The New Sudoku Players' Forum

[koushanejad74]

Sudoku Arrow is similar to traditional Sudoku with one additional rule:

Numbers in each arrow must be strictly increasing in the direction of the arrow.

In other words, if number "X" appears in an arrow, the numbers appearing after "X", must be greater than "X"; similarly
the numbers appearing before "X", must be smaller than "X".

You can construct a lot of rules, for examples number "9" cannot appear in the middle or beginning of
an arrow and number "1" cannot appear in the middle or the end of an arrow.

Here some youtube videos explaining it:

https://youtu.be/mUDVgSm1HjQ
https://youtu.be/oJ9359S9tYY
https://youtu.be/2i8HmMLHS3o
https://youtu.be/yLEjzuOH40c

SudokuArrow.png (11.16 KiB) Viewed 888 times

[999_Springs]

this is the same concept as greater than/less than sudoku, where the less than symbols are your arrows pointing from one cell to the next one in the arrow. it's been around for a long time

also i think your puzzle has 3 solutions

Code: Select all

238176594
649...713
751349826
974..1638
586793241
123684957
497.1.362
865432179
312967485

[koushanejad74]

Yes, it is the same concept as greater than/less than sudoku, it's just a bit more elegant
And I need to fix my algorithms to have a unique solution

[SCLT]

In the world of competitive Sudoku, this variant is known as Thermo Sudoku, or Thermometer Sudoku.

You will find lots of examples by searching for those terms. For example https://www.gmpuzzles.com/blog/category ... mo-sudoku/ for starters.

[Wecoc]

This is a bit confusing because Arrow Sudoku and Thermo Sudoku are well-known variants that often appear in competitions, and what you are defining here is basically a Thermo Sudoku, as SCLT already said.