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
Catalan Numbers
snoozingnewt
51
118ms
7 days ago
Catalan Numbers
fuzzylojik-golf
🥇
49
121ms
14 Sep 2025
Catalan Numbers
blaztoma
57
120ms
22 Aug 2025
Catalan Numbers
YAJUE114514
60
147ms
23 Jul 2025
Catalan Numbers
jipsong
51
119ms
11 Feb 2025
Catalan Numbers
CaedenHarper
2,983
112ms
24 Jan 2025
Catalan Numbers
sean-niemann
🥇
49
134ms
30 Dec 2024
Catalan Numbers
error256
🥇
49
128ms
26 Oct 2024
Catalan Numbers
pardouin
🥇
49
122ms
8 Oct 2024
Catalan Numbers
Mabeloid
2,983
107ms
17 Sep 2024
Catalan Numbers
tobeannouncd
51
138ms
9 Aug 2024
Catalan Numbers
DialFrost
🥇
49
120ms
5 Aug 2024
Catalan Numbers
jtaxen
53
124ms
16 Jul 2024
Catalan Numbers
HumanoidCPU
2,983
118ms
22 May 2024
Catalan Numbers
inverseLorentz
61
124ms
23 Apr 2024
Catalan Numbers
levikeck
72
126ms
9 Apr 2024
Catalan Numbers
MeWhenI
51
119ms
22 Mar 2024
Catalan Numbers
the-zammers
51
121ms
18 Jan 2024
Catalan Numbers
brimstonetrader
60
125ms
10 Jan 2024
Catalan Numbers
Natanaelel
🥇
49
124ms
3 Jan 2024
Catalan Numbers
regr4
77
144ms
13 Nov 2023
Catalan Numbers
btnlq
🥇
49
125ms
17 Oct 2023
Catalan Numbers
aDwarfNamedUrist
65
124ms
9 Oct 2023
Catalan Numbers
cbrt-x
55
121ms
19 Sep 2023
Catalan Numbers
CatsAreFluffy
69
123ms
2 Sep 2023
Catalan Numbers
KatieLG-Transpiler
2,983
116ms
14 May 2023
Catalan Numbers
Z-snails
59
129ms
28 Feb 2023
Catalan Numbers
Jeremy-Stafford
61
124ms
28 Feb 2023
Catalan Numbers
retrohun
2,983
113ms
27 Dec 2022
Catalan Numbers
Steffan153
🥇
49
127ms
24 Sep 2022
Catalan Numbers
strout
69
130ms
14 Aug 2022
Catalan Numbers
yzhs
56
121ms
16 Jun 2022
Catalan Numbers
Awsute
56
122ms
21 Apr 2022
Catalan Numbers
Sakisan
🥇
49
126ms
7 Apr 2022
Catalan Numbers
GrayJoKing
🥇
49
124ms
10 Mar 2022
Catalan Numbers
ovs-code
🥇
49
125ms
6 Mar 2022
Catalan Numbers
arjanadriaanse
🥇
49
123ms
9 Feb 2022
Catalan Numbers
xnor-gate
🥇
49
127ms
30 Jan 2022
Catalan Numbers
HPWiz
🥇
49
124ms
29 Jan 2022
Catalan Numbers
rak1507
🥇
49
124ms
29 Jan 2022
Catalan Numbers
KatieLG
2,983
129ms
29 Jan 2022
Catalan Numbers
annaproxy
🥇
49
123ms
29 Jan 2022
Catalan Numbers
primo-ppcg
51
119ms
29 Jan 2022
Catalan Numbers
JayXon
🥇
49
126ms
29 Jan 2022
Catalan Numbers
Irratix
64
125ms
29 Jan 2022
Catalan Numbers
Lydxn
🥇
49
129ms
29 Jan 2022
Catalan Numbers
lynn
🥇
49
124ms
29 Jan 2022
Catalan Numbers
Shanethegamer
59
122ms
29 Jan 2022