The New Sudoku Players' Forum

[davepyro]

Hi,
I wanna enquire about the following Sudoku puzzle (no.28), from Book 2 of The Times, which had thrown up its own mystery.
While finishing this particular puzzle I flicked to the back pages to check my answer only to discover an alternative solution to my own. After double checking my solution I ran a Sudoku program on my computer only to receive a third solution. This is puzzling me as the introduction in the book clearly states "Do remember - there is only one solution to each puzzle".

(See below for details...)

puzzled,
Dave from Ireland

original puzzle No.28 SuDoku Book 2

2_7|9__|63_
31_|__4|___
6__|1__|___
---------------
__4|5_9|8__
___|___|___
__2|8_7|9__
---------------
___|__1|__5
___|3__|_27
_93|__5|1_8

Original solution

247|958|631
315|674|289
689|132|754
--------------
134|569|872
978|423|516
562|817|943
--------------
426|781|395
851|396|427
793|245|168

My solution

247|958|631
318|764|259
659|132|784
--------------
834|519|872
971|623|546
562|847|913
--------------
726|481|395
185|396|427
493|275|168

Computers solution

247|958|631
319|674|582
685|132|749
--------------
164|529|873
978|413|256
532|867|914
--------------
426|781|395
851|396|427
793|245|168

[Pappocom]

Quick observation: Your statement of puzzle #28 omits the 2-clue from r5c5. That would explain the "computer's solution".

Also I see that in your solution, you have two 8s in row 4.

- Wayne

[afecay]

Quick observation: Your statement of puzzle #28 omits the 2-clue from r5c5. That would explain the "computer's solution".

Also I see that in your solution, you have two 8s in row 4.

- Wayne

I also noticed that. ... have been caught out more than once in the computer version too ...