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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Sun Jan 03, 2010 9:50 pm Post subject: Puzzle 10/01/03 (A) |
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Today's puzzles complete another file of puzzles.
| Code: | +-----------------------+
| 3 4 5 | . . 6 | . . 2 |
| 6 . . | . . . | 5 . . |
| 7 . 8 | . 3 . | 6 . . |
|-------+-------+-------|
| . . . | . . 8 | 4 2 . |
| . . 2 | . . . | 8 . . |
| 8 . . | 2 . . | . . 3 |
|-------+-------+-------|
| . 6 1 | 7 2 . | . . 8 |
| . . . | 1 . . | . 4 . |
| 4 . . | . . 3 | 2 . . |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sun Jan 03, 2010 11:07 pm Post subject: |
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A two-stepper.
| Quote: | | A Type 4 UR (12) exposed a puzzle-ending XY-Wing (271) |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Sun Jan 03, 2010 11:59 pm Post subject: |
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Marty, I like yours better. Here is mine:
xy-wing 719 then
| Code: |
*--------------------------------------------------------------------*
| 3 4 5 | 9 17 6 | 17 8 2 |
| 6 12 9 | 48 1478 127 | 5 3 147 |
| 7 12 8 | 45 3 125 | 6 19 149 |
|----------------------+----------------------+----------------------|
| 15 79 6 | 3 179 8 | 4 2 159 |
| 15 3 2 | 46 14679 179 | 8 1679 1569 |
| 8 79 4 | 2 15679 1579 | 19 1679 3 |
|----------------------+----------------------+----------------------|
| 9 6 1 | 7 2 4 | 3 5 8 |
| 2 58 3 | 1 5689 59 | 79 4 679 |
| 4 58 7 | 568 5689 3 | 2 16 169 |
*--------------------------------------------------------------------*
An m-wing?
(1=7)r1c5-(7)r4c5=(7-9)r4c2=(9)r6c2-(9=1)r6c7-(1=7)r1c7
=> r1c7<>1
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Mon Jan 04, 2010 3:58 pm Post subject: |
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Three steps.
(9=5)r8c6 - UR12[(5)r3c6 = (7)r2c6]r23c26 - (7)r1c5 = (7)r1c7 - (7=9)r8c7; r8c259<>9,
UR12 in r23c26 with x-wing 2 deleted 1 in r23c6
xy-wing -127 with vertex in r2c6 completes the puzzle.
After reading the post by Marty, I realize my first step was not useful, but I did enjoy finding it.
Ted |
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