${DynamicText("About this genre (loading...)")}
| :info: Maki Kaji, the Father of Sudoku, renamed this genre (Number Place was the original name) and eventually popularised it in the 1980s, through regular [Nikoli Publications|https://nikoli.co.jp] that continue to this day.
Nowadays, the world of Sudoku is deep and friendly communities gather around it, notably [Cracking the Cryptic|https://crackingthecryptic.com/].
General and specialised tools abound, e.g.:
- @SvenNeumann's [Sudoku Pad|https://sudokupad.app]
- @Sirxemic's [Sudokumaker|https://sudokumaker.app]
- [f-puzzles|https://f-puzzles.com/] (formerly maintained by @EricFox)
- @Swaroop's [Penpa Plus|https://sudokumaker.app] (general tool, among others listed at the [Paper Puzzle Masterlist])
This [Sudoku] implementation is smaller in scope. However, it adds a few twists to the base genre:
- regions of any size (possibly mixed in the same puzzle)
- irregular region borders
- absent tiles (which do not block the line of sight)
- hexagonal grid support (via the ´´hex´´ variant)
In addition, the [Kudamono Variant System|../variants] provides the following variants:
VARIANT MEANING
[´´math´´|§math] adds math symbols, which, together with the placed numbers, must form valid equations
[´´kropki´´|§kropki] adds kropki symbols: a white dot indicates adjacent numbers are consecutive, while a black dot indicates they are at a 2:1 ratio
[´´kropki-total´´|§kropki-total] all kropki symbols are given (negative constraint)
[´´antiking´´|§antiking] no two numbers adjacent by a chess king's move may be equal
[´´antiknight´´|§antiknight] no two numbers adjacent by a chess knight's move may be equal
§:=paper-puzzle-player.html?W=9x9&G=sudoku&V=
As more variants are added in the future, those that are well-suited to [Sudoku] will be (re)listed in this page.
## Classic [sudoku] puzzles
### site.author
This classic sudoku uses non-square regions, of size 6.
W=6x6&L=(1)5(2)4(4)2(3)2(5)2(5)5(2)2(6)2(3)2(1)4&SIE=2RRRRRR2RRRRRR17UUUUUU&G=sudoku&A=Pedro&D=2024-01-29&F=1&T=6doku
### @PinkHoodie
W=6x6&L=(5)0(6)5(4)2(5)7(3)1(6)6(3)4(1)3(4)2(2)5&LF=(2)1(4)1(1)1(3)1(3)2(6)2(2)1(5)1(1)1(1)1(6)1(2)3(4)1(2)1(5)1(1)1(4)2(3)1(6)1(2)2(4)1(5)2(1)2(3)1(5)1(6)1&SIE=2RRRRRR2RRRRRR17UUUUUU&G=sudoku&A=PinkHoodie&D=2024-07-16&F=2&T=Sky_Stamp
W=6x6&L=(1)5(4)4(2)1(5)4(3)2(3)2(1)3(1)4(5)5(2)2&LF=(4)0(5)1(3)1(2)1(6)1(6)2(3)1(1)1(5)3(1)1(2)1(6)2(4)2(6)2(4)1(5)2(2)1(2)1(6)2(5)1(4)1(3)1(4)2(3)2(1)1(6)1&SIE=2RRRUURRRUU2RRRUU17UURRRDDLLLLLL23UU&G=sudoku&A=PinkHoodie&D=2024-11-25&F=3&O=PuzSq_Advent_2024&T=Inject
W=6x6&L=(5)0(6)1(1)3(2)5(5)2(4)8(5)2(3)7(1)1(3)1(6)2&LF=(4)2(3)1(2)2(6)1(1)1(3)1(4)2(1)2(3)1(2)1(4)1(5)1(6)1(2)1(1)2(6)2(3)1(4)1(2)1(5)1(6)1(5)4(1)2(2)1(4)1&SIE=2RUUURRU8RURRDLDLDLL13RRDLLD9URU5UUR&G=sudoku&A=PinkHoodie&D=2024-11-27&F=1&O=PuzSq_Advent_2024&T=Paralleled_Sudoku
W=5x5&LF=(2)0(1)2(3)1(4)1(3)2(4)1(2)1(3)2(4)3(1)1(4)1(1)1(2)3(4)2(2)1(1)1(3)1&L=x1(1)4x4(2)2x1(3)5x1x2&SIE=8URU4UU8RD8R&G=sudoku&A=PinkHoodie&D=2024-01-31&F=2&T=Absent_Minded
W=7x7&LF=(3)0(2)1(1)1(5)2(4)2(4)2(1)2(3)1(2)1(5)1(1)1(5)1(2)1(3)3(2)2(3)2(5)1(4)1(3)4(4)4(1)1(4)1(5)2(1)2(2)2(1)2(4)1(2)1(5)2(3)1&L=x3x2x2x2(4)8x1x2x2(1)4x1(5)1x2x1(2)1x4(3)2x2x2x4&SIE=5RR12R1RUU11RR8UU7R&G=sudoku&A=PinkHoodie&D=2024-02-01&F=2&T=Absent_Fiveded
This is a cleverly constructed puzzle whose absent cells cannot be filled:
W=8x8&LF=(4)1(7)1(5)1(1)1(6)1(3)1(6)2(3)2(2)1(5)1(1)2(4)1(5)1(2)1(1)1(7)1(4)2(3)2(2)1(6)1(3)3(1)1(7)1(7)3(6)1(3)1(5)2(1)2(1)1(5)2(7)2(2)1(4)1(6)1(3)1(1)1(6)2(4)1(5)2(7)1(5)2(4)1(6)2(3)1(2)1&L=x0(2)7x2(7)4x7(6)2x4(4)1(5)4(4)1(2)4x2(3)3x2(2)7x3(7)3(1)3x4&SIE=3RRR2RDR18UUU2RR2UU4RRUU28DRDR1UU14LDLLLURU&G=sudoku&A=PinkHoodie&D=2024-02-01&F=2&T=No_Way_to_Make_8
### @JustKirb
@JustKirb filled in the absent tiles in the //Absent minded// puzzle by @PinkHoodie, and added one clue, yielding a new remixed puzzle...
W=5x5&L=(1)5(2)6(3)6(4)3&SIE=1RUURULU11UURRDR8UL1URR&G=sudoku&A=justkirb&D=2024-01-31&F=2&N=1&O=modified_from_Absent_minded_by_PinkHoodie&T=Absent_Minded_(remixed)
## Variants
### ´´hex´´
V=hex
This one is set on the ´´hex´´ grid, which contains one extra row direction. For some region sizes, removing tiles from the grid is needed.
W=4x4x4&L=x4(1)1(3)8x1x1x2x1x1x2x1x10(2)2&SIE=7EU3RER3ERE11E26U3RER11R1ERE20LU&V=hex&G=sudoku&A=Pedro&D=2024-01-28&F=1&T=Sudokex
### ´´math´´
V=math
W=10x9&L=x0x1x1x1(2)1(1)1x1x1x1x1x1x7x1x1x7x5x1x3x3x1x1x1x1x5x1x1x1x1x3x3x1x5x7x1x1x7x1x1x1x1(2)1x2x1x1x1&L-MATH=l13g8l1l6g2l1g5l1g2l1l4g1g3g4l1l7g8g9l6l9g8g7l1l4l3g1g4l1g2l1g5l1g2g6l1g8&LF=(3)11(1)1(5)1(6)1(2)1(4)1(2)4(6)1(3)1(4)1(5)1(1)1(2)2(1)1(5)1(4)1(3)3(6)1(5)2(6)1(3)6(4)1(3)1(4)1(5)6(1)1(5)2(1)1(3)3(4)1(2)1(6)1(2)2(6)1(3)1(4)1(5)1(1)1(3)4(4)1(5)1(1)1(2)1(6)1(6)7&SIE=6RRRDDLLL10UURRRDDL16DD10LLLUU5RRRUU1U13RRRUUR1LLUUL11LDDD2LUU18LLUURRUULL2R&G=sudoku&V=math&A=PinkHoodie&D=2024-11-25&F=3&O=PuzSq_Advent_2024_Make_a_Variant_1.2_(Expanded+Fortress)&T=Maximal_Expansion
W=6x6&L-MATH=e1p1e8e1p1e7p1p1p6e1p2e1p1p6p1e10p9e1&LF=(4)0(3)1(1)1(2)1(5)1(6)1(5)1(1)1(4)1(6)1(2)1(3)1(2)1(6)1(3)1(5)1(4)1(1)1(3)1(4)1(5)1(1)1(6)1(2)1(1)1(2)1(6)1(4)1(3)1(5)1(6)1(5)1(2)1(3)1(1)1(4)1&SIE=2RRRRRR2RRRUU17UUUURRR&G=sudoku&V=math&A=PinkHoodie&D=2024-06-14&F=3&O=Math&T=Arrow_Sudoku&U=tinyurl.com/2db65zpa
W=6x6&L-MATH=l10l4l1l1l3l8l3l8l11g2l1g3l2&LF=(6)0(4)1(2)1(3)1(5)1(1)1(1)1(5)1(6)1(4)1(3)1(2)1(2)1(3)1(1)1(5)1(4)1(6)1(3)1(1)1(4)1(6)1(2)1(5)1(4)1(2)1(5)1(1)1(6)1(3)1(5)1(6)1(3)1(2)1(1)1(4)1&SIE=2RRRRRR2RRRRRR17UUUUUU&G=sudoku&V=math&A=PinkHoodie&D=2024-06-14&F=1&O=Math&T=Thermo_Sudoku&U=tinyurl.com/2dbtjq2k
### ´´obstacle´´
V=obstacle
W=6x6&L=(2)1(6)2(4)2x3x11(1)1x3(4)1x3(3)2x1x3&L-OBST=v8v11v4v4v3v3&LF=(1)0(5)2(3)2(2)2(1)1(1)2(5)1(2)1(3)1(4)1(5)1(2)1(6)1(1)1(5)1(3)3(4)1(1)3(2)1(1)2(2)3(3)1(2)2(1)1&SIE=1RRD3R13LUR4URURUR1UR17LLDDLUUURRU7LUU&G=sudoku&V=obstacle&A=PinkHoodie&D=2024-11-21&F=2&O=Obstacle&T=Blocked_Sight_Sudoku
### ´´obstacle,antiknight´´
V=obstacle,antiknight
W=12x2&L=(3)0x3x5x3x5x3(2)3&L-OBST=v3v5v3v5v3&LF=(1)1(2)1(4)2(2)1(1)1(3)1(1)2(2)1(3)2(1)1(1)1(3)1(2)2(4)1(1)2(3)1(1)2&SIE=6U7U8UU16LU&G=sudoku&V=obstacle,antiknight&A=PinkHoodie&D=2024-12-07&F=2&O=(PuzSq_Advent_2024_(Size_Series))_Obstacle_+_Antiknight&T=12x2_(Size_Series)
## Acknowledgements and Changes
**2024-01-31** @PinkHoodie made good use of absent tiles in the newly sent puzzle!
**2024-02-01** Variant panels for ´´antiking´´ and ´´antiknight´´ ([sudoku]) were crafted by @PinkHoodie - thank you!
**2024-02-01** :::puzzletters @PinkHoodie sent a 7x7 with absent cells, @JustKirb remixed the previous 5x5, and @PinkHoodie constructed a clever 8x8 that cannot be remixed in that way.
**2024-06-15** :::puzzletters @PinkHoodie sent 2 puzzles using variant ´´math´´!
**2024-07-19** :::puzzletters @PinkHoodie sent 1 classic - thank you!
**2024-11-23** :::puzzletters The first ´´obstacle´´ variant [sudoku] was crafted by @PinkHoodie!
**2024-12-07** :::puzzletters @PinkHoodie constructed 2 [sudoku] puzzles using variants ´´math´´ and ´´obstacle,antiknight´´ plus 2 [sudoku] (classic) puzzles! Minor page reorganisation.