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
Bytes
Time
Submitted
Emirp Numbers
luuumine
142
133ms
5 days ago
Emirp Numbers
KatieLG
179
163ms
13 days ago
Emirp Numbers
ian-h-chamberlain
156
145ms
3 Nov 2025
Emirp Numbers
kumavale
🥇
101
122ms
28 Oct 2025
Emirp Numbers
acotis
🥇
101
124ms
28 Oct 2025
Emirp Numbers
snoozingnewt
204
218ms
29 Sep 2025
Emirp Numbers
CaedenHarper
156
114ms
13 Aug 2025
Emirp Numbers
WatMan77
274
191ms
27 Jul 2025
Emirp Numbers
edsrzf
104
125ms
8 Jun 2025
Emirp Numbers
sean-niemann
102
118ms
6 Jun 2025
Emirp Numbers
stefangimmillaro
102
122ms
18 May 2025
Emirp Numbers
ovs-code
132
139ms
25 Apr 2025
Emirp Numbers
emgordon154
102
128ms
18 Apr 2025
Emirp Numbers
yhm138
1,017
207ms
16 Feb 2025
Emirp Numbers
Mabeloid
156
110ms
17 Sep 2024
Emirp Numbers
Shanethegamer
156
111ms
29 Aug 2024
Emirp Numbers
Florian-Mt
180
190ms
12 Jul 2024
Emirp Numbers
lynn
102
133ms
7 Jul 2024
Emirp Numbers
Aurel300
157
109ms
3 Jun 2024
Emirp Numbers
HumanoidCPU
156
108ms
5 May 2024
Emirp Numbers
dokutan
118
122ms
14 Apr 2024
Emirp Numbers
Yewzir
159
121ms
27 Mar 2024
Emirp Numbers
CarsonChr
187
125ms
15 Jan 2024
Emirp Numbers
okaponta
222
224ms
11 Jan 2024
Emirp Numbers
msbranicky
138
137ms
1 Oct 2023
Emirp Numbers
elgan65536
139
127ms
29 Sep 2023
Emirp Numbers
StHagel
200
175ms
24 Aug 2023
Emirp Numbers
Re-Adventures
143
132ms
18 Aug 2023
Emirp Numbers
detrumi
130
113ms
26 Apr 2023
Emirp Numbers
klixel
156
108ms
15 Apr 2023
Emirp Numbers
sona-tau
211
185ms
10 Mar 2023
Emirp Numbers
Z-snails
185
186ms
1 Mar 2023
Emirp Numbers
Steffan153
103
123ms
28 Jan 2023
Emirp Numbers
scpchicken
146
122ms
23 Jan 2023
Emirp Numbers
Domicnt
207
188ms
4 Jan 2023
Emirp Numbers
retrohun
156
109ms
27 Dec 2022
Emirp Numbers
MeWhenI
144
117ms
13 Nov 2022
Emirp Numbers
Starwort
184
215ms
11 Nov 2022
Emirp Numbers
andersk
104
111ms
8 Nov 2022
Emirp Numbers
KatieLG-Transpiler
194
106ms
24 Jun 2022
Emirp Numbers
primo-ppcg
115
118ms
2 May 2022
Emirp Numbers
prplz
117
121ms
30 Apr 2022
Emirp Numbers
SpareManiKatti
156
108ms
19 Apr 2022
Emirp Numbers
verticallity
109
120ms
7 Apr 2022
Emirp Numbers
Lydxn
102
120ms
26 Mar 2022
Emirp Numbers
JGDoerrer
147
131ms
29 Jan 2022
Emirp Numbers
1337-man
166
110ms
24 Jan 2022
Emirp Numbers
JayXon
🥇
101
121ms
14 Jan 2022
Emirp Numbers
aazuspan
204
177ms
2 Dec 2021
Emirp Numbers
mokymok
193
107ms
8 Nov 2021
Emirp Numbers
anna099
285
199ms
22 Jul 2021
Emirp Numbers
zeerooth
193
109ms
4 Feb 2021
Emirp Numbers
btjones0
131
131ms
28 Dec 2020
Emirp Numbers
WhoisDavid
143
126ms
14 Sep 2020
Emirp Numbers
antonymerle
374
230ms
21 May 2020
Emirp Numbers
frozolotl
141
122ms
8 Jan 2020
Emirp Numbers
Skepfyr
171
186ms
4 Jan 2020
Emirp Numbers
timvermeulen
156
107ms
4 Jan 2020