## Times 1643 Super Fiendish

Post the puzzle or solving technique that's causing you trouble and someone will help

### Times 1643 Super Fiendish

I made a meal of solving this one using only forcing nets. What's the more direct approach?

Code: Select all
`..5 8.3 .9.... ..1 ..49.. ... 6..1.. ..4 .39... ... ...62. 1.. ..8..4 ... ..68.. 7.. ....1. 9.2 5..`

Richard M
richardm

Posts: 53
Joined: 27 December 2006

You have several naked pairs and triples. Look closely.
Carcul

Posts: 724
Joined: 04 November 2005

Hi,
I am new to this forum, so I know only a few of the names for techniques!
As Carcul pointed out, there are two naked pairs (k1/k9=3/7 and k5k8=4/8), one trio (b/g/h7=3/8/9), and one quartet (a/d/e/f7=1/2/4/7).
Once those are identified the only trick is finding the best fork to start your "trial and error" from. Either luck or instinct led me to h5/k5=4. k5=4 very soon leads to a contradiction, and h5=4 (k8=4,k5=8, etc.) starts a straight path, with no more forks, to the end.
Not fiendish at all!
JB
bingham

Posts: 12
Joined: 17 December 2007

bingham wrote:Hi,
I am new to this forum, so I know only a few of the names for techniques!
As Carcul pointed out, there are two naked pairs (k1/k9=3/7 and k5k8=4/8), one trio (b/g/h7=3/8/9), and one quartet (a/d/e/f7=1/2/4/7).
Once those are identified the only trick is finding the best fork to start your "trial and error" from. Either luck or instinct led me to h5/k5=4. k5=4 very soon leads to a contradiction, and h5=4 (k8=4,k5=8, etc.) starts a straight path, with no more forks, to the end.
Not fiendish at all!
JB

I look at the Carcul post, then yours.

Why?
wintder

Posts: 297
Joined: 24 April 2007

Being equally brief: Why what?
bingham

Posts: 12
Joined: 17 December 2007

### Times 1643 Super Fiendish

bingham wrote:".....I am new to this forum, so I know only a few of the names for techniques!....."

Hi bingham,
As you are new to the Forum you may not have yet become acquainted with the recommended procedure when posting. If you click on HERE you can read up on the preferred posting procedure and also click on this Basic Terminology link.

Note that cells are defined by their specific row and column rather than using alphabet letters. As the saying goes, the chorus sounds better when we use the same music sheet.

As Carcul pointed out there are several naked pairs, etc. though I also had to use the "Locked Candidates" technique to unfold the puzzle prior to naked singles popping up everywhere to solve it. No "trial and error" is required to solve this puzzle. There are many links describing solving techniques but I found the clearest explanation of "Locked Candidates" and other basic techniques was explained click here when I first joined the forum. Good luck with your homework

Cec
Cec

Posts: 1039
Joined: 16 June 2005

Thanks CEC for the guidance and encouragement. I have always been tempted to resort to T&E too soon. It works of course, but is not so elegant.
Actually, on this one I'm not sure which of all those techniques i used, but i got there anyway!
Bingham
bingham

Posts: 12
Joined: 17 December 2007