OK, I give up

Advanced methods and approaches for solving Sudoku puzzles

OK, I give up

Postby QBasicMac » Fri Jul 22, 2005 12:33 am

Code: Select all
Original Puzzle
-7- 6-9 -3-
--- -4- -8-
--- --3 546
--- 4-- -5-
7-- --- --9
-3- --5 ---
982 5-- ---
-5- -7- ---
-1- 9-4 -2-

I forgot where I got that puzzle. Probably recent sudoku.com. But anyway, I give up trying to solve it.

Code: Select all
Solution So Far
-7- 659 -3-
563 -4- 987
--- 783 546
--- 4-7 -5-
745 --- --9
-3- --5 ---
982 5-- ---
-5- -7- -9-
-17 9-4 825


If I guess a 1 at r2c6, it solves immediately.

How can I proceed without guessing?

Mac
QBasicMac
 
Posts: 441
Joined: 13 July 2005

Postby simes » Fri Jul 22, 2005 7:21 am

Look where 2 can go in blocks 2 and 8, it allows an elimination in block 5. Then do the same for 8 in blocks 4 and 6.
Last edited by simes on Sun Dec 11, 2011 9:27 am, edited 1 time in total.
simes
 
Posts: 324
Joined: 11 March 2005
Location: UK

Postby QBasicMac » Fri Jul 22, 2005 11:24 am

At first, I thought you were mistaken, but I kept at it and finally found that I had a pencilmarks error which led to that solution not being possible.

Thanks! Wouldn't have found it without you!

Mac
QBasicMac
 
Posts: 441
Joined: 13 July 2005


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