Thank you for sharing your interesting findings!
For this puzzle I do not dare showing my one-stepper (that removes 7 r1c8).
In two steps: after basics
- Code: Select all
,----------------------------------------------------------------,
| 34 349 3479 | 5 da[4[8]] 1 | 6 c7[8] 2 |
| 2 14 147 | 468 3 B(68) | 9 578 58 |
| 6 8 5 | 2 7 9 | 3 4 1 |
|--------------------+-----------------------+-------------------|
| 345 3456 348 | 34678 9 2 | 47 1 58 |
| 9 1345 2 | 13478 a[458] 3578 | 47 b[58] 6 |
| 7 1456 148 | 1468 456-8 B(568) | 2 3 9 |
|--------------------+-----------------------+-------------------|
| 8 2 36 |A(36) 1 4 | 5 9 7 |
| 1 D(5)349 349 | 379 2 C(5)37 | 8 6 34 |
| 34-5 7 3469 | 3689 A(56)-8 A(3568)| 1 2 34 |
'----------------------------------------------------------------'
1. (8=45)r15c5 - (5=8)r5c8 - (8)r1c8 = (8)r1c5 => -8 r69c5
2. (5=638)rb8p189 - (8=65)r26c6 - (5)r8c6 = (5)r8c2 => -5 r9c1; ste