RSW wrote:1. UR(58)r39c78 (type 3) forms a locked set with 19r3c6 => -19r3c5 -9r3c12
Very nice step 1 !
Several AIC's are needed to get the same resolution state.
RSW wrote:- Code: Select all
+----------+----------+-----------+
| 1 7 5 | 8 4 2 | 3 6 9 |
| 3 4 9 | 6 5 1 | 7 2 8 |
| 2 8 6 | 7 3 9 | 15 15 4 |
+----------+----------+-----------+
|c45 39 7 | 1 9-2 8 | 6 34 d25 |
| 56 39 28 | 4 269 7 | 18 138 25 |
|b46 1 28 | 5 a26 3 | 9 48 7 |
+----------+----------+-----------+
| 8 6 4 | 3 7 5 | 2 9 1 |
| 9 5 1 | 2 8 6 | 4 7 3 |
| 7 2 3 | 9 1 4 | 58 58 6 |
+----------+----------+-----------+
2. (2=6)r6c5 - (6=4)r6c1 - (4=5)r4c1 - (5=2)r4c9 => -2r4c5; stte
You could have finished in the same family of techniques:
2. Extended UR(158)r359c78, using single internal: +3r5c8; ste