dailysudoku.com Forum Index dailysudoku.com
Discussion of Daily Sudoku puzzles
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Documenting Solution Steps

Post new topic   Reply to topic    dailysudoku.com Forum Index -> Other puzzles
View previous topic :: View next topic  
Author Message

Joined: 01 Aug 2005
Posts: 198
Location: Bideford Devon EX39

PostPosted: Tue Sep 20, 2005 10:51 pm    Post subject: Documenting Solution Steps Reply with quote

Several contributions to various fora refer to backtracking or reviewing
what one has done so far.

A computer solution can prepare elaborate and excellent trails to a
solution but what is an easy way to document the solution process
when working manually?

Pencil marks can be used to work towards a solution but once a digit
has been eliminated, how can one know that it was still a possibility
three, six or ten moves previously? Short of taking a snapshot after
each move, one must develop an "audit trail" of some kind.

Do other solvers maintain such a trail?
What tips and tricks are there for working back from a mistake (or even
from a trial/error "stuck" position)?

Alan Rayner BS23 2QT
Back to top
View user's profile Send private message

PostPosted: Mon Oct 03, 2005 3:07 am    Post subject: methodology to solve puzzles. Reply with quote

i'm new to this but i put all possible digits in a square based on the horizontal, vertical and local grid. then i look for anything by itself and fill it in. then i look at a local grid to see if anything can be elminated as creating a forced duplication of a digit

without knowing it my first puzzle solved was a "hard" puzzle. i have since solved a couple others but failed on a "very hard" from last week.

this is terrific fun and i look forward to doing more of them in the future. i don't know the tips and tricks but going at it with a modified algorithm seems the way to go for me.
Back to top

PostPosted: Mon Oct 03, 2005 3:08 am    Post subject: audit trail Reply with quote

i use pencil to fill in squares. on things i fill that i'm sure about i put a small dog in the square with the digit. then if i make a mistake and have to backtrack out i only erase things that don't have a dot.
Back to top
Display posts from previous:   
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Other puzzles All times are GMT
Page 1 of 1

Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

Powered by phpBB © 2001, 2005 phpBB Group