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
Continued Fractions
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
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
><>
ALGOL 68
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
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
><>
ALGOL 68
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
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
Continued Fractions
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
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
Sudoku
JOrE20
525
12ms
7 days ago
Sudoku
alexsave
1,094
1,290ms
3 Dec 2025
Sudoku
Lv0Sys
478
18ms
2 Dec 2025
Sudoku
madeforlosers
624
21ms
3 Nov 2025
Sudoku
CaedenHarper
665
23ms
31 Aug 2025
Sudoku
gigaprofisi
1,502
23ms
12 Aug 2025
Sudoku
acollett89
1,745
12ms
11 Jul 2025
Sudoku
sean-niemann
413
28ms
20 Feb 2025
Sudoku
Salutations45
536
23ms
27 Nov 2024
Sudoku
ovs-code
353
14ms
21 Nov 2024
Sudoku
LukeBridges
711
13ms
24 Sep 2024
Sudoku
helbling
482
14ms
12 Sep 2024
Sudoku
vlpx
🥉
340
20ms
18 Jun 2024
Sudoku
coreynash
699
25ms
1 Mar 2024
Sudoku
two-bad
583
14ms
25 Feb 2024
Sudoku
dmrichwa
384
65ms
31 Oct 2023
Sudoku
unfinishedprogram
1,037
43ms
27 Oct 2023
Sudoku
Larento
598
17ms
12 Oct 2023
Sudoku
Argeento
403
25ms
8 Sep 2023
Sudoku
una-ada
379
39ms
2 Sep 2023
Sudoku
voytxt
521
21ms
1 Sep 2023
Sudoku
stefangabos
937
10ms
20 Aug 2023
Sudoku
IchBinMichMarkus
783
12ms
18 Jul 2023
Sudoku
janbehrens
567
175ms
17 Jun 2023
Sudoku
JayXon
💎
314
20ms
21 May 2023
Sudoku
zakariamouhid
1,163
43ms
20 May 2023
Sudoku
emplv
🥈
326
46ms
18 May 2023
Sudoku
thisishowmymindworks
641
18ms
16 May 2023
Sudoku
ShiraJoseph
574
47ms
5 May 2023
Sudoku
CarsonChr
820
14ms
30 Apr 2023
Sudoku
tayloia
402
17ms
24 Mar 2023
Sudoku
jared-hughes
392
22ms
13 Feb 2023
Sudoku
rucin93
403
34ms
28 Nov 2022
Sudoku
KatieLG
626
17ms
21 Sep 2022
Sudoku
dgerblick
562
212ms
20 Sep 2022
Sudoku
GeorgeStechman
1,031
19ms
8 Sep 2022
Sudoku
BambooleanLogic
611
12ms
19 Aug 2022
Sudoku
itsh01
598
16ms
10 Jul 2022
Sudoku
KatieLG-Transpiler
2,807
14ms
2 Jul 2022
Sudoku
Irratix
375
13ms
16 May 2022
Sudoku
uttumuttu
443
16ms
21 Mar 2022
Sudoku
didion0
508
13ms
18 Feb 2022
Sudoku
MeWhenI
589
17ms
24 Sep 2021
Sudoku
prplz
404
47ms
27 Apr 2021
Sudoku
primo-ppcg
368
16ms
19 Oct 2020
Sudoku
tomtheisen
393
14ms
17 Oct 2020
Sudoku
dsntzn
938
17ms
4 Oct 2020
Sudoku
tomh1012
566
18ms
25 Sep 2020
Sudoku
proton
1,264
53ms
20 Jun 2020
Sudoku
dijs
950
11ms
26 Dec 2019
Sudoku
elisherer
1,531
16ms
11 Dec 2019
Sudoku
frobinsonj
587
15ms
21 Aug 2019
Sudoku
lukasmoellerch
623
53ms
18 Jul 2019
Sudoku
rambox11
723
14ms
23 Nov 2018