| View previous topic :: View next topic |
| Author |
Message |
daj95376
Joined: 23 Aug 2008
Posts: 3854
|
 Posted: Mon Jun 28, 2010 9:04 pm Post subject: Puzzle 10/06/28: "almost" VH with a twist |
 |
|
| Code: | +-----------------------+
| 2 . . | 8 . . | . 5 . |
| . 7 . | . 3 . | . . . |
| . . 8 | 5 . . | 3 . . |
|-------+-------+-------|
| 8 . 9 | 7 . 5 | . . 6 |
| . 6 . | . . . | 5 . 1 |
| . . . | 6 . 3 | 7 . . |
|-------+-------+-------|
| . . 2 | . 5 8 | 9 7 3 |
| 7 . . | . . . | 6 . . |
| . . . | 2 6 . | 1 . . |
+-----------------------+
|
Play this puzzle online at the Daily Sudoku site
| twist wrote: | overlapping URs form "combined" logic ___ peterj should love it.
|
|
|
| Back to top |
|
 |
daj95376
Joined: 23 Aug 2008
Posts: 3854
|
| Posted: Tue Jun 29, 2010 6:00 am Post subject: |
|
|
| This puzzle is more difficult that the title implies. More like Advanced!!! |
|
| Back to top |
|
|
peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
|
| Posted: Tue Jun 29, 2010 8:02 am Post subject: |
|
|
Nice one Danny!
Three steps including the twist (unless there is another one!)
| Quote: | UR(58) UR(48) overlap; r9c9=5, r6c8=9 (you can play it in two moves with the UR(48) for example as an "Avoidable rectangle" with three corners placed.)
x-wing(1) r26c3<>1, r3c6<>1
xy-wing(46-1) r3c6; r2c8<>1 |
I spent a bit of time trying to find some BUG-Lite logic in the trail of 14s - but failed. An extraneous x-chain on 4 was alll that came from it - for me at any rate. |
|
| Back to top |
|
|
tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
|
| Posted: Tue Jun 29, 2010 1:11 pm Post subject: |
|
|
Danny, your title for this puzzle encouraged me to look for interesting or unusual things. It was fun..........
I essentially did the same process as Peter and also used the UR that was not a VH step, but I assumed that was the "twist".
The only thing I found with all the 14s was a Remote Pair that did not shorten the number of steps (and was not a VH step). I also pursued the two overlapping AUR16 in r12c36 & r23c68, but was only able to get a wimpy r2c6<>1 result which was not useful.
Ted |
|
| Back to top |
|
|
daj95376
Joined: 23 Aug 2008
Posts: 3854
|
| Posted: Tue Jun 29, 2010 3:05 pm Post subject: |
|
|
| The overlapping URs was the twist that I saw. I have two more puzzles like this that I'll drop into the mix every now and then. |
|
| Back to top |
|
|
Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
|
| Posted: Tue Jun 29, 2010 3:59 pm Post subject: |
|
|
I guess I didn't notice overlapping URs.
Type 1 UR (58)
Remote Pairs (14)
Potential 45 DP in boxes 14; either way of killing it solves box 3 the same way. |
|
| Back to top |
|
|
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
