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
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
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
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
Lily
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
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
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
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
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
Calendar
dokutan
555
110ms
6 hours ago
99 Bottles of Beer
Matter1024
240
66ms
2 days ago
ASCII Table
Yewzir
169
64ms
3 days ago
ASCII Table
Matter1024
181
67ms
3 days ago
Tutorial
FortuiteMan
155
80ms
5 days ago
Arabic to Roman
dokutan
318
74ms
7 days ago
Look and Say
Matter1024
74
62ms
9 days ago
brainfuck
Matter1024
210
64ms
9 days ago
Multitap Input
dokutan
417
59ms
13 days ago
π
Matter1024
97
62ms
14 days ago
π
Andrey2001
1,016
55ms
14 days ago
Fibonacci
Andrey2001
47
58ms
15 days ago
Zodiac Signs
dokutan
491
64ms
16 days ago
Tutorial
Mefred
155
72ms
16 days ago
Repeating Decimals
Matter1024
170
63ms
20 days ago
Trinomial Triangle
Matter1024
104
63ms
21 days ago
Day of Week
Matter1024
119
143ms
22 days ago
Niven Numbers
Matter1024
78
64ms
22 days ago
Tutorial
Matter1024
69
63ms
23 days ago
Gray Code Decoder
GolfingSuccess
65
92ms
27 days ago
𝑒
JOrE20
1,016
54ms
5 Jan 2026
Tutorial
HumanoidCPU
69
72ms
1 Jan 2026
𝑒
dokutan
670
61ms
27 Dec 2025
√2
dokutan
661
59ms
27 Dec 2025
φ
dokutan
661
61ms
27 Dec 2025
τ
dokutan
666
61ms
27 Dec 2025
π
dokutan
661
61ms
27 Dec 2025
λ
dokutan
662
60ms
27 Dec 2025
γ
dokutan
659
57ms
27 Dec 2025
Van Eck Sequence
dokutan
1,237
60ms
27 Dec 2025
Vampire Numbers
dokutan
585
58ms
27 Dec 2025
Trinomial Triangle
dokutan
1,079
57ms
27 Dec 2025
Tongue-twisters
dokutan
325
58ms
27 Dec 2025
Smith Numbers
dokutan
1,090
59ms
27 Dec 2025
Sierpiński Triangle
dokutan
173
61ms
27 Dec 2025
Rijndael S-box
dokutan
506
60ms
27 Dec 2025
Prime Numbers (Long)
dokutan
2,835
61ms
27 Dec 2025
Polyominoes
dokutan
922
57ms
27 Dec 2025
Number Spiral
dokutan
246
60ms
27 Dec 2025
N Queens
dokutan
699
61ms
27 Dec 2025
Mandelbrot
dokutan
309
59ms
27 Dec 2025
Lucky Numbers
dokutan
2,399
61ms
27 Dec 2025
ln 2
dokutan
661
64ms
27 Dec 2025
Kolakoski Constant
dokutan
663
60ms
27 Dec 2025
Kaprekar Numbers
dokutan
349
59ms
27 Dec 2025
Hilbert Curve
dokutan
423
61ms
27 Dec 2025
Hexagonal Spiral
dokutan
266
57ms
27 Dec 2025
Happy Numbers
dokutan
147
58ms
27 Dec 2025
Gijswijt’s Sequence
dokutan
149
59ms
27 Dec 2025
Farey Sequence
dokutan
1,811
60ms
27 Dec 2025
Factorial Factorisation
dokutan
411
58ms
27 Dec 2025
Emirp Numbers
dokutan
165
56ms
27 Dec 2025
Divisors
dokutan
610
59ms
27 Dec 2025
Diamonds
dokutan
153
63ms
27 Dec 2025
Catalan’s Constant
dokutan
661
59ms
27 Dec 2025
Catalan Numbers
dokutan
1,763
59ms
27 Dec 2025
Ascending Primes
dokutan
333
58ms
27 Dec 2025
99 Bottles of Beer
dokutan
695
57ms
27 Dec 2025
24 Game
dokutan
1,990
60ms
27 Dec 2025
12 Days of Christmas
dokutan
454
60ms
27 Dec 2025
Hexagonal Spiral
bitsandbeyond
235
69ms
26 Dec 2025
Pernicious Numbers
snoozingnewt
41
56ms
8 Dec 2025
Multitap Input
Shanethegamer
149
64ms
6 Dec 2025
Tower of Hanoi
dokutan
122
67ms
1 Dec 2025
Spelling Numbers
dokutan
1,506
78ms
1 Dec 2025
Lucky Tickets
dokutan
7,455
67ms
1 Dec 2025
Tower of Hanoi
KatieLG
4,100
81ms
30 Nov 2025
Tower of Hanoi
HumanoidCPU
80
74ms
29 Nov 2025
𝑒
BREMAUCY
1,016
57ms
27 Nov 2025
Taxicab Numbers
Shanethegamer
4,177
58ms
27 Nov 2025
Taxicab Numbers
HumanoidCPU
4,177
59ms
27 Nov 2025
Smooth Numbers
GolfingSuccess
80
99ms
25 Nov 2025
Smooth Numbers
Shanethegamer
90
180ms
24 Nov 2025
Arrows
HumanoidCPU
222
88ms
23 Nov 2025
Prime Numbers (Long)
HumanoidCPU
63
198ms
23 Nov 2025
Prime Numbers
HumanoidCPU
60
64ms
23 Nov 2025
Arithmetic Numbers
HumanoidCPU
92
159ms
23 Nov 2025
PalindromemordnilaP
HumanoidCPU
111
84ms
22 Nov 2025
Leap Years
HumanoidCPU
49
63ms
22 Nov 2025
Leap Years
dokutan
45
61ms
19 Nov 2025