Recent Solutions
Prev Hole
Play Hole
Next Hole
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
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
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
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
Transpose Sentence
Trinomial Triangle
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Apéry’s Constant
Binary Lambda Calculus
Calendar
Connect Four
Continued Fractions
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
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Tower of Hanoi
Turtle
Tutorial
All Languages
><>
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Common Lisp
Crystal
D
Dart
Elixir
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
ALGOL 68
APL
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Erlang
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Luau
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
Umka
Vala
Vyxal
Bytes
Chars
Scoring
Bytes
Chars
Language
All
><>
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Common Lisp
Crystal
D
Dart
Elixir
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
ALGOL 68
APL
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Erlang
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
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
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
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
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
Transpose Sentence
Trinomial Triangle
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Experimental Hole
Apéry’s Constant
Binary Lambda Calculus
Calendar
Connect Four
Continued Fractions
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
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Tower of Hanoi
Turtle
Tutorial
Hole
Golfer
Chars
Time
Submitted
Pernicious Numbers
ian-h-chamberlain
93
126ms
17 days ago
Pernicious Numbers
snoozingnewt
🥇
55
122ms
20 Oct 2025
Pernicious Numbers
Yax42
57
124ms
4 Oct 2025
Pernicious Numbers
kumavale
🥇
55
137ms
26 Aug 2025
Pernicious Numbers
CaedenHarper
120
111ms
16 Aug 2025
Pernicious Numbers
edsrzf
🥇
55
130ms
22 Jul 2025
Pernicious Numbers
fuzzylojik-golf
🥇
55
117ms
17 Jun 2025
Pernicious Numbers
Lv0Sys
82
122ms
26 May 2025
Pernicious Numbers
emgordon154
🥇
55
123ms
19 Mar 2025
Pernicious Numbers
HumanoidCPU
105
122ms
18 Feb 2025
Pernicious Numbers
acotis
🥇
55
127ms
4 Feb 2025
Pernicious Numbers
Mabeloid
120
110ms
3 Oct 2024
Pernicious Numbers
KatieLG
154
112ms
29 Sep 2024
Pernicious Numbers
pardouin
🥇
55
120ms
19 Aug 2024
Pernicious Numbers
wuzekai518
73
121ms
30 Jul 2024
Pernicious Numbers
Florian-Mt
96
129ms
12 Jul 2024
Pernicious Numbers
Aurel300
78
120ms
8 Jun 2024
Pernicious Numbers
dokutan
🥇
55
122ms
27 Mar 2024
Pernicious Numbers
TylerBloom
78
123ms
22 Mar 2024
Pernicious Numbers
okaponta
84
121ms
11 Jan 2024
Pernicious Numbers
Betuaredead
🥇
55
122ms
11 Nov 2023
Pernicious Numbers
elgan65536
67
121ms
14 Oct 2023
Pernicious Numbers
Yewzir
🥇
55
120ms
11 Oct 2023
Pernicious Numbers
msbranicky
68
119ms
1 Oct 2023
Pernicious Numbers
stacksparrow4
104
125ms
29 Aug 2023
Pernicious Numbers
The3gs
71
123ms
17 Aug 2023
Pernicious Numbers
StHagel
98
128ms
3 Aug 2023
Pernicious Numbers
ovs-code
🥇
55
117ms
17 Jul 2023
Pernicious Numbers
Re-Adventures
85
133ms
9 Jun 2023
Pernicious Numbers
klixel
67
120ms
19 Apr 2023
Pernicious Numbers
Shanethegamer
🥇
55
121ms
6 Feb 2023
Pernicious Numbers
rucin93
🥇
55
121ms
19 Jan 2023
Pernicious Numbers
DialFrost
🥇
55
138ms
12 Jan 2023
Pernicious Numbers
retrohun
120
110ms
28 Dec 2022
Pernicious Numbers
JGDoerrer
78
123ms
20 Dec 2022
Pernicious Numbers
Steffan153
🥇
55
121ms
27 Nov 2022
Pernicious Numbers
MeWhenI
🥇
55
123ms
6 Nov 2022
Pernicious Numbers
andersk
🥇
55
121ms
5 Nov 2022
Pernicious Numbers
stefangimmillaro
🥇
55
119ms
4 Nov 2022
Pernicious Numbers
sean-niemann
🥇
55
122ms
3 Nov 2022
Pernicious Numbers
sisyphus-ppcg
🥇
55
120ms
8 Aug 2022
Pernicious Numbers
yzhs
93
126ms
20 Jul 2022
Pernicious Numbers
KatieLG-Transpiler
157
108ms
24 Jun 2022
Pernicious Numbers
inventshah
🥇
55
121ms
15 Jun 2022
Pernicious Numbers
lynn
🥇
55
122ms
10 Mar 2022
Pernicious Numbers
primo-ppcg
🥇
55
117ms
14 Jan 2022
Pernicious Numbers
Lydxn
🥇
55
119ms
13 Jan 2022
Pernicious Numbers
JayXon
🥇
55
117ms
13 Jan 2022
Pernicious Numbers
GrayJoKing
🥇
55
120ms
13 Jan 2022
Pernicious Numbers
prplz
🥇
55
120ms
13 Jan 2022
Pernicious Numbers
mokymok
154
111ms
11 Nov 2021
Pernicious Numbers
cure-honey
69
120ms
29 Jun 2021
Pernicious Numbers
boxjelly
107
125ms
8 Feb 2021
Pernicious Numbers
argusdusty
84
120ms
31 Dec 2020
Pernicious Numbers
btjones0
78
116ms
28 Dec 2020
Pernicious Numbers
aldanor
79
122ms
4 Dec 2020
Pernicious Numbers
detrumi
89
132ms
22 Oct 2020
Pernicious Numbers
Juici
96
128ms
17 Sep 2020
Pernicious Numbers
WhoisDavid
73
121ms
16 Sep 2020
Pernicious Numbers
benferreri
108
131ms
24 Apr 2020
Pernicious Numbers
frozolotl
71
119ms
8 Jan 2020
Pernicious Numbers
SolidTux
97
127ms
6 Jan 2020
Pernicious Numbers
Skepfyr
80
119ms
4 Jan 2020
Pernicious Numbers
timvermeulen
73
119ms
4 Jan 2020
Pernicious Numbers
jmcomets
83
119ms
4 Jan 2020