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
Bytes
Time
Submitted
Kolakoski Sequence
DialFrost
104
9ms
21 hours ago
Kolakoski Sequence
mwarvik
2,018
389ms
31 hours ago
Kolakoski Sequence
IISResetMe
81
253ms
35 hours ago
Kolakoski Sequence
KasperKivimaeki
57
11ms
3 days ago
Kolakoski Sequence
solisolu
86
2ms
4 days ago
Kolakoski Sequence
solisolu
60
12ms
4 days ago
Kolakoski Sequence
HumanoidCPU
2,008
7ms
4 days ago
Kolakoski Sequence
cros107
57
11ms
5 days ago
Kolakoski Sequence
JOrE20
83
10ms
7 days ago
Kolakoski Sequence
JOrE20
86
13ms
7 days ago
Kolakoski Sequence
dokutan
240
412ms
9 days ago
Kolakoski Sequence
HumanoidCPU
170
4ms
14 days ago
Kolakoski Sequence
sisyphus-ppcg
💎
41
4,880ms
14 days ago
Kolakoski Sequence
jkelly467
70
2,630ms
14 days ago
Kolakoski Sequence
TheZwierzLF
79
128ms
15 days ago
Kolakoski Sequence
xsot
🥈
53
849ms
16 days ago
Kolakoski Sequence
JOrE20
2,022
123ms
19 days ago
Kolakoski Sequence
strogor
140
1,016ms
20 days ago
Kolakoski Sequence
aadenboy
86
2ms
20 days ago
Kolakoski Sequence
ravnskjaer
192
352ms
22 days ago
Kolakoski Sequence
edsrzf
99
36ms
23 days ago
Kolakoski Sequence
dokutan
205
69ms
24 days ago
Kolakoski Sequence
dokutan
310
1,409ms
24 days ago
Kolakoski Sequence
dokutan
🥉
219
94ms
24 days ago
Kolakoski Sequence
Maashau
2,016
2ms
25 days ago
Kolakoski Sequence
error256
🥉
72
62ms
25 days ago
Kolakoski Sequence
luuumine
146
128ms
27 days ago
Kolakoski Sequence
snoozingnewt
89
118ms
27 days ago
Kolakoski Sequence
CaedenHarper
57
447ms
27 days ago
Kolakoski Sequence
CaedenHarper
57
11ms
27 days ago
Kolakoski Sequence
GrayJoKing
🥇
70
62ms
27 days ago
Kolakoski Sequence
Kacarott
🥇
70
60ms
9 Dec 2025
Kolakoski Sequence
namelessiw
23
140ms
8 Dec 2025
Kolakoski Sequence
kmathis22
114
468ms
7 Dec 2025
Kolakoski Sequence
Shanethegamer
2,003
2ms
6 Dec 2025
Kolakoski Sequence
HumanoidCPU
2,003
2ms
6 Dec 2025
Kolakoski Sequence
Andrey2001
82
11ms
6 Dec 2025
Kolakoski Sequence
canissimia
🥇
44
2ms
6 Dec 2025
Kolakoski Sequence
dokutan
222
731ms
5 Dec 2025
Kolakoski Sequence
snoozingnewt
💎
102
115ms
5 Dec 2025
Kolakoski Sequence
Lv0Sys
60
42ms
4 Dec 2025
Kolakoski Sequence
Lv0Sys
86
15ms
4 Dec 2025
Kolakoski Sequence
Lv0Sys
64
10ms
4 Dec 2025
Kolakoski Sequence
Shanethegamer
1,034
101ms
4 Dec 2025
Kolakoski Sequence
emgordon154
🥈
107
101ms
4 Dec 2025
Kolakoski Sequence
HumanoidCPU
2,113
11ms
4 Dec 2025
Kolakoski Sequence
dokutan
192
2ms
3 Dec 2025
Kolakoski Sequence
CaedenHarper
2,022
107ms
1 Dec 2025
Kolakoski Sequence
snoozingnewt
58
20ms
1 Dec 2025
Kolakoski Sequence
snoozingnewt
58
419ms
1 Dec 2025
Kolakoski Sequence
ScottHamper
90
446ms
30 Nov 2025
Kolakoski Sequence
KatieLG
343
1,258ms
30 Nov 2025
Kolakoski Sequence
KatieLG
341
105ms
30 Nov 2025
Kolakoski Sequence
KatieLG
303
14ms
30 Nov 2025
Kolakoski Sequence
KatieLG
337
126ms
30 Nov 2025
Kolakoski Sequence
KatieLG
336
625ms
30 Nov 2025
Kolakoski Sequence
KatieLG
312
159ms
30 Nov 2025
Kolakoski Sequence
KatieLG
351
285ms
30 Nov 2025
Kolakoski Sequence
KatieLG
384
70ms
30 Nov 2025
Kolakoski Sequence
KatieLG
354
201ms
30 Nov 2025
Kolakoski Sequence
KatieLG
289
3ms
30 Nov 2025
Kolakoski Sequence
KatieLG
364
5ms
30 Nov 2025
Kolakoski Sequence
KatieLG
337
3,082ms
30 Nov 2025
Kolakoski Sequence
KatieLG
371
392ms
30 Nov 2025
Kolakoski Sequence
KatieLG
367
120ms
30 Nov 2025
Kolakoski Sequence
KatieLG
385
23ms
30 Nov 2025
Kolakoski Sequence
KatieLG
397
1ms
30 Nov 2025
Kolakoski Sequence
KatieLG
370
131ms
30 Nov 2025
Kolakoski Sequence
h3ra993huskp
137
484ms
30 Nov 2025
Kolakoski Sequence
albanian-laundromat
98
39ms
28 Nov 2025
Kolakoski Sequence
AidanWalter
404
10ms
28 Nov 2025
Kolakoski Sequence
KasperKivimaeki
88
54ms
27 Nov 2025
Kolakoski Sequence
Code-Coder-coder
64
11ms
25 Nov 2025
Kolakoski Sequence
Carlos-EAC
2,008
10ms
24 Nov 2025
Kolakoski Sequence
Carlos-EAC
2,043
973ms
24 Nov 2025
Kolakoski Sequence
CornerMercury
58
30ms
24 Nov 2025
Kolakoski Sequence
TheZwierzLF
93
70ms
23 Nov 2025
Kolakoski Sequence
TheZwierzLF
91
634ms
23 Nov 2025
Kolakoski Sequence
blaztoma
44
3ms
22 Nov 2025
Kolakoski Sequence
JOrE20
338
8ms
22 Nov 2025