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
Sudoku (Fill-in)
Flekay
832
15ms
15 hours ago
Sudoku (Fill-in)
plcc0
248
281ms
9 Jan 2026
Sudoku (Fill-in)
dokutan
724
16ms
27 Dec 2025
Sudoku (Fill-in)
TheZwierzLF
554
73ms
25 Dec 2025
Sudoku (Fill-in)
blaztoma
244
33ms
17 Dec 2025
Sudoku (Fill-in)
bzijlema
178
164ms
16 Dec 2025
Sudoku (Fill-in)
MeWhenI
196
347ms
12 Dec 2025
Sudoku (Fill-in)
Lv0Sys
691
25ms
5 Dec 2025
Sudoku (Fill-in)
snoozingnewt
271
54ms
1 Dec 2025
Sudoku (Fill-in)
CornerMercury
238
67ms
1 Dec 2025
Sudoku (Fill-in)
AidanWalter
2,614
179ms
28 Nov 2025
Sudoku (Fill-in)
ndren
343
117ms
26 Nov 2025
Sudoku (Fill-in)
ryyyn
174
191ms
1 Nov 2025
Sudoku (Fill-in)
Babafaba
413
921ms
26 Oct 2025
Sudoku (Fill-in)
albanian-laundromat
235
42ms
19 Oct 2025
Sudoku (Fill-in)
BREMAUCY
327
308ms
4 Oct 2025
Sudoku (Fill-in)
emgordon154
192
3,623ms
2 Oct 2025
Sudoku (Fill-in)
qpwoeirut
287
21ms
21 Sep 2025
Sudoku (Fill-in)
InigoK
297
1,950ms
18 Sep 2025
Sudoku (Fill-in)
CaedenHarper
310
65ms
15 Sep 2025
Sudoku (Fill-in)
cros107
215
1,408ms
8 Sep 2025
Sudoku (Fill-in)
HumanoidCPU
782
13ms
6 Sep 2025
Sudoku (Fill-in)
sean-niemann
189
45ms
26 Aug 2025
Sudoku (Fill-in)
Zhenyu-Bo
2,240
21ms
1 Aug 2025
Sudoku (Fill-in)
anter69
276
1,570ms
10 Jul 2025
Sudoku (Fill-in)
evan18c
3,386
22ms
18 Apr 2025
Sudoku (Fill-in)
Keegan-T
1,457
13ms
18 Apr 2025
Sudoku (Fill-in)
mbittner20
610
261ms
14 Apr 2025
Sudoku (Fill-in)
madex
405
33ms
21 Mar 2025
Sudoku (Fill-in)
zt14427
4,693
19ms
18 Mar 2025
Sudoku (Fill-in)
jameswmccarty
1,521
20ms
13 Mar 2025
Sudoku (Fill-in)
ahmetdemirag
245
116ms
4 Mar 2025
Sudoku (Fill-in)
ovs-code
170
47ms
9 Feb 2025
Sudoku (Fill-in)
ComputerKWasTaken
1,007
16ms
23 Jan 2025
Sudoku (Fill-in)
croc54
358
795ms
18 Jan 2025
Sudoku (Fill-in)
theadamabrams
784
86ms
28 Nov 2024
Sudoku (Fill-in)
wh3n3v3r
430
69ms
18 Nov 2024
Sudoku (Fill-in)
lifthrasiir
240
67ms
16 Nov 2024
Sudoku (Fill-in)
Natanaelel
240
18ms
11 Nov 2024
Sudoku (Fill-in)
xyangst
760
21ms
12 Oct 2024
Sudoku (Fill-in)
JesseNoEyes
1,298
22ms
20 Sep 2024
Sudoku (Fill-in)
jatloe
193
194ms
16 Sep 2024
Sudoku (Fill-in)
Rubiksmath
188
408ms
2 Sep 2024
Sudoku (Fill-in)
kg583
225
337ms
9 Jun 2024
Sudoku (Fill-in)
pardouin
170
52ms
9 Jun 2024
Sudoku (Fill-in)
Yewzir
1,084
3,235ms
1 Jun 2024
Sudoku (Fill-in)
jtaxen
3,085
25ms
10 May 2024
Sudoku (Fill-in)
Steffan153
183
33ms
4 Apr 2024
Sudoku (Fill-in)
AlephSquirrel
316
85ms
30 Mar 2024
Sudoku (Fill-in)
duckyluuk
230
95ms
22 Mar 2024
Sudoku (Fill-in)
davecame
269
615ms
20 Mar 2024
Sudoku (Fill-in)
5cw
🥉
164
86ms
11 Mar 2024
Sudoku (Fill-in)
mathisfun271
470
20ms
6 Mar 2024
Sudoku (Fill-in)
DialFrost
221
1,556ms
14 Feb 2024
Sudoku (Fill-in)
rsgray
468
628ms
7 Feb 2024
Sudoku (Fill-in)
neel11235813
294
76ms
12 Jan 2024
Sudoku (Fill-in)
yuchuehw
769
16ms
9 Jan 2024
Sudoku (Fill-in)
commandz0
358
53ms
31 Oct 2023
Sudoku (Fill-in)
StefanHabel
297
17ms
4 Sep 2023
Sudoku (Fill-in)
SB-945
277
366ms
31 Aug 2023
Sudoku (Fill-in)
stefangimmillaro
217
817ms
17 Aug 2023
Sudoku (Fill-in)
FortuiteMan
357
82ms
6 Aug 2023
Sudoku (Fill-in)
bizy-coder
188
93ms
4 Aug 2023
Sudoku (Fill-in)
AlexanderFair
270
266ms
31 Jul 2023
Sudoku (Fill-in)
msbranicky
746
18ms
26 Jul 2023
Sudoku (Fill-in)
janbehrens
443
481ms
17 Jun 2023
Sudoku (Fill-in)
TaserTheFox
428
715ms
23 May 2023
Sudoku (Fill-in)
eiburns
441
43ms
10 May 2023
Sudoku (Fill-in)
adamnielson42
263
103ms
25 Apr 2023
Sudoku (Fill-in)
galloj
634
20ms
24 Feb 2023
Sudoku (Fill-in)
aksyristos
782
43ms
27 Jan 2023
Sudoku (Fill-in)
scpchicken
300
87ms
7 Jan 2023
Sudoku (Fill-in)
prplz
225
1,190ms
6 Jan 2023
Sudoku (Fill-in)
za3k
1,109
185ms
14 Dec 2022
Sudoku (Fill-in)
QuincyNash
591
1,912ms
4 Dec 2022
Sudoku (Fill-in)
jakobkordez
306
138ms
2 Nov 2022
Sudoku (Fill-in)
bricknellj
178
37ms
2 Nov 2022
Sudoku (Fill-in)
ValentinCassayre
620
261ms
19 Oct 2022
Sudoku (Fill-in)
atazzam
2,260
147ms
18 Oct 2022
Sudoku (Fill-in)
FlorianCassayre
449
314ms
17 Oct 2022