My solution path has two steps. After basics
- Code: Select all
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| 589 789 1 | 35679 4 689 | 2379 a57 2379 |
| 6 3 c579 | 2 79 1 | 789 b578 4 |
| 589 4 2 | 3579 379 89 | 6 1 379 |
|----------------------+----------------------+----------------------|
| 249 1 49 | 8 29 7 | 5 3 6 |
| 7 289 3 | 69 5 269 | 28 4 1 |
| 28 5 6 | 4 1 3 | 278 9 278 |
|----------------------+----------------------+----------------------|
| 1 79 8 | 379 2379 29 | 4 6 5 |
| 349 6 479 | 1 8 5 | 379 2 379 |
| 2359 279 d579 |d79 6 4 | 1 8-7 3789 |
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1. ALS W-wing (7=5)r1c8 - r2c8 = r2c3 - (5=97)r9c34 => -7 r9c8 [17 placements with basics]
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- Code: Select all
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| 8 79 1 | 35 4 6 |a39 57 2 |
| 6 3 57 | 2 9 1 | 8 57 4 |
|c59 4 2 | 357 37 8 | 6 1 b39 |
|----------------+----------------+----------------|
|d49 1 49 | 8 2 7 | 5 3 6 |
| 7 8 3 | 6 5 9 | 2 4 1 |
| 2 5 6 | 4 1 3 | 7 9 8 |
|----------------+----------------+----------------|
| 1 79 8 | 379 37 2 | 4 6 5 |
|d349 6 479 | 1 8 5 | 9-3 2 379 |
| 359 2 579 | 79 6 4 | 1 8 379 |
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2. ALS W-wing (3=9)r1c7 - (9)r3c9 = (9)r3c1 - (9=43)r48c1 => -3 r8c7; ste