| View previous topic :: View next topic |
| Author |
Message |
daj95376
Joined: 23 Aug 2008
Posts: 3854
|
 Posted: Sun Aug 01, 2010 6:03 pm Post subject: Puzzle 10/08/01: Bonus XY+ |
 |
|
| Code: | +-----------------------+
| 9 . . | 4 2 . | . . . |
| . . 3 | 9 . . | . 4 . |
| . 7 4 | 8 1 5 | . . 9 |
|-------+-------+-------|
| 7 6 9 | 5 . 2 | 4 . . |
| 1 . 2 | . 8 7 | . . . |
| . . 8 | 1 9 . | 6 . . |
|-------+-------+-------|
| . . . | 3 . 8 | 1 . . |
| . 8 . | . . . | . 3 . |
| . . 7 | . . . | . . 4 |
+-----------------------+
|
Play this puzzle online at the Daily Sudoku site |
|
| Back to top |
|
 |
peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
|
| Posted: Sun Aug 01, 2010 9:04 pm Post subject: |
|
|
Went hunting for another almost-turbot move .. this time a grouped kite 
| Code: | *--------------------------------------------------------------------*
| 9 15 156 | 4 2 3 | 7 18 1568 |
| 8 125* 3 | 9 7 6 | 25* 4 125* |
| 26 7 4 | 8 1 5 | 3 26* 9 |
|----------------------+----------------------+----------------------|
| 7 6 9 | 5 3 2 | 4 18 18 |
| 1 4 2 | 6 8 7 | 59 59 3 |
| 35 35 8 | 1 9 4 | 6 27& 27 |
|----------------------+----------------------+----------------------|
| 2456 59-2 56 | 3 456 8 | 1 25679* 2567 |
| 2456 8 156 | 7 456 19 | 259 3 256 |
| 356 1359 7 | 2 56 19 | 8 569 4 |
*--------------------------------------------------------------------* |
Almost grouped kite - kite has pincers r2c2 and r7c8 eliminating 2 in r7c2 with fin r6c8. Fin forces 9 in r7c2 via SL on 7 and 9.
| Code: |
GroupedKite(2)[(2)r2c2=r2c79 - r3c8=r7c8]=(2-7)r6c8=(7-9)r7c8=r7c2; r7c2<>2 |
|
|
| Back to top |
|
|
Mogulmeister
Joined: 03 May 2007
Posts: 1151
|
| Posted: Mon Aug 02, 2010 10:32 am Post subject: |
|
|
On reflection, I see mine has used a section of Peter's nice AIC/Grouped Kite: I think I'll call this the bastard cousin:
(2=6)r3c8-(6=59)r59c8-(9)r7c8=(9-2)r7c2=r2c2-(2)r3c1; r3c1<>2
Especially as I might even have stopped before going into the red.  |
|
| Back to top |
|
|
daj95376
Joined: 23 Aug 2008
Posts: 3854
|
| Posted: Mon Aug 02, 2010 3:12 pm Post subject: |
|
|
This puzzle was a real eye opener for me because I almost never check for Kraken fish. While reviewing Peter's solution, I discovered an almost/ Kraken X-Wing with one direct fin cell and one indirect fin cell. The indirect fin cell is the one discovered by Peter.
| Code: | Almost/Kraken X-Wing c18\r37 w/fins (#)r8c1 and (@)r6c7
+-----------------------------------------------------------------------+
| 9 15 156 | 4 2 3 | 7 18 1568 |
| 8 125 3 | 9 7 6 | 25 4 125 |
| *26 7 4 | 8 1 5 | 3 *26 9 |
|-----------------------+-----------------------+-----------------------|
| 7 6 9 | 5 3 2 | 4 18 18 |
| 1 4 2 | 6 8 7 | 59 59 3 |
| 35 35 8 | 1 9 4 | 6 @27 27 |
|-----------------------+-----------------------+-----------------------|
| *2456 59-2 56 | 3 456 8 | 1 *25679 2567 |
| #2456 8 156 | 7 456 19 | 259 3 256 |
| 356 1359 7 | 2 56 19 | 8 569 4 |
+-----------------------------------------------------------------------+
# 58 eliminations remain
|
The best my solver could do was find a network equivalent to the Kraken X-Wing:
(2-9)r7c2 = { (9-7)r7c8 = (7-2)r6c7 } = (2)r3c8 - r3c1 = r78c1 - (2)r7c2
The part in blue results in all of the 2s in [c1] being eliminated. The part in green turns this contradiction into a discontinuous loop.
I didn't see Mogulmeister's ANP(). Nice find! |
|
| Back to top |
|
|
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
