The lazy way

- Code: Select all
+----------------------+----------------------+----------------------+
| 2457 5-4 2357 | 3579 1 6 | 3479 8 3479 |
| 9 48# 1 | 378 2 78 | 6 347# 5 |
| 578 6 3578 | 35789 4 5789 | 1 2 379 |
+----------------------+----------------------+----------------------+
| 1 3 28 | 79 5 479 | 479 6 28 |
| 285 9 258 | 6 3 147* | 47 17-4* 28 |
| 6 7 4 | 19 8 2 | 39 5 139 |
+----------------------+----------------------+----------------------+
| 48 1 6 | 2 7 38 | 5 9 34 |
| 3 458# 578 | 158* 9 158* | 2 147*# 6 |
| 57 2 9 | 4 6 35-1 | 8 137 137 |
+----------------------+----------------------+----------------------+
1. Finned X-wing: (1)r58\c68, fr8c4 => -1 r9c6
2. X-Wing: (4)r28\c28 => -4 r1c2, r5c8; lcls, 1 placement
- Code: Select all
+-------------------+----------------------+---------------------+
| e247 5 237 | 379 1 6 | 379 8 3479 |
| 9 48 1 | 378 2 78 | 6 347 5 |
| 78 6 378 | 35789 4 5789 | 1 2 379 |
+-------------------+----------------------+---------------------+
| 1 3 28 | 79 5 479 | 479 6 28 |
| e28-5 9 258 | 6 3 147 | 47 17 28 |
| 6 7 4 | 19 8 2 | 39 5 139 |
+-------------------+----------------------+---------------------+
| d48 1 6 | 2 7 38 | 5 9 c34 |
| 3 48 b57 | 158 9 158 | 2 b47 6 |
| a57 2 9 | 4 6 35 | 8 137 137 |
+-------------------+----------------------+---------------------+
3. (5=7)r9c1 - (57-4)r8c38 = r7c9 - r7c1 = (42)r15c1 => -5 r5c1; 16 placements
- Code: Select all
+-----------------+------------------+-----------------+
| 27 5 23 | 39 1 6 | 79 8 4 |
| 9 4 1 | 8 2 7 | 6 3 5 |
| 78 6 38 | 35+9 4 59 | 1 2 79 |
+-----------------+------------------+-----------------+
| 1 3 28 | 7 5 49 | 49 6 28 |
| 28 9 5 | 6 3 14 | 47 17 28 |
| 6 7 4 | 19 8 2 | 3 5 19 |
+-----------------+------------------+-----------------+
| 4 1 6 | 2 7 8 | 5 9 3 |
| 3 8 7 | 15 9 15 | 2 4 6 |
| 5 2 9 | 4 6 3 | 8 17 17 |
+-----------------+------------------+-----------------+
4. BUG+1 => +9 r3c4; ste