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
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
Multitap Input
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
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
Multitap Input
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
Trinomial Triangle
KatieLG-Transpiler
2,087
2ms
31 hours ago
Tower of Hanoi
KatieLG-Transpiler
4,088
2ms
31 hours ago
Taxicab Numbers
KatieLG-Transpiler
4,645
2ms
31 hours ago
Sphenic Numbers
KatieLG-Transpiler
10,660
2ms
31 hours ago
Semiprime Numbers
KatieLG-Transpiler
15,414
2ms
31 hours ago
Polygon Triangulations
KatieLG-Transpiler
4,508
2ms
31 hours ago
Partition Numbers
KatieLG-Transpiler
747
2ms
31 hours ago
Odd Polyomino Tiling
KatieLG-Transpiler
21,638
2ms
31 hours ago
Mandelbrot
KatieLG-Transpiler
10,045
2ms
31 hours ago
Kaprekar Numbers
KatieLG-Transpiler
508
2ms
31 hours ago
Hilbert Curve
KatieLG-Transpiler
5,150
2ms
31 hours ago
Highly Composite Numbers
KatieLG-Transpiler
453
2ms
31 hours ago
Hexagonal Spiral
KatieLG-Transpiler
1,370
2ms
31 hours ago
Apéry’s Constant
KatieLG-Transpiler
1,004
2ms
31 hours ago
Tower of Hanoi
nwellnhof
🥈
50
530ms
2 days ago
Quine
CornerMercury
65
2ms
3 days ago
Catalan’s Constant
JOrE20
1,003
2ms
3 days ago
Sierpiński Triangle
nwellnhof
🥈
58
3ms
5 days ago
τ
JOrE20
1,003
2ms
5 days ago
Sierpiński Triangle
canissimia
💎
56
4ms
5 days ago
π
JOrE20
1,003
2ms
5 days ago
𝑒
JOrE20
1,003
1ms
10 days ago
Polyominoes
MeWhenI
1,862
5ms
15 days ago
99 Bottles of Beer
MeWhenI
292
8ms
15 days ago
Happy Numbers (Long)
MeWhenI
497
2ms
15 days ago
QR Decoder
MeWhenI
🥉
1,656
347ms
15 days ago
Morse Decoder
MeWhenI
443
3ms
15 days ago
Morse Encoder
MeWhenI
227
3ms
15 days ago
τ
MeWhenI
901
4ms
15 days ago
φ
MeWhenI
887
4ms
15 days ago
𝑒
MeWhenI
893
4ms
15 days ago
Roman to Arabic
MeWhenI
293
46ms
15 days ago
Smith Numbers
MeWhenI
1,498
5ms
15 days ago
Abundant Numbers (Long)
MeWhenI
753
2ms
15 days ago
Medal Tally
canissimia
💎
94
45ms
18 days ago
Sudoku
canissimia
💎
317
1,881ms
18 days ago
Lucky Tickets
MeWhenI
1,072
7ms
19 days ago
Multitap Input
MeWhenI
144
26ms
20 days ago
Multitap Input
stefangimmillaro
200
3ms
20 days ago
Sudoku (Fill-in)
canissimia
💎
162
3,532ms
22 days ago
γ
JOrE20
1,003
2ms
23 days ago
Tongue-twisters
prestosilver
564
2ms
23 days ago
Kolakoski Constant
canissimia
💎
202
4,934ms
9 Dec 2025
Fizz Buzz
JOrE20
512
17ms
8 Dec 2025
Look and Say
olleicua
1,299
2ms
8 Dec 2025
√2
JOrE20
1,003
1ms
6 Dec 2025
φ
JOrE20
1,003
1ms
6 Dec 2025
brainfuck
Natanaelel
🥈
482
624ms
4 Dec 2025
Tower of Hanoi
CaedenHarper
4,087
1ms
1 Dec 2025
Evil Numbers
JOrE20
94
1ms
1 Dec 2025
Kolakoski Constant
JOrE20
1,003
1ms
1 Dec 2025
ln 2
JOrE20
1,003
1ms
1 Dec 2025
Tower of Hanoi
KatieLG
4,087
1ms
30 Nov 2025
Tower of Hanoi
MeWhenI
🥉
51
542ms
29 Nov 2025
Topological Sort
MeWhenI
92
47ms
29 Nov 2025
Tower of Hanoi
dokutan
197
2ms
28 Nov 2025
Taxicab Numbers
HumanoidCPU
4,644
2ms
27 Nov 2025
Look and Say
AidanWalter
305
2ms
26 Nov 2025
Taxicab Numbers
Shanethegamer
4,644
1ms
26 Nov 2025
Look and Say
aksyristos
1,300
1ms
22 Nov 2025
Tongue-twisters
retrohun
352
1ms
22 Nov 2025
Happy Numbers
JOrE20
138
1ms
22 Nov 2025
Look and Say
scpchicken
1,301
1ms
22 Nov 2025
Look and Say
Schmitt-Very-Cool
1,298
2ms
18 Nov 2025
Tutorial
JOrE20
44
3ms
18 Nov 2025
Hilbert Curve
MeWhenI
🥈
540
118ms
17 Nov 2025
Tower of Hanoi
canissimia
💎
49
565ms
17 Nov 2025
Look and Say
JOrE20
1,298
1ms
15 Nov 2025
Arrows
retrohun
370
4ms
15 Nov 2025
λ
JOrE20
1,003
1ms
14 Nov 2025
12 Days of Christmas
stefangimmillaro
610
2ms
14 Nov 2025
Maze
stefangimmillaro
81
456ms
14 Nov 2025
Rule 110
stefangimmillaro
210
114ms
13 Nov 2025
Reversi
stefangimmillaro
124
36ms
12 Nov 2025
Tutorial
Babafaba
77
2ms
12 Nov 2025
Trinomial Triangle
MeWhenI
💎
1,138
10ms
12 Nov 2025
Tower of Hanoi
HumanoidCPU
4,087
1ms
7 Nov 2025
Look and Say
kmathis22
205
2ms
6 Nov 2025
Vampire Numbers
snoozingnewt
1,075
1ms
6 Nov 2025
Smith Numbers
stefangimmillaro
1,529
1ms
6 Nov 2025