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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Sun Jun 27, 2010 5:46 am Post subject: Puzzle 10/06/27: BBDB XY |
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| Code: | +-----------------------+
| 6 . . | 4 1 9 | . . . |
| . . . | . . . | . 5 . |
| . . 3 | 8 . . | . . . |
|-------+-------+-------|
| 8 . 1 | 5 . . | 4 . . |
| 7 . . | . 4 . | 5 9 . |
| . . . | . . 8 | . . 7 |
|-------+-------+-------|
| . . . | 1 3 . | . . . |
| . 3 . | 7 6 . | . . 5 |
| . . . | . . 4 | . 6 1 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site
| Code: | after basics
+--------------------------------------------------------------+
| 6 578 578 | 4 1 9 | 278 2378 23 |
| 49 1478 4789 | 26 27 3 | 1678 5 46 |
| 2 147 3 | 8 5 67 | 1679 147 469 |
|--------------------+--------------------+--------------------|
| 8 9 1 | 5 27 67 | 4 23 236 |
| 7 26 26 | 3 4 1 | 5 9 8 |
| 3 45 45 | 26 9 8 | 126 12 7 |
|--------------------+--------------------+--------------------|
| 49 468 4689 | 1 3 5 | 2789 2478 249 |
| 1 3 489 | 7 6 2 | 89 48 5 |
| 5 27 27 | 9 8 4 | 3 6 1 |
+--------------------------------------------------------------+
# 66 eliminations remain
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sun Jun 27, 2010 12:55 pm Post subject: |
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Three steps with a xy-chain..............
| Quote: | Type 6 UR23 r14c89 with x-wing 3 overlay; r2c8,r4c9<>3
w-wing 26 r2c4 & r4c9 with SL2 r24c5; r2c9<>6
(7=2)r2c5 - r2c4 = r6c4 - (2=1)r6c8 - (1=7)r3c8; r3c6<>7
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A single step solution is an "Almost" xy-chain. View r3c8 as (17=4).
If r3c8=17 then: 7=2)r2c5 - r2c4 = r6c4 - (2=1)r6c8 - (1=7)r3c8; r3c6<>7
If r3c8=4 then: (4)r3c8 - (4=6)r2c9 - r3c79 = (6-7)r3c6; r3c6<>7
Ted
[Edit to include "Almost" xy-chain single step solution.] |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Sun Jun 27, 2010 1:31 pm Post subject: |
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Two steps with a different xy-chain...
| Quote: | turbot/ER(6) (6)r4c9=r6c7 - r6c4=r2c4; r2c9<>6
xy-chain (2=1)r5c8 - (1=7)r3c8 - (7=6)r3c6 - (6=2)r2c4; r6c4<>2 |
(I think the same "almost" play is possible with this chain as it also depends on (4)r3c8 - (4=6)r2c9 - (6=2)r2c4; r6c4<>2)
I did also play a stricter XY game and it was definitely BBDB for me!! Some of these may be extraneous...
| Quote: | Turbot/ER(6) (6)r4c9=r6c7 - r6c4=r2c4; r2c9<>6
x-wing(6); r3c7<>6
x-wing(8); r1c7<>8, r7c37<>8
xy-wing(17-2) r3c8; r6c7<>2, r1c8<>2
m-wing(7) (7=8)r1c2 - r1c8=(8-7)r7c8=r7c7; r1c7<>7
xyz-wing(19-7) r3c7; r2c7<>7
xy-wing(68-9) r2c7; r3c7<>9 |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Mon Jun 28, 2010 9:49 pm Post subject: |
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Type 6 UR (23)
W-Wing (26)
XY-Chain
XY-Wing (679) |
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