dailysudoku.com

daj95376 · Joined: 23 Aug 2008 Posts: 3854

For those who like a chain after basics ... plus non-chain step(s).

tlanglet · Posted: Sun Apr 11, 2010 1:02 pm Post subject:

Danny, I worked on this puzzle twice and never found an easy solution; it was a BBDBer for me. I used a x-wing, xy-wing, xyz-wing, skyscraper and more immediately after basics and then some simple chains followed by some messy chains. I will try it again in the future.

Ted

peterj · Joined: 26 Mar 2010 Posts: 974 Location: London, UK

I have had three goes at it now with similar results! Confused

After an x-wing and a skyscraper I have assorted chains - a W-wing on 21 or xy-chain, some useful strong links on 2 and a veritable converyor belt of 6s. I can delete a couple of 2s but nothing get's me very far. I think there's an xyz-wing in box8 also.

Going to give it one more go when the sun stops shining!

daj95376 · Joined: 23 Aug 2008 Posts: 3854

The "Chain" puzzles are meant to be extremely difficult compared to finding productive chains in my everyday puzzles. Even after you find the chain in this puzzle, more steps follow.

Four of the eight most productive chains start from one cell.

arkietech · Posted: Sun Apr 11, 2010 3:45 pm Post subject:

Good one Danny!

peterj · Joined: 26 Mar 2010 Posts: 974 Location: London, UK

Easy (?) when you are told where to look!!
A total of three steps - the chain and two more "chainy" moves

daj95376 · Joined: 23 Aug 2008 Posts: 3854

Marty R. · Posted: Mon Apr 12, 2010 12:18 am Post subject:

I used coloring (5), XYZ (128), X-Wing (6) and W-Wing (12) after which I hit the brick wall. Had to use my Medusa crutch to put me out of my misery.

Mogulmeister · Joined: 03 May 2007 Posts: 1151

Not as elegant as Dan's chain which acted as pincers on 1s. Mine acts to show a contradiction:

1.There is a contradiction if you put a 6 in r9c8

(6-8)r9c8=(8)r5c8-(8=9)r5c6-r3c6=(9-6)r3c5=(6)r9c5 so r9c8 <> 6

2 (Colouring) Kite on 5s

3 (Colouring) Skyscraper on 1s

Done