20x20 - 8x8 sum sudoku

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20x20 - 8x8 sum sudoku

Postby bhimz » Sun Sep 06, 2020 10:56 am

Hi all, I would like to request a feedback for this concept I've been working on.
This is another variant of sudoku I've been playing around; though current puzzles are not too hard, but it feels fun and solid enough. The premise of the game is simple: You are given an 8x8 grid, which you need to fill in with numbers between 1,2,3,4,6,7,8,9 (no 5). The rest is similar with regular sudoku: no repeating the same numbers across, vertically or in any surrounding cells... However there's one twist: each 2x2 group must add up to exactly 20.

A solved 20x20 puzzle will look like this:

Image

To try out the puzzle, I've made a web version of the game and uploaded a few puzzles; you can head over here to try: https://dwidasa-2e37f.web.app/
If you find the idea interesting, help me make it better and give me some feedbacks ;)
bhimz
 
Posts: 15
Joined: 16 November 2015

Re: 20x20 - 8x8 sum sudoku

Postby creint » Fri Sep 11, 2020 10:55 am

Here is an example generated with my solver. Medium difficulty, (locked set + x-wings or chains)
Code: Select all
. . . 4 . . . .
. . . 6 . . 1 9
. . . . . . . 8
9 . 1 . . . . .
. 7 . . . . 6 .
. . . . . 6 . .
. . . . 1 . 4 2
. 4 . . 3 . . .


On your app which does not work in my browser following puzzle has multiple solutions:
Code: Select all
0126370007080962269748300400027902008000083026071904000003020000

Found some more with multiple solutions..others are not minimal and very easy.

Level 4 can be reduced to this, difficulty: very hard.
Code: Select all
. . 6 . . 1 . .
. . . . . 4 . .
. . 1 . . 6 8 .
9 . . . . 2 1 .
. . . 9 . . . .
. 7 2 . . . . .
. 9 . 7 . . . .
. . . . . . 2 .
creint
 
Posts: 201
Joined: 20 January 2018


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