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
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
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
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
Multitap Input
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
><>
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
ALGOL 68
APL
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
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
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
ALGOL 68
APL
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
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
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
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
Multitap Input
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
Chars
Time
Submitted
Happy Numbers
ian-h-chamberlain
126
123ms
5 days ago
Happy Numbers
CaedenHarper
121
146ms
8 days ago
Happy Numbers
KatieLG
150
176ms
9 days ago
Happy Numbers
snoozingnewt
88
160ms
11 days ago
Happy Numbers
levinwinter
128
117ms
17 days ago
Happy Numbers
Laellekoenig
133
148ms
3 Nov 2025
Happy Numbers
webmiche
129
128ms
3 Nov 2025
Happy Numbers
Mabeloid
121
141ms
31 Oct 2025
Happy Numbers
Pale-Vessel
144
328ms
23 Sep 2025
Happy Numbers
kumavale
87
151ms
17 Aug 2025
Happy Numbers
dokutan
90
135ms
23 Jul 2025
Happy Numbers
Natanaelel
115
144ms
23 Jul 2025
Happy Numbers
sean-niemann
87
152ms
6 Jun 2025
Happy Numbers
pogwolfe
134
149ms
4 Jun 2025
Happy Numbers
jaxmattfair
133
161ms
4 Jun 2025
Happy Numbers
ovs-code
87
142ms
20 Apr 2025
Happy Numbers
acotis
87
277ms
15 Apr 2025
Happy Numbers
DialFrost
87
141ms
4 Apr 2025
Happy Numbers
edsrzf
87
155ms
4 Mar 2025
Happy Numbers
JunkIce
90
138ms
23 Feb 2025
Happy Numbers
emgordon154
87
127ms
18 Feb 2025
Happy Numbers
The3gs
115
143ms
29 Nov 2024
Happy Numbers
pardouin
86
129ms
24 Aug 2024
Happy Numbers
lynn
87
186ms
7 Jul 2024
Happy Numbers
HumanoidCPU
127
133ms
3 May 2024
Happy Numbers
mousetail
118
214ms
15 Jan 2024
Happy Numbers
Yewzir
119
150ms
14 Jan 2024
Happy Numbers
Eugen-str
261
250ms
31 Oct 2023
Happy Numbers
stefangimmillaro
76
161ms
4 Oct 2023
Happy Numbers
elgan65536
85
133ms
22 Sep 2023
Happy Numbers
msbranicky
129
130ms
9 Sep 2023
Happy Numbers
MeWhenI
119
160ms
9 May 2023
Happy Numbers
Steffan153
69
189ms
25 Apr 2023
Happy Numbers
kgodara
88
166ms
11 Mar 2023
Happy Numbers
zt14427
160
144ms
4 Mar 2023
Happy Numbers
retrohun
127
116ms
27 Dec 2022
Happy Numbers
klixel
127
169ms
5 Dec 2022
Happy Numbers
wiebecommajonas
158
160ms
30 Nov 2022
Happy Numbers
jared-hughes
88
154ms
10 Nov 2022
Happy Numbers
andersk
🥉
68
130ms
22 Oct 2022
Happy Numbers
Re-Adventures
123
165ms
27 Aug 2022
Happy Numbers
KatieLG-Transpiler
161
119ms
24 Jun 2022
Happy Numbers
gbxdl
122
185ms
14 Jun 2022
Happy Numbers
scpchicken
127
165ms
17 May 2022
Happy Numbers
prplz
86
154ms
30 Apr 2022
Happy Numbers
JGDoerrer
139
133ms
5 Feb 2022
Happy Numbers
primo-ppcg
69
164ms
14 Jan 2022
Happy Numbers
JayXon
🥇
67
169ms
14 Jan 2022
Happy Numbers
Lydxn
🥇
67
136ms
13 Jan 2022
Happy Numbers
Shanethegamer
119
203ms
13 Jan 2022
Happy Numbers
mokymok
160
167ms
8 Nov 2021
Happy Numbers
anna099
298
246ms
15 Aug 2021
Happy Numbers
dijs
422
162ms
24 Jun 2021
Happy Numbers
GrayJoKing
111
151ms
24 Mar 2021
Happy Numbers
jiaminglimjm
127
118ms
3 Jan 2021
Happy Numbers
btjones0
110
137ms
29 Dec 2020
Happy Numbers
neeldug
561
149ms
29 Jul 2020
Happy Numbers
antonymerle
317
207ms
19 May 2020
Happy Numbers
timvermeulen
116
140ms
6 Jan 2020
Happy Numbers
Aloso
144
221ms
4 Jan 2020
Happy Numbers
snakehand
220
273ms
4 Jan 2020
Happy Numbers
minno726
131
132ms
4 Jan 2020