Recent Solutions
Achievements
Cheevos
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
Tower of Hanoi
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
Continued Fractions
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
Taxicab Numbers
Turtle
Tutorial
All Languages
><>
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Common Lisp
Crystal
D
Dart
Elixir
Erlang
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
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
Erlang
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
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
Tower of Hanoi
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
Continued Fractions
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
Taxicab Numbers
Turtle
Tutorial
Hole
Golfer
Bytes
Time
Submitted
PalindromemordnilaP
Yewzir
179
10ms
23 mins ago
PalindromemordnilaP
CornerMercury
81
14ms
67 mins ago
Sudoku (Fill-in)
CornerMercury
238
34ms
116 mins ago
Van Eck Sequence
sisyphus-ppcg
60
11ms
2 hours ago
Tower of Hanoi
vhoulbreque
59
11ms
2 hours ago
Tower of Hanoi
LostSyntax21
76
11ms
3 hours ago
Roman to Arabic
snoozingnewt
128
17ms
3 hours ago
Tower of Hanoi
ryyyn
58
12ms
3 hours ago
Tower of Hanoi
KatieLG
57
11ms
3 hours ago
Tower of Hanoi
lukegustafson
54
11ms
3 hours ago
PalindromemordnilaP
Seek64
🥇
80
14ms
5 hours ago
PalindromemordnilaP
LostSyntax21
91
9ms
5 hours ago
Forsyth–Edwards Notation
blaztoma
139
10ms
5 hours ago
Tower of Hanoi
FortuiteMan
57
11ms
5 hours ago
Tower of Hanoi
plcc0
74
11ms
5 hours ago
Morse Encoder
Lv0Sys
184
9ms
6 hours ago
Rijndael S-box
vhoulbreque
249
26ms
6 hours ago
24 Game
solisolu
457
22ms
6 hours ago
Card Number Validation
KasperKivimaeki
93
16ms
7 hours ago
Morse Decoder
Lv0Sys
217
10ms
7 hours ago
Factorial Factorisation
IshanPanpaliya
115
10ms
7 hours ago
PalindromemordnilaP
ovs-code
86
10ms
7 hours ago
12 Days of Christmas
kasarino
552
10ms
8 hours ago
PalindromemordnilaP
FortuiteMan
91
10ms
8 hours ago
Diamonds
vhoulbreque
136
9ms
8 hours ago
PalindromemordnilaP
KasperKivimaeki
89
9ms
9 hours ago
Vampire Numbers
Andrey2001
1,083
10ms
9 hours ago
Factorial Factorisation
KasperKivimaeki
103
65ms
9 hours ago
Tower of Hanoi
zacjl
56
11ms
9 hours ago
Intersection
CornerMercury
129
19ms
10 hours ago
Intersection
zacjl
112
20ms
11 hours ago
Sierpiński Triangle
Andrey2001
220
10ms
11 hours ago
Tower of Hanoi
Emutis
3,589
11ms
11 hours ago
Tower of Hanoi
Yewzir
73
11ms
11 hours ago
CSS Colors
vhoulbreque
2,084
85ms
11 hours ago
Tongue-twisters
Andrey2001
392
9ms
11 hours ago
Leap Years
CommandLeo
47
15ms
11 hours ago
Arrows
CommandLeo
173
11ms
12 hours ago
Intersection
sunleonid
🥇
108
18ms
12 hours ago
12 Days of Christmas
vhoulbreque
464
9ms
13 hours ago
Tower of Hanoi
blaztoma
57
11ms
14 hours ago
SI Units
sean-niemann
522
20ms
16 hours ago
Intersection
ovs-code
113
20ms
16 hours ago
Intersection
Seek64
114
17ms
16 hours ago
Tower of Hanoi
BREMAUCY
74
11ms
17 hours ago
Arabic to Roman
TJK-S
405
20ms
17 hours ago
Intersection
sisyphus-ppcg
112
20ms
18 hours ago
12 Days of Christmas
Lv0Sys
452
10ms
18 hours ago
ISBN
jared-hughes
99
10ms
19 hours ago
Recamán
snoozingnewt
63
10ms
19 hours ago
Intersection
jared-hughes
119
21ms
20 hours ago
Abundant Numbers (Long)
IshanPanpaliya
66
30ms
20 hours ago
Abundant Numbers
IshanPanpaliya
65
10ms
20 hours ago
Fizz Buzz
IshanPanpaliya
59
10ms
21 hours ago
Transpose Sentence
LostSyntax21
108
11ms
22 hours ago
Time Distance
LostSyntax21
320
17ms
22 hours ago
Sierpiński Triangle
LostSyntax21
133
9ms
22 hours ago
Pernicious Numbers
LostSyntax21
53
9ms
22 hours ago
Foo Fizz Buzz Bar
LostSyntax21
🥇
83
11ms
22 hours ago
Van Eck Sequence
LostSyntax21
86
15ms
22 hours ago
Seven Segment
LostSyntax21
212
10ms
22 hours ago
Arithmetic Numbers
IshanPanpaliya
83
1,476ms
22 hours ago
Intersection
xsot
119
34ms
23 hours ago
ISBN
kg583
99
9ms
24 hours ago
Intersection
xnor-gate
115
20ms
25 hours ago
Smooth Numbers
khvdm
80
664ms
26 hours ago
ISBN
CaedenHarper
100
10ms
26 hours ago
ASCII Table
vhoulbreque
141
16ms
26 hours ago
Continued Fractions
khvdm
123
10ms
26 hours ago
Morse Decoder
FortuiteMan
223
10ms
27 hours ago
Polyominoes
KatieLG
284
475ms
27 hours ago
Scrambled Sort
solisolu
110
11ms
28 hours ago
Tower of Hanoi
TheZwierzLF
74
11ms
28 hours ago
Number Spiral
Andrey2001
262
16ms
29 hours ago
Farey Sequence
sunleonid
🥇
66
10ms
29 hours ago