ronk wrote:[r4c5]-3-(UR:[r4c9]=3|7=[r4c7])-7-(ALS:[r4c4]=7|3=[r46c4])-3-[r4c5] implying r4c5<>3
Interesting, I must confess that I haven't thought about it this way
ronk wrote:vidarino wrote:I'm just going to give this one a bump back on track... Any other takers on solving it, except tarek (thanks!)?
Sorry I got off-topic there asking gsf about his solver. Actually thought about starting a thread, but figured that would be a bit presumptuous.
Just as I was about to give up, I noticed a Unique Rectangle and Almost Locked set at this point ...
vidarino wrote:Nice one!
This is exactly why I ask for humans to try to solve the puzzles. There's no flopping way in heck I'll be able to program my solver to use tricks like that.
*--------------------------------------------------------------------------*
| 5 1269 1369 | 8 1237 27 | 4 3679 1379 |
| 12346 8 136 | 234 9 247 | 1367 5 137 |
| 134 19 7 | 5 134 6 | 139 8 2 |
|------------------------+------------------------+------------------------|
| 1278 1257 4 | 29 278 3 | 12579 279 6 |
| 1267 3 1568 | 2469 2467 245789 | 1279 2479 15789 |
| 9 267 568 | 1 2467 24578 | 237 2347 3578 |
|------------------------+------------------------+------------------------|
| 136 169 13569 | 7 2346 249 | 8 2369 359 |
| 367 4 3689 | 2369 5 289 | 23679 1 379 |
| 3678 5679 2 | 369 368 1 | 35679 3679 4 |
*--------------------------------------------------------------------------*
Graeme wrote:My solver solved this without needing to resort to brute-force trial & error [edit: .................] I also needed to set the guess impliction to use hidden singles as well as naked-singles.
vidarino wrote:I'm just going to give this one a bump back on track... Any other takers on solving it, except tarek (thanks!)?