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
Bytes
Time
Submitted
QR Decoder
nemoyatpeace
282
18ms
12 Jan 2026
QR Decoder
TheZwierzLF
320
11ms
6 Jan 2026
QR Decoder
blaztoma
157
16ms
28 Dec 2025
QR Decoder
edsrzf
171
24ms
16 Dec 2025
QR Decoder
ryyyn
163
18ms
9 Dec 2025
QR Decoder
snoozingnewt
199
17ms
6 Dec 2025
QR Decoder
Lv0Sys
336
19ms
5 Dec 2025
QR Decoder
JOrE20
279
10ms
2 Dec 2025
QR Decoder
CornerMercury
216
16ms
1 Dec 2025
QR Decoder
AidanWalter
2,289
13ms
28 Nov 2025
QR Decoder
Seek64
170
10ms
27 Nov 2025
QR Decoder
qpwoeirut
297
18ms
24 Nov 2025
QR Decoder
te-chnical
260
23ms
18 Nov 2025
QR Decoder
Babafaba
249
16ms
29 Oct 2025
QR Decoder
emgordon154
198
9ms
16 Oct 2025
QR Decoder
InigoK
214
18ms
22 Sep 2025
QR Decoder
dokutan
243
17ms
9 Sep 2025
QR Decoder
robin-scragg
266
18ms
27 Aug 2025
QR Decoder
BREMAUCY
221
18ms
22 Aug 2025
QR Decoder
CaedenHarper
240
11ms
10 Aug 2025
QR Decoder
RaBa21
255
16ms
31 Jul 2025
QR Decoder
Flekay
356
17ms
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
17ms
28 Jun 2025
QR Decoder
andrewjc2000
216
28ms
15 May 2025
QR Decoder
Pyroan
377
9ms
16 Apr 2025
QR Decoder
bricknellj
166
19ms
3 Apr 2025
QR Decoder
sean-niemann
165
19ms
9 Mar 2025
QR Decoder
CLOStrophobic
486
11ms
10 Feb 2025
QR Decoder
croc54
475
11ms
30 Jan 2025
QR Decoder
Artemis21
212
18ms
3 Jan 2025
QR Decoder
janbehrens
247
10ms
4 Dec 2024
QR Decoder
aksyristos
515
11ms
17 Nov 2024
QR Decoder
lifthrasiir
190
17ms
16 Nov 2024
QR Decoder
wh3n3v3r
264
18ms
14 Nov 2024
QR Decoder
madex
405
10ms
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
10ms
7 Jul 2024
QR Decoder
KrausRaus
369
17ms
4 Jul 2024
QR Decoder
duckyluuk
197
19ms
23 Jun 2024
QR Decoder
jtaxen
543
11ms
19 May 2024
QR Decoder
pardouin
154
19ms
16 May 2024
QR Decoder
5cw
164
10ms
8 May 2024
QR Decoder
roupiq
380
10ms
19 Apr 2024
QR Decoder
StefanHabel
208
10ms
8 Apr 2024
QR Decoder
neel11235813
219
19ms
1 Apr 2024
QR Decoder
davecame
236
20ms
19 Mar 2024
QR Decoder
SB-945
265
9ms
14 Mar 2024
QR Decoder
CatsAreFluffy
263
17ms
17 Feb 2024
QR Decoder
ridingqwerty
267
16ms
14 Feb 2024
QR Decoder
mathisfun271
215
11ms
12 Feb 2024
QR Decoder
SirBogman
172
15ms
31 Jan 2024
QR Decoder
kg583
189
17ms
31 Jan 2024
QR Decoder
cros107
255
11ms
28 Jan 2024
QR Decoder
rucin93
250
16ms
21 Jan 2024
QR Decoder
DialFrost
221
18ms
18 Jan 2024
QR Decoder
MarcMush
261
17ms
14 Jan 2024
QR Decoder
prplz
179
11ms
13 Jan 2024
QR Decoder
yuchuehw
338
16ms
5 Jan 2024
QR Decoder
adamnielson42
286
15ms
29 Nov 2023
QR Decoder
ndren
219
26ms
22 Nov 2023
QR Decoder
camieac
403
10ms
22 Nov 2023
QR Decoder
cpchrispye
1,504
14ms
13 Nov 2023
QR Decoder
raspofabs
319
19ms
12 Nov 2023
QR Decoder
m42km
238
23ms
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
11ms
21 Oct 2023
QR Decoder
scpchicken
229
17ms
13 Oct 2023
QR Decoder
commandz0
242
11ms
27 Sep 2023
QR Decoder
RYNO8
262
18ms
4 Sep 2023
QR Decoder
msbranicky
310
18ms
12 Aug 2023
QR Decoder
stefangimmillaro
190
24ms
8 Aug 2023
QR Decoder
mbittner20
339
10ms
3 Jul 2023
QR Decoder
AlephSquirrel
166
16ms
10 Jun 2023
QR Decoder
TaserTheFox
351
16ms
19 May 2023