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
Chars
Time
Submitted
Rule 110
Apfelvater
167
14ms
a min ago
Calendar
mantaslu
126
17ms
11 mins ago
Collatz
Nathan-Masala
89
22ms
12 mins ago
Forsyth–Edwards Notation
jusaka
222
182ms
13 mins ago
Calendar
blaztoma
147
35ms
13 mins ago
Star Wars GPT
LostSyntax21
94
18ms
13 mins ago
Proximity Grid
jusaka
269
183ms
16 mins ago
Set
prestosilver
251
918ms
21 mins ago
Ten-pin Bowling
jusaka
218
155ms
24 mins ago
Gray Code Encoder
madex
🥉
46
5ms
28 mins ago
Catalan Numbers
jusaka
162
136ms
30 mins ago
Alphabetic Numbers
namelessiw
81
179ms
40 mins ago
SI Units
jusaka
🥉
623
261ms
45 mins ago
Fibonacci
Nathan-Masala
52
190ms
46 mins ago
Fibonacci
Nathan-Masala
43
10ms
46 mins ago
QR Decoder
jusaka
🥉
245
148ms
46 mins ago
Fibonacci
Nathan-Masala
62
3ms
49 mins ago
Fibonacci
Nathan-Masala
60
376ms
49 mins ago
Polyominoes
vang1ong7ang
🥉
248
174ms
52 mins ago
Minesweeper
vang1ong7ang
🥈
217
198ms
54 mins ago
Emirp Numbers
vang1ong7ang
107
125ms
56 mins ago
Catalan’s Constant
jusaka
297
149ms
61 mins ago
Lucky Tickets
jusaka
223
238ms
71 mins ago
Fibonacci
Nathan-Masala
45
2ms
80 mins ago
Gray Code Decoder
edsrzf
💎
90
20ms
83 mins ago
Quine
Nathan-Masala
32
10ms
83 mins ago
Ordinal Numbers
edsrzf
🥇
102
9ms
96 mins ago
Divisors
mantaslu
57
11ms
109 mins ago
Ascending Primes
GrayJoKing
💎
119
4,824ms
111 mins ago
Kolakoski Constant
jusaka
🥈
174
160ms
2 hours ago
Leyland Numbers
vang1ong7ang
141
214ms
2 hours ago
Minesweeper
mantaslu
168
29ms
2 hours ago
Fizz Buzz
TommyP92
79
10ms
2 hours ago
Proximity Grid
tomh1012
403
251ms
2 hours ago
ln 2
vang1ong7ang
209
171ms
3 hours ago
Hilbert Curve
vang1ong7ang
🥉
342
159ms
3 hours ago
Ten-pin Bowling
vang1ong7ang
209
169ms
3 hours ago
Lucky Tickets
not-a-pokemon
222
88ms
3 hours ago
Rijndael S-box
vang1ong7ang
191
123ms
3 hours ago
Rule 110
vang1ong7ang
119
190ms
3 hours ago
N Queens
jusaka
179
127ms
3 hours ago
Star Wars GPT
pardouin
94
86ms
4 hours ago
Kaprekar Numbers
pardouin
🥈
101
4,959ms
4 hours ago
Topological Sort
rucin93
🥈
181
33ms
4 hours ago
Vampire Numbers
jusaka
171
1,140ms
5 hours ago
brainfuck
blaztoma
185
22ms
5 hours ago
Cubes
jusaka
259
167ms
5 hours ago
Repeating Decimals
jusaka
🥉
288
238ms
5 hours ago
Gray Code Encoder
JayXon
🥈
66
1,396ms
5 hours ago
Mahjong
jusaka
🥉
315
177ms
5 hours ago
Emirp Numbers (Long)
not-a-pokemon
191
1,974ms
5 hours ago
brainfuck
blaztoma
106
42ms
5 hours ago
Emirp Numbers
not-a-pokemon
192
31ms
5 hours ago
Pernicious Numbers (Long)
HumanoidCPU
41,935
43ms
5 hours ago
Sudoku (Fill-in)
jusaka
343
203ms
5 hours ago
Gray Code Encoder
JayXon
🥇
80
492ms
6 hours ago
Gray Code Encoder
JayXon
💎
75
8ms
6 hours ago
99 Bottles of Beer
jusaka
294
134ms
7 hours ago
Happy Numbers (Long)
jusaka
114
136ms
7 hours ago
Quine
jusaka
11
16ms
7 hours ago
Star Wars GPT
blaztoma
226
98ms
7 hours ago
Catalan Numbers
StefanHabel
48
10ms
7 hours ago
Alphabetic Numbers
CaedenHarper
391
548ms
7 hours ago
Alphabetic Numbers
CaedenHarper
394
18ms
7 hours ago
Billiards
jusaka
252
200ms
7 hours ago
Alphabetic Numbers
CaedenHarper
330
115ms
7 hours ago
99 Bottles of Beer
blaztoma
208
36ms
7 hours ago
Poker
jusaka
430
194ms
7 hours ago
Emirp Numbers (Long)
jusaka
132
141ms
7 hours ago
Kolakoski Sequence
jusaka
107
172ms
7 hours ago
Maze
albanian-laundromat
🥈
167
1,536ms
7 hours ago
12 Days of Christmas
jusaka
513
214ms
8 hours ago
Lucky Tickets
kg583
🥈
112
7ms
8 hours ago
CSS Colors
jusaka
63
379ms
8 hours ago
Gray Code Decoder
canissimia
💎
45
31ms
8 hours ago
Partition Numbers
jusaka
100
145ms
8 hours ago
Diamonds
jusaka
122
141ms
8 hours ago
N Queens
albanian-laundromat
💎
147
197ms
8 hours ago
N Queens
kg583
💎
132
49ms
9 hours ago
Diamonds
lukegustafson
95
11ms
9 hours ago