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
Abundant Numbers (Long)
Steffan153
43
100ms
5 hours ago
Mahjong
sultan
670
3,545ms
14 hours ago
24 Game
ovs-code
💎
188
1,951ms
22 hours ago
Mahjong
madex
🥈
260
119ms
26 hours ago
Tutorial
targrik
68
85ms
29 hours ago
Mahjong
Matter1024
504
970ms
29 hours ago
Divisors
RealBen9
80
85ms
30 hours ago
Leap Years
RealBen9
46
78ms
31 hours ago
Niven Numbers
madeforlosers
48
80ms
31 hours ago
Mahjong
FortuiteMan
🥉
290
124ms
32 hours ago
ASCII Table
flekAI
233
164ms
44 hours ago
Tower of Hanoi
flekAI
88
93ms
44 hours ago
ROT13
flekAI
96
72ms
45 hours ago
Trinomial Triangle
flekAI
170
85ms
45 hours ago
Farey Sequence
flekAI
168
88ms
45 hours ago
Arabic to Roman
flekAI
302
109ms
45 hours ago
Pangram Grep
flekAI
162
89ms
45 hours ago
Gray Code Encoder
flekAI
234
116ms
45 hours ago
99 Bottles of Beer
flekAI
451
90ms
47 hours ago
Gray Code Decoder
flekAI
148
112ms
47 hours ago
PalindromemordnilaP
flekAI
280
94ms
47 hours ago
Rule 110
flekAI
275
104ms
47 hours ago
Partition Numbers
flekAI
108
88ms
47 hours ago
Christmas Trees
flekAI
113
79ms
47 hours ago
Ascending Primes
flekAI
299
159ms
47 hours ago
Kolakoski Sequence
flekAI
123
79ms
47 hours ago
Roman to Arabic
flekAI
246
113ms
2 days ago
Sphenic Numbers
flekAI
189
209ms
2 days ago
Inventory Sequence
flekAI
93
89ms
2 days ago
Foo Fizz Buzz Bar
flekAI
163
96ms
2 days ago
Lucky Numbers
flekAI
114
86ms
2 days ago
Arithmetic Numbers
flekAI
81
542ms
2 days ago
Semiprime Numbers
flekAI
132
183ms
2 days ago
Smith Numbers
flekAI
185
162ms
2 days ago
Happy Numbers
flekAI
121
85ms
2 days ago
Emirp Numbers (Long)
flekAI
203
174ms
2 days ago
Emirp Numbers
flekAI
202
98ms
2 days ago
Pernicious Numbers (Long)
flekAI
98
114ms
2 days ago
Pernicious Numbers
flekAI
71
81ms
2 days ago
Recamán
flekAI
85
78ms
2 days ago
Prime Numbers (Long)
flekAI
87
93ms
2 days ago
Abundant Numbers (Long)
flekAI
81
127ms
2 days ago
Niven Numbers (Long)
flekAI
94
108ms
2 days ago
Odious Numbers (Long)
flekAI
77
96ms
2 days ago
Evil Numbers (Long)
flekAI
77
83ms
2 days ago
Abundant Numbers
flekAI
80
85ms
2 days ago
Odious Numbers
flekAI
75
79ms
2 days ago
Pascal’s Triangle
flekAI
47
72ms
2 days ago
Van Eck Sequence
flekAI
109
89ms
2 days ago
Happy Numbers (Long)
flekAI
101
86ms
2 days ago
Divisors
flekAI
45
81ms
2 days ago
Leap Years
flekAI
59
78ms
2 days ago
Fibonacci
flekAI
48
78ms
2 days ago
Prime Numbers
flekAI
68
74ms
2 days ago
Niven Numbers
flekAI
92
78ms
2 days ago
Collatz
flekAI
80
216ms
2 days ago
Evil Numbers
flekAI
64
77ms
2 days ago
Fizz Buzz
flekAI
99
78ms
2 days ago
Smith Numbers
msbranicky
212
3,101ms
2 days ago
Ascending Primes
msbranicky
238
4,035ms
2 days ago
Prime Numbers
snoozingnewt
33
67ms
2 days ago
Factorial Factorisation
retrohun
872
68ms
3 days ago
Tower of Hanoi
scpchicken
71
77ms
3 days ago
Arabic to Roman
scpchicken
🥇
40
105ms
3 days ago
Van Eck Sequence
jusaka
2,565
126ms
5 days ago
Vampire Numbers
jusaka
1,081
113ms
5 days ago
Trinomial Triangle
jusaka
2,076
117ms
5 days ago
Taxicab Numbers
jusaka
4,170
136ms
5 days ago
Smith Numbers
jusaka
1,834
106ms
5 days ago
Rijndael S-box
jusaka
778
79ms
5 days ago
Recamán
jusaka
907
122ms
5 days ago
Prime Numbers (Long)
jusaka
5,958
152ms
5 days ago
Polygon Triangulations
jusaka
4,322
103ms
5 days ago
Pascal’s Triangle
jusaka
779
92ms
5 days ago
Partition Numbers
jusaka
657
113ms
5 days ago
Odious Numbers (Long)
jusaka
1,955
93ms
5 days ago
N Queens
jusaka
1,256
96ms
5 days ago
Lucky Numbers
jusaka
4,830
117ms
5 days ago
Look and Say
jusaka
1,289
92ms
5 days ago
Leyland Numbers
jusaka
896
90ms
5 days ago