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
Multitap Input
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
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
Lily
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
Lily
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
Multitap Input
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
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
Kolakoski Constant
Yewzir
238
2ms
6 hours ago
Kolakoski Constant
dokutan
658
5ms
14 hours ago
Kolakoski Constant
dokutan
115
90ms
16 hours ago
Kolakoski Constant
Shanethegamer
1,010
6ms
36 hours ago
Kolakoski Constant
Shanethegamer
1,011
2ms
36 hours ago
Kolakoski Constant
elgan65536
252
119ms
42 hours ago
Kolakoski Constant
frosster
🥉
151
794ms
2 days ago
Kolakoski Constant
dokutan
247
2ms
3 days ago
Kolakoski Constant
HumanoidCPU
1,011
2ms
3 days ago
Kolakoski Constant
JOrE20
107
238ms
5 days ago
Kolakoski Constant
Andrey2001
244
43ms
8 days ago
Kolakoski Constant
JOrE20
1,009
104ms
9 days ago
Kolakoski Constant
Andrey2001
1,011
368ms
11 days ago
Kolakoski Constant
JOrE20
1,014
10ms
11 days ago
Kolakoski Constant
JOrE20
1,012
38ms
11 days ago
Kolakoski Constant
JOrE20
1,050
113ms
11 days ago
Kolakoski Constant
JOrE20
1,011
2,085ms
11 days ago
Kolakoski Constant
JOrE20
1,011
69ms
11 days ago
Kolakoski Constant
JOrE20
1,007
3ms
11 days ago
Kolakoski Constant
JOrE20
1,008
35ms
11 days ago
Kolakoski Constant
JOrE20
1,011
4ms
11 days ago
Kolakoski Constant
JOrE20
1,008
1,021ms
11 days ago
Kolakoski Constant
JOrE20
1,018
2ms
11 days ago
Kolakoski Constant
JOrE20
1,011
2ms
11 days ago
Kolakoski Constant
JOrE20
1,286
1,612ms
11 days ago
Kolakoski Constant
JOrE20
1,044
1,413ms
11 days ago
Kolakoski Constant
JOrE20
1,008
86ms
11 days ago
Kolakoski Constant
JOrE20
1,004
208ms
11 days ago
Kolakoski Constant
JOrE20
1,008
122ms
11 days ago
Kolakoski Constant
JOrE20
1,007
3ms
11 days ago
Kolakoski Constant
JOrE20
1,028
367ms
11 days ago
Kolakoski Constant
JOrE20
1,011
1ms
11 days ago
Kolakoski Constant
JOrE20
1,017
23ms
11 days ago
Kolakoski Constant
JOrE20
1,011
156ms
11 days ago
Kolakoski Constant
JOrE20
1,010
35ms
11 days ago
Kolakoski Constant
JOrE20
1,009
656ms
11 days ago
Kolakoski Constant
JOrE20
1,009
1,203ms
11 days ago
Kolakoski Constant
JOrE20
1,010
63ms
11 days ago
Kolakoski Constant
JOrE20
1,015
122ms
11 days ago
Kolakoski Constant
JOrE20
1,071
1,262ms
11 days ago
Kolakoski Constant
JOrE20
1,082
163ms
11 days ago
Kolakoski Constant
JOrE20
1,011
473ms
11 days ago
Kolakoski Constant
JOrE20
1,011
6ms
11 days ago
Kolakoski Constant
JOrE20
1,001
3ms
11 days ago
Kolakoski Constant
JOrE20
1,016
111ms
11 days ago
Kolakoski Constant
JOrE20
1,038
5ms
11 days ago
Kolakoski Constant
JOrE20
1,037
380ms
11 days ago
Kolakoski Constant
JOrE20
1,104
2ms
11 days ago
Kolakoski Constant
JOrE20
1,111
2,047ms
11 days ago
Kolakoski Constant
JOrE20
1,007
2ms
11 days ago
Kolakoski Constant
JOrE20
1,082
274ms
11 days ago
Kolakoski Constant
JOrE20
1,073
40ms
11 days ago
Kolakoski Constant
JOrE20
1,062
107ms
11 days ago
Kolakoski Constant
JOrE20
1,024
66ms
11 days ago
Kolakoski Constant
CommandLeo
100
35ms
14 days ago
Kolakoski Constant
bac0id
1,011
1ms
14 days ago
Kolakoski Constant
dokutan
272
76ms
16 days ago
Kolakoski Constant
retrohun
1,185
1,760ms
17 days ago
Kolakoski Constant
Yax42
113
13ms
18 days ago
Kolakoski Constant
amazingalek
1,020
394ms
18 days ago
Kolakoski Constant
sean-niemann
💎
66
984ms
20 days ago
Kolakoski Constant
plcc0
71
19ms
25 days ago
Kolakoski Constant
ryyyn
80
71ms
11 Jan 2026
Kolakoski Constant
dokutan
231
9ms
11 Jan 2026
Kolakoski Constant
KatieLG-Transpiler
1,006
2ms
9 Jan 2026
Kolakoski Constant
KatieLG-Transpiler
1,011
9ms
9 Jan 2026
Kolakoski Constant
KatieLG-Transpiler
1,009
3ms
9 Jan 2026
Kolakoski Constant
KatieLG
89
105ms
7 Jan 2026
Kolakoski Constant
JOrE20
1,004
38ms
6 Jan 2026
Kolakoski Constant
dokutan
🥈
689
12ms
5 Jan 2026
Kolakoski Constant
JOrE20
🥉
1,008
3ms
2 Jan 2026
Kolakoski Constant
HumanoidCPU
1,011
5ms
1 Jan 2026
Kolakoski Constant
cros107
96
22ms
1 Jan 2026
Kolakoski Constant
JOrE20
1,009
1ms
29 Dec 2025
Kolakoski Constant
JayXon
💎
193
1,728ms
28 Dec 2025
Kolakoski Constant
emgordon154
🥈
201
1,702ms
28 Dec 2025
Kolakoski Constant
dokutan
752
412ms
27 Dec 2025
Kolakoski Constant
HumanoidCPU
542
898ms
27 Dec 2025
Kolakoski Constant
dokutan
383
2ms
26 Dec 2025
Kolakoski Constant
blaztoma
🥇
164
115ms
24 Dec 2025