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
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
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
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Apéry’s Constant
Calendar
Connect Four
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
Hilbert Curve
Minesweeper
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Snake
Sphenic Numbers
Trinomial Triangle
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
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
Groovy
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
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
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
Groovy
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
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
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
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
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Experimental Hole
Apéry’s Constant
Calendar
Connect Four
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
Hilbert Curve
Minesweeper
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Snake
Sphenic Numbers
Trinomial Triangle
Turtle
Tutorial
Hole
Golfer
Chars
Submitted
Catalan’s Constant
acollett89
821
20 days ago
Catalan’s Constant
52525rr
205
15 Jul 2025
Catalan’s Constant
XenThe
549
7 Jul 2025
Catalan’s Constant
gigaprofisi
124
20 Jun 2025
Catalan’s Constant
madeforlosers
382
28 Apr 2025
Catalan’s Constant
a6166231
1,011
25 Apr 2025
Catalan’s Constant
ArmaanAS
243
18 Feb 2025
Catalan’s Constant
targrik
119
17 Feb 2025
Catalan’s Constant
ovs-code
75
14 Feb 2025
Catalan’s Constant
CaedenHarper
1,009
22 Jan 2025
Catalan’s Constant
stefangimmillaro
81
30 Dec 2024
Catalan’s Constant
eranws
228
23 Dec 2024
Catalan’s Constant
KatieLG
151
25 Oct 2024
Catalan’s Constant
pardouin
75
27 Sep 2024
Catalan’s Constant
Mabeloid
1,011
17 Sep 2024
Catalan’s Constant
msbranicky
1,012
14 Aug 2024
Catalan’s Constant
JayXon
💎
67
10 Aug 2024
Catalan’s Constant
dokutan
362
3 Aug 2024
Catalan’s Constant
vlpx
79
1 Aug 2024
Catalan’s Constant
thisishowmymindworks
235
28 Jun 2024
Catalan’s Constant
bac0id
336
26 Jun 2024
Catalan’s Constant
hacker112
355
22 Jun 2024
Catalan’s Constant
HumanoidCPU
545
5 May 2024
Catalan’s Constant
wansacis
1,011
1 May 2024
Catalan’s Constant
coreynash
336
6 Apr 2024
Catalan’s Constant
two-bad
243
15 Feb 2024
Catalan’s Constant
1231234md5
243
29 Jan 2024
Catalan’s Constant
trinityy-7
111
23 Jan 2024
Catalan’s Constant
lukegustafson
81
15 Nov 2023
Catalan’s Constant
sean-niemann
79
3 Nov 2023
Catalan’s Constant
rucin93
79
3 Nov 2023
Catalan’s Constant
Steffan153
79
1 Nov 2023
Catalan’s Constant
DialFrost
85
27 Aug 2023
Catalan’s Constant
Argeento
83
27 Aug 2023
Catalan’s Constant
apokryfos
1,011
21 Aug 2023
Catalan’s Constant
Yewzir
215
7 Jul 2023
Catalan’s Constant
jmerle
417
2 Jul 2023
Catalan’s Constant
zakariamouhid
214
25 Jun 2023
Catalan’s Constant
Pyro569
1,017
25 Jun 2023
Catalan’s Constant
adamnielson42
1,011
1 Jun 2023
Catalan’s Constant
TaserTheFox
1,011
26 May 2023
Catalan’s Constant
tayloia
98
16 May 2023
Catalan’s Constant
hacker19374
1,011
7 Mar 2023
Catalan’s Constant
voytxt
417
1 Mar 2023
Catalan’s Constant
AlephSquirrel
117
15 Feb 2023
Catalan’s Constant
jared-hughes
76
20 Jan 2023
Catalan’s Constant
retrohun
1,011
27 Dec 2022
Catalan’s Constant
CatsAreFluffy
130
20 Dec 2022
Catalan’s Constant
GeorgeStechman
138
16 Nov 2022
Catalan’s Constant
Modular-Holmes
1,011
9 Nov 2022
Catalan’s Constant
KatieLG-Transpiler
1,011
23 Jun 2022
Catalan’s Constant
dmrichwa
81
31 May 2022
Catalan’s Constant
Shanethegamer
96
26 May 2022
Catalan’s Constant
itsh01
208
10 Mar 2022
Catalan’s Constant
uttumuttu
130
7 Mar 2022
Catalan’s Constant
Irratix
81
4 Mar 2022
Catalan’s Constant
gnlow
846
27 Jan 2022
Catalan’s Constant
didion0
87
25 Jan 2022
Catalan’s Constant
1337-man
1,011
19 Jan 2022
Catalan’s Constant
akshatj27
846
19 Jan 2022
Catalan’s Constant
WilleyOhana
1,011
18 Jan 2022
Catalan’s Constant
primo-ppcg
🥈
74
14 Jan 2022
Catalan’s Constant
NewDefectus
82
5 Jan 2022
Catalan’s Constant
jackkav
1,009
4 Jan 2022
Catalan’s Constant
emplv
78
3 Jan 2022
Catalan’s Constant
janbehrens
129
2 Jan 2022
Catalan’s Constant
SirBogman
107
2 Jan 2022
Catalan’s Constant
Lydxn
🥈
74
2 Jan 2022
Catalan’s Constant
MeWhenI
87
2 Jan 2022
Catalan’s Constant
JRaspass
1,009
2 Jan 2022