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
Bytes
Time
Submitted
QR Decoder
ryyyn
163
16ms
19 hours ago
QR Decoder
TheZwierzLF
335
13ms
2 days ago
QR Decoder
snoozingnewt
199
15ms
3 days ago
QR Decoder
Lv0Sys
336
21ms
5 days ago
QR Decoder
JOrE20
279
10ms
7 days ago
QR Decoder
CornerMercury
216
18ms
9 days ago
QR Decoder
AidanWalter
2,289
12ms
12 days ago
QR Decoder
Seek64
170
10ms
13 days ago
QR Decoder
qpwoeirut
297
18ms
15 days ago
QR Decoder
te-chnical
260
22ms
21 days ago
QR Decoder
blaztoma
214
16ms
21 days ago
QR Decoder
Babafaba
249
17ms
29 Oct 2025
QR Decoder
emgordon154
198
10ms
16 Oct 2025
QR Decoder
edsrzf
178
26ms
4 Oct 2025
QR Decoder
InigoK
214
16ms
22 Sep 2025
QR Decoder
dokutan
243
16ms
9 Sep 2025
QR Decoder
robin-scragg
266
17ms
27 Aug 2025
QR Decoder
BREMAUCY
221
16ms
22 Aug 2025
QR Decoder
CaedenHarper
240
11ms
10 Aug 2025
QR Decoder
RaBa21
255
16ms
31 Jul 2025
QR Decoder
Flekay
356
16ms
11 Jul 2025
QR Decoder
anter69
215
16ms
7 Jul 2025
QR Decoder
FortuiteMan
268
16ms
7 Jul 2025
QR Decoder
ovs-code
🥉
143
10ms
6 Jul 2025
QR Decoder
albanian-laundromat
268
18ms
28 Jun 2025
QR Decoder
andrewjc2000
216
27ms
15 May 2025
QR Decoder
Pyroan
377
10ms
16 Apr 2025
QR Decoder
bricknellj
166
16ms
3 Apr 2025
QR Decoder
sean-niemann
165
16ms
9 Mar 2025
QR Decoder
CLOStrophobic
486
9ms
10 Feb 2025
QR Decoder
croc54
475
9ms
30 Jan 2025
QR Decoder
Artemis21
212
16ms
3 Jan 2025
QR Decoder
janbehrens
247
10ms
4 Dec 2024
QR Decoder
aksyristos
515
9ms
17 Nov 2024
QR Decoder
lifthrasiir
190
18ms
16 Nov 2024
QR Decoder
wh3n3v3r
264
16ms
14 Nov 2024
QR Decoder
madex
405
11ms
24 Oct 2024
QR Decoder
alemelis
245
16ms
27 Aug 2024
QR Decoder
Steffan153
160
16ms
31 Jul 2024
QR Decoder
MeWhenI
156
9ms
30 Jul 2024
QR Decoder
KatieLG
222
9ms
7 Jul 2024
QR Decoder
KrausRaus
369
16ms
4 Jul 2024
QR Decoder
duckyluuk
197
17ms
23 Jun 2024
QR Decoder
jtaxen
543
10ms
19 May 2024
QR Decoder
pardouin
154
20ms
16 May 2024
QR Decoder
5cw
164
9ms
8 May 2024
QR Decoder
roupiq
380
10ms
19 Apr 2024
QR Decoder
StefanHabel
208
11ms
8 Apr 2024
QR Decoder
neel11235813
219
19ms
1 Apr 2024
QR Decoder
davecame
236
16ms
19 Mar 2024
QR Decoder
SB-945
265
10ms
14 Mar 2024
QR Decoder
CatsAreFluffy
263
17ms
17 Feb 2024
QR Decoder
ridingqwerty
267
16ms
14 Feb 2024
QR Decoder
mathisfun271
215
9ms
12 Feb 2024
QR Decoder
SirBogman
172
16ms
31 Jan 2024
QR Decoder
kg583
189
16ms
31 Jan 2024
QR Decoder
cros107
255
10ms
28 Jan 2024
QR Decoder
rucin93
250
16ms
21 Jan 2024
QR Decoder
DialFrost
221
18ms
18 Jan 2024
QR Decoder
MarcMush
261
16ms
14 Jan 2024
QR Decoder
prplz
179
9ms
13 Jan 2024
QR Decoder
yuchuehw
338
17ms
5 Jan 2024
QR Decoder
adamnielson42
286
14ms
29 Nov 2023
QR Decoder
ndren
219
25ms
22 Nov 2023
QR Decoder
camieac
403
9ms
22 Nov 2023
QR Decoder
cpchrispye
1,504
14ms
13 Nov 2023
QR Decoder
raspofabs
319
19ms
12 Nov 2023
QR Decoder
m42km
238
18ms
12 Nov 2023
QR Decoder
simon-thornton_pace
600
10ms
8 Nov 2023
QR Decoder
eiburns
380
10ms
27 Oct 2023
QR Decoder
FlorianCassayre
247
10ms
21 Oct 2023
QR Decoder
scpchicken
229
19ms
13 Oct 2023
QR Decoder
commandblockguy
242
10ms
27 Sep 2023
QR Decoder
RYNO8
262
17ms
4 Sep 2023
QR Decoder
msbranicky
310
16ms
12 Aug 2023