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’s Constant
dokutan
💎
272
101ms
5 hours ago
Catalan’s Constant
ovs-code
🥈
127
833ms
21 hours ago
Catalan’s Constant
Kacarott
104
4,341ms
29 hours ago
Catalan’s Constant
snoozingnewt
💎
442
30ms
3 days ago
Catalan’s Constant
Shanethegamer
1,006
2ms
3 days ago
Catalan’s Constant
BREMAUCY
🥇
46
218ms
3 days ago
Catalan’s Constant
HumanoidCPU
1,006
1ms
3 days ago
Catalan’s Constant
Lv0Sys
151
131ms
4 days ago
Catalan’s Constant
Lv0Sys
142
625ms
4 days ago
Catalan’s Constant
cros107
126
266ms
4 days ago
Catalan’s Constant
Yax42
207
572ms
4 days ago
Catalan’s Constant
HumanoidCPU
1,086
10ms
6 days ago
Catalan’s Constant
dokutan
383
2ms
7 days ago
Catalan’s Constant
CaedenHarper
1,025
97ms
8 days ago
Catalan’s Constant
msbranicky
1,025
94ms
8 days ago
Catalan’s Constant
dokutan
🥉
425
34ms
9 days ago
Catalan’s Constant
JOrE20
979
7ms
10 days ago
Catalan’s Constant
KatieLG
1,005
111ms
10 days ago
Catalan’s Constant
KatieLG
989
7ms
10 days ago
Catalan’s Constant
KatieLG
1,007
3ms
10 days ago
Catalan’s Constant
KatieLG
1,005
96ms
10 days ago
Catalan’s Constant
KatieLG
1,004
645ms
10 days ago
Catalan’s Constant
KatieLG
998
80ms
10 days ago
Catalan’s Constant
KatieLG
1,008
157ms
10 days ago
Catalan’s Constant
KatieLG
1,022
218ms
10 days ago
Catalan’s Constant
KatieLG
981
3ms
10 days ago
Catalan’s Constant
KatieLG
1,039
391ms
10 days ago
Catalan’s Constant
KatieLG
1,018
327ms
10 days ago
Catalan’s Constant
KatieLG
994
750ms
10 days ago
Catalan’s Constant
h3ra993huskp
295
426ms
10 days ago
Catalan’s Constant
tigerdan2
1,033
420ms
10 days ago
Catalan’s Constant
blaztoma
🥈
351
123ms
11 days ago
Catalan’s Constant
bizy-coder
85
13ms
14 days ago
Catalan’s Constant
JOrE20
1,021
32ms
15 days ago
Catalan’s Constant
AdrienHache
137
383ms
15 days ago
Catalan’s Constant
JayXon
🥉
63
359ms
15 days ago
Catalan’s Constant
JayXon
64
15ms
15 days ago
Catalan’s Constant
Carlos-EAC
1,011
9ms
15 days ago
Catalan’s Constant
Carlos-EAC
1,046
1,096ms
15 days ago
Catalan’s Constant
CornerMercury
70
10ms
16 days ago
Catalan’s Constant
edsrzf
🥈
112
84ms
17 days ago
Catalan’s Constant
kg583
💎
93
120ms
17 days ago
Catalan’s Constant
sean-niemann
💎
72
820ms
17 days ago
Catalan’s Constant
edsrzf
🥉
82
1,534ms
17 days ago
Catalan’s Constant
edsrzf
134
94ms
18 days ago
Catalan’s Constant
TheZwierzLF
1,015
325ms
18 days ago
Catalan’s Constant
edsrzf
141
100ms
18 days ago
Catalan’s Constant
KatieLG
1,013
1ms
18 days ago
Catalan’s Constant
KatieLG
1,011
3ms
18 days ago
Catalan’s Constant
KatieLG
1,045
6ms
18 days ago
Catalan’s Constant
namelessiw
39
1,680ms
19 days ago
Catalan’s Constant
TheZwierzLF
1,015
10ms
19 days ago
Catalan’s Constant
snoozingnewt
475
510ms
19 days ago
Catalan’s Constant
HumanoidCPU
533
2ms
19 days ago
Catalan’s Constant
emgordon154
72
2,258ms
23 days ago
Catalan’s Constant
ryyyn
104
32ms
24 days ago
Catalan’s Constant
ndren
1,011
1ms
26 days ago
Catalan’s Constant
Yewzir
1,011
1ms
26 days ago
Catalan’s Constant
Yewzir
🥉
362
2,229ms
26 days ago
Catalan’s Constant
gigaprofisi
1,020
100ms
27 days ago
Catalan’s Constant
sean-niemann
💎
149
247ms
27 days ago
Catalan’s Constant
HumanoidCPU
1,011
2ms
27 days ago
Catalan’s Constant
Shanethegamer
1,011
1ms
12 Nov 2025
Catalan’s Constant
CaedenHarper
1,011
1ms
12 Nov 2025
Catalan’s Constant
snoozingnewt
1,011
1ms
12 Nov 2025
Catalan’s Constant
HumanoidCPU
1,023
3ms
10 Nov 2025
Catalan’s Constant
HumanoidCPU
1,012
133ms
10 Nov 2025
Catalan’s Constant
luuumine
1,007
2ms
10 Nov 2025
Catalan’s Constant
luuumine
1,019
2ms
9 Nov 2025
Catalan’s Constant
JOrE20
2,892
2ms
8 Nov 2025
Catalan’s Constant
HumanoidCPU
1,028
435ms
8 Nov 2025
Catalan’s Constant
MeWhenI
683
1,637ms
7 Nov 2025
Catalan’s Constant
MeWhenI
226
460ms
7 Nov 2025
Catalan’s Constant
dokutan
🥉
283
2ms
7 Nov 2025
Catalan’s Constant
alexsave
111
17ms
6 Nov 2025