In region sum Sudoku puzzles, when the minimum possible sum of digits in a region equals the maximum possible sum, the digits are forced to specific values; for example, in an 8x8 grid where digits range from 1-8, a region with four cells must sum to 10 (minimum 1+2+3+4) or 11 (minimum 1+2+3+5), which constrains the possible digit combinations and helps solve the puzzle through logical deduction.
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Daily Sudoku - 19 May 2026Added:
Hello and welcome to the Daily Gas for May 19th, 2026 called 10 Tastic by Clover.
Normal 8 by 8 Sudoku rules apply.
Along each blue line, the sum of the digits within each region must be equal.
So, what does that mean? Well, Clover actually gives us a for instance. These are just like normal region sum lines and she tells us that row one, column four plus row two, column four is equivalent to row one, column five. So, these two digits on this part of the region border. So, the a region is just another name for like a box, one of these thickly outlined regions, right? So, that is the box here. So, these two cells sum to this cell. In this case, these four cells would sum to these two cells. These two cells would sum to these four cells. So on and so forth throughout the grid.
And that's it. Those are the rules.
Let's just jump right into it.
>> [sighs] >> All right. So, with four digits, we have four places for four digits.
Four digits, the minimum sum 1 2 3 4 is 10. And actually in this set, we have low digits on the ends of the two cell segment. And why that's extremely interesting is because in this Sudoku, we only have up to eight. That means the maximum this can be is 10. So, if the minimum here is 10 and the maximum is 10, it must then be 10.
I guess hence the 10 Tastic.
This is also kind of a a 10 line at the same time.
Second we introduce five though, that makes it a little bit more complicated.
Though maybe not so much because again we're left with the same idea. Like here, let's just do this real quick cuz I'm realizing we can just resolve that.
But this does the same thing because the maximum that this can be is 11. And the minimum this can be 1 2 3 and 5 is also 11. So it has to be 11. So this must be eight. I think yep, this does the same exact thing. So this will be one and three.
And that is a three in the corner.
And from here seven I guess really the question is is how much higher can we go from seven? Uh the answer is we can only go up to eight. So if we can only go up to eight, then the minimum that's allowed here is is eight. So the minimum here is eight, the maximum is eight, so it must be then eight.
And with that we should just be good to uh to solve it, right? So seven here, three here. Of course we're always roped in a in a 6x6 or an 8x8, not necessarily in the columns but certainly in the rows given this structure.
So just making sure we're paying close enough attention.
One four here five here seven then for six, we actually don't have a six anywhere, so something else has got to give. We got four here and four here, which gives us four here.
That gets us four here.
Five then has to go here.
This is seven.
This must then be our first sixes of the set. This is six here and here and here.
And here and here. And here. That's actually all of our sixes. And then two just kind of jumping down the line here.
Two and then this is four.
Sorry, I'm missing the five here.
Four five five here.
Seven here.
This is four.
And then three and five and four. And we're done in 3 minutes and 24 seconds with 10 tastic by Clover.
So, with that, hopefully you enjoyed.
And thank you for watching.
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