dailysudoku.com

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

Two non-fancy(!) moves..

daj95376 · Joined: 23 Aug 2008 Posts: 3854

Marty R. · Posted: Wed Apr 06, 2011 12:42 am Post subject:

Three non-fancy moves.

Coloring; r2c6<>3
Type 1 UR (59)
X-Wing; r1c6, r6c3<>6

tlanglet · Posted: Thu Apr 07, 2011 3:04 pm Post subject:

One non-fancy and one "kinda" fancy AURs ..........

Type 1 UR(59)r24c89; r2c9<>59=3

AUR(56)r69c45 external sis r5c46=5, r4c6=6; r4c6=6
AUR(56)[(6)r4c6=(5)r5c46]-(5=3)r5c3-(3=6)r4c3-r2c3=(6-3)r1c2=r1c6-(3=6)r4c6;

Ted

daj95376 · Joined: 23 Aug 2008 Posts: 3854

Ted,

I understand that the AUR is what caught your attention and started your analysis. What bothers me is that the part in green exists w/o the AUR.

AUR(56)[(6)r4c6=(5)r5c46]-(5=3)r5c3-(3=6)r4c3-r2c3=(6-3)r1c2=r1c6-(3=6)r4c6

In fact, all you need is:

(6)r2c3=(6-3)r1c2=r1c6-(3=6)r4c6; r4c3<>6

tlanglet · Posted: Fri Apr 08, 2011 2:40 pm Post subject:

Danny,

As I have done in the past, I posted the actual sequence of steps that I initially found. In reviewing the pattern, I noticed other possibilities and also considered the recent post by Ronk regarding solutions that set a value rather than make a deletion, but again I choose to post my initial result since it reflects the logic used.

Ted.

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

Ted, some like to optimise some don't - I get as much fun trying to make my solution more 'optimal' as I do originally solving it. I don't obsess over it for most puzzles (though I do for some of the weekly published ones) and I often set myself a bar on what types of move I am going to explore for a particular puzzle. Each to his own!