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
Continued Fractions
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
Multitap Input
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
Alphabetic Numbers
Apéry’s Constant
Binary Lambda Calculus
Connect Four
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
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
All Languages
><>
ALGOL 68
ArkScript
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
APL
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Lily
Luau
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
Umka
Vala
Vyxal
Bytes
Chars
Scoring
Bytes
Chars
Language
All
><>
ALGOL 68
ArkScript
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
APL
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Lily
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
Continued Fractions
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
Multitap Input
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
Alphabetic Numbers
Apéry’s Constant
Binary Lambda Calculus
Connect Four
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
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
Hole
Golfer
Bytes
Time
Submitted
Hilbert Curve
dokutan
611
303ms
3 hours ago
𝑒
dokutan
897
290ms
33 hours ago
√2
dokutan
900
281ms
33 hours ago
φ
dokutan
901
276ms
33 hours ago
τ
dokutan
900
278ms
33 hours ago
π
dokutan
895
277ms
33 hours ago
λ
dokutan
899
266ms
33 hours ago
γ
dokutan
899
288ms
33 hours ago
Van Eck Sequence
dokutan
1,511
284ms
33 hours ago
Vampire Numbers
dokutan
876
281ms
33 hours ago
Trinomial Triangle
dokutan
1,359
287ms
33 hours ago
Tower of Hanoi
dokutan
363
286ms
33 hours ago
Smith Numbers
dokutan
1,367
279ms
33 hours ago
Sierpiński Triangle
dokutan
335
270ms
33 hours ago
Rule 110
dokutan
1,429
279ms
33 hours ago
Rijndael S-box
dokutan
777
280ms
33 hours ago
Recamán
dokutan
792
282ms
33 hours ago
Prime Numbers (Long)
dokutan
3,756
292ms
33 hours ago
Prime Numbers
dokutan
291
275ms
33 hours ago
Polyominoes
dokutan
1,107
273ms
33 hours ago
Pernicious Numbers (Long)
dokutan
13,607
286ms
33 hours ago
Pernicious Numbers
dokutan
307
273ms
33 hours ago
Pascal’s Triangle
dokutan
655
275ms
33 hours ago
Partition Numbers
dokutan
667
276ms
33 hours ago
Odious Numbers (Long)
dokutan
1,479
274ms
33 hours ago
Odious Numbers
dokutan
293
280ms
33 hours ago
Number Spiral
dokutan
428
282ms
33 hours ago
Niven Numbers (Long)
dokutan
4,716
266ms
33 hours ago
Niven Numbers
dokutan
303
279ms
33 hours ago
N Queens
dokutan
871
285ms
33 hours ago
Mandelbrot
dokutan
472
289ms
33 hours ago
Lucky Numbers
dokutan
3,081
281ms
33 hours ago
Look and Say
dokutan
540
270ms
33 hours ago
ln 2
dokutan
897
289ms
33 hours ago
Leyland Numbers
dokutan
807
269ms
33 hours ago
Leap Years
dokutan
533
283ms
33 hours ago
Kolakoski Sequence
dokutan
389
275ms
33 hours ago
Kolakoski Constant
dokutan
899
284ms
33 hours ago
Kaprekar Numbers
dokutan
517
274ms
33 hours ago
Inventory Sequence
dokutan
1,393
278ms
33 hours ago
Hexagonal Spiral
dokutan
443
279ms
33 hours ago
Happy Numbers (Long)
dokutan
581
275ms
33 hours ago
Happy Numbers
dokutan
316
286ms
33 hours ago
Gijswijt’s Sequence
dokutan
311
281ms
33 hours ago
Foo Fizz Buzz Bar
dokutan
1,329
272ms
33 hours ago
Tongue-twisters
prestosilver
592
264ms
37 hours ago
Fizz Buzz
dokutan
401
287ms
6 days ago
Fibonacci
dokutan
333
271ms
6 days ago
Farey Sequence
dokutan
2,355
276ms
6 days ago
Factorial Factorisation
dokutan
707
269ms
6 days ago
Evil Numbers (Long)
dokutan
1,480
271ms
6 days ago
Evil Numbers
dokutan
291
273ms
6 days ago
Emirp Numbers (Long)
dokutan
901
289ms
6 days ago
Emirp Numbers
dokutan
329
279ms
6 days ago
Divisors
dokutan
793
285ms
6 days ago
Diamonds
dokutan
316
292ms
6 days ago
Cubes
dokutan
695
283ms
6 days ago
Collatz
dokutan
1,515
272ms
6 days ago
Christmas Trees
dokutan
371
275ms
6 days ago
Catalan’s Constant
dokutan
896
282ms
6 days ago
Catalan Numbers
dokutan
2,180
273ms
6 days ago
ASCII Table
dokutan
484
281ms
6 days ago
Ascending Primes
dokutan
496
272ms
6 days ago
Arithmetic Numbers
dokutan
23,285
281ms
6 days ago
Abundant Numbers (Long)
dokutan
843
281ms
6 days ago
Abundant Numbers
dokutan
349
273ms
6 days ago
99 Bottles of Beer
dokutan
1,373
297ms
6 days ago
24 Game
dokutan
4,419
276ms
6 days ago
12 Days of Christmas
dokutan
637
296ms
6 days ago
Tongue-twisters
dokutan
487
271ms
6 days ago
Fizz Buzz
madex
188
272ms
7 days ago
Pernicious Numbers
GolfingSuccess
86
245ms
8 days ago
Alphabetic Numbers
HumanoidCPU
3,948
239ms
16 days ago
Quine
LostSyntax21
262
323ms
26 days ago
√2
edsrzf
166
404ms
20 Feb 2026
Tutorial
FortuiteMan
272
540ms
3 Feb 2026
π
Andrey2001
1,059
316ms
25 Jan 2026
Tutorial
Mefred
272
571ms
15 Jan 2026
Niven Numbers
DialFrost
92
291ms
12 Jan 2026
𝑒
JOrE20
1,056
377ms
5 Jan 2026