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
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
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
Tower of Hanoi
lyphyser
🥈
49
49ms
6 hours ago
PalindromemordnilaP
AdrienHache
💎
56
51ms
12 hours ago
Continued Fractions
lyphyser
79
51ms
14 hours ago
Inventory Sequence
AdrienHache
💎
42
53ms
14 hours ago
Pangram Grep
nipzu
42
49ms
16 hours ago
Tower of Hanoi
CaedenHarper
3,598
49ms
37 hours ago
Tongue-twisters
JOrE20
544
51ms
42 hours ago
Taxicab Numbers
lyphyser
65
112ms
2 days ago
Sierpiński Triangle
JOrE20
575
52ms
2 days ago
Tower of Hanoi
KatieLG
3,600
52ms
3 days ago
Tower of Hanoi
AdrienHache
💎
42
51ms
3 days ago
Tutorial
TheZwierzLF
109
53ms
3 days ago
Tower of Hanoi
JOrE20
3,598
51ms
4 days ago
Tower of Hanoi
dokutan
3,590
51ms
4 days ago
Rijndael S-box
JOrE20
789
69ms
5 days ago
Fizz Buzz
WorseGolfer
25,107
168ms
5 days ago
Taxicab Numbers
HumanoidCPU
4,173
51ms
6 days ago
Fibonacci
Andrey2001
160
51ms
6 days ago
Taxicab Numbers
Shanethegamer
4,181
50ms
7 days ago
Seven Segment
AidanWalter
516
54ms
7 days ago
ISBN
AidanWalter
162
51ms
7 days ago
Tower of Hanoi
MeWhenI
3,592
50ms
9 days ago
Tutorial
JOrE20
55
52ms
10 days ago
Catalan’s Constant
JOrE20
1,024
49ms
10 days ago
Odd Polyomino Tiling
HumanoidCPU
21,444
56ms
13 days ago
Hilbert Curve
JOrE20
5,139
52ms
13 days ago
Kolakoski Constant
lyphyser
🥇
56
4,243ms
16 days ago
Number Spiral
JOrE20
321
52ms
17 days ago
Inventory Sequence
JOrE20
2,644
56ms
17 days ago
Gijswijt’s Sequence
JOrE20
2,021
55ms
17 days ago
λ
JOrE20
1,036
50ms
18 days ago
Fibonacci
KasperKivimaeki
50
48ms
18 days ago
Fibonacci
lyphyser
🥇
35
54ms
19 days ago
ln 2
gigaprofisi
1,024
51ms
19 days ago
Mandelbrot
lyphyser
💎
87
85ms
19 days ago
Trinomial Triangle
JOrE20
2,088
52ms
19 days ago
Collatz
kmathis22
112
51ms
20 days ago
Fizz Buzz
JOrE20
434
49ms
20 days ago
Ellipse Perimeters
lyphyser
68
54ms
21 days ago
Divisors
lyphyser
🥇
43
52ms
22 days ago
Tutorial
Boowie41
123
61ms
23 days ago
ln 2
Adix-null
1,038
50ms
23 days ago
Sphenic Numbers
HumanoidCPU
8,873
57ms
23 days ago
Semiprime Numbers
lyphyser
74
961ms
23 days ago
Binary Lambda Calculus
lyphyser
131
54ms
24 days ago
Polygon Triangulations
lyphyser
110
55ms
24 days ago
Trinomial Triangle
MeWhenI
2,082
50ms
25 days ago
Seven Segment
CaedenHarper
343
55ms
25 days ago
Tower of Hanoi
bitsandbeyond
71
51ms
26 days ago
Binary Lambda Calculus
CatsAreFluffy
252
53ms
26 days ago
Happy Numbers
MeWhenI
119
50ms
26 days ago
Tower of Hanoi
HumanoidCPU
3,590
53ms
26 days ago
Mandelbrot
AdrienHache
🥉
93
76ms
26 days ago
Mandelbrot
CatsAreFluffy
🥈
90
74ms
27 days ago
Van Eck Sequence
JOrE20
2,576
54ms
27 days ago
12 Days of Christmas
gaving-quadprep
536
53ms
27 days ago
99 Bottles of Beer
gaving-quadprep
332
56ms
5 Nov 2025
γ
gigaprofisi
1,024
50ms
4 Nov 2025
Divisors
AdrienHache
🥇
43
55ms
4 Nov 2025
Quine
Babafaba
364
50ms
4 Nov 2025
Gray Code Encoder
AdrienHache
52
55ms
4 Nov 2025
𝑒
JOrE20
1,024
52ms
3 Nov 2025
Tutorial
luuumine
111
65ms
3 Nov 2025
Ellipse Perimeters
CatsAreFluffy
109
52ms
1 Nov 2025
Partition Numbers
CatsAreFluffy
🥈
63
51ms
1 Nov 2025
24 Game
CatsAreFluffy
🥈
196
4,134ms
31 Oct 2025
Cubes
CatsAreFluffy
🥉
210
60ms
31 Oct 2025
Minesweeper
CatsAreFluffy
🥈
91
51ms
31 Oct 2025
Emojify
CatsAreFluffy
162
57ms
31 Oct 2025
Leap Years
CatsAreFluffy
56
50ms
31 Oct 2025
Tower of Hanoi
rucin93
🥉
64
54ms
30 Oct 2025
Tutorial
Openstreetmapler
123
62ms
30 Oct 2025
Tower of Hanoi
CatsAreFluffy
67
56ms
30 Oct 2025
Kolakoski Constant
CatsAreFluffy
🥇
56
279ms
30 Oct 2025
Ascending Primes
CatsAreFluffy
🥉
70
606ms
30 Oct 2025