Stuck on this one

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Stuck on this one

Postby shawntown » Wed Aug 10, 2022 1:55 am

What would you do next? (Hopefully my notes are all correct).

https://imgur.com/a/to4dUal
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Re: Stuck on this one

Postby Leren » Wed Aug 10, 2022 8:33 am

Code: Select all
*-----------*
|3..|756|.2.|
|2.6|149|..5|
|..5|283|...|
|---+---+---|
|.2.|834|.5.|
|..4|.7.|...|
|...|.6.|..8|
|---+---+---|
|56.|318|9..|
|..9|425|..1|
|...|697|5..|
*-----------*

Not too easy solution path from your position, which is OK, but there are a couple of Skyscrapers on offer and a UR in r56c67.

Leren
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Re: Stuck on this one

Postby jco » Wed Aug 10, 2022 5:49 pm

I found a solution to this puzzle (3......2...61.9..5....8.....2.8.4.5...4.7........6...8.6....9....94.5..1.....7... SE = 7.3)
in 4 steps (apart from basics). Steps 1 and 2 were skyscrapers on 3 and 9. In the third step I found a nice almost hidden set (2369) at row 5. The fourth step uses an almost locked set at row 6.
Hidden Text: Show
After basics

Code: Select all
.------------------------------------------------------.
| 3     W1489    18   | 7   5  6  | 148    2     V49   |
| 2      78      6    | 1   4  9  | 378    378    5    |
| 1457-9 14579   157  | 2   8  3  | 1467   14679  4679 |
|---------------------+-----------+--------------------|
|T1679   2       17   | 8   3  4  | 167    5     U679  |
| 15689  158-39  4    | 59  7  12 | 1236   1369  w369  |
| 1579   1357-9 t1357 | 59  6  12 | 1247-3 1479-3 8    |
|---------------------+-----------+--------------------|
| 457    6       257  | 3   1  8  | 9      47     247  |
| 78     378     9    | 4   2  5  | 3678   3678   1    |
| 148    1348   u1238 | 6   9  7  | 5      348   v234  |
'------------------------------------------------------'

1. Skyscraper (3): r6c3 = r9c3 - r9c9 = r5c9 => -3 r5c2, r6c78 [tags t,u,v,w]
2. Skyscraper (9): r4c1 = r4c9 - r1c9 = r1c2 => -9 r3c1, -9 r45c2 [tags [T,U,V,W]
----
Code: Select all
.-------------------------------------------------------.
|  3       1489   18   | 7   5  6  |e148    2     d49   |
|  2       78     6    | 1   4  9  | 378    378    5    |
|  1457    14579  157  | 2   8  3  |e1467   14679  4679 |
|----------------------+-----------+--------------------|
| b1679    2      17   | 8   3  4  | 167    5     c679  |
|ga1569-8 h158    4    | 59  7  12 |g123-6 g1369  g369  |
|  1579    1357   1357 | 59  6  12 |f1247   1479   8    |
|----------------------+-----------+--------------------|
|  457     6      257  | 3   1  8  | 9      47     247  |
|  78      378    9    | 4   2  5  | 3678   3678   1    |
|  148     1348   1238 | 6   9  7  | 5      348    234  |
'-------------------------------------------------------'

3. (6)r5c1 = (6-9)r4c1 = (9)r4c9 - (9=4)r1c9 - (4)r13c7 = (4-2)r6c7 = (2*369-8)r5c1789 = (8)r5c2
=> -6* r5c7, -8 r5c1 [tags a ... h] [5 placements]
----
Code: Select all
.--------------------------------------------------------------------.
| 3      149    8      | 7      5      6      | 14     2      49     |
| 2      7      6      | 1      4      9      | 38     38     5      |
| 145    1459   15     | 2      8      3      | 1467   14679  4679   |
|----------------------+----------------------+----------------------|
| 1679   2     e17     | 8      3      4      | 167    5      679    |
| 1569   8      4      | 59     7      12     | 123    1369   369    |
|f1579  f15     3      |f59     6     f12     |a147-2 b1479   8      |
|----------------------+----------------------+----------------------|
| 457    6     d257    | 3      1      8      | 9     c47     247    |
| 78     3      9      | 4      2      5      | 678    678    1      |
| 148    14     12     | 6      9      7      | 5      348    234    |
'--------------------------------------------------------------------'

4. (4)r6c7 = (4)r6c8 - (4=7)r7c8 - (7)r7c3 = (7)r4c3 - (7=1592)r6c1246 => -2 r6c7; lclste [tags a...f]

Nice puzzle.
JCO
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