Fill in each box in the grid with the numbers 1 to 7 so that each number appears exactly once in each row and column. The clues tell the sum of the numbers in the squares. For example, A12 = 6 means that the numbers in A1 and A2 add up to 6.



A34 = 7
AB7 = 6
BC3 = 9
BC6 = 7
C45 = 8
D234 = 9
DE7 = 10
E123 = 8
EFG4 = 13
EFG5 = 7
G12 = 7
G67 = 5

Making my head spin!

Question (to make sure I've interpreted locations properly):
after entering the 12 clues in the grid, we can right away
identify 3 of the 49 locations as blanks, right?

Don't want to say which 3, in case you scold me for
giving clues!! But I will if you say it's ok.

Logically, as the grid is 7 x 7, the numbers 0 - 6 must appear in each row/column (so 13 zeroes - what Denis refers to as blanks, rather than 3), but I do not think that the clues necessarily help identify the "empty" spaces straight away.

I am quite keen on sudoku and better yet, futoshiki, but I have not yet applied myself to this puzzle.

Yes they do; like, if the clues place some value
in say A1 to A6, then A7 is blank (or zero!).

Like clue EFG5 = 7 means that E5, F5 and G5 are all non-zero.
Unless I'm not looking at the clues properly...

Aaaahhhhhh! No! The numbers 1-7 are used. My sincere apologies.

Wet noodle lashes for you Pandora

I know!!! I know!!! I checked the information so carefully but didn't look twice at the directions.

A perfect job!

Pandora, give yourself only half the lashes you intended,
as it would have worked with 0 to 6, by reducing the clues
by 2 or 3, depending on number of squares clued:
A34 = 7 : 5
AB7 = 6 : 4
BC3 = 9 : 7
BC6 = 7 : 5
C45 = 8 : 6
D234 = 9 : 6
DE7 = 10 : 8
E123 = 8 : 5
EFG4 = 13 : 10
EFG5 = 7 : 4
G12 = 7 : 5
G67 = 5 : 3

This would then be the grid:
4,0,5,2,6,3,1
1,5,0,3,4,6,2
5,2,4,6,1,0,3
3,6,2,0,5,1,4
2,4,3,1,0,5,6
6,3,1,5,2,4,0
0,1,6,4,3,2,5

Oh, I deserve a full portion, Denis, but thank you. I hate wasting peoples' time, and I sure did a lot of that with this puzzle. It's a lot of fun when you've got all of the information right.