ronk wrote:"generalized" VWXYZ wing
Interesting puzzle, my solver did not catch that, I thought at first that the type 4 unique rectangle was the culprit but then I discovered that I tweaked my solver to search at the same time for an ALS xy rule which -I thought- was easier, it brought out this, which is a good example of the ALS xy rule also:
- Code: Select all
*-----------------------------------------------------------------*
| 5 3 178 | 168 2 167 | 9 14678 146 |
| 678 2 4 | 1689 3 1679 | 67 5 16 |
| 678 168 9 | 1568 4 1567 | 23 1678 23 |
|---------------------+---------------------+---------------------|
| 69 69 35 | 35 1 4 | 8 2 7 |
| 2348 1458 1358 | 7 6 235 | 35 9 345 |
| 2347 *45 357 | 235 9 8 | 1 *46 3456 |
|---------------------+---------------------+---------------------|
| 49 49 358 | 123 78 123 | 2567 ^167 1256 |
| 38 %58 6 | 4 %78 123 |-257 ^17 9 |
| 1 7 2 | 69 5 69 | 4 3 8 |
*-----------------------------------------------------------------*
Eliminating 7 from r8c7(ALS-XY A=456 in r6c2,r6c8 B=167 in r8c8,r7c8 C=578 in r8c5,r8c2 x=6 y=5 z=7)
I don't think this is simpler, as we r talking about 3 goups of 6 cells compared to 2 groups & 5 cells... so I need to return to tweak the solver a bit more.........
Tarek