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
Calendar
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
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
ArkScript
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
ArkScript
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
Calendar
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
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’s Constant
retrohun
1,185
1,658ms
2 days ago
Catalan’s Constant
ryyyn
103
32ms
3 days ago
Catalan’s Constant
primo-ppcg
🥈
130
100ms
7 days ago
Catalan’s Constant
DialFrost
💎
202
1,739ms
8 days ago
Catalan’s Constant
dokutan
228
9ms
13 days ago
Catalan’s Constant
KatieLG-Transpiler
1,006
3ms
16 days ago
Catalan’s Constant
KatieLG-Transpiler
1,011
9ms
16 days ago
Catalan’s Constant
KatieLG-Transpiler
1,009
3ms
16 days ago
Catalan’s Constant
JOrE20
1,011
96ms
18 days ago
Catalan’s Constant
JOrE20
1,018
2ms
18 days ago
Catalan’s Constant
JOrE20
1,286
1,875ms
18 days ago
Catalan’s Constant
JOrE20
1,008
1,021ms
18 days ago
Catalan’s Constant
JOrE20
1,011
68ms
18 days ago
Catalan’s Constant
JOrE20
1,010
1ms
18 days ago
Catalan’s Constant
JOrE20
1,003
2ms
18 days ago
Catalan’s Constant
JOrE20
1,009
3ms
18 days ago
Catalan’s Constant
JOrE20
1,012
43ms
18 days ago
Catalan’s Constant
JOrE20
1,008
37ms
18 days ago
Catalan’s Constant
JOrE20
1,013
72ms
18 days ago
Catalan’s Constant
JOrE20
1,011
10ms
18 days ago
Catalan’s Constant
JOrE20
1,050
116ms
18 days ago
Catalan’s Constant
JOrE20
1,008
84ms
18 days ago
Catalan’s Constant
JOrE20
1,014
9ms
18 days ago
Catalan’s Constant
JOrE20
1,004
170ms
18 days ago
Catalan’s Constant
JOrE20
1,009
5ms
18 days ago
Catalan’s Constant
JOrE20
1,007
3ms
18 days ago
Catalan’s Constant
JOrE20
1,019
23ms
18 days ago
Catalan’s Constant
JOrE20
1,008
123ms
18 days ago
Catalan’s Constant
JOrE20
1,011
2ms
18 days ago
Catalan’s Constant
JOrE20
1,011
2,042ms
18 days ago
Catalan’s Constant
JOrE20
1,011
155ms
18 days ago
Catalan’s Constant
JOrE20
1,001
4ms
18 days ago
Catalan’s Constant
JOrE20
1,066
351ms
18 days ago
Catalan’s Constant
JOrE20
1,011
4ms
18 days ago
Catalan’s Constant
JOrE20
1,010
34ms
18 days ago
Catalan’s Constant
JOrE20
1,067
117ms
18 days ago
Catalan’s Constant
JOrE20
1,009
645ms
18 days ago
Catalan’s Constant
JOrE20
1,004
40ms
18 days ago
Catalan’s Constant
JOrE20
1,098
247ms
18 days ago
Catalan’s Constant
JOrE20
1,128
1,421ms
18 days ago
Catalan’s Constant
JOrE20
1,166
40ms
18 days ago
Catalan’s Constant
JOrE20
🥉
1,007
3ms
18 days ago
Catalan’s Constant
JOrE20
1,010
61ms
18 days ago
Catalan’s Constant
JOrE20
1,071
1,305ms
18 days ago
Catalan’s Constant
JOrE20
1,025
120ms
18 days ago
Catalan’s Constant
JOrE20
387
79ms
18 days ago
Catalan’s Constant
JOrE20
1,075
103ms
18 days ago
Catalan’s Constant
JOrE20
1,082
172ms
18 days ago
Catalan’s Constant
JOrE20
1,009
1,270ms
18 days ago
Catalan’s Constant
JOrE20
1,017
6ms
18 days ago
Catalan’s Constant
JOrE20
1,011
411ms
18 days ago
Catalan’s Constant
JOrE20
1,011
6ms
18 days ago
Catalan’s Constant
JOrE20
1,048
2,027ms
18 days ago
Catalan’s Constant
JOrE20
1,016
120ms
18 days ago
Catalan’s Constant
JOrE20
1,020
382ms
18 days ago
Catalan’s Constant
JOrE20
1,019
2ms
18 days ago
Catalan’s Constant
JOrE20
1,011
2ms
18 days ago
Catalan’s Constant
JOrE20
1,004
39ms
18 days ago
Catalan’s Constant
JOrE20
1,007
2ms
18 days ago
Catalan’s Constant
JOrE20
1,361
2ms
18 days ago
Catalan’s Constant
CommandLeo
141
41ms
18 days ago
Catalan’s Constant
dokutan
🥈
689
12ms
19 days ago
Catalan’s Constant
JOrE20
1,048
11ms
22 days ago
Catalan’s Constant
mwarvik
1,020
354ms
23 days ago
Catalan’s Constant
amazingalek
390
465ms
23 days ago
Catalan’s Constant
HumanoidCPU
1,011
5ms
23 days ago
Catalan’s Constant
dokutan
748
403ms
27 Dec 2025
Catalan’s Constant
HumanoidCPU
542
700ms
27 Dec 2025
Catalan’s Constant
dokutan
382
3ms
26 Dec 2025
Catalan’s Constant
Lv0Sys
110
25ms
25 Dec 2025
Catalan’s Constant
madex
293
23ms
24 Dec 2025
Catalan’s Constant
jared-hughes
🥉
141
287ms
24 Dec 2025
Catalan’s Constant
sean-niemann
💎
127
195ms
23 Dec 2025
Catalan’s Constant
JOrE20
838
10ms
21 Dec 2025
Catalan’s Constant
amazingalek
1,011
9ms
20 Dec 2025
Catalan’s Constant
amazingalek
1,030
385ms
19 Dec 2025
Catalan’s Constant
JOrE20
🥉
1,008
4ms
18 Dec 2025
Catalan’s Constant
ravnskjaer
659
339ms
15 Dec 2025
Catalan’s Constant
dokutan
360
78ms
12 Dec 2025
Catalan’s Constant
dokutan
💎
211
121ms
12 Dec 2025