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Puzzle 10/06/19: (A) VH

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daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Sat Jun 19, 2010 3:19 pm Post subject: Puzzle 10/06/19: (A) VH

Code:

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

Play this puzzle online at the Daily Sudoku site

keith

Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

Posted: Sun Jun 20, 2010 2:44 pm Post subject:

After basics:

Code:

+-------------------+-------------------+-------------------+
| 1 379$ 79 | 579 4 6 | 2 8 3579 |
| 3789 5 4 | 2 1 789 | 39 6 379 |
| 789 6 2 | 5789 3 5789 | 14 14 579 |
+-------------------+-------------------+-------------------+
| 579% 1 579% | 34 58 589 | 34 2 6 |
| 2 4 3 | 59 6 1 | 59 7 8 |
| 6 89 -589 | 34 7 2 | 13459 14 39 |
+-------------------+-------------------+-------------------+
| 35 38@ 1 | 6 58 4 | 7 9 2 |
| 4 2 58# | 578 9 578 | 6 3 1 |
| 79 79 6 | 1 2 3 | 8 5 4 |
+-------------------+-------------------+-------------------+

Note the DP 79 in R149. Either one of R4C13 is 5, and/or R1C2 is 3. The 35 pseudocell forms an XY-wing 3-58, removing 5 in R6C3 and solving the puzzle.

This is probably not what Danny had in mind ...

Keith

daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Sun Jun 20, 2010 4:31 pm Post subject:

keith wrote:

This is probably not what Danny had in mind ...

Keith: Nice find!

Code:

<79> DP[(5)r4c13 = (3)r1c2]r149c123 - (3=8)r7c2 - (8=5)r8c3 => r6c3<>5

-or-

(5)r6c3 - <79> DP[(5)r4c13 = (3)r1c2]r149c123 - (3=8)r7c2 - (8=5)r8c3 - (5)r6c3

What I had in mind is interesting as well.

Quote:

2x concurrent UR Type 1 => r6c7<>134.

Regards, Danny

Marty R.

Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

Posted: Mon Jun 21, 2010 9:54 pm Post subject:

Very nice Keith. I used the overlapping Type 1 URs. After removing 134 from r6c7, the remaining 589 triple finishes things off.

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