by rjamil » Fri Sep 12, 2025 7:11 pm
POM solution:
- Code: Select all
+----------------+----------------------+-----------------+
| 5 2 4789 | 14689 146789 14679 | 178 3 178 |
| 18 179 3 | 189 1789 5 | 2 4 6 |
| 148 147 6 | 148 2 3 | 9 178 5 |
+----------------+----------------------+-----------------+
| 7 5 489 | 2 1469 1469 | 148 168 3 |
| 124 6 24 | 3 147 8 | 5 17 9 |
| 3 149 489 | 5 14679 14679 | 1478 1678 2 |
+----------------+----------------------+-----------------+
| 9 47 1 | 468 5 46 | 3 2 478 |
| 6 3 5 | 7 148 2 | 148 9 148 |
| 24 8 247 | 149 3 149 | 6 5 147 |
+----------------+----------------------+-----------------+
VT#: (38 2 1 39 1 6 2 6 8)
1) Single-digit POM: 4 @ r1c3456 r2c8 r3c124 r4c3567 r5c135 r6c23567 r7c2469 r8c579 r9c13469
Digit 4 not in 39 Templates => -4 @ r8c7
Single-digit POM: 7 @ r1c35679 r2c25 r3c28 r4c1 r5c58 r6c5678 r7c29 r8c4 r9c39
Digit 7 not in 2 Templates => -7 @ r1c3 r1c5 r1c9 r6c5 r6c8 r7c2 r9c9
Digit 7 in all 2 Templates => 7 @ r7c9 r9c3
Single-digit POM: 8 @ r1c34579 r2c145 r3c148 r4c378 r5c6 r6c378 r7c4 r8c579 r9c2
Digit 8 not in 6 Templates => -8 @ r1c3 r1c4 r2c4 r3c4 r8c5
Digit 8 in all 6 Templates => 8 @ r7c4
+---------------+-----------------+----------------+
| 5 2 49 | 6 1489 1479 | 178 3 18 |
| 18 179 3 | 19 1789 5 | 2 4 6 |
| 148 17 6 | 14 2 3 | 9 178 5 |
+---------------+-----------------+----------------+
| 7 5 489 | 2 1469 149 | 148 168 3 |
| 14 6 2 | 3 147 8 | 5 17 9 |
| 3 19 489 | 5 1469 1479 | 1478 168 2 |
+---------------+-----------------+----------------+
| 9 4 1 | 8 5 6 | 3 2 7 |
| 6 3 5 | 7 14 2 | 18 9 148 |
| 2 8 7 | 149 3 149 | 6 5 14 |
+---------------+-----------------+----------------+
VT#: (33 1 1 6 1 2 2 6 6)
2) Single-digit POM: 4 @ r1c356 r2c8 r3c14 r4c3567 r5c15 r6c3567 r7c2 r8c59 r9c469
Digit 4 not in 6 Templates => -4 @ r1c5
+---------------+-----------------+----------------+
| 5 2 49 | 6 189 1479 | 178 3 18 |
| 18 179 3 | 19 1789 5 | 2 4 6 |
| 148 17 6 | 14 2 3 | 9 178 5 |
+---------------+-----------------+----------------+
| 7 5 489 | 2 1469 149 | 148 168 3 |
| 14 6 2 | 3 147 8 | 5 17 9 |
| 3 19 489 | 5 1469 1479 | 1478 168 2 |
+---------------+-----------------+----------------+
| 9 4 1 | 8 5 6 | 3 2 7 |
| 6 3 5 | 7 14 2 | 18 9 148 |
| 2 8 7 | 149 3 149 | 6 5 14 |
+---------------+-----------------+----------------+
3) Double-digit POM: 4 @ r1c36 r2c8 r3c14 r4c3567 r5c15 r6c3567 r7c2 r8c59 r9c469
and POM: 8 @ r1c579 r2c15 r3c18 r4c378 r5c6 r6c378 r7c4 r8c79 r9c2
Digit 4 not in 4 Templates => -4 @ r1c6 r3c1 r4c3 r5c5 r6c3 r9c4
Digit 4 in all 4 Templates => 4 @ r1c3 r3c4 r5c1
Double-digit POM: 7 @ r1c67 r2c25 r3c28 r4c1 r5c58 r6c67 r7c9 r8c4 r9c3
and POM: 9 @ r1c56 r2c245 r3c7 r4c356 r5c9 r6c2356 r7c1 r8c8 r9c46
Digit 7 not in 1 Template => -7 @ r1c6 *r2c2* r3c8 r5c5 r6c7
Digit 7 in all 1 Template => 7 @ r1c7 r2c5 r3c2 r5c8 r6c6
Double-digit POM: 8 @ r1c59 r2c1 r3c18 r4c378 r5c6 r6c378 r7c4 r8c79 r9c2
and POM: 1 @ r1c69 r2c124 r3c18 r4c5678 r5c5 r6c258 r7c3 r8c579 r9c469
Digit 8 not in 2 Templates => -8 @ r1c9 r3c1 r4c8 r6c8 r8c7
Digit 8 in all 2 Templates => 8 @ r1c5 r2c1 r3c8 r8c9
Double-digit POM: 8 @ r1c5 r2c1 r3c8 r4c37 r5c6 r6c37 r7c4 r8c9 r9c2
and POM: 4 @ r1c3 r2c8 r3c4 r4c567 r5c1 r6c57 r7c2 r8c5 r9c69
Digit 8 not in 1 Template => -8 @ r4c3 r6c7
Digit 8 in all 1 Template => 8 @ r4c7 r6c3
Double-digit POM: 9 @ r1c6 r2c24 r3c7 r4c356 r5c9 r6c25 r7c1 r8c8 r9c46
and POM: 1 @ r1c69 r2c24 r3c1 r4c568 r5c5 r6c258 r7c3 r8c57 r9c469
Digit 9 not in 1 Template => -9 @ r2c4 r4c5 r4c6 r6c2 r9c6
Digit 9 in all 1 Template => 9 @ r1c6 r2c2 r6c5 r9c4
stte
Note: after looking
P.O.'s OTP solution, only double-digit POM -7 @ r2c2 is sufficient at third step.
Phils Folly solver gives following POM steps after basics:
- Code: Select all
Between them r1c3 and r9c4 include all patterns of 4, so patterns of 9 which include both cells can be deleted. As a result, no pattern of 9 includes r2c5 so 9 can be deleted from r2c5
Between them r5c1 and r8c9 include all patterns of 4, so patterns of 1 which include both cells can be deleted. As a result, no pattern of 1 includes r1c5, r6c7 so 1 can be deleted from r1c5, r6c7
Between them r2c2 and r6c6 include all patterns of 7, so patterns of 9 which include both cells can be deleted. As a result, no pattern of 9 includes r6c6 so 9 can be deleted from r6c6
Between them r3c1 and r8c9 include all patterns of 8, so patterns of 4 which include both cells can be deleted. As a result, all remaining patterns of 4 include r1c3 so this can be made equal to 4
4s at r789c9 only ones in row/column => -4 r8c7.
7s at r79c9 only ones in box => -7 r1c9.
8s at r23c1 only ones in row/column => -8 r1c3.
All patterns of 7 include r7c9 so this can be made equal to 7
No pattern of 4 includes r1c5 so 4 can be deleted from r1c5
No pattern of 7 includes r1c5, r6c58 so 7 can be deleted from r1c5, r6c58
Between them r1c3 and r9c4 include all patterns of 4, so patterns of 9 which include both cells can be deleted. As a result, no pattern of 9 includes r2c5 so 9 can be deleted from r2c5
Between them r5c1 and r8c9 include all patterns of 4, so patterns of 1 which include both cells can be deleted. As a result, no pattern of 1 includes r1c5, r6c7 so 1 can be deleted from r1c5, r6c7
Between them r2c2 and r6c6 include all patterns of 7, so patterns of 9 which include both cells can be deleted. As a result, no pattern of 9 includes r6c6 so 9 can be deleted from r6c6
Between them r3c1 and r8c9 include all patterns of 8, so patterns of 4 which include both cells can be deleted. As a result, all remaining patterns of 4 include r1c3 so this can be made equal to 4
Solved!
R. Jamil