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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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 Posted: Fri Oct 10, 2008 7:02 pm Post subject: oct 10 competition |
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| Code: | . . .|. . 1|9 . 4
. . .|. . .|7 . 6
9 . .|. 4 6|. 1 2
-----+-----+-----
. 5 3|. 8 .|. . .
1 . .|. . .|. . 9
. . .|. 7 .|8 5 .
-----+-----+-----
3 8 .|9 . .|. . 7
5 . 1|. . .|. . .
7 . 9|6 . .|. . . |
VH methods solve it in two. the ambitious chain searchers will solve it in one.
on the same note, I'd also like to include today's one trick pony as a similar type.
| Code: | . . 1|. . 8|. . .
. 3 8|. . .|9 . .
. . .|3 2 .|. . 5
-----+-----+-----
. 7 .|6 . .|. . .
6 . 5|. . .|2 . 9
. . .|. . 5|. 4 .
-----+-----+-----
2 . .|. 6 4|. . .
. . 3|. . .|1 8 .
. . .|7 . .|4 . . |
in this case the usual (x,xy,xyz) - wing moves or even the ambitious xy-chain doesn't do what a simple coloring move will. I will have to see how many w-wings or m-wings solve it. |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Fri Oct 10, 2008 8:21 pm Post subject: |
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As suggested, I solved the first puzzle in two moves: | Quote: | | xy <345> and a BUG+1. |
I still need to try the second puzzle
Ted |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Fri Oct 10, 2008 9:05 pm Post subject: |
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| tlanglet wrote: | As suggested, I solved the first puzzle in two moves: | Quote: | | xy <345> and a BUG+1. |
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Two moves for me also:
| Quote: | | xy345 and xy245 instead of bug |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Fri Oct 10, 2008 9:13 pm Post subject: |
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W-wing and BUG+1.
Keith |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sat Oct 11, 2008 1:19 am Post subject: |
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On the second puzzle, digit <1> was the killer. I required two moves to do the deed: | Quote: | A kite in box 4 with the pincer at r7c2 transported to r6c4 via r7c4 and the pincer at r4c9 transported to r5c2 via r4c1 to delete <1> at r5c56. Then coloring on <1> eliminates eight <1s> to complete the puzzle.
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Ted |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Sat Oct 11, 2008 4:22 am Post subject: |
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| tlanglet wrote: | On the second puzzle, digit <1> was the killer. I required two moves to do the deed: | Quote: | A kite in box 4 with the pincer at r7c2 transported to r6c4 via r7c4 and the pincer at r4c9 transported to r5c2 via r4c1 to delete <1> at r5c56. Then coloring on <1> eliminates eight <1s> to complete the puzzle.
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Nice  Did anyone find the one trick pony? |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Sat Oct 11, 2008 5:30 am Post subject: |
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| Quote: | | Nice Did anyone find the one trick pony? |
yes, a single digit coloring move will finish it. |
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Asellus
Joined: 05 Jun 2007
Posts: 865
Location: Sonoma County, CA, USA
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| Posted: Sat Oct 11, 2008 6:13 am Post subject: |
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Yes, a simple 5-cell basic coloring is all that is needed.
However, there is a more complicated, but interesting, single step solution:
| Code: | +-----------+----------------+----------------+
| 5 2 1 | 9 [47] 8 |[67] 3 [46] |
| 7 3 8 | 5 [14] 6 | 9 2 [14] |
| 9 4 6 | 3 2 [17] | 8 [17] 5 |
+-----------+----------------+----------------+
| 18 7 4 | 6 9 2 | 3 5 18 |
| 6 18 5 | 4 1378 [17]3 | 2 [17] 9 |
| 3 9 2 | 18 [17]8 5 |[67] 4 [16]8 |
+-----------+----------------+----------------+
| 2 18 7 | 18 6 4 | 5 9 3 |
| 4 6 3 | 2 5 9 | 1 8 7 |
| 18 5 9 | 7 138 13 | 4 6 2 |
+-----------+----------------+----------------+ |
The digits shown in brackets form a DP. This in turn creates the {38} pseudo-cell (3)r5c6=(8)r6c59.
That pseudo-cell forms a 138 "XY Wing":
(8=1)r7c4 - (1=3)r9c6 - (3)r5c6=(8)r6c59
This eliminates <8> from r6c4.
It might seem weird, but this was the one-step solution I noticed first. |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Sat Oct 11, 2008 4:44 pm Post subject: |
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| arkietech wrote: | | Did anyone find the one trick pony? |
Not as involved as Asellus' solution, but slightly more complex than a single-digit solution.
| Code: | Remote Pair (18)
+--------------------------------------------------------------+
| 5 2 1 | 9 47 8 | 67 3 46 |
| 7 3 8 | 5 14 6 | 9 2 14 |
| 9 4 6 | 3 2 17 | 8 17 5 |
|--------------------+--------------------+--------------------|
| 18 7 4 | 6 9 2 | 3 5 18 |
| 6 *18 5 | 4 37-18 137 | 2 17 9 |
| 3 9 2 | *18 178 5 | 67 4 168 |
|--------------------+--------------------+--------------------|
| 2 *18 7 | *18 6 4 | 5 9 3 |
| 4 6 3 | 2 5 9 | 1 8 7 |
| 18 5 9 | 7 138 13 | 4 6 2 |
+--------------------------------------------------------------+
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| Code: | W-Wing (18) [r6c4]+(8)r5+[r7c2] => [r7c4]<>1
+--------------------------------------------------------------+
| 5 2 1 | 9 47 8 | 67 3 46 |
| 7 3 8 | 5 14 6 | 9 2 14 |
| 9 4 6 | 3 2 17 | 8 17 5 |
|--------------------+--------------------+--------------------|
| 18 7 4 | 6 9 2 | 3 5 18 |
| 6 18# 5 | 4 1378# 137 | 2 17 9 |
| 3 9 2 | *18 178 5 | 67 4 168 |
|--------------------+--------------------+--------------------|
| 2 *18 7 | 8-1 6 4 | 5 9 3 |
| 4 6 3 | 2 5 9 | 1 8 7 |
| 18 5 9 | 7 138 13 | 4 6 2 |
+--------------------------------------------------------------+
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Sat Oct 11, 2008 5:59 pm Post subject: |
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want another one step puzzle?
this is a puzzle posted by GSF (#116) in patterns game #047. I like what Ravel does sometimes in providing some interesting puzzles from those games so I had a peak at some VH+ puzzles around a 7.0 rating. However, this puzzle does succomb to a move which should be considered less than 7.0 IMO.
| Code: | . . 1|. . 2|. . 3
. 4 .|. . .|. 5 .
6 . .|. 7 .|8 . .
-----+-----+-----
. . .|1 . 6|. . 9
. . 9|. . .|6 . .
3 . .|9 . 7|. . .
-----+-----+-----
. . 5|. 1 .|. . 4
. 2 .|. . .|. 9 .
4 . .|8 . .|3 . . |
| Code: | .------------------------.------------------------.------------------------.
| 5789 5789 1 | 456 45689 2 | 479 467 3 |
| 2789 4 2378 | 36 3689 1389 | 1279 5 1267 |
| 6 359 23 | 345 7 13459 | 8 124 12 |
:------------------------+------------------------+------------------------:
| 2578 578 2478 | 1 23458 6 | 2457 23478 9 |
| 12578 1578 9 | 2345 23458 3458 | 6 123478 12578 |
| 3 1568 2468 | 9 2458 7 | 1245 1248 1258 |
:------------------------+------------------------+------------------------:
| 789 36789 5 | 2367 1 39 | 27 2678 4 |
| 178 2 3678 | 34567 3456 345 | 157 9 15678 |
| 4 1679 67 | 8 2569 59 | 3 1267 12567 |
'------------------------'------------------------'------------------------' |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Sat Oct 11, 2008 6:14 pm Post subject: |
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I see an empty rectangle. It is easy when you are set up 
Thanks norm. I like puzzles like this. |
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