Recent Solutions
Prev Hole
Play Hole
Next Hole
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
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
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
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
Hole
Golfer
Bytes
Time
Submitted
Odious Numbers
denkyuu1
49
281ms
16 Feb 2026
Odious Numbers
KatieLG
100
162ms
30 Nov 2025
Odious Numbers
Lv0Sys
40
321ms
28 Nov 2025
Odious Numbers
snoozingnewt
41
309ms
27 Nov 2025
Odious Numbers
Babafaba
38
250ms
11 Oct 2025
Odious Numbers
Ripick
40
325ms
24 Jun 2025
Odious Numbers
CaedenHarper
81
149ms
1 Feb 2025
Odious Numbers
sean-niemann
🥇
33
335ms
25 Oct 2024
Odious Numbers
emgordon154
40
209ms
5 Oct 2024
Odious Numbers
alemelis
37
453ms
27 Sep 2024
Odious Numbers
Mabeloid
81
160ms
22 Sep 2024
Odious Numbers
sidok
51
372ms
15 Sep 2024
Odious Numbers
pardouin
37
345ms
5 Sep 2024
Odious Numbers
Steffan153
🥇
33
315ms
6 Aug 2024
Odious Numbers
antimon2
🥇
33
399ms
11 Jul 2024
Odious Numbers
zvnkk
56
380ms
15 Jun 2024
Odious Numbers
HumanoidCPU
81
139ms
18 May 2024
Odious Numbers
ovs-code
34
261ms
12 Mar 2024
Odious Numbers
rollershutter
42
306ms
1 Feb 2024
Odious Numbers
roguh
59
293ms
22 Jan 2024
Odious Numbers
Yewzir
38
331ms
20 Jan 2024
Odious Numbers
davidkoloskiss
87
266ms
17 Jan 2024
Odious Numbers
msbranicky
44
227ms
15 Jan 2024
Odious Numbers
stellartux
41
257ms
26 Dec 2023
Odious Numbers
davbass
43
241ms
21 Aug 2023
Odious Numbers
MeWhenI
37
249ms
5 Aug 2023
Odious Numbers
Andriamanitra
41
242ms
28 Jul 2023
Odious Numbers
dokutan
43
246ms
21 Jul 2023
Odious Numbers
latvianfarmer17
72
221ms
20 Jul 2023
Odious Numbers
janbehrens
40
300ms
11 Jul 2023
Odious Numbers
tidalDisruptionEvent
41
326ms
24 Mar 2023
Odious Numbers
Shanethegamer
34
272ms
22 Mar 2023
Odious Numbers
sisyphus-ppcg
34
259ms
24 Jan 2023
Odious Numbers
retrohun
81
134ms
28 Dec 2022
Odious Numbers
DialFrost
38
329ms
18 Nov 2022
Odious Numbers
Lydxn
🥇
33
313ms
15 Sep 2022
Odious Numbers
Codsilla
41
255ms
1 Jul 2022
Odious Numbers
KatieLG-Transpiler
153
152ms
23 Jun 2022
Odious Numbers
czylabsonasa
38
351ms
20 Jun 2022
Odious Numbers
MarcMush
38
339ms
13 Jan 2022
Odious Numbers
mokymok
106
148ms
10 Nov 2021
Odious Numbers
DeniedPyro
52
374ms
29 Oct 2021
Odious Numbers
theunofficialcoder
81
152ms
2 Aug 2021
Odious Numbers
cure-honey
40
238ms
14 Jun 2021
Odious Numbers
JRaspass
84
158ms
17 Mar 2021
Odious Numbers
JayXon
🥇
33
236ms
8 Mar 2021
Odious Numbers
HPWiz
37
258ms
14 Feb 2021
Odious Numbers
detrumi
41
236ms
25 Oct 2020
Odious Numbers
GolfingSuccess
106
142ms
21 Oct 2020
Odious Numbers
primo-ppcg
36
231ms
10 Oct 2020
Odious Numbers
masflam
79
343ms
19 Aug 2020
Odious Numbers
taigua
88
211ms
19 Aug 2020
Odious Numbers
ETHproductions
36
245ms
16 Aug 2019
Odious Numbers
dloscutoff
50
296ms
23 Nov 2018
Odious Numbers
RustemB
57
240ms
2 Sep 2018