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
Multitap Input
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
Multitap Input
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
Tongue-twisters
JOrE20
523
131ms
99 mins ago
Tower of Hanoi
KatieLG
3,579
134ms
5 days ago
𝑒
BREMAUCY
1,003
129ms
8 days ago
Taxicab Numbers
HumanoidCPU
4,160
179ms
8 days ago
Taxicab Numbers
Shanethegamer
4,160
134ms
9 days ago
Smooth Numbers
kg583
12
1,001ms
12 days ago
Continued Fractions
kg583
34
182ms
16 days ago
Kolakoski Sequence
HumanoidCPU
2,000
145ms
22 days ago
Hilbert Curve
JOrE20
5,118
153ms
26 days ago
Tower of Hanoi
HumanoidCPU
3,577
148ms
6 Nov 2025
Tower of Hanoi
kg583
23
261ms
30 Oct 2025
Tower of Hanoi
Shanethegamer
3,577
165ms
30 Oct 2025
Tutorial
Babafaba
76
333ms
15 Oct 2025
Quine
snoozingnewt
5
130ms
12 Oct 2025
Tutorial
snoozingnewt
17
311ms
15 Sep 2025
Fizz Buzz
snoozingnewt
25
278ms
14 Sep 2025
Fizz Buzz
madex
44
299ms
3 Sep 2025
Fizz Buzz
CaedenHarper
44
291ms
28 Aug 2025
Tutorial
Vexxter9
76
320ms
21 Aug 2025
Hexagonal Spiral
HumanoidCPU
1,135
140ms
18 Aug 2025
Highly Composite Numbers
HumanoidCPU
392
136ms
18 Aug 2025
Hilbert Curve
HumanoidCPU
5,118
140ms
18 Aug 2025
Abundant Numbers (Long)
HumanoidCPU
964
141ms
18 Aug 2025
Polyominoes
HumanoidCPU
3,564
140ms
18 Aug 2025
Recamán
HumanoidCPU
897
140ms
18 Aug 2025
Rule 110
HumanoidCPU
15,852
158ms
18 Aug 2025
Pascal’s Triangle
HumanoidCPU
769
141ms
18 Aug 2025
Kaprekar Numbers
HumanoidCPU
440
136ms
18 Aug 2025
Happy Numbers
HumanoidCPU
107
137ms
18 Aug 2025
Happy Numbers (Long)
HumanoidCPU
552
140ms
18 Aug 2025
Emirp Numbers (Long)
HumanoidCPU
1,156
139ms
18 Aug 2025
Catalan Numbers
HumanoidCPU
2,872
142ms
18 Aug 2025
Tongue-twisters
HumanoidCPU
523
140ms
18 Aug 2025
Look and Say
HumanoidCPU
1,279
138ms
15 Aug 2025
Farey Sequence
HumanoidCPU
4,354
145ms
15 Aug 2025
Diamonds
HumanoidCPU
1,103
141ms
14 Aug 2025
Niven Numbers
HumanoidCPU
91
134ms
14 Aug 2025
Lucky Numbers
HumanoidCPU
4,820
144ms
14 Aug 2025
Inventory Sequence
HumanoidCPU
2,623
141ms
14 Aug 2025
Gijswijt’s Sequence
HumanoidCPU
2,000
142ms
14 Aug 2025
Smith Numbers
HumanoidCPU
1,824
137ms
14 Aug 2025
Arithmetic Numbers
HumanoidCPU
37,642
293ms
14 Aug 2025
Odious Numbers (Long)
HumanoidCPU
1,945
136ms
14 Aug 2025
Evil Numbers (Long)
HumanoidCPU
1,950
138ms
14 Aug 2025
N Queens
HumanoidCPU
1,246
132ms
14 Aug 2025
Pernicious Numbers (Long)
HumanoidCPU
20,662
195ms
14 Aug 2025
Divisors
HumanoidCPU
1,166
135ms
14 Aug 2025
Foo Fizz Buzz Bar
HumanoidCPU
5,719
148ms
14 Aug 2025
Prime Numbers (Long)
HumanoidCPU
5,948
146ms
14 Aug 2025
Niven Numbers (Long)
HumanoidCPU
7,438
153ms
14 Aug 2025
Van Eck Sequence
HumanoidCPU
2,555
137ms
13 Aug 2025
Abundant Numbers
HumanoidCPU
163
144ms
13 Aug 2025
Odious Numbers
HumanoidCPU
73
152ms
11 Aug 2025
Evil Numbers
HumanoidCPU
70
138ms
10 Aug 2025
Trinomial Triangle
HumanoidCPU
2,067
141ms
6 Aug 2025
Rijndael S-box
HumanoidCPU
768
144ms
4 Aug 2025
Prime Numbers
HumanoidCPU
71
141ms
2 Aug 2025
Sierpiński Triangle
HumanoidCPU
554
141ms
2 Aug 2025
Sphenic Numbers
HumanoidCPU
8,860
157ms
29 Jul 2025
π
Ralac07
1,005
137ms
28 Jul 2025
Semiprime Numbers
HumanoidCPU
12,789
166ms
28 Jul 2025
Scrambled Sort
emgordon154
19
278ms
13 Jul 2025
Tutorial
Bpc-CPU
76
306ms
12 Jul 2025
Fibonacci
HumanoidCPU
134
136ms
30 Jun 2025
Mandelbrot
HumanoidCPU
10,004
141ms
30 Jun 2025
Number Spiral
HumanoidCPU
300
138ms
27 Jun 2025
Collatz
HumanoidCPU
3,226
137ms
20 Jun 2025
Ascending Primes
HumanoidCPU
512
139ms
13 Jun 2025
Christmas Trees
HumanoidCPU
545
137ms
5 Jun 2025
Pernicious Numbers
HumanoidCPU
100
138ms
5 Jun 2025
Leap Years
HumanoidCPU
730
137ms
5 Jun 2025
Catalan’s Constant
HumanoidCPU
1,003
142ms
5 Jun 2025
Kolakoski Constant
HumanoidCPU
1,003
138ms
5 Jun 2025
λ
HumanoidCPU
1,003
142ms
5 Jun 2025
τ
HumanoidCPU
1,003
139ms
5 Jun 2025