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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Fri Feb 12, 2010 6:55 pm Post subject: Puzzle 10/02/12 (C) |
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Rated XY.
| Code: | +-----------------------+
| 8 . . | 5 . 9 | 2 . . |
| . 6 . | 2 1 . | . . 8 |
| . . 7 | . 3 8 | . 9 . |
|-------+-------+-------|
| 7 5 . | . 6 3 | . 8 2 |
| . 8 6 | 9 . . | 1 . . |
| 1 . 2 | 8 . 5 | . . . |
|-------+-------+-------|
| 6 . . | . 9 . | . . . |
| . . 1 | 3 . . | . 2 . |
| . 9 . | 7 . . | . . . |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Sun Feb 14, 2010 7:42 pm Post subject: |
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I used two steps | Code: | w-wing 34
*-----------------------------------------------------------*
| 8 1 3 | 5 47 9 | 2 467 67 |
| 9 6 5 | 2 1 47 | 37 347 8 |
| 24 24 7 | 6 3 8 | 5 9 1 |
|-------------------+-------------------+-------------------|
| 7 5 9 | 1 6 3 | 4 8 2 |
| 34 8 6 | 9 2 47 | 1 357 357 |
| 1 34 2 | 8 47 5 | 6 37 9 |
|-------------------+-------------------+-------------------|
| 6 23 8 | 4 9 12 | 37 1357 357 |
| 5 7 1 | 3 8 6 | 9 2 4 |
| 23 9 4 | 7 5 12 | 8 136 36 |
*-----------------------------------------------------------*
(3)r7c2 = (3-4)r6c2 = (4-7)r6c5 = r1c5 - (7=6)r1c9 - (6=3)r9c9; r7c789,r9c1<>3
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Wendy W
Joined: 04 Feb 2008
Posts: 144
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| Posted: Sun Feb 14, 2010 11:12 pm Post subject: |
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| Dan, what did you use to get to that grid? I've done basics and an x-wing and I'm not even close to that point. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Mon Feb 15, 2010 1:00 am Post subject: |
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| I used a million steps, give or take a few. |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Mon Feb 15, 2010 1:46 am Post subject: |
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The first step is the BIG ONE.
| Code: | W-Wing: (3=4)r1c3 - r1c5 = r6c5 - (4=3)r6c2 => r1c2<>3
+--------------------------------------------------------------------+
| 8 14-3 a34 | 5 b47 9 | 2 1467 1467 |
| 9 6 5 | 2 1 47 | 37 347 8 |
| 24 124 7 | 6 3 8 | 5 9 14 |
|----------------------+----------------------+----------------------|
| 7 5 9 | 1 6 3 | 4 8 2 |
| 34 8 6 | 9 2 47 | 1 357 357 |
| 1 d34 2 | 8 c47 5 | 3679 367 3679 |
|----------------------+----------------------+----------------------|
| 6 237 38 | 4 9 12 | 378 1357 1357 |
| 45 47 1 | 3 58 6 | 789 2 479 |
| 2345 9 348 | 7 58 12 | 368 1346 1346 |
+--------------------------------------------------------------------+
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| Code: |
<67+3> XY-Wing r1c9/r2c7+r9c9 <> 3 r7c7
+--------------------------------------------------------------------+
| 8 1 3 | 5 47 9 | 2 467 v67 |
| 9 6 5 | 2 1 47 | a37 347 8 |
| 24 24 7 | 6 3 8 | 5 9 1 |
|----------------------+----------------------+----------------------|
| 7 5 9 | 1 6 3 | 4 8 2 |
| 34 8 6 | 9 2 47 | 1 357 357 |
| 1 34 2 | 8 47 5 | 6 37 9 |
|----------------------+----------------------+----------------------|
| 6 23 8 | 4 9 12 | 7-3 1357 357 |
| 5 7 1 | 3 8 6 | 9 2 4 |
| 23 9 4 | 7 5 12 | 8 136 b36 |
+--------------------------------------------------------------------+
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| Code: |
r6c6 2-String Kite <> 7 r2c8
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oaxen
Joined: 10 Jul 2006
Posts: 96
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| Posted: Mon Feb 15, 2010 6:37 pm Post subject: Chain |
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Dear Dan
"4" in r5c6 gives a one step chain.
I like your puzzles especially when they are impossible to solve with just one chain. Makes it more interesting when there are dead ends and a neccessity to start a secondary chain
Lars |
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Wendy W
Joined: 04 Feb 2008
Posts: 144
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| Posted: Wed Feb 17, 2010 12:03 am Post subject: |
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| Thanks, Danny. D'oh! I'm a little embarrassed I missed that first one. Always seems SO obvious when somebody points it out to you, doesn't it! |
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