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
Calendar
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
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
Multitap Input
NFA Simulator
Numbrix
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
ArkScript
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
ArkScript
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
Calendar
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
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
Multitap Input
NFA Simulator
Numbrix
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
Zeckendorf Representation
anter69
125
11ms
58 mins ago
Tongue-twisters
retrohun
718
1,878ms
76 mins ago
Smith Numbers
retrohun
2,381
1,701ms
76 mins ago
Sierpiński Triangle
retrohun
751
1,731ms
77 mins ago
Recamán
retrohun
1,328
1,736ms
77 mins ago
Rule 110
retrohun
16,133
1,690ms
77 mins ago
Prime Numbers (Long)
retrohun
7,358
1,655ms
79 mins ago
Prime Numbers
retrohun
277
1,764ms
79 mins ago
Pernicious Numbers (Long)
retrohun
25,095
1,750ms
80 mins ago
Pernicious Numbers
retrohun
316
1,774ms
80 mins ago
Pascal’s Triangle
retrohun
970
1,722ms
81 mins ago
Odious Numbers
retrohun
280
1,725ms
81 mins ago
Odious Numbers (Long)
retrohun
2,626
1,645ms
81 mins ago
Number Spiral
retrohun
491
1,688ms
82 mins ago
Lucky Numbers
retrohun
6,001
1,769ms
83 mins ago
Look and Say
retrohun
1,480
1,712ms
83 mins ago
Leyland Numbers
retrohun
1,174
1,696ms
83 mins ago
Leap Years
retrohun
1,057
1,666ms
84 mins ago
Kolakoski Sequence
retrohun
2,182
1,812ms
84 mins ago
Inventory Sequence
retrohun
3,804
1,858ms
84 mins ago
Happy Numbers (Long)
retrohun
876
1,721ms
84 mins ago
Happy Numbers
retrohun
320
1,742ms
85 mins ago
Tower of Hanoi
primo-ppcg
49
3ms
85 mins ago
Tutorial
retrohun
347
2,197ms
87 mins ago
Vampire Numbers
retrohun
1,407
1,731ms
88 mins ago
Van Eck Sequence
retrohun
3,736
1,620ms
89 mins ago
Niven Numbers (Long)
retrohun
9,157
1,719ms
90 mins ago
Niven Numbers
retrohun
305
1,724ms
90 mins ago
Foo Fizz Buzz Bar
retrohun
6,900
1,878ms
93 mins ago
Fizz Buzz
retrohun
694
1,618ms
94 mins ago
Evil Numbers (Long)
retrohun
2,632
1,702ms
95 mins ago
Emirp Numbers (Long)
retrohun
1,577
1,678ms
95 mins ago
Divisors
retrohun
1,447
1,699ms
96 mins ago
Diamonds
retrohun
1,373
1,677ms
97 mins ago
Cubes
retrohun
4,393
1,697ms
97 mins ago
Collatz
retrohun
4,407
1,844ms
98 mins ago
Christmas Trees
retrohun
781
1,669ms
99 mins ago
Emirp Numbers
retrohun
353
1,640ms
99 mins ago
Kolakoski Constant
retrohun
1,185
1,774ms
100 mins ago
λ
retrohun
1,185
1,723ms
101 mins ago
π
retrohun
1,185
1,699ms
101 mins ago
τ
retrohun
1,185
1,754ms
102 mins ago
φ
retrohun
1,185
1,690ms
102 mins ago
Catalan’s Constant
retrohun
1,185
1,658ms
103 mins ago
Catalan Numbers
retrohun
3,153
1,622ms
103 mins ago
Abundant Numbers (Long)
retrohun
1,391
1,763ms
113 mins ago
Abundant Numbers
retrohun
390
1,765ms
114 mins ago
99 Bottles of Beer
retrohun
12,365
1,672ms
115 mins ago
12 Days of Christmas
retrohun
2,663
1,735ms
117 mins ago
Pernicious Numbers (Long)
DialFrost
🥉
60
24ms
2 hours ago
Pangram Grep
JayXon
💎
167
1,827ms
2 hours ago
Trinomial Triangle
primo-ppcg
💎
78
39ms
3 hours ago
Reversi
edsrzf
🥉
141
133ms
5 hours ago
Topological Sort
edsrzf
💎
155
117ms
5 hours ago
Hexdump
edsrzf
💎
236
105ms
5 hours ago
Proximity Grid
edsrzf
💎
151
121ms
5 hours ago
Fibonacci
snyderek
48
51ms
6 hours ago
Topological Sort
albanian-laundromat
🥈
252
288ms
7 hours ago
Topological Sort
albanian-laundromat
🥈
199
1,430ms
7 hours ago
PalindromemordnilaP
albanian-laundromat
💎
201
4ms
8 hours ago
Topological Sort
albanian-laundromat
🦄
336
506ms
9 hours ago
Multitap Input
Natanaelel
138
176ms
9 hours ago
Topological Sort
jgbaldwinbrown
240
4ms
9 hours ago
Card Number Validation
ryyyn
86
19ms
9 hours ago
Arrows
kg583
120
588ms
10 hours ago
Arrows
kg583
130
32ms
10 hours ago
Minesweeper
KatieLG
190
593ms
10 hours ago
Minesweeper
KatieLG
190
31ms
10 hours ago
Fibonacci
FoxInTheClouds
45
30ms
10 hours ago
Fibonacci
FoxInTheClouds
54
2ms
10 hours ago
Lucky Numbers
kg583
56
12ms
11 hours ago
Pernicious Numbers (Long)
Pyroan
76
24ms
11 hours ago
24 Game
amazingalek
12,450
376ms
12 hours ago
Fizz Buzz
BREMAUCY
108
140ms
12 hours ago
Collatz
Pyroan
84
5ms
12 hours ago
Polyominoes
amazingalek
3,582
399ms
12 hours ago
N Queens
amazingalek
1,018
378ms
12 hours ago
Cubes
canissimia
💎
165
3ms
12 hours ago
Zodiac Signs
Pyroan
235
21ms
12 hours ago
Set
error256
🥈
166
132ms
12 hours ago