Extreme 18C

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Extreme 18C

Postby Yogi » Tue May 06, 2025 9:06 pm

8.......24...3........5..1...1...56.......9.....7........8.4..7.6....3...9.2.....

Code: Select all
.---------.---------.---------.
| .  .  . | .  5  1 | .  2  . |
| .  .  3 | 4  .  . | .  .  . |
| .  .  . | .  .  . | .  .  . |
:---------+---------+---------:
| 2  7  . | .  .  . | .  .  . |
| .  .  . | 3  .  . | 9  .  . |
| .  1  . | .  .  . | 4  .  . |
:---------+---------+---------:
| 8  .  5 | .  2  . | .  .  . |
| .  .  . | .  .  . | .  7  1 |
| .  .  . | .  .  . | 6  .  . |
'---------'---------'---------'

Hodoku rates this puzzle 4000+ in its system.
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Re: Extreme 18C

Postby pjb » Tue May 06, 2025 11:35 pm

Can I assume that the puzzle in line format is the one you intended?
Phil
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Re: Extreme 18C

Postby P.O. » Wed May 07, 2025 7:03 am

there is only one difficult step among many basic steps
basics:
Hidden Text: Show
Code: Select all
( n3r9c6   n7r5c8 )

intersections:
((((8 0) (8 3 7) (2 4 5 7 8)) ((8 0) (9 3 7) (4 5 7 8)))
 (((8 0) (4 5 5) (2 4 8 9)) ((8 0) (5 5 5) (1 2 4 6 8)) ((8 0) (6 5 5) (1 2 4 6 8 9)))
 (((6 0) (7 5 8) (1 6 9)) ((6 0) (9 5 8) (1 6 7)))
 (((5 0) (8 4 8) (1 5 9)) ((5 0) (8 6 8) (1 5 7 9)))
 (((4 0) (8 3 7) (2 4 7 8)) ((4 0) (9 3 7) (4 5 7 8)))
 (((2 0) (6 7 6) (1 2 4 8)) ((2 0) (6 8 6) (2 3 4 8)))
 (((2 0) (4 5 5) (2 4 8 9)) ((2 0) (5 5 5) (1 2 4 8)) ((2 0) (6 5 5) (1 4 8 9)))
 (((1 0) (1 2 1) (1 3 5 7)) ((1 0) (2 2 1) (1 2 5 7))) ( n9r4c6 ))

QUAD COL: ((1 6 2) (1 6 7)) ((5 6 5) (1 5 6)) ((6 6 5) (1 5 6)) ((8 6 8) (1 5 7))
(((2 6 2) (1 2 6 7 8)) ((3 6 2) (2 6 7 8)))

intersection:
((((7 0) (1 5 2) (1 4 7 9)) ((7 0) (1 6 2) (1 6 7))))

QUINTE BOX: ((7 1 7) (1 2 3 5)) ((7 2 7) (2 3 5)) ((7 3 7) (2 3 5)) ((8 1 7) (1 2 7)) ((9 1 7) (1 5 7))
(((8 3 7) (2 4 7 8)) ((9 3 7) (4 5 7 8)))

intersections:
((((7 0) (8 1 7) (1 2 7)) ((7 0) (9 1 7) (1 5 7)))
 (((7 0) (2 3 1) (2 5 6 7 9)) ((7 0) (3 3 1) (2 3 6 7 9))) ( n7r4c2 ))

QUAD COL: ((1 2 1) (1 3 5)) ((2 2 1) (1 2 5)) ((3 2 1) (2 3)) ((7 2 7) (2 3 5))
(((5 2 4) (2 3 4 5 8)) ((6 2 4) (3 4 5 8)))

QUINTE ROW: ((6 2 4) (4 8)) ((6 5 5) (1 4 8)) ((6 7 6) (1 2 4 8)) ((6 8 6) (2 3 4 8)) ((6 9 6) (1 3 4 8))
(((6 1 4) (3 5 6 9)) ((6 3 4) (3 5 6 9)) ((6 6 5) (1 5 6)))

intersection:
((((3 0) (6 8 6) (2 3 4 8)) ((3 0) (6 9 6) (1 3 4 8))))

Code: Select all
8      135    3569   1469   1479   167    46     3459   2               
4      125    25679  169    3      28     678    589    5689           
2369   23     23679  469    5      28     4678   1      34689           
23     7      1      34     248    9      5      6      48             
2356   48     2356   13456  1248   156    9      7      148             
569    48     569    7      148    56     1248   2348   1348           
1235   235    235    8      169    4      126    259    7               
127    6      48     159    179    157    3      2489   1489           
157    9      48     2      167    3      1468   458    14568           

167r9c5 => r8c1 <> 2
 r9c5=1 - 248r456c5 - r4c4{n4 n3} - r4c1{n3 n2}
 r9c5=6 - r7n6{c5 c7} - r1c7{n6 n4} - r3n4{c79 c4} - r4c4{n4 n3} - r4c1{n3 n2}
 r9c5=7 - c1n7{r9 r8}

bte:
Hidden Text: Show
Code: Select all
( n2r8c8   n2r6c7 )

intersection:
((((1 0) (7 7 9) (1 6)) ((1 0) (9 7 9) (1 4 6 8))))

QUAD ROW: ((8 1 7) (1 7)) ((8 4 8) (1 5 9)) ((8 5 8) (1 7 9)) ((8 6 8) (1 5 7))
(((8 9 9) (4 8 9)))

( n9r7c8 )

intersection:
((((5 0) (9 8 9) (4 5 8)) ((5 0) (9 9 9) (4 5 6 8))))

PAIR ROW: ((7 5 8) (1 6)) ((7 7 9) (1 6)) 
(((7 1 7) (1 2 3 5)))

PAIR COL: ((4 9 6) (4 8)) ((8 9 9) (4 8)) 
(((2 9 3) (5 6 8 9)) ((3 9 3) (3 4 6 8 9)) ((5 9 6) (1 4 8)) ((6 9 6) (1 3 4 8)) ((9 9 9) (4 5 6 8)))

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Re: Extreme 18C

Postby eleven » Wed May 07, 2025 9:09 am

Code: Select all
 *------------------------------------------------------------------------*
 |  8      135   3569    |  1469    1479   167   |  46     3459   2       |
 |  4      125   25679   |  169     3      28    |  678    589    5689    |
 |  2369   23    23679   |  469     5      28    |  4678   1      34689   |
 |-----------------------+-----------------------+------------------------|
 |  23     7     1       |  34     #48+2   9     |  5      6     #48      |
 |  2356 a#48    2356    |  3456-1 a1248   56-1  |  9      7    a#48+1    |
 |  569   #48    569     |  7      #48+1   56    |  1248   2348   1348    |
 |-----------------------+-----------------------+------------------------|
 |  1235   235   235     |  8       169    4     |  126    259    7       |
 |  127    6     48      |  159     179    157   |  3      2489   1489    |
 |  157    9     48      |  2       167    3     |  1468   458    14568   |
 *------------------------------------------------------------------------*

DP 48 r56c2,r46c5,r45c9: externals 1r5c9, 1r6c5, 2r4c5
1r5c9|r6c5 == 2r4c5 - (2=148)r5c259 => -1r5c46, bte
[edit] typo
Last edited by eleven on Wed May 07, 2025 10:57 pm, edited 1 time in total.
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Re: Extreme 18C

Postby Yogi » Wed May 07, 2025 9:23 pm

Yes, Phil, sorry. The String Puzzle is the one intended.
I don't know how to edit the original post, or even if that is possible.
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Re: Extreme 18C

Postby eleven » Wed May 07, 2025 11:00 pm

Yogi wrote:I don't know how to edit the original post, or even if that is possible.

Click on the [Edit] button of your post (top right, when logged in) - just did it in the above post.
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