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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Fri Jul 23, 2010 11:38 am Post subject: Puzzle 10/07/23: B |
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| Code: | +-----------------------+
| . . . | . 5 9 | 2 8 . |
| . . 3 | . . . | 4 . . |
| . 8 2 | . 4 . | 9 3 5 |
|-------+-------+-------|
| . . . | 5 . . | . . 4 |
| 7 . 5 | . . . | 1 9 . |
| 8 . . | . . . | . . . |
|-------+-------+-------|
| 5 1 4 | . 9 . | 3 7 . |
| 3 . 8 | . 7 . | 6 4 . |
| . . 7 | 8 . . | . . . |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Fri Jul 23, 2010 11:20 pm Post subject: |
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I'm killing time ... and so you should ignore this as anything earthshaking. I'm just easily impressed by extending a W-Wing through an internal X-Chain -- especially when the X-Chain cells are also a non-productive Remote Pair.
(Note: These chains can also be represented as 6-cell XY-Chains.)
| Code: | (2=6)r4c8 - r2c8 = r1c9 - r1c3 = r6c3 - (6=2)r5c2 => r4c1,r5c9<>2
+--------------------------------------------------------------+
| 4 7 d16 | 3 5 9 | 2 8 c16 |
| 9 5 3 | 26 1268 1268 | 4 b16 7 |
| 16 8 2 | 7 4 16 | 9 3 5 |
|--------------------+--------------------+--------------------|
| 16-2 3 9 | 5 126 7 | 8 a26 4 |
| 7 f26 5 | 4 268 2368 | 1 9 36-2 |
| 8 4 e16 | 9 126 1236 | 7 5 236 |
|--------------------+--------------------+--------------------|
| 5 1 4 | 26 9 26 | 3 7 8 |
| 3 29 8 | 1 7 5 | 6 4 29 |
| 26 269 7 | 8 3 4 | 5 12 129 |
+--------------------------------------------------------------+
# 43 eliminations remain
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| Code: | (2=6)r4c8 - r2c8 = r1c9 - r1c3 = r3c1 - (6=2)r9c1 => r4c1,r9c8<>2
+--------------------------------------------------------------+
| 4 7 d16 | 3 5 9 | 2 8 c16 |
| 9 5 3 | 26 1268 1268 | 4 b16 7 |
| e16 8 2 | 7 4 16 | 9 3 5 |
|--------------------+--------------------+--------------------|
| 16-2 3 9 | 5 126 7 | 8 a26 4 |
| 7 26 5 | 4 268 2368 | 1 9 236 |
| 8 4 16 | 9 126 1236 | 7 5 236 |
|--------------------+--------------------+--------------------|
| 5 1 4 | 26 9 26 | 3 7 8 |
| 3 29 8 | 1 7 5 | 6 4 29 |
| f26 269 7 | 8 3 4 | 5 1-2 129 |
+--------------------------------------------------------------+
# 43 eliminations remain
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sat Jul 24, 2010 12:46 am Post subject: |
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| I played an apparently unnecessary Remote Pairs on 16. Then I played a flightless M-Wing on the 26s in boxes 67, transporting the pincer 6 from r4c8 to r3c1; r9c1<>6. |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Sat Jul 24, 2010 1:27 pm Post subject: |
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Looked "xy chainy" to me after basics
| Quote: | | xy-chain (6=2)r5c2 - (2=9)r8c2 - (9=2)r8c9 - (2=1)r9c8 - (1=6)r2c8 - (6=1)r1c9 - (1=6)r1c3; r6c3<>6 |
(A 7 cell brute - but there are some conjugate links to use instead if preferred.) |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sat Jul 24, 2010 2:58 pm Post subject: |
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An AUR was also useful..............
| Quote: | | AUR29[(6)r9c2=(1)r9c9]r89c29-(1=6)r1c9-r1c3=(6)r3c1; r9c1<>6 |
Ted |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Sat Jul 24, 2010 4:30 pm Post subject: |
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| Ted, text book use of the SL in the AUR - very elegant! |
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