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
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
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
All Languages
><>
ALGOL 68
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
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
><>
ALGOL 68
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
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
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
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
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
Hole
Golfer
Bytes
Time
Submitted
Fizz Buzz
jelycocode
22
463ms
19 hours ago
Prime Numbers (Long)
jshholland
9
1,328ms
10 days ago
Prime Numbers
jshholland
10
572ms
10 days ago
Fractions
jshholland
19
959ms
10 days ago
Card Number Validation
jshholland
35
1,111ms
10 days ago
Abundant Numbers (Long)
jshholland
13
1,229ms
10 days ago
Abundant Numbers
jshholland
14
764ms
10 days ago
12 Days of Christmas
jshholland
441
570ms
10 days ago
Emirp Numbers (Long)
jshholland
26
1,683ms
10 days ago
Emirp Numbers
jshholland
26
983ms
10 days ago
ROT13
jshholland
34
617ms
10 days ago
Look and Say
themoonisacheese
31
445ms
11 days ago
Tutorial
Ultra814
30
732ms
11 days ago
Multitap Input
themoonisacheese
60
844ms
12 days ago
Tutorial
FortuiteMan
80
784ms
26 days ago
Christmas Trees
themoonisacheese
40
478ms
26 Jan 2026
π
Andrey2001
1,005
522ms
25 Jan 2026
Fibonacci
themoonisacheese
18
481ms
22 Jan 2026
Tutorial
Mefred
80
922ms
15 Jan 2026
𝑒
JOrE20
1,005
427ms
5 Jan 2026
Tutorial
HumanoidCPU
12
925ms
1 Jan 2026
Fizz Buzz
JOrE20
415
529ms
27 Dec 2025
ASCII Table
themoonisacheese
64
630ms
19 Dec 2025
Taxicab Numbers
kurkale6ka
4,162
450ms
12 Dec 2025
Sphenic Numbers
themoonisacheese
16
3,275ms
12 Dec 2025
Number Spiral
kurkale6ka
302
410ms
11 Dec 2025
Tutorial
kurkale6ka
28
872ms
10 Dec 2025
Reverse Polish Notation
themoonisacheese
21
628ms
9 Dec 2025
Fibonacci
voytxt
14
464ms
6 Dec 2025
Tower of Hanoi
KatieLG
4,089
446ms
30 Nov 2025
Smith Numbers
themoonisacheese
29
2,960ms
28 Nov 2025
Taxicab Numbers
HumanoidCPU
4,162
460ms
27 Nov 2025
Tutorial
JOrE20
12
984ms
26 Nov 2025
Taxicab Numbers
Shanethegamer
4,162
593ms
26 Nov 2025
Hexdump
themoonisacheese
67
760ms
20 Nov 2025
Kolakoski Sequence
HumanoidCPU
2,002
443ms
12 Nov 2025
Tutorial
TheDevilWillBeBee
30
991ms
7 Nov 2025
Tower of Hanoi
HumanoidCPU
3,579
500ms
6 Nov 2025
Tower of Hanoi
Shanethegamer
4,089
639ms
30 Oct 2025
Inventory Sequence
themoonisacheese
33
889ms
29 Oct 2025
Semiprime Numbers
themoonisacheese
16
3,154ms
27 Oct 2025
Tutorial
Babafaba
80
888ms
15 Oct 2025
Fizz Buzz
snoozingnewt
22
610ms
10 Oct 2025
Collatz
themoonisacheese
37
1,028ms
8 Oct 2025
Trinomial Triangle
themoonisacheese
35
555ms
7 Oct 2025
Pascal’s Triangle
themoonisacheese
36
514ms
7 Oct 2025
Fizz Buzz
LostSyntax21
26
587ms
2 Oct 2025
Tutorial
J09M
28
915ms
23 Sep 2025
Foo Fizz Buzz Bar
themoonisacheese
42
1,876ms
16 Sep 2025
Tutorial
snoozingnewt
12
978ms
15 Sep 2025
Fizz Buzz
madex
22
529ms
3 Sep 2025
Fizz Buzz
CaedenHarper
22
549ms
28 Aug 2025
Tutorial
Vexxter9
80
958ms
21 Aug 2025
Highly Composite Numbers
HumanoidCPU
394
437ms
18 Aug 2025
Hexagonal Spiral
HumanoidCPU
1,137
442ms
18 Aug 2025
Tutorial
dokutan
13
870ms
18 Aug 2025
Hilbert Curve
HumanoidCPU
5,120
479ms
18 Aug 2025
Abundant Numbers (Long)
HumanoidCPU
966
463ms
18 Aug 2025
Polyominoes
HumanoidCPU
3,566
481ms
18 Aug 2025
Recamán
HumanoidCPU
899
468ms
18 Aug 2025
Kaprekar Numbers
HumanoidCPU
442
451ms
18 Aug 2025
Happy Numbers
HumanoidCPU
109
464ms
18 Aug 2025
Happy Numbers (Long)
HumanoidCPU
554
458ms
18 Aug 2025
Emirp Numbers (Long)
HumanoidCPU
1,158
500ms
18 Aug 2025
Catalan Numbers
HumanoidCPU
2,874
482ms
18 Aug 2025
Tongue-twisters
HumanoidCPU
525
503ms
18 Aug 2025
Van Eck Sequence
HumanoidCPU
2,557
484ms
17 Aug 2025
Abundant Numbers
HumanoidCPU
165
469ms
16 Aug 2025
Foo Fizz Buzz Bar
dokutan
92
699ms
15 Aug 2025
Leap Years
dokutan
32
587ms
15 Aug 2025
Fizz Buzz
dokutan
60
588ms
15 Aug 2025
Look and Say
HumanoidCPU
1,281
506ms
15 Aug 2025
Farey Sequence
HumanoidCPU
4,356
499ms
15 Aug 2025
Diamonds
HumanoidCPU
1,105
455ms
14 Aug 2025
Niven Numbers
HumanoidCPU
93
443ms
14 Aug 2025
Lucky Numbers
HumanoidCPU
4,822
518ms
14 Aug 2025
Inventory Sequence
HumanoidCPU
2,625
481ms
14 Aug 2025
Gijswijt’s Sequence
HumanoidCPU
2,002
475ms
14 Aug 2025
Smith Numbers
HumanoidCPU
1,826
461ms
14 Aug 2025
Vampire Numbers
HumanoidCPU
1,073
468ms
14 Aug 2025