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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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 Posted: Mon Jun 18, 2012 10:51 pm Post subject: I refuse to be intimidated! |
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Pat's kind of puzzle.
This can be solved with basic moves.
In my arrogance, I try to do these with no pencil marks. After two days, I am still staring at it.
| Code: | Puzzle: FP061712Sun
+-------+-------+-------+
| . . 4 | . 1 . | . 7 2 |
| . . 6 | . . 4 | 8 9 . |
| . . . | 5 . . | . . . |
+-------+-------+-------+
| 4 . . | . . . | . . 3 |
| . . . | 4 8 2 | . . . |
| 2 . . | . . . | . . 9 |
+-------+-------+-------+
| . 7 . | . . 5 | . . . |
| . 8 2 | 7 . . | 1 . . |
| 9 . . | . 3 . | 5 . . |
+-------+-------+-------+ |
Keith |
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Pat
Joined: 23 Feb 2010
Posts: 207
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| Posted: Wed Jun 20, 2012 11:06 am Post subject: re: FP061712Sun |
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(3,9) r5\b4
that's shorthand for
2 separate moves in same houses
( not a duo )
. - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . - . -
time for me to confess
yes i like solving on paper
observing a duo, i will annotate the puzzle -- framing the 2 cells
(can be awkward in a box, worse when it's a trio)
lesser moves (box\line, line\box) are not annotated on the puzzle --
but all observations are recorded in margin-notes
(this allows me later to report my solution-path)
many of the observations will turn out to be red herrings,
those i will erase
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Tue Jun 26, 2012 7:02 am Post subject: |
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After clearing singles, there are a number of row / block intersections. The last of these reveals two more singles, labeled #.
| Code: | +-------------------+-------------------+-------------------+
| . 5 4 | . 1 . | . 7 2 |
|#1 . 6 | . #7 4 | 8 9 5 |
| . . . | 5 . . | . . . |
+-------------------+-------------------+-------------------+
| 4 . . | . . . | 2 . 3 |
| . . . | 4 8 2 | . . . |
| 2 . . | . . . | . . 9 |
+-------------------+-------------------+-------------------+
| 6 7 3 | 1 . 5 | 9 . 8 |
| 5 8 2 | 7 . . | 1 3 . |
| 9 4 1 | . 3 . | 5 . 7 |
+-------------------+-------------------+-------------------+ |
Now, look at the solved cells. There is a pair 16 in C2B4 (check C13) and a hidden pair 17 in C6B5 (check C45).
You should be able to see these without pencil marks. I sometimes can.
| Code: | +-------------------+-------------------+-------------------+
| . 5 4 | 3689 1 3689 | 36 7 2 |
|#1 23 6 | 23 #7 4 | 8 9 5 |
| 378 239 789 | 5 26 368 | 346 146 146 |
+-------------------+-------------------+-------------------+
| 4 16 578 | 69 569 1679 | 2 1568 3 |
| 37 39 579 | 4 8 2 | 67 156 16 |
| 2 16 578 | 36 56 1367 | 467 14568 9 |
+-------------------+-------------------+-------------------+
| 6 7 3 | 1 24 5 | 9 24 8 |
| 5 8 2 | 7 469 69 | 1 3 46 |
| 9 4 1 | 268 3 68 | 5 26 7 |
+-------------------+-------------------+-------------------+ |
Keith |
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