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Vanhegan Fiendish Cinco de Mayo

 
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Wed May 05, 2010 10:11 pm    Post subject: Vanhegan Fiendish Cinco de Mayo Reply with quote
An interesting puzzle if you ignore the obvious type 1 UR.


Code:

+-------+-------+-------+
| 5 7 . | . . . | . 1 . |
| . 6 1 | 9 8 . | . . . |
| 9 . . | 1 . 5 | . . . |
+-------+-------+-------+
| 7 . 4 | . 9 . | . 6 . |
| 8 . . | . . . | . . 3 |
| . 5 . | . 4 . | 9 . 2 |
+-------+-------+-------+
| . . . | 8 . 4 | . . 6 |
| . . . | . 6 9 | 3 2 . |
| . 8 . | . . . | . 5 4 |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site


Ted

Edited to post correct status; clues only, not after basics.

Last edited by tlanglet on Thu May 06, 2010 2:32 am; edited 1 time in total
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Thu May 06, 2010 12:33 am    Post subject: Reply with quote
Quote:
An interesting puzzle if you ignore the obvious type 1 UR.

Easy for you to say. Exclamation I ignored it because I didn't have one. Embarassed

Quote:
M-Wing (38 ) with four-cell pincer transport, leaving a BUG+1
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Thu May 06, 2010 2:33 am    Post subject: Reply with quote
Marty R. wrote:
Quote:
An interesting puzzle if you ignore the obvious type 1 UR.

Easy for you to say. Exclamation I ignored it because I didn't have one. Embarassed

Quote:
M-Wing (38 ) with four-cell pincer transport, leaving a BUG+1


Marty,

Very sorry! I was running short on time and posted the code after basics, not the original clues code.

Ted
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arkietech



Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
PostPosted: Thu May 06, 2010 2:36 am    Post subject: Reply with quote
Ignoring the ur 17 in B89 I found an xy-chain that solves the puzzle:
Quote:
(3=2)r4c2-(2=3)r7c2-(3=2)r7c1-(2=3)r2c1-(3=4)r2c8-(4=7)r5c8-(7=8)r6c8-(8=3)r6c6; r4c46,r6c3<>3
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Thu May 06, 2010 3:35 am    Post subject: Reply with quote
The type 1 UR solves the puzzle in one step. After ignoring it, I found few VH/VH+ steps; I specifically did not see the move posted by Marty.

I used my new tool, the naked pair for a one step solution.

Quote:
ANP(36)r6c34 = (7)r6c4 - (7=5)r5c5 - (5=4)r5c7 - (4=2)r2c7 - r2c1 = r7c1 - r7c2 = (2-3)r4c2 = (3)r6c3; r6c6<>3

Ted
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Thu May 06, 2010 3:58 am    Post subject: Reply with quote
Quote:
The type 1 UR solves the puzzle in one step. After ignoring it, I found few VH/VH+ steps; I specifically did not see the move posted by Marty.

If you still have your post-basics grid and want to post it, I'll see if my move is there. But don't go to a lot of trouble, it's not a big deal.
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Thu May 06, 2010 1:23 pm    Post subject: Reply with quote
Marty R. wrote:
Quote:
The type 1 UR solves the puzzle in one step. After ignoring it, I found few VH/VH+ steps; I specifically did not see the move posted by Marty.

If you still have your post-basics grid and want to post it, I'll see if my move is there. But don't go to a lot of trouble, it's not a big deal.


Here it is Marty.

Code:

+-----------+-------------+---------+
| 5  7  238 | 4   23  6   | 28 1  9 |
| 23 6  1   | 9   8   7   | 24 34 5 |
| 9  4  238 | 1   23  5   | 6  38 7 |
+-----------+-------------+---------+
| 7  23 4   | 235 9   238 | 58 6  1 |
| 8  9  26  | 26  57  1   | 45 47 3 |
| 1  5  36  | 367 4   38  | 9  78 2 |
+-----------+-------------+---------+
| 23 23 57  | 8   157 4   | 17 9  6 |
| 4  1  57  | 57  6   9   | 3  2  8 |
| 6  8  9   | 23  17  23  | 17 5  4 |
+-----------+-------------+---------+

Play this puzzle online at the Daily Sudoku site

Ted
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Thu May 06, 2010 4:02 pm    Post subject: Reply with quote
tlanglet wrote:
Marty R. wrote:
Quote:
The type 1 UR solves the puzzle in one step. After ignoring it, I found few VH/VH+ steps; I specifically did not see the move posted by Marty.

If you still have your post-basics grid and want to post it, I'll see if my move is there. But don't go to a lot of trouble, it's not a big deal.


Here it is Marty.

Code:

+-----------+-------------+---------+
| 5  7  238 | 4   23  6   | 28 1  9 |
| 23 6  1   | 9   8   7   | 24 34 5 |
| 9  4  238 | 1   23  5   | 6  38 7 |
+-----------+-------------+---------+
| 7  23 4   | 235 9   238 | 58 6  1 |
| 8  9  26  | 26  57  1   | 45 47 3 |
| 1  5  36  | 367 4   38  | 9  78 2 |
+-----------+-------------+---------+
| 23 23 57  | 8   157 4   | 17 9  6 |
| 4  1  57  | 57  6   9   | 3  2  8 |
| 6  8  9   | 23  17  23  | 17 5  4 |
+-----------+-------------+---------+

Play this puzzle online at the Daily Sudoku site

Ted

Ted, the 38s in boxes 35 are connected by the 8s. Extend the 3 from r3c8 to r2c8 to establish the pincers, then transport the 3 from r2c8 to r7c1 via r2c1. However, I had a 39 in r7c8, which is obviously wrong if I had that 23 pair in r7. I have no idea of how I got there.
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
PostPosted: Thu May 06, 2010 5:22 pm    Post subject: Reply with quote
I found it sufficient to work on 2 only:
W 2-3 in R1C3
W 2-3 in R4C4
XY with transport -258 in R4C2

I think you can substitute an XY and an XYZ wing for the first two W's.

Keith
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nataraj



Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
PostPosted: Thu May 06, 2010 8:04 pm    Post subject: Reply with quote
I resisted the UR temptation as per Ted's advice, found an xy-wing (23-28-38 ) in boxes 2 and 3, which took out the 3 in r3c5/2 in r3c3. The resulting w-wing (r3c3,r6c6 via col 8 ) solved the puzzle.
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Thu May 06, 2010 9:52 pm    Post subject: Reply with quote
Quote:
I specifically did not see the move posted by Marty.


Let's try this again. I erred in prior posts, both in saying that I had no Type 1 and in describing my M-Wing. The 38s in boxes 35 are linked by 8s and the 3 in r3c8 is extended to r2c8 to form pincers at a and d. Extend one abc and the other def and the new pincers cf take out the 3 from r7c2. Sorry about any confusion I created.

Code:
+-------------+-----------+------------+
| 5   7   238 | 4   23  6   | 28 1   9 |
| 23b 6   1   | 9   8   7   | 24 34a 5 |
| 9   4   238 | 1   23  5   | 6  38  7 |
+-------------+-------------+----------+
| 7   23f 4   | 235 9   238 | 58 6   1 |
| 8   9   26  | 26  57  1   | 45 47  3 |
| 1   5   36e | 367 4   38d | 9  78  2 |
+-------------+-------------+----------+
| 23c 2-3 57  | 8   157 4   | 17 9   6 |
| 4   1   57  | 57  6   9   | 3  2   8 |
| 6   8   9   | 23  17  23  | 17 5   4 |
+-------------+-------------+----------+
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