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
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
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
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Tower of Hanoi
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
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
Erlang
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
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
Erlang
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
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
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Tower of Hanoi
Turtle
Tutorial
Hole
Golfer
Chars
Time
Submitted
Catalan Numbers
sunleonid
🥇
44
10ms
5 mins ago
Catalan Numbers
luuumine
47
9ms
76 mins ago
Catalan Numbers
HumanoidCPU
1,468
3ms
14 hours ago
Catalan Numbers
CaedenHarper
161
266ms
16 hours ago
Catalan Numbers
rucin93
💎
228
309ms
2 days ago
Catalan Numbers
KatieLG
2,590
63ms
2 days ago
Catalan Numbers
KatieLG
2,783
13ms
2 days ago
Catalan Numbers
Voltrifrodec
62
10ms
3 days ago
Catalan Numbers
ethanlally
181
404ms
5 days ago
Catalan Numbers
xsot
🥉
39
657ms
5 days ago
Catalan Numbers
Yewzir
44
740ms
5 days ago
Catalan Numbers
JOrE20
50
9ms
5 days ago
Catalan Numbers
Tristanchaang
61
10ms
6 days ago
Catalan Numbers
JOrE20
2,869
8ms
6 days ago
Catalan Numbers
Yewzir
2,979
1ms
7 days ago
Catalan Numbers
Yewzir
135
1,576ms
7 days ago
Catalan Numbers
DialFrost
155
344ms
7 days ago
Catalan Numbers
albanian-laundromat
59
67ms
7 days ago
Catalan Numbers
HumanoidCPU
2,979
1ms
8 days ago
Catalan Numbers
Shanethegamer
2,979
1ms
8 days ago
Catalan Numbers
CaedenHarper
2,979
1ms
8 days ago
Catalan Numbers
CommandLeo
48
10ms
9 days ago
Catalan Numbers
HumanoidCPU
3,229
24ms
10 days ago
Catalan Numbers
HumanoidCPU
3,172
6ms
12 days ago
Catalan Numbers
HumanoidCPU
2,902
331ms
13 days ago
Catalan Numbers
dokutan
136
349ms
13 days ago
Catalan Numbers
MeWhenI
🥈
131
1,599ms
13 days ago
Catalan Numbers
MeWhenI
120
349ms
13 days ago
Catalan Numbers
emgordon154
29
2ms
13 days ago
Catalan Numbers
emgordon154
🥉
20
34ms
13 days ago
Catalan Numbers
JOrE20
9,634
3ms
14 days ago
Catalan Numbers
XenThe
104
10ms
15 days ago
Catalan Numbers
alexsave
44
9ms
15 days ago
Catalan Numbers
gigaprofisi
2,881
40ms
15 days ago
Catalan Numbers
HumanoidCPU
3,311
33ms
16 days ago
Catalan Numbers
Aquateraneal
88
10ms
16 days ago
Catalan Numbers
XenThe
68
14ms
16 days ago
Catalan Numbers
snoozingnewt
46
330ms
17 days ago
Catalan Numbers
CaedenHarper
80
360ms
21 days ago
Catalan Numbers
CaedenHarper
🥇
41
8ms
21 days ago
Catalan Numbers
CaedenHarper
🥉
39
681ms
21 days ago
Catalan Numbers
CaedenHarper
41
324ms
21 days ago
Catalan Numbers
CaedenHarper
🥇
44
9ms
21 days ago
Catalan Numbers
snoozingnewt
84
3ms
22 days ago
Catalan Numbers
snoozingnewt
110
9ms
22 days ago
Catalan Numbers
snoozingnewt
47
211ms
22 days ago
Catalan Numbers
snoozingnewt
62
82ms
22 days ago
Catalan Numbers
snoozingnewt
136
1,282ms
22 days ago
Catalan Numbers
snoozingnewt
49
714ms
22 days ago
Catalan Numbers
snoozingnewt
80
41ms
22 days ago
Catalan Numbers
snoozingnewt
60
175ms
22 days ago
Catalan Numbers
snoozingnewt
58
28ms
22 days ago
Catalan Numbers
snoozingnewt
56
112ms
22 days ago
Catalan Numbers
snoozingnewt
154
282ms
22 days ago
Catalan Numbers
snoozingnewt
99
348ms
22 days ago
Catalan Numbers
snoozingnewt
171
328ms
22 days ago
Catalan Numbers
snoozingnewt
98
99ms
22 days ago
Catalan Numbers
snoozingnewt
88
419ms
22 days ago
Catalan Numbers
snoozingnewt
89
6ms
22 days ago
Catalan Numbers
snoozingnewt
87
7ms
22 days ago
Catalan Numbers
CornerMercury
🥇
44
9ms
24 days ago
Catalan Numbers
snoozingnewt
48
9ms
26 days ago
Catalan Numbers
KatieLG
2,993
141ms
27 days ago
Catalan Numbers
Laellekoenig
61
10ms
24 Oct 2025
Catalan Numbers
kmathis22
135
337ms
23 Oct 2025
Catalan Numbers
ryyyn
🥇
44
10ms
23 Oct 2025
Catalan Numbers
Babafaba
47
8ms
22 Oct 2025
Catalan Numbers
Babafaba
43
334ms
22 Oct 2025
Catalan Numbers
Babafaba
🥇
44
9ms
22 Oct 2025
Catalan Numbers
dokutan
1,068
1,583ms
21 Oct 2025
Catalan Numbers
madeforlosers
61
11ms
20 Oct 2025
Catalan Numbers
snoozingnewt
44
10ms
19 Oct 2025
Catalan Numbers
snoozingnewt
🥉
1,409
72ms
18 Oct 2025
Catalan Numbers
CheeseCake628
50
438ms
18 Oct 2025
Catalan Numbers
Europe2048
49
10ms
18 Oct 2025