Here is a puzzle a little easier than the previous one. Your resolutions are welcome.
4...6.91........8.1.3.....4.3.2.1.48....8....78.5.6.2.9.....8.7.2........47.5...2
Robert
puzzle: Show
+------------------------+-------------------------+--------------------------+
| 4 57 8 | 37 6 2 | 9 1 35 |
| 256 5679 2569 | 13479 134 34579 | 3567 8 356 |
| 1 5679 3 | 789 9-7 5789 | 2 d567 4 |
+------------------------+-------------------------+--------------------------+
| 56 3 569 | 2 a79 1 | b567 4 8 |
| 256 1569 124569 | 3479 8 3479 | 13567 c35679 13569 |
| 7 8 149 | 5 4-3 6 | A13 2 139 |
+------------------------+-------------------------+--------------------------+
| 9 156 156 | 1346 2 34 | 8 356 7 |
| 38 2 156 | 136789 D13 3789 | 4 3569 13569 |
| 38 4 7 | C13689 5 389 | B136 369 2 |
+------------------------+-------------------------+--------------------------+
+------------------+-----------------------+----------------------+
| 4 b57 8 | 37 6 2 | 9 1 c35 |
| a56* 9 2 | 1347 13 3457 | 567* 8 d35-6 |
| 1 567 3 | 78 9 578 | 2 567 4 |
+------------------+-----------------------+----------------------+
| 56* 3 9 | 2 7 1 | 56* 4 8 |
| 2 56 4 | 39 8 39 | 157-6 567 156 |
| 7 8 1 | 5 4 6 | 3 2 9 |
+------------------+-----------------------+----------------------+
| 9 1 56 | 346 2 34 | 8 356 7 |
| 38 2 56 | 136789 13 3789 | 4 3569 156 |
| 38 4 7 | 13689 5 389 | 1-6 369 2 |
+------------------+-----------------------+----------------------+
Cenoman wrote:Four simple steps
.-----------------------.-----------------------.----------------------.
| 4 e57 8 | f37 6 2 | 9 1 35 |
| 256 d5679 2569 | d13479 134 d34579 | d3567 8 356 |
| 1 5679 3 | 789 cf79 5789 | 2 567 4 |
:-----------------------+-----------------------+----------------------:
| 56 3 ah56(9) | 2 bg79 1 | c567 4 8 |
| 256 1569 124569 | 3479 8 3479 | 13567 35679 13569 |
| 7 8 Aa[1]-49 | 5 BD3(4) 6 | B13 2 139 |
:-----------------------+-----------------------+----------------------:
| 9 156 156 | 1346 2 34 | 8 356 7 |
| 38 2 156 | 136789 D13 3789 | 4 3569 13569 |
| 38 4 7 | C13689 5 389 | C136 369 2 |
'-----------------------'-----------------------'----------------------'
(1)r6c3
||
(4)r6c3 - (4=31)r6c57 - r9c7 = r9c4 - (13=4)r86c5 !
||
(9)r6-4c3 = (9-7)r4c5 = r3c5&r4c7 - r2c467=2 - r1c2 = (79)b2p18 - r4c5 = (9)r4c3 !
=> +1 r6c3
c1 c7
.---------------.----------------------.------------------------.
| 4 57 8 | 7-3 6 2 | 9 1 ae[(3)]5 |
| b56* 9 2 | 1347 e1(3) 3457 | b576* 8 a[#6]5-3 | R2
| 1 567 3 | 78 9 578 | 2 567 4 |
:---------------+----------------------+------------------------:
| b56* 3 9 | 2 7 1 | b56* 4 8 | R4
| 2 56 4 | 39 8 39 | 1567 567 156 |
| 7 8 1 | 5 4 6 | 3 2 9 |
:---------------+----------------------+------------------------:
| 9 1 56 | d643 2 d43 | 8 356 7 |
| 38 2 56 | 136789 d3'1 3789 | 4 3569 d61'5 |
| 38 4 7 | d1389'6 5 389 | cd61 d39'6 2 |
'---------------'----------------------'------------------------'
c1 c4 c7
.---------------.----------------------.-----------------------.
| 4 57 8 | 7-3 6 2 | 9 1 eh(3)5 |
| a56* 9 2 | 1347 c1[3] 3457 | a576* 8 d5#6-3 | R2
| 1 567 3 | 78 9 578 | 2 567 4 |
:---------------+----------------------+-----------------------:
| a56* 3 9 | 2 7 1 | a56* 4 8 | R4
| 2 56 4 | 39 8 39 | 1567 567 156 |
| 7 8 1 | 5 4 6 | 3 2 9 |
:---------------+----------------------+-----------------------:
| 9 1 56 | b43'6 2 b43 | 8 356 7 |
| 38 2 56 | 136789 b3'1 3789 | 4 3569 g16'5 |
| 38 4 7 | a13896* 5 389 | ag16* f39#6 2 | R9
'---------------'----------------------'-----------------------'
(6)R249\c147 - (6=431)b8p135 - (1=3)r2c5
||
(6-3)r2c9 = (3)r1c9
||
(6)r9c8 - (6=15)b9p76 - (5=3)r1c9
=> -3 r1c4,r2c9; stte
+-------------------+-----------------------+-----------------------+
| 4 57 8 | 37 6 2 | 9 1 35 |
| 256 5679 2569 | 13479 13-4 34579 | 3567 8 356 |
| 1 5679 3 | 789 79 5789 | 2 567 4 |
+-------------------+-----------------------+-----------------------+
| 56 3 569 | 2 79 1 | 567 4 8 |
| 256 1569 124569 | 379-4 8 379-4 | 13567 35679 13569 |
| 7 8 19-4 | 5 (+4-3) 6 | (13) 2 139 |
+-------------------+-----------------------+-----------------------+
| 9 156 156 | 1346 2 34 | 8 356 7 |
| 38 2 156 | 136789 (13) 3789 | 4 3569 3569(1) |
| 38 4 7 | 13689 5 389 | 36(1) 369 2 |
+-------------------+-----------------------+-----------------------+
+---------------+---------------------+--------------------+
| 4 57 8 | 37 6 2 | 9 1 35 |
| 56 5679 2 | 13479 13 34579 | 3567 8 356 |
| 1 5679 3 | 789 9(7) 5789 | 2 56(7) 4 |
+---------------+---------------------+--------------------+
| 56 3 569 | 2 9(7) 1 | 56-7 4 8 |
| 2 156 4 | 39-7 8 39-7 | 1567 569(7) 1569 |
| 7 8 19 | 5 4 6 | 13 2 139 |
+---------------+---------------------+--------------------+
| 9 156 156 | 1346 2 34 | 8 356 7 |
| 38 2 156 | 136789 13 3789 | 4 3569 1569 |
| 38 4 7 | 13689 5 389 | 16 369 2 |
+---------------+---------------------+--------------------+
+----------------+------------------+--------------------+
| 4 7(5) 8 | 37 6 2 | 9 1 3(5) |
| (56) 9 2 | 1347 13 3457 | (567) 8 35-6 |
| 1 567 3 | 78 9 578 | 2 (567) 4 |
+----------------+------------------+--------------------+
| 56 3 9 | 2 7 1 | 56 4 8 |
| 2 56 4 | 39 8 39 | 1567 567 156 |
| 7 8 1 | 5 4 6 | 3 2 9 |
+----------------+------------------+--------------------+
| 9 1 56 | 346 2 34 | 8 356 7 |
| 38 2 56 | 136789 13 3789 | 4 3569 156 |
| 38 4 7 | 13689 5 389 | 16 369 2 |
+----------------+------------------+--------------------+
+---------------+---------------+----------------+
| 4 57 8 | 37 6 2 | 9 1 35 |
| 5(6) 9 2 | 14 13 3457 | 7(6) 8 35 |
| 1 567 3 | 78 9 578 | 2 67 4 |
+---------------+---------------+----------------+
| 5(6) 3 9 | 2 7 1 | 5(6) 4 8 |
| 2 56 4 | 39 8 39 | 157-6 67 16 |
| 7 8 1 | 5 4 6 | 3 2 9 |
+---------------+---------------+----------------+
| 9 1 56 | 46 2 34 | 8 35 7 |
| 38 2 56 | 789 13 789 | 4 359 16 |
| 38 4 7 | 16 5 89 | 1-6 39 2 |
+---------------+---------------+----------------+