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
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
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
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
><>
ALGOL 68
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
ArkScript
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
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
ArkScript
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
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
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
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
Foo Fizz Buzz Bar
zgialor-lab
107
12ms
14 mins ago
Ascending Primes
karadigm01
135
10ms
60 mins ago
ISBN
JayXon
🥇
91
17ms
63 mins ago
Pernicious Numbers (Long)
zgialor-lab
78
24ms
3 hours ago
π
zgialor-lab
1,011
10ms
3 hours ago
Van Eck Sequence
zgialor-lab
79
16ms
3 hours ago
Continued Fractions
zgialor-lab
177
14ms
3 hours ago
Crossword
5cw
642
2,549ms
3 hours ago
Jacobi Symbol
FortuiteMan
139
11ms
4 hours ago
Fractions
solisolu
110
10ms
4 hours ago
Medal Tally
JayXon
🥇
129
31ms
4 hours ago
Partition Numbers
davecame
79
19ms
4 hours ago
Continued Fractions
andrewjc2000
135
11ms
4 hours ago
Ordinal Numbers
Flekay
94
12ms
6 hours ago
Emirp Numbers (Long)
Flekay
104
153ms
6 hours ago
Zodiac Signs
aksyristos
390
13ms
6 hours ago
Polyominoes
aksyristos
566
14ms
7 hours ago
Arrows
aksyristos
266
18ms
8 hours ago
Gijswijt’s Sequence
ahmetdemirag
138
787ms
8 hours ago
Ten-pin Bowling
aksyristos
400
14ms
8 hours ago
Maze
aksyristos
491
13ms
9 hours ago
Ten-pin Bowling
blaztoma
176
40ms
9 hours ago
Card Number Validation
aksyristos
155
10ms
10 hours ago
Morse Decoder
aksyristos
342
10ms
10 hours ago
Kolakoski Sequence
Seek64
56
23ms
11 hours ago
Continued Fractions
Matter1024
127
10ms
11 hours ago
Continued Fractions
moustave
137
13ms
12 hours ago
Trinomial Triangle
firegene
70
14ms
12 hours ago
Pascal’s Triangle
firegene
57
11ms
13 hours ago
Rule 110
firegene
108
11ms
13 hours ago
Continued Fractions
denkyuu1
171
18ms
15 hours ago
Emirp Numbers (Long)
blaztoma
85
184ms
15 hours ago
Mahjong
Seek64
217
44ms
16 hours ago
Diamonds
dokutan
95
17ms
16 hours ago
Gray Code Encoder
lukegustafson
62
15ms
18 hours ago
Christmas Trees
denkyuu1
81
10ms
19 hours ago
Gray Code Decoder
lukegustafson
74
190ms
19 hours ago
Diamonds
snoozingnewt
87
16ms
20 hours ago
Proximity Grid
firegene
209
43ms
22 hours ago
Divisors
yujh-yujh
🥇
57
11ms
23 hours ago
Polyominoes
StefanHabel
339
25ms
24 hours ago
Pascal’s Triangle
Aquateraneal
77
11ms
25 hours ago
Rule 110
StefanHabel
121
11ms
25 hours ago
Jacobi Symbol
Aquateraneal
181
13ms
25 hours ago
QR Decoder
StefanHabel
207
11ms
25 hours ago
Arithmetic Numbers
Aquateraneal
115
1,829ms
26 hours ago
Multitap Input
StefanHabel
159
18ms
26 hours ago
Collatz
Aquateraneal
86
17ms
26 hours ago
Van Eck Sequence
Aquateraneal
84
16ms
26 hours ago
Smith Numbers
StefanHabel
133
2,094ms
26 hours ago
Catalan’s Constant
CornerMercury
88
11ms
27 hours ago
Intersection
Steffan153
112
21ms
28 hours ago
Spelling Numbers
StefanHabel
346
21ms
29 hours ago
ISBN
Emutis
103
10ms
29 hours ago
brainfuck
rucin93
199
21ms
29 hours ago
Zodiac Signs
StefanHabel
171
13ms
29 hours ago
Fizz Buzz
davidludwik2370
61
10ms
29 hours ago
Tic-tac-toe
Steffan153
100
20ms
30 hours ago
Foo Fizz Buzz Bar
Aquateraneal
94
11ms
31 hours ago
Niven Numbers (Long)
Aquateraneal
57
15ms
31 hours ago
Niven Numbers
Aquateraneal
55
10ms
31 hours ago
Abundant Numbers
Aquateraneal
86
11ms
31 hours ago
Abundant Numbers (Long)
Aquateraneal
87
32ms
31 hours ago
Prime Numbers (Long)
Aquateraneal
66
148ms
31 hours ago
Prime Numbers
Aquateraneal
64
10ms
31 hours ago
Card Number Validation
Aquateraneal
137
17ms
31 hours ago
brainfuck
blaztoma
187
21ms
33 hours ago
Polyominoes
ahmetdemirag
282
23ms
33 hours ago
United States
davidludwik2370
310
10ms
34 hours ago
Gray Code Decoder
KasperKivimaeki
81
1,145ms
34 hours ago
Calendar
solisolu
259
14ms
35 hours ago
Vampire Numbers
solisolu
118
626ms
35 hours ago
12 Days of Christmas
davidludwik2370
544
10ms
35 hours ago
Repeating Decimals
solisolu
206
10ms
36 hours ago
ISBN
blaztoma
101
10ms
36 hours ago
Vampire Numbers
edsrzf
121
555ms
38 hours ago
Number Spiral
solisolu
120
10ms
39 hours ago
Intersection
JayXon
🥇
108
20ms
40 hours ago
12 Days of Christmas
FoxInTheClouds
418
11ms
41 hours ago
brainfuck
JayXon
💎
166
20ms
41 hours ago