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
Zodiac Signs
dokutan
642
417ms
5 hours ago
Leyland Numbers
emgordon154
122
419ms
6 hours ago
Trinomial Triangle
KatieLG-Transpiler
2,143
175ms
3 days ago
Tower of Hanoi
KatieLG-Transpiler
4,144
171ms
3 days ago
Taxicab Numbers
KatieLG-Transpiler
4,701
166ms
3 days ago
Sphenic Numbers
KatieLG-Transpiler
10,716
165ms
3 days ago
Semiprime Numbers
KatieLG-Transpiler
15,470
152ms
3 days ago
Polygon Triangulations
KatieLG-Transpiler
4,564
169ms
3 days ago
Partition Numbers
KatieLG-Transpiler
803
162ms
3 days ago
Odd Polyomino Tiling
KatieLG-Transpiler
21,694
165ms
3 days ago
Mandelbrot
KatieLG-Transpiler
10,101
166ms
3 days ago
Kaprekar Numbers
KatieLG-Transpiler
564
153ms
3 days ago
Hilbert Curve
KatieLG-Transpiler
5,206
158ms
3 days ago
Highly Composite Numbers
KatieLG-Transpiler
509
159ms
3 days ago
Hexagonal Spiral
KatieLG-Transpiler
1,426
185ms
3 days ago
Apéry’s Constant
KatieLG-Transpiler
1,060
161ms
3 days ago
Tower of Hanoi
fuzzylojik-golf
87
384ms
3 days ago
ROT13
sean-niemann
🥉
85
455ms
4 days ago
Quine
CornerMercury
85
161ms
5 days ago
Fibonacci
CheeseCake628
80
159ms
5 days ago
Catalan’s Constant
JOrE20
1,082
177ms
5 days ago
Tongue-twisters
sean-niemann
310
432ms
6 days ago
Scrambled Sort
JOrE20
776
239ms
6 days ago
λ
JOrE20
1,064
145ms
7 days ago
τ
JOrE20
1,083
177ms
7 days ago
√2
JOrE20
1,083
156ms
7 days ago
φ
JOrE20
1,042
164ms
7 days ago
π
JOrE20
1,083
169ms
7 days ago
ln 2
JOrE20
1,083
162ms
7 days ago
Prime Numbers (Long)
retrohun
5,989
165ms
11 days ago
24 Game
retrohun
12,464
406ms
11 days ago
Topological Sort
snoozingnewt
209
467ms
12 days ago
Fizz Buzz
JOrE20
90
411ms
13 days ago
Emirp Numbers (Long)
DialFrost
🥈
109
396ms
13 days ago
𝑒
dokutan
748
395ms
15 days ago
√2
dokutan
752
425ms
15 days ago
φ
dokutan
752
422ms
15 days ago
τ
dokutan
752
426ms
15 days ago
π
dokutan
748
401ms
15 days ago
λ
dokutan
752
405ms
15 days ago
γ
dokutan
🥉
752
414ms
15 days ago
Trinomial Triangle
dokutan
1,212
425ms
15 days ago
Tongue-twisters
dokutan
340
428ms
15 days ago
Sierpiński Triangle
dokutan
188
420ms
15 days ago
Rule 110
dokutan
1,276
393ms
15 days ago
Polyominoes
dokutan
🥈
956
412ms
15 days ago
Partition Numbers
dokutan
520
398ms
15 days ago
Number Spiral
dokutan
280
412ms
15 days ago
N Queens
dokutan
724
406ms
15 days ago
Mandelbrot
dokutan
324
409ms
15 days ago
ln 2
dokutan
748
384ms
15 days ago
Leyland Numbers
dokutan
660
410ms
15 days ago
Kolakoski Sequence
dokutan
240
412ms
15 days ago
Kolakoski Constant
dokutan
752
412ms
15 days ago
Kaprekar Numbers
dokutan
368
380ms
15 days ago
Hilbert Curve
dokutan
🥈
464
381ms
15 days ago
Hexagonal Spiral
dokutan
296
424ms
15 days ago
Gijswijt’s Sequence
dokutan
164
423ms
15 days ago
Factorial Factorisation
dokutan
560
408ms
15 days ago
Diamonds
dokutan
168
427ms
15 days ago
Cubes
dokutan
548
412ms
15 days ago
Catalan’s Constant
dokutan
748
403ms
15 days ago
24 Game
dokutan
🥉
4,272
408ms
15 days ago
12 Days of Christmas
dokutan
484
445ms
15 days ago
Hexagonal Spiral
bitsandbeyond
291
169ms
16 days ago
Fibonacci
albanian-laundromat
75
161ms
16 days ago
Arithmetic Numbers
DialFrost
🥇
94
516ms
16 days ago
Collatz
DialFrost
89
394ms
19 days ago
Prime Numbers (Long)
fuzzylojik-golf
72
512ms
19 days ago
Prime Numbers
fuzzylojik-golf
🥉
67
430ms
19 days ago
Roman to Arabic
kmathis22
285
201ms
20 days ago
Tower of Hanoi
JayXon
🥇
81
467ms
21 days ago
Tower of Hanoi
emgordon154
85
547ms
22 days ago
Scrambled Sort
kmathis22
424
574ms
23 days ago
γ
JOrE20
1,083
174ms
25 days ago
Fizz Buzz
mwarvik
116
169ms
26 days ago
Fizz Buzz
amazingalek
116
166ms
26 days ago
Day of Week
snoozingnewt
144
405ms
15 Dec 2025
Leap Years
snoozingnewt
73
378ms
14 Dec 2025
Roman to Arabic
msbranicky
355
237ms
14 Dec 2025