## HELP!! Stuck but am oh so close

Advanced methods and approaches for solving Sudoku puzzles

### HELP!! Stuck but am oh so close

I have just started trying to solve these puzzles and after (on numerous occassions) spending a while looking for my next move and realising I had made a mistake I decided I would whip up something in excel to do the easy work for me...this has sped things up and removes any human erorr I introduce.

Anyway, I have been reasonably successful....until I came across this one and got as far as I have....what am I missing? I have been able to solve it by using the "if this number goes here then this number must be this and this number must be this...until you come across a discrepancy" (aka T&E I believe but lets not go into that right now).

Maybe there is an X-wing or swordfish (I have no idea how to identify these yet but I have found links explaining them so if someone can say, "Yes, there is an X wing with the 3" then I will concentrate on that).

Sorry but I dont know what level this puzzle is and I may have got it from this site(god knows where tho), sorry for any duplication!

----------------
|x42|63x|xx5|
|xx5|27x|xxx|
|xxx|954|x28|
----------------
|19x|862|x5x|
|xx3|145|2x9|
|52x|397|xx6|
----------------
|759|416|xx2|
|231|589|467|
|4xx|723|591|
----------------
marders

Posts: 1
Joined: 13 June 2005

You got it from here: http://forum.enjoysudoku.com/viewtopic.php?t=387

This puzzle requires Trail and Error, there is no logical move at this time in the puzzle...
Animator

Posts: 469
Joined: 08 April 2005

I think there is a swordfish in the 4's. Quite what you do with it though I'm not sure.[/quote]
paulf2127

Posts: 26
Joined: 23 May 2005

In theory that is a swordfish... but it doesn't allow you to do anything, since the only 4's that are left are the ones forming the swordfish
Animator

Posts: 469
Joined: 08 April 2005