Cylindrical cross sums #2 - walkthrough

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Cylindrical cross sums #2 - walkthrough

Postby Richard S » Fri Aug 11, 2006 12:55 pm

And the last one I made during my holiday, a cylindrical cross sums, with digits 0 to 8 appearing in every row, column and colored region.

Sums outside the grid; in brackets the number of digits you have to add up, the other number is the sum.

Enjoy, and please let me know what you think of it!

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Last edited by Richard S on Sat Aug 19, 2006 3:59 am, edited 1 time in total.
Richard S
 
Posts: 24
Joined: 08 June 2006

walkthrough for those who can't get started

Postby Richard S » Wed Aug 16, 2006 6:28 pm

Maybe it's fair to write a start of a walkthrough on this puzzle, because the zero is not often used in sudoku's and because 'sums from the side' is relatively new.




Let's start with the obvious:
r8-9c5 = 0/2
r7-9c3 = 5/7/8; r7c3 =5 r8-9c3 = 7/8
r1c2-3 = 3/4

and than a very important one to continue:
r3c5-6 = 6/8 because of (4)16 [left] and (3)6 [right]

and than the rest:
r1-3C4 = 3/5/7
r6-7c5 = 3/6 (contains a 3 and sum is 9 (36-18-2-7)
r3c5 = 8
r3c6 = 6
r1-2c6 = 0/2
r2C4 & r4C4 = 1/4
r1c5 = 5
r1C4 = 7
r7-9c6 = 1/3/7
r7-9C4 = 4/6/8
r4-6C4 = 0/1/2
r4-6c6 = 4/5/8
r2c1 = 8
r3c1 or r3c2 = 7
r1c7 or r1c8 = 6 and 0 or 2
r2c7-9 = 4/5/7
r1c7 = 6
r2c7 = 4
r3c7 = 0
r2c5 = 1
r4c5 = 4
r2C4 = 3
r3c4 = 5
r2c8 = 7
r1c8 = 8
r3c8 = 2
r1c6 = 0
r2c6 = 2
r2c9 = 5
r3c9 = 4

and the rest is easier now, but don't hesitate to ask if you need help...

I will write a similar start of a walkthrough for my other puzzles soon.

Regards, Richard
Richard S
 
Posts: 24
Joined: 08 June 2006


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