Code: Select all
----------------------------------------------------
47 269 147 | 3 17 8 | 269 5 26
239 23689 1368 | 12 69 5 | 4 2369 7
23579 23569 367 | 27 4 69 | 8 1 236
-----------------+----------------+-----------------
1 356 36 | 57 2 4 | 367 8 9
459 569 2 | 8 357 37 | 1 467 46
8 7 34 | 6 19 19 | 23 234 5
-----------------+----------------+-----------------
237 4 9 | 57-1 8 1367 | 23567 2367 1236
6 238 5 | 9 137 137 | 237 2347 12348
37 1 378 | 4 3567 2 | 35679 3679 368
----------------------------------------------------
(1=2378)r8c2567 - (8=23691)r2c12458 => r7c4 <> 1
This particular ALS application was hard to spot manually, so I’m curious to know if there are more obvious alternative solution strategies that provide the same elimination?