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)
Taxicab Numbers
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
Huffman Encoder
NFA Simulator
Nim
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic 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)
Taxicab Numbers
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
Huffman Encoder
NFA Simulator
Nim
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Turtle
Tutorial
Hole
Golfer
Bytes
Time
Submitted
Taxicab Numbers
dokutan
🥈
3,375
80ms
4 hours ago
Scrambled Sort
Matter1024
631
31ms
29 hours ago
Leap Years
Lydxn
🥇
60
29ms
30 hours ago
ROT13
snoozingnewt
171
29ms
37 hours ago
Odious Numbers (Long)
snoozingnewt
🥇
67
30ms
2 days ago
Odious Numbers
snoozingnewt
66
29ms
2 days ago
Evil Numbers (Long)
snoozingnewt
🥇
65
32ms
2 days ago
Evil Numbers
snoozingnewt
🥇
64
28ms
2 days ago
Semiprime Numbers
albanian-laundromat
162
154ms
3 days ago
Fibonacci
Matter1024
79
29ms
4 days ago
Taxicab Numbers
edsrzf
💎
122
207ms
5 days ago
Kolakoski Constant
albanian-laundromat
🥈
220
42ms
6 days ago
24 Game
madeforlosers
17,894
29ms
6 days ago
United States
GolfingSuccess
780
30ms
7 days ago
Nim
albanian-laundromat
212
31ms
7 days ago
Taxicab Numbers
CaedenHarper
🥉
5,630
28ms
9 days ago
Kolakoski Sequence
madeforlosers
2,018
29ms
14 days ago
Dragon Curve
HumanoidCPU
11,561
43ms
14 days ago
Evil Numbers
madeforlosers
184
30ms
15 days ago
Card Number Validation
albanian-laundromat
159
32ms
15 days ago
Cubes
madeforlosers
4,559
28ms
15 days ago
Odious Numbers
madeforlosers
191
28ms
15 days ago
Evil Numbers (Long)
madeforlosers
3,968
29ms
15 days ago
Farey Sequence
madeforlosers
7,468
29ms
15 days ago
Odious Numbers (Long)
madeforlosers
3,959
29ms
15 days ago
Abundant Numbers
madeforlosers
361
28ms
15 days ago
Abundant Numbers (Long)
madeforlosers
1,962
29ms
15 days ago
Prime Numbers
madeforlosers
185
28ms
15 days ago
Look and Say
madeforlosers
1,373
29ms
15 days ago
Prime Numbers (Long)
madeforlosers
10,878
29ms
15 days ago
Niven Numbers (Long)
madeforlosers
13,604
28ms
15 days ago
Fizz Buzz
madeforlosers
827
29ms
15 days ago
QR Decoder
MostParsingVex
🥈
416
30ms
18 days ago
Tower of Hanoi
scpchicken
99
29ms
18 days ago
Leap Years
JayXon
🥇
60
29ms
19 days ago
Sphenic Numbers
albanian-laundromat
164
224ms
22 days ago
Niven Numbers
madeforlosers
83
28ms
25 days ago
Factorial Factorisation
retrohun
880
28ms
26 days ago
Fibonacci
solisolu
76
29ms
8 Apr 2026
Pernicious Numbers (Long)
HumanoidCPU
41,935
43ms
7 Apr 2026
Gray Code Encoder
emplv
216
65ms
5 Apr 2026
Gray Code Decoder
albanian-laundromat
🥈
107
85ms
3 Apr 2026
Gray Code Decoder
emgordon154
🥉
113
96ms
1 Apr 2026
Card Number Validation
edsrzf
💎
143
29ms
1 Apr 2026
Pascal’s Triangle
Carlos-EAC
996
29ms
1 Apr 2026
N Queens
edsrzf
💎
178
28ms
1 Apr 2026
Gray Code Encoder
edsrzf
💎
104
31ms
1 Apr 2026
Gray Code Decoder
edsrzf
💎
106
37ms
1 Apr 2026
Mandelbrot
emgordon154
🥉
212
39ms
30 Mar 2026
PalindromemordnilaP
MostParsingVex
🥉
156
65ms
30 Mar 2026
Pernicious Numbers
madex
148
25ms
29 Mar 2026
United States
emgordon154
1,262
29ms
29 Mar 2026
Niven Numbers (Long)
emgordon154
123
27ms
29 Mar 2026
Maze
emgordon154
🥉
234
27ms
29 Mar 2026
Tower of Hanoi
emgordon154
92
26ms
29 Mar 2026
Abundant Numbers (Long)
emgordon154
113
29ms
29 Mar 2026
Collatz
emgordon154
🥉
124
27ms
29 Mar 2026
ASCII Table
emgordon154
203
27ms
29 Mar 2026
Foo Fizz Buzz Bar
emgordon154
188
27ms
29 Mar 2026
Kolakoski Sequence
emgordon154
115
27ms
29 Mar 2026
Pascal’s Triangle
emgordon154
124
26ms
29 Mar 2026
Prime Numbers
emgordon154
🥈
76
26ms
29 Mar 2026
Prime Numbers (Long)
emgordon154
104
77ms
29 Mar 2026
Arithmetic Numbers
emgordon154
140
207ms
29 Mar 2026
Rijndael S-box
emgordon154
🥈
139
26ms
29 Mar 2026
Fizz Buzz
emgordon154
132
27ms
29 Mar 2026
Divisors
emgordon154
100
27ms
29 Mar 2026
Abundant Numbers
emgordon154
101
26ms
29 Mar 2026
Farey Sequence
emgordon154
115
26ms
29 Mar 2026
Roman to Arabic
emgordon154
82
68ms
28 Mar 2026
Arabic to Roman
emgordon154
96
89ms
28 Mar 2026
Gijswijt’s Sequence
emgordon154
🥈
145
26ms
28 Mar 2026
Niven Numbers
emgordon154
🥇
76
27ms
28 Mar 2026
Pernicious Numbers (Long)
emgordon154
82
25ms
27 Mar 2026
Evil Numbers
emgordon154
71
26ms
27 Mar 2026
Evil Numbers (Long)
emgordon154
73
25ms
27 Mar 2026
Odious Numbers (Long)
emgordon154
70
27ms
27 Mar 2026
Odious Numbers
emgordon154
69
26ms
27 Mar 2026
Quine
emgordon154
118
25ms
27 Mar 2026
Pernicious Numbers
emgordon154
72
25ms
27 Mar 2026
Fibonacci
emgordon154
75
26ms
27 Mar 2026
Pascal’s Triangle
fuzzylojik-golf
119
26ms
26 Mar 2026
Gray Code Encoder
emgordon154
🥈
109
84ms
26 Mar 2026
Foo Fizz Buzz Bar
albanian-laundromat
193
82ms
23 Mar 2026
Leap Years
Steffan153
🥉
71
25ms
23 Mar 2026
Abundant Numbers
Steffan153
🥇
91
26ms
22 Mar 2026
Abundant Numbers
sean-niemann
🥇
91
27ms
22 Mar 2026
Gray Code Encoder
albanian-laundromat
🥉
150
28ms
22 Mar 2026
Pascal’s Triangle
madex
131
26ms
20 Mar 2026
Pascal’s Triangle
roelderickx
116
26ms
20 Mar 2026
Fibonacci
madeforlosers
81
26ms
17 Mar 2026
Collatz
madeforlosers
143
26ms
17 Mar 2026
ASCII Table
albanian-laundromat
204
27ms
17 Mar 2026
Reversi
albanian-laundromat
💎
211
28ms
17 Mar 2026
Tongue-twisters
RealAMC
579
25ms
17 Mar 2026
Catalan’s Constant
RealAMC
1,022
26ms
17 Mar 2026
Collatz
albanian-laundromat
126
27ms
16 Mar 2026
Odious Numbers
fuzzylojik-golf
🥇
65
28ms
16 Mar 2026
United States
madex
730
27ms
15 Mar 2026
Pernicious Numbers
GolfingSuccess
🥇
68
26ms
13 Mar 2026