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
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
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
Tutorial
FortuiteMan
76
132ms
15 hours ago
π
plcc0
33
142ms
3 days ago
Scrambled Sort
plcc0
20
107ms
3 days ago
12 Days of Christmas
plcc0
383
114ms
3 days ago
99 Bottles of Beer
plcc0
179
111ms
3 days ago
Partition Numbers
plcc0
41
97ms
3 days ago
Niven Numbers
plcc0
18
93ms
3 days ago
Lucky Numbers
plcc0
30
110ms
3 days ago
Fizz Buzz
plcc0
35
93ms
3 days ago
Divisors
plcc0
22
101ms
3 days ago
Diamonds
plcc0
33
105ms
3 days ago
Collatz
plcc0
30
121ms
3 days ago
Sphenic Numbers
plcc0
17
113ms
3 days ago
Semiprime Numbers
plcc0
13
110ms
3 days ago
ASCII Table
plcc0
60
87ms
3 days ago
Card Number Validation
plcc0
30
97ms
3 days ago
Leap Years
plcc0
25
95ms
3 days ago
Evil Numbers
plcc0
12
84ms
3 days ago
Quine
plcc0
8
92ms
3 days ago
Pangram Grep
plcc0
18
100ms
3 days ago
π
Andrey2001
1,004
129ms
9 days ago
Tutorial
Mefred
76
133ms
11 days ago
𝑒
JOrE20
1,004
123ms
5 Jan 2026
Tutorial
HumanoidCPU
23
165ms
1 Jan 2026
Tutorial
kurkale6ka
26
134ms
11 Dec 2025
Pernicious Numbers
snoozingnewt
15
92ms
8 Dec 2025
ASCII Table
HumanoidCPU
274
99ms
7 Dec 2025
Evil Numbers (Long)
aditsu
14
104ms
30 Nov 2025
Evil Numbers
aditsu
12
100ms
30 Nov 2025
Odious Numbers (Long)
aditsu
12
110ms
30 Nov 2025
Odious Numbers
aditsu
11
99ms
30 Nov 2025
Tower of Hanoi
KatieLG
3,578
105ms
30 Nov 2025
Taxicab Numbers
HumanoidCPU
4,161
112ms
27 Nov 2025
Taxicab Numbers
Shanethegamer
4,161
146ms
26 Nov 2025
Smooth Numbers
GolfingSuccess
28
420ms
24 Nov 2025
Diamonds
aditsu
45
115ms
23 Nov 2025
ASCII Table
aditsu
56
119ms
23 Nov 2025
Continued Fractions
GolfingSuccess
47
160ms
21 Nov 2025
Kolakoski Sequence
HumanoidCPU
2,001
151ms
12 Nov 2025
Tower of Hanoi
HumanoidCPU
3,578
109ms
6 Nov 2025
Tower of Hanoi
GolfingSuccess
28
117ms
30 Oct 2025
Tower of Hanoi
Shanethegamer
3,578
113ms
30 Oct 2025
Look and Say
plcc0
12
103ms
25 Oct 2025
Prime Numbers
plcc0
9
104ms
24 Oct 2025
Prime Numbers (Long)
plcc0
10
116ms
24 Oct 2025
Ellipse Perimeters
Shanethegamer
35
90ms
20 Oct 2025
Tutorial
Babafaba
76
145ms
15 Oct 2025
Prime Numbers (Long)
snoozingnewt
10
111ms
9 Oct 2025
Prime Numbers
snoozingnewt
9
101ms
9 Oct 2025
Reverse Polish Notation
BREMAUCY
6
98ms
5 Oct 2025
Mandelbrot
aditsu
67
1,137ms
21 Sep 2025
Set
aditsu
28
173ms
21 Sep 2025
Tutorial
snoozingnewt
23
125ms
15 Sep 2025
Fizz Buzz
snoozingnewt
35
105ms
14 Sep 2025
Fizz Buzz
CaedenHarper
35
108ms
28 Aug 2025
Tutorial
Vexxter9
82
132ms
21 Aug 2025
Quine
aditsu
8
107ms
20 Aug 2025
Hexagonal Spiral
HumanoidCPU
1,136
107ms
18 Aug 2025
Highly Composite Numbers
HumanoidCPU
393
105ms
18 Aug 2025
Hilbert Curve
HumanoidCPU
5,119
111ms
18 Aug 2025
Abundant Numbers (Long)
HumanoidCPU
965
108ms
18 Aug 2025
Polyominoes
HumanoidCPU
3,565
119ms
18 Aug 2025
Recamán
HumanoidCPU
898
106ms
18 Aug 2025
Rule 110
HumanoidCPU
15,853
129ms
18 Aug 2025
Kaprekar Numbers
HumanoidCPU
441
100ms
18 Aug 2025
Happy Numbers
HumanoidCPU
108
97ms
18 Aug 2025
Happy Numbers (Long)
HumanoidCPU
553
102ms
18 Aug 2025
Emirp Numbers (Long)
HumanoidCPU
1,157
102ms
18 Aug 2025
Catalan Numbers
HumanoidCPU
2,873
105ms
18 Aug 2025
Tongue-twisters
HumanoidCPU
524
107ms
18 Aug 2025
Van Eck Sequence
HumanoidCPU
2,556
111ms
17 Aug 2025
Abundant Numbers
HumanoidCPU
164
102ms
16 Aug 2025
Look and Say
HumanoidCPU
1,280
108ms
15 Aug 2025
Farey Sequence
HumanoidCPU
4,355
118ms
15 Aug 2025
Diamonds
HumanoidCPU
1,104
110ms
14 Aug 2025
Niven Numbers
HumanoidCPU
92
109ms
14 Aug 2025
Lucky Numbers
HumanoidCPU
4,821
111ms
14 Aug 2025
Inventory Sequence
HumanoidCPU
2,624
107ms
14 Aug 2025
Gijswijt’s Sequence
HumanoidCPU
2,001
116ms
14 Aug 2025
Smith Numbers
HumanoidCPU
1,825
115ms
14 Aug 2025