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
Gray Code Decoder
Gray Code Encoder
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
Alphabetic Numbers
Apéry’s Constant
Binary Lambda Calculus
Connect Four
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Hexagonal Spiral
Highly Composite Numbers
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
All Languages
><>
ALGOL 68
ArkScript
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
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
ArkScript
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
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
Gray Code Decoder
Gray Code Encoder
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
Alphabetic Numbers
Apéry’s Constant
Binary Lambda Calculus
Connect Four
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Hexagonal Spiral
Highly Composite Numbers
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
Hole
Golfer
Bytes
Time
Submitted
Van Eck Sequence
jusaka
3,598
1,620ms
12 hours ago
Vampire Numbers
jusaka
1,269
1,697ms
12 hours ago
Trinomial Triangle
jusaka
2,128
2,095ms
12 hours ago
Taxicab Numbers
jusaka
4,688
1,542ms
12 hours ago
Smith Numbers
jusaka
2,243
2,182ms
12 hours ago
Rijndael S-box
jusaka
827
1,761ms
12 hours ago
Recamán
jusaka
1,190
1,861ms
12 hours ago
Prime Numbers (Long)
jusaka
7,220
1,749ms
12 hours ago
Polygon Triangulations
jusaka
4,551
1,957ms
12 hours ago
Pascal’s Triangle
jusaka
832
1,922ms
12 hours ago
Partition Numbers
jusaka
790
1,829ms
12 hours ago
Odious Numbers (Long)
jusaka
2,488
1,758ms
12 hours ago
N Queens
jusaka
1,437
1,835ms
12 hours ago
Lucky Numbers
jusaka
5,863
1,868ms
12 hours ago
Look and Say
jusaka
1,342
1,588ms
12 hours ago
Leyland Numbers
jusaka
1,036
1,917ms
12 hours ago
Leap Years
jusaka
919
1,872ms
12 hours ago
Kaprekar Numbers
jusaka
551
1,707ms
12 hours ago
Inventory Sequence
jusaka
3,666
1,555ms
12 hours ago
Highly Composite Numbers
jusaka
496
1,687ms
12 hours ago
Happy Numbers (Long)
jusaka
738
1,629ms
12 hours ago
Gijswijt’s Sequence
jusaka
3,041
1,692ms
12 hours ago
Fizz Buzz
jusaka
556
1,553ms
12 hours ago
Farey Sequence
jusaka
5,170
1,720ms
12 hours ago
Evil Numbers (Long)
jusaka
2,494
1,592ms
12 hours ago
Emirp Numbers (Long)
jusaka
1,439
1,650ms
12 hours ago
Divisors
jusaka
1,309
1,753ms
12 hours ago
Collatz
jusaka
4,269
1,856ms
12 hours ago
12 Days of Christmas
jusaka
2,525
1,706ms
12 hours ago
Catalan Numbers
jusaka
3,015
1,714ms
12 hours ago
Abundant Numbers (Long)
jusaka
1,253
1,970ms
12 hours ago
Ascending Primes
jusaka
653
1,758ms
12 hours ago
Alphabetic Numbers
jusaka
4,939
1,724ms
12 hours ago
𝑒
jusaka
1,047
1,657ms
13 hours ago
φ
jusaka
1,047
1,696ms
13 hours ago
τ
jusaka
1,047
1,930ms
13 hours ago
π
jusaka
1,047
1,886ms
13 hours ago
λ
jusaka
1,047
1,885ms
13 hours ago
γ
jusaka
1,047
1,914ms
13 hours ago
√2
jusaka
1,047
1,573ms
13 hours ago
ln 2
jusaka
1,047
1,641ms
13 hours ago
Kolakoski Sequence
jusaka
2,044
1,686ms
13 hours ago
Kolakoski Constant
jusaka
1,047
1,902ms
13 hours ago
Apéry’s Constant
jusaka
1,047
1,666ms
13 hours ago
Catalan’s Constant
jusaka
1,047
1,410ms
13 hours ago
Prime Numbers
jusaka
139
1,545ms
13 hours ago
Pernicious Numbers
jusaka
178
1,812ms
13 hours ago
Odious Numbers
jusaka
142
1,679ms
13 hours ago
Niven Numbers
jusaka
167
1,721ms
13 hours ago
Happy Numbers
jusaka
182
1,485ms
13 hours ago
Fibonacci
jusaka
208
1,715ms
13 hours ago
Evil Numbers
jusaka
138
1,735ms
13 hours ago
Emirp Numbers
jusaka
215
1,960ms
13 hours ago
Abundant Numbers
jusaka
252
1,501ms
13 hours ago
Ellipse Perimeters
Shanethegamer
316
1,421ms
6 days ago
Farey Sequence
albanian-laundromat
145
1,438ms
6 days ago
Number Spiral
emgordon154
💎
182
1,432ms
10 days ago
Fibonacci
Matter1024
175
1,434ms
10 days ago
Gray Code Decoder
emgordon154
🥈
231
1,484ms
12 days ago
Gray Code Encoder
emgordon154
🥈
199
1,428ms
15 days ago
Gray Code Encoder
GolfingSuccess
🥉
200
1,484ms
16 days ago
Leap Years
Steffan153
🥇
109
1,448ms
17 days ago
Pernicious Numbers
Steffan153
💎
115
1,391ms
20 days ago
Gijswijt’s Sequence
emgordon154
🥇
208
1,411ms
21 days ago
Fizz Buzz
scpchicken
332
1,411ms
21 days ago
Abundant Numbers
Steffan153
💎
119
1,416ms
24 days ago
Pernicious Numbers (Long)
GolfingSuccess
🥉
145
1,432ms
27 days ago
Musical Chords
emgordon154
💎
349
1,452ms
10 Mar 2026
Multitap Input
albanian-laundromat
329
1,442ms
9 Mar 2026
Topological Sort
albanian-laundromat
💎
306
1,908ms
8 Mar 2026
Christmas Trees
DialFrost
💎
149
1,426ms
7 Mar 2026
Kaprekar Numbers
emgordon154
🥉
182
2,388ms
7 Mar 2026
Alphabetic Numbers
HumanoidCPU
3,936
1,418ms
5 Mar 2026
Zeckendorf Representation
albanian-laundromat
261
1,395ms
5 Mar 2026
Tongue-twisters
prestosilver
565
1,438ms
4 Mar 2026
Fibonacci
error256
🥇
101
1,438ms
3 Mar 2026
Evil Numbers
error256
🥈
111
1,405ms
3 Mar 2026
Continued Fractions
albanian-laundromat
🥈
299
1,421ms
3 Mar 2026
Niven Numbers (Long)
Steffan153
🥇
124
1,418ms
3 Mar 2026
Niven Numbers
Steffan153
🥇
108
1,434ms
3 Mar 2026