- Code: Select all
.-----------------.-----------.---------------.
| b56 7 2 | 4 a69 8 | 1 3 5-9 |
| 1 9 4 | 7 3 5 | 2 6 8 |
| 8 3 56 | 1 69 2 | 59 4 7 |
:-----------------+-----------+---------------:
| c569 156 7 | 2 4 3 | 8 15 d569 |
| 4 2 16 | 5 8 9 | 67 17 3 |
| 3 8 59 | 6 7 1 | 59 2 4 |
:-----------------+-----------+---------------:
| 57 45 358 | 9 1 6 | 34 578 2 |
| 579 15 1589 | 3 2 4 | 67 578 56 |
| 2 46 36 | 8 5 7 | 34 9 1 |
'-----------------'-----------'---------------'
Take your pick from these variants of Cenoman's solution:
H-Wing: (6=5)r1c1 - (5=9)r1c9 - r4c9 = (9)r4c1 => -6 r4c1 (Cenoman's)
M2-Wing: (9=6)r1c5 - r1c1 = (6-9)r4c1 = (9)r4c9 => -9 r1c9 (shown)
M3-Wing: (5=9)r1c9 - r4c9 = (9-6)r4c1 = (6)r1c1 => -5 r1c1
S-Wing: (6)r4c1 = r1c1 - (6=9)r1c5 - r1c9 = (9)r4c9 => -6 r4c9, -9 r4c1
L2-Wing: (6)r1c1 = (6-9)r4c1 = r4c9 - r1c9 = (9)r1c5 => -6 r1c5
L3-Wing: (6)r4c1 = (6-5)r1c1 = (5-9)r1c9 = (9)r4c9 => -6 r4c9, -9 r4c1
L3-Wing: (5)r1c9 = (5-6)r1c1 = (6-9)r4c1 = (9)r4c9 => -5 r4c9, -9 r1c9
Did I miss any?