Tower of Hanoi
bitsandbeyond
51
186ms
3 days ago
Tutorial
Openstreetmapler
162
262ms
4 days ago
Kolakoski Sequence
snoozingnewt
80
230ms
5 days ago
Catalan Numbers
snoozingnewt
47
190ms
5 days ago
Day of Week
bstrautin
🥇
16
255ms
7 days ago
Kolakoski Sequence
bitsandbeyond
🥈
42
184ms
7 days ago
Pangram Grep
Ralac07
123
224ms
8 days ago
Calendar
bitsandbeyond
97
470ms
8 days ago
Minesweeper
bitsandbeyond
🦄
88
1,865ms
8 days ago
Niven Numbers (Long)
bitsandbeyond
🥉
39
3,978ms
10 days ago
Trinomial Triangle
dokutan
1,106
211ms
10 days ago
Leap Years
blaztoma
32
211ms
10 days ago
Partition Numbers
Feniske
126
843ms
10 days ago
Diamonds
bitsandbeyond
🥉
58
174ms
10 days ago
Gijswijt’s Sequence
bitsandbeyond
70
214ms
11 days ago
CSS Colors (Inverse)
bitsandbeyond
27
212ms
11 days ago
Semiprime Numbers
bitsandbeyond
59
3,357ms
11 days ago
Ellipse Perimeters
Shanethegamer
75
172ms
11 days ago
QR Encoder
bitsandbeyond
175
520ms
13 days ago
Gray Code Encoder
bitsandbeyond
30
345ms
14 days ago
Gray Code Decoder
bitsandbeyond
46
1,008ms
14 days ago
Pernicious Numbers
snoozingnewt
🥇
22
222ms
14 days ago
𝑒
bitsandbeyond
🥉
42
226ms
14 days ago
Niven Numbers
bitsandbeyond
29
189ms
14 days ago
Scrambled Sort
bitsandbeyond
🥈
63
713ms
14 days ago
Divisors
bitsandbeyond
🥈
33
234ms
15 days ago
Topological Sort
bitsandbeyond
💎
79
3,714ms
15 days ago
Day of Week
Emutis
17
212ms
15 days ago
Day of Week
blaztoma
17
197ms
16 days ago
CSS Colors
Emutis
82
232ms
16 days ago
Hilbert Curve
snoozingnewt
507
209ms
16 days ago
DFA Simulator
snoozingnewt
298
422ms
17 days ago
Fibonacci
MeddyBou
253
222ms
17 days ago
Game of Life
bitsandbeyond
🥈
84
319ms
17 days ago
Mahjong
bitsandbeyond
💎
123
4,261ms
18 days ago
Foo Fizz Buzz Bar
MeddyBou
960
236ms
18 days ago
Fizz Buzz
MeddyBou
304
179ms
19 days ago
Tutorial
luuumine
162
201ms
19 days ago
Medal Tally
bitsandbeyond
💎
85
400ms
19 days ago
Tutorial
Babafaba
162
269ms
19 days ago
SI Units
BREMAUCY
2,049
752ms
19 days ago
Polyominoes
bitsandbeyond
💎
106
3,984ms
19 days ago
Jacobi Symbol
bitsandbeyond
💎
89
319ms
20 days ago
Trinomial Triangle
nwellnhof
💎
50
208ms
20 days ago
Sudoku (Fill-in)
bitsandbeyond
💎
117
871ms
20 days ago
Smith Numbers
snoozingnewt
194
4,554ms
21 days ago
Van Eck Sequence
snoozingnewt
71
253ms
21 days ago
Odious Numbers
bitsandbeyond
🥈
27
179ms
21 days ago
Evil Numbers
bitsandbeyond
🥈
28
215ms
21 days ago
Inventory Sequence
snoozingnewt
86
2,642ms
21 days ago
Star Wars Opening Crawl
bitsandbeyond
💎
125
354ms
22 days ago
Leyland Numbers
snoozingnewt
83
261ms
22 days ago
Fizz Buzz
h3ra993huskp
109
223ms
22 days ago
SI Units
CaedenHarper
738
1,497ms
22 days ago
Tutorial
edsrzf
26
236ms
23 days ago
Tongue-twisters
JayXon
💎
154
267ms
23 days ago
SI Units
snoozingnewt
2,984
633ms
23 days ago
Rijndael S-box
bitsandbeyond
💎
86
332ms
23 days ago
SI Units
blaztoma
2,249
305ms
23 days ago
United States
bitsandbeyond
🥈
85
282ms
23 days ago
Ten-pin Bowling
bitsandbeyond
🥇
94
288ms
23 days ago
Factorial Factorisation
bitsandbeyond
💎
78
497ms
23 days ago
CSS Colors
KatieLG
81
248ms
23 days ago
Spelling Numbers
bitsandbeyond
💎
150
257ms
23 days ago
Odious Numbers
Babafaba
38
194ms
23 days ago
Tongue-twisters
bitsandbeyond
🥈
155
222ms
24 days ago