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
Chars
Time
Submitted
Sudoku
dokutan
409
70ms
11 hours ago
Sudoku
elgan65536
653
330ms
38 hours ago
Sudoku
RobertHoeh
1,045
3,358ms
9 days ago
Sudoku
blaztoma
🥈
509
143ms
12 days ago
Sudoku
amazingalek
1,170
456ms
15 days ago
Sudoku
ovs-code
🥉
276
2,704ms
15 days ago
Sudoku
bitsandbeyond
💎
151
1,453ms
20 days ago
Sudoku
zhaohm14
435
25ms
23 days ago
Sudoku
snoozingnewt
💎
499
136ms
24 days ago
Sudoku
blaztoma
449
114ms
11 Jan 2026
Sudoku
MiffOttah
623
549ms
9 Jan 2026
Sudoku
dokutan
944
87ms
27 Dec 2025
Sudoku
dokutan
💎
461
29ms
27 Dec 2025
Sudoku
emgordon154
341
50ms
26 Dec 2025
Sudoku
acotis
🥈
459
248ms
24 Dec 2025
Sudoku
canissimia
💎
260
4,643ms
19 Dec 2025
Sudoku
kmathis22
647
567ms
18 Dec 2025
Sudoku
kurkale6ka
841
29ms
15 Dec 2025
Sudoku
CornerMercury
213
29ms
14 Dec 2025
Sudoku
ryyyn
362
332ms
3 Dec 2025
Sudoku
alexsave
805
12ms
3 Dec 2025
Sudoku
dokutan
401
202ms
3 Dec 2025
Sudoku
dokutan
401
509ms
3 Dec 2025
Sudoku
Lv0Sys
436
15ms
2 Dec 2025
Sudoku
JOrE20
752
13ms
2 Dec 2025
Sudoku
Lv0Sys
546
20ms
2 Dec 2025
Sudoku
h3ra993huskp
774
851ms
30 Nov 2025
Sudoku
snoozingnewt
💎
342
980ms
22 Nov 2025
Sudoku
KatieLG
🥉
617
463ms
21 Nov 2025
Sudoku
snoozingnewt
🥉
612
4,008ms
21 Nov 2025
Sudoku
snoozingnewt
283
460ms
20 Nov 2025
Sudoku
snoozingnewt
287
54ms
20 Nov 2025
Sudoku
targrik
🥉
515
39ms
19 Nov 2025
Sudoku
KasperKivimaeki
🥉
396
3,079ms
18 Nov 2025
Sudoku
Yax42
475
512ms
16 Nov 2025
Sudoku
MeWhenI
🥈
469
1,068ms
7 Nov 2025
Sudoku
albanian-laundromat
🥈
244
2,730ms
7 Nov 2025
Sudoku
lynn
🥉
484
228ms
6 Nov 2025
Sudoku
Natanaelel
382
11ms
5 Nov 2025
Sudoku
CaedenHarper
808
348ms
4 Nov 2025
Sudoku
madeforlosers
498
22ms
3 Nov 2025
Sudoku
robin-scragg
735
14ms
1 Nov 2025
Sudoku
CaedenHarper
440
1,046ms
31 Oct 2025
Sudoku
CaedenHarper
456
83ms
31 Oct 2025
Sudoku
Babafaba
372
912ms
26 Oct 2025
Sudoku
Babafaba
376
1,629ms
26 Oct 2025
Sudoku
CaedenHarper
964
538ms
21 Oct 2025
Sudoku
albanian-laundromat
🦄
663
1,717ms
18 Oct 2025
Sudoku
CaedenHarper
989
763ms
8 Oct 2025
Sudoku
KatieLG
291
501ms
6 Oct 2025
Sudoku
BREMAUCY
553
19ms
4 Oct 2025
Sudoku
pardouin
152
620ms
3 Oct 2025
Sudoku
bzijlema
399
801ms
2 Oct 2025
Sudoku
CaedenHarper
🥉
501
4,554ms
27 Sep 2025
Sudoku
JayXon
💎
385
653ms
27 Sep 2025
Sudoku
edsrzf
💎
223
3,177ms
26 Sep 2025
Sudoku
sean-niemann
🥉
475
813ms
24 Sep 2025
Sudoku
KatieLG
648
540ms
24 Sep 2025
Sudoku
AlexKent3141
892
3ms
17 Sep 2025
Sudoku
albanian-laundromat
262
17ms
16 Sep 2025
Sudoku
albanian-laundromat
264
722ms
12 Sep 2025
Sudoku
cros107
430
409ms
7 Sep 2025
Sudoku
pardouin
318
1,840ms
6 Sep 2025
Sudoku
HumanoidCPU
356
438ms
6 Sep 2025
Sudoku
HumanoidCPU
360
12ms
6 Sep 2025
Sudoku
edsrzf
🥈
807
87ms
5 Sep 2025
Sudoku
commandz0
455
960ms
1 Sep 2025
Sudoku
CaedenHarper
623
18ms
31 Aug 2025
Sudoku
InigoK
286
105ms
29 Aug 2025
Sudoku
albanian-laundromat
💎
382
111ms
27 Aug 2025
Sudoku
KatieLG
1,744
147ms
25 Aug 2025
Sudoku
KatieLG
1,933
789ms
25 Aug 2025
Sudoku
muser-logiccpu
935
27ms
25 Aug 2025
Sudoku
emgordon154
💎
431
3,654ms
14 Aug 2025
Sudoku
namelessiw
412
512ms
14 Aug 2025
Sudoku
AdrienHache
435
539ms
13 Aug 2025
Sudoku
primo-ppcg
💎
863
20ms
13 Aug 2025
Sudoku
gigaprofisi
1,286
28ms
12 Aug 2025
Sudoku
Kacarott
🥈
502
209ms
8 Aug 2025
Sudoku
pardouin
🥈
437
3,638ms
5 Aug 2025