Three steps
- Code: Select all
+-------------------------+----------------------+-----------------------+
| 6 5 789 | 2 1 789 | 3 4 79 |
| 1 379 3479 | 5 4679 346 | 8 79 2 |
| 247 23789 234789 | 789 4789 34 | 6 15 15 |
+-------------------------+----------------------+-----------------------+
| 5 6 789 | 4 3 789 | 1 2 78 |
| 3 278 2478 | 6 278 1 | 9 578 4578 |
| d47-2 2789 1 | 789 2789 5 | c47 3 6 |
+-------------------------+----------------------+-----------------------+
| 8 4 37 | 1 5 79 | 2 6 379 |
| 9 127 6 | 3 478 24 | 5 178 1478 |
| a27 1237 5 | 789 46789 246 | b47 1789 134789 |
+-------------------------+----------------------+-----------------------+
1. (2=7)r9c1 - (7=4)r9c7 - r6c7 = (4)r6c1 => -2 r6c1
- Code: Select all
+-------------------------+----------------------+-----------------------+
| 6 5 789 | 2 1 789* | 3 4 c79 |
| 1 379 3479 | 5 4679 346 | 8 79 2 |
| 247 23789 234789 | 789* 4789 34 | 6 15 15 |
+-------------------------+----------------------+-----------------------+
| 5 6 789 | 4 3 789* | 1 2 8-7 |
| 3 278 2478 | 6 278 1 | 9 578 4578 |
| 47 289 1 | 89 289 5 | 47* 3 6 |
+-------------------------+----------------------+-----------------------+
| 8 4 37 | 1 5 a79# | 2 6 b379 |
| 9 127 6 | 3 478 24 | 5 178 1478 |
| 27 1237 5 | 789* 46789 246 | 47* 1789 134789 |
+-------------------------+----------------------+-----------------------+
1. Almost X-chain (7)*
[(7)r4c6^=r1c6-r3c4=r9c4-r9c7=r6c7]
(7-9)r7c6 = r7c9 - (9=7)r1c9
=> -7 r4c9; 14 placements + basics
- Code: Select all
+--------------------+--------------------+------------------+
| 6 5 79 | 2 1 8 | 3 4 79 |
| 1 379 4 | 5 679 36 | 8 79 2 |
| a27 3789-2 28 | a79 a479 34 | 6 1 5 |
+--------------------+--------------------+------------------+
| 5 6 79 | 4 3 79 | 1 2 8 |
| 3 278 28 | 6 278 1 | 9 5 4 |
| 4 289 1 | 89 289 5 | 7 3 6 |
+--------------------+--------------------+------------------+
| 8 4 3 | 1 5 79 | 2 6 79 |
| 9 b27 6 | 3 b478 24 | 5 b78 1 |
| 7-2 1 5 | 789 6789 26 | 4 789 3 |
+--------------------+--------------------+------------------+
3. ALS-XZ rule (279=4)r3c145 - (4=782)r8c258 => -2 r3c2,r9c1; ste