Asian Sudoku Championship 2025
Sudoku Champs 2024
10 Parallel Universe12 posts • Page 1 of 1 • 1
@ 2017-10-04 10:43 PM (#23478) (#23478) Top

prasanna16391



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prasanna16391 posted @ 2017-10-04 10:43 PM

Round 10: Parallel Universe

Please post your questions about this round here.

Corrections for v2:
* 14. Fix multiple solutions in example.
* 8. Add to rules as below.
@ 2017-10-06 9:19 AM (#23539 - in reply to #23478) (#23539) Top

kiwijam



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kiwijam posted @ 2017-10-06 9:19 AM

1) Four Winds Optimizer: Clarification - how many vertical segments are in the example solution, 6 or 10?

14) Doppelblock Optimizer: Are we minimizing the number of white cells touching a shaded cell (I count 14 in the example) or the number of edges between white and shaded cells (I count 30)?
In either case, the example solution is not unique.
@ 2017-10-06 2:56 PM (#23544 - in reply to #23539) (#23544) Top

prasanna16391



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prasanna16391 posted @ 2017-10-06 2:56 PM

kiwijam - 2017-10-06 9:19 AM

1) Four Winds Optimizer: Clarification - how many vertical segments are in the example solution, 6 or 10?

14) Doppelblock Optimizer: Are we minimizing the number of white cells touching a shaded cell (I count 14 in the example) or the number of edges between white and shaded cells (I count 30)?
In either case, the example solution is not unique.


1) Consider it as 30 1-unit segments.

14) The former must be minimized. You're right about the example, we will get it fixed in version 2. Thanks!
@ 2017-10-08 5:51 AM (#23568 - in reply to #23478) (#23568) Top

deu



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deu posted @ 2017-10-08 5:51 AM

8) Tents Optimizer
What is the definition of "chain"?
1. Can a chain have any branches?
2. Can any loops be formed? If so, how do we count its length?
@ 2017-10-09 1:07 PM (#23604 - in reply to #23568) (#23604) Top

prasanna16391



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prasanna16391 posted @ 2017-10-09 1:07 PM

deu - 2017-10-08 5:51 AM

8) Tents Optimizer
What is the definition of "chain"?
1. Can a chain have any branches?
2. Can any loops be formed? If so, how do we count its length?


A Chain is a single continuous path without crossings and branches (these structures can happen but won't be included in the count). The path must contain a tree or a tent in every cell along it. It can form a loop. The length is always counted as number of cells containing tents + number of cells containing trees along the path.

We will incorporate some of this into version 2. Thanks!
@ 2017-10-09 1:39 PM (#23605 - in reply to #23478) (#23605) Top

bskbri



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bskbri posted @ 2017-10-09 1:39 PM

is this a chain? tent-tree-tent-tree-tree-tree-tent
@ 2017-10-09 6:16 PM (#23615 - in reply to #23604) (#23615) Top

Para



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Para posted @ 2017-10-09 6:16 PM

prasanna16391 - 2017-10-09 1:07 PM

deu - 2017-10-08 5:51 AM

8) Tents Optimizer
What is the definition of "chain"?
1. Can a chain have any branches?
2. Can any loops be formed? If so, how do we count its length?


A Chain is a single continuous path without crossings and branches (these structures can happen but won't be included in the count). The path must contain a tree or a tent in every cell along it. It can form a loop. The length is always counted as number of cells containing tents + number of cells containing trees along the path.

We will incorporate some of this into version 2. Thanks!


I assume a branch on a loop could be counted as you could draw from it to the loop and follow the loop around, making a single path that never backtracks.
@ 2017-10-10 12:17 AM (#23619 - in reply to #23605) (#23619) Top

prasanna16391



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prasanna16391 posted @ 2017-10-10 12:17 AM

bskbri - 2017-10-09 1:39 PM

is this a chain? tent-tree-tent-tree-tree-tree-tent


Yes.
@ 2017-10-10 12:17 AM (#23620 - in reply to #23615) (#23620) Top

prasanna16391



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prasanna16391 posted @ 2017-10-10 12:17 AM

Para - 2017-10-09 6:16 PM

prasanna16391 - 2017-10-09 1:07 PM

deu - 2017-10-08 5:51 AM

8) Tents Optimizer
What is the definition of "chain"?
1. Can a chain have any branches?
2. Can any loops be formed? If so, how do we count its length?


A Chain is a single continuous path without crossings and branches (these structures can happen but won't be included in the count). The path must contain a tree or a tent in every cell along it. It can form a loop. The length is always counted as number of cells containing tents + number of cells containing trees along the path.

We will incorporate some of this into version 2. Thanks!


I assume a branch on a loop could be counted as you could draw from it to the loop and follow the loop around, making a single path that never backtracks.


Yes.
@ 2017-10-10 4:05 AM (#23624 - in reply to #23568) (#23624) Top

forcolin




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forcolin posted @ 2017-10-10 4:05 AM

deu - 2017-10-08 5:51 AM


1. Can a chain have any branches?


A chain can't, but a tree can, I suppose
@ 2017-10-10 1:15 PM (#23646 - in reply to #23478) (#23646) Top

Angus



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Angus posted @ 2017-10-10 1:15 PM

Will the optimization requirements in the contest all be the same as the ones in the examples?
@ 2017-10-10 2:40 PM (#23653 - in reply to #23646) (#23653) Top

prasanna16391



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prasanna16391 posted @ 2017-10-10 2:40 PM

Angus - 2017-10-10 1:15 PM

Will the optimization requirements in the contest all be the same as the ones in the examples?


Yes.
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