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
Dragon Curve
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
Dragon Curve
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
Multitap Input
lynn
🥉
141
150ms
2 mins ago
99 Bottles of Beer
cuvam
265
11ms
12 mins ago
Pangram Grep
lynn
🥈
91
1,373ms
12 mins ago
Fibonacci
FortuiteMan
85
236ms
13 mins ago
Farey Sequence
FortuiteMan
130
239ms
22 mins ago
Star Wars Opening Crawl
albanian-laundromat
🥈
290
976ms
22 mins ago
Mahjong
blaztoma
🥈
185
45ms
30 mins ago
Mahjong
rucin93
💎
214
13ms
33 mins ago
Happy Numbers
BrunoVisnadi
77
44ms
40 mins ago
Happy Numbers (Long)
BrunoVisnadi
78
182ms
41 mins ago
Taxicab Numbers
stefangimmillaro
101
2,747ms
46 mins ago
Catalan Numbers
Steffan153
157
3ms
47 mins ago
Mahjong
blaztoma
231
46ms
54 mins ago
Calendar
cuvam
201
15ms
56 mins ago
Rijndael S-box
vang1ong7ang
🥉
137
136ms
60 mins ago
Pascal’s Triangle
cuvam
61
10ms
61 mins ago
Reverse Polish Notation
Mukundan314
🥈
42
22ms
72 mins ago
Catalan Numbers
Steffan153
🥈
163
3ms
80 mins ago
Reversi
vang1ong7ang
147
26ms
86 mins ago
Catalan Numbers
Steffan153
💎
153
6ms
98 mins ago
Dragon Curve
lyphyser
107
56ms
99 mins ago
Mahjong
vang1ong7ang
280
18ms
100 mins ago
Catalan Numbers
vang1ong7ang
148
135ms
113 mins ago
Catalan’s Constant
vang1ong7ang
🥉
242
163ms
114 mins ago
Catalan Numbers
Steffan153
💎
209
29ms
114 mins ago
Reverse Polish Notation
kg583
194
83ms
119 mins ago
DFA Simulator
Mikey-Beep
253
12ms
2 hours ago
Spelling Numbers
vang1ong7ang
484
166ms
2 hours ago
ln 2
vang1ong7ang
183
160ms
2 hours ago
Maze
Mukundan314
💎
88
3,078ms
2 hours ago
Pernicious Numbers
firegene
27
34ms
2 hours ago
Factorial Factorisation
FortuiteMan
204
253ms
2 hours ago
Flags
bitsandbeyond
680
162ms
2 hours ago
Evil Numbers (Long)
FortuiteMan
116
266ms
2 hours ago
Evil Numbers
FortuiteMan
115
238ms
2 hours ago
Ascending Primes
vang1ong7ang
112
258ms
2 hours ago
N Queens
vang1ong7ang
🥉
162
142ms
2 hours ago
Tower of Hanoi
Steffan153
🥇
80
4ms
2 hours ago
λ
vang1ong7ang
🥉
423
426ms
2 hours ago
Poker
vang1ong7ang
🥉
402
174ms
2 hours ago
Ten-pin Bowling
vang1ong7ang
207
167ms
2 hours ago
Forsyth–Edwards Notation
vang1ong7ang
232
181ms
2 hours ago
Recamán
tungstengmd
92
360ms
2 hours ago
Emirp Numbers (Long)
FortuiteMan
203
265ms
3 hours ago
Musical Chords
vang1ong7ang
258
197ms
3 hours ago
Emirp Numbers
FortuiteMan
202
252ms
3 hours ago
Niven Numbers
denkyuu1
40
353ms
3 hours ago
Divisors
FortuiteMan
113
265ms
3 hours ago
Diamonds
FortuiteMan
202
266ms
3 hours ago
brainfuck
vang1ong7ang
284
156ms
3 hours ago
γ
vang1ong7ang
💎
331
4,372ms
3 hours ago
Prime Numbers (Long)
denkyuu1
24
97ms
3 hours ago
Dragon Curve
LostSyntax21
266
23ms
3 hours ago
Prime Numbers (Long)
denkyuu1
34
46ms
3 hours ago
Emojify
vang1ong7ang
208
157ms
3 hours ago
Happy Numbers (Long)
denkyuu1
55
406ms
3 hours ago
99 Bottles of Beer
jumpingtj
52,657
11ms
3 hours ago
Rock-paper-scissors-Spock-lizard
vang1ong7ang
304
202ms
3 hours ago
99 Bottles of Beer
jumpingtj
403
10ms
3 hours ago
Trinomial Triangle
Natanaelel
🥉
37
34ms
3 hours ago
Hexdump
denkyuu1
125
37ms
3 hours ago
Billiards
vang1ong7ang
249
262ms
3 hours ago
Hexagonal Spiral
bitsandbeyond
213
120ms
3 hours ago
Spelling Numbers
vang1ong7ang
338
14ms
3 hours ago
Hexagonal Spiral
bitsandbeyond
213
152ms
3 hours ago
Emirp Numbers (Long)
vang1ong7ang
127
156ms
4 hours ago
Hexagonal Spiral
bitsandbeyond
198
5ms
4 hours ago
Dragon Curve
scpchicken
360
12ms
4 hours ago
Calendar
solisolu
107
32ms
4 hours ago
Maze
vang1ong7ang
235
163ms
4 hours ago
Day of Week
vang1ong7ang
242
250ms
4 hours ago
Hilbert Curve
vang1ong7ang
🥉
343
175ms
4 hours ago
Tutorial
historicattle
149
3ms
4 hours ago
Collatz
historicattle
114
3ms
4 hours ago
Pernicious Numbers (Long)
Herbert00709
60
4ms
4 hours ago
Fizz Buzz
historicattle
185
1,438ms
4 hours ago
𝑒
kumavale
🥇
114
151ms
5 hours ago
Pernicious Numbers (Long)
denkyuu1
59
44ms
5 hours ago
Star Wars Opening Crawl
rucin93
🥈
204
11ms
5 hours ago
Taxicab Numbers
anter69
112
48ms
6 hours ago