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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Fri Feb 26, 2010 2:05 am Post subject: Puzzle 10/02/25 (A) |
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| Code: | +-----------------------+
| 5 9 . | 7 . 4 | . . . |
| 7 8 . | 2 . . | . . 3 |
| . . 4 | . . . | . . 5 |
|-------+-------+-------|
| 6 2 . | 4 9 . | 5 3 . |
| . . . | 3 2 . | . . 4 |
| 3 . . | . . . | . . 9 |
|-------+-------+-------|
| . . . | 9 . . | 3 . 7 |
| . . . | 6 . . | . . 2 |
| . 6 3 | . 7 2 | 4 9 1 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Fri Feb 26, 2010 4:32 am Post subject: |
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whoa
if you do some multicoloring on 1 you can find a fish like animal that makes 13 eliminations.
| Code: | +------------------+---------------------+----------------+
| 5 9 2(1) | 7 3 4 | 2(1) 8 6 |
| 7 8 6 | 2 5(1) 59(1) | 9(1) 4 3 |
| 12 3 4 | 8(1) 68-1 689-1 | 279-1 27-1 5 |
+------------------+---------------------+----------------+
| 6 2 7(1) | 4 9 7(1) | 5 3 8 |
| 19 157 5789-1 | 3 2 5678-1 | 67-1 17 4 |
| 3 4 578-1 | 8(1) 568-1 5678-1 | 267-1 127 9 |
+------------------+---------------------+----------------+
| 124 15 25-1 | 9 148 18 | 3 6 7 |
| 149 17 79-1 | 6 14 3 | 8 5 2 |
| 8 6 3 | 5 7 2 | 4 9 1 |
+------------------+---------------------+----------------+ |
but even better is a als move using the already present xyz-wing
| Code: | +------------------+-----------------+--------------+
| 5 9 (12) | 7 3 4 | 12 8 6 |
| 7 8 6 | 2 15 159 | 19 4 3 |
| 12 3 4 | 18 168 1689 | 1279 127 5 |
+------------------+-----------------+--------------+
| 6 2 7(1) | 4 9 7(1) | 5 3 8 |
| 19 157 15789 | 3 2 15678 | 167 17 4 |
| 3 4 1578 | 18 1568 15678 | 1267 127 9 |
+------------------+-----------------+--------------+
| 124 (15) (125) | 9 148 8-1 | 3 6 7 |
| 149 17 79-1 | 6 14 3 | 8 5 2 |
| 8 6 3 | 5 7 2 | 4 9 1 |
+------------------+-----------------+--------------+ |
the part in red is the xyz-wing and already eliminates the 1 in r8c3
ALS[(1)r7c23 = (2)r7c3]r7c23 - (2=1)r1c3 - (1)r4c1 = (1)r4c6; r7c6 <> 1
then UR type 1 {1,4} is left to finish |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Fri Feb 26, 2010 7:45 am Post subject: |
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| storm_norm wrote: | the part in red is the xyz-wing and already eliminates the 1 in r8c3
ALS[(1)r7c23 = (2)r7c3]r7c23 - (2=1)r1c3 - (1)r4c1 = (1)r4c6; r7c6 <> 1
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Nice move Norm  I have to work on chaining moves. I like the concept |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Fri Feb 26, 2010 4:21 pm Post subject: |
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| I used three ERs, all on 1, followed by an XY-Wing (271), Type 4 UR (14) and a Kite (1). |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Fri Feb 26, 2010 7:38 pm Post subject: |
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Norm, your solution was great. I had a variation on your view.
ALS 179[(9)r8c3 = (1)r48c3]r48c3 - r1c3 = r3c1 - (1=9)r5c1; r8c1<>9.
I then used the strong inference on the resulting Type 3 UR14.
(1=2)r3c1 - UR14[(2)r7c1 = (8)r7c5]r78c15 - (8=1)r7c6; r7c1<>1 plus transport:(1)r7c6 - r4c6 = r4c3; r1c3<>1.
Ted |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Fri Feb 26, 2010 10:15 pm Post subject: |
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| with all this firepower, we just kicked this puzzle's butt. |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Fri Feb 26, 2010 10:44 pm Post subject: |
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Not an easy VH+ puzzle to solve.
| Code: | r1 b4 Empty Rectangle <> 1 r5c7
r2c4 2-String Kite <> 1 r6c7
<27+1> XY-Wing r3c8/r3c1+r5c8 <> 1 r5c1
r78c15 <14> UR Type 4 <> 1 r7c15
r4c2 2-String Kite <> 1 r7c6
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