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Riad Khanmagomedov
Posts: 234
 
Country : Russia | Puzlifouk - 2019-04-04 10:05 PM
A remark about Magic Tapa : because we always have R>=r and C>=c, minimizing (|R-r|-r + |C-c|-c) is always exactly the same thing than minimizing (R-2r+C-2c). Right?
Convert the expression as you like. |
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Riad Khanmagomedov
Posts: 234
Country : Russia | anurag - 2019-04-04 11:47 PM
ROFL.. you are right. That's a print error. Perhaps it was intended like this: the closing pipe comes after the third 'r'. |R-r-r| + C-c-c|
There is no printer error. Some of the puzzles I've made in 2015 and corrected in 2019. I modified the problem, but the expression is correct. |
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Riad Khanmagomedov
Posts: 234
Country : Russia | kiwijam - 2019-04-05 3:47 AM
At The Levers: Does the small example have two solutions? When I put "3-3" on the diagonal lever it also works, or is this not allowed?
Thanks for the comment, I'll correct the example. |
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anurag
Posts: 136
Country : India | anurag posted @ 2019-04-05 2:38 PM Strange. Are you saying sub-zero scores are valid and considered as more rewarding than a score of 0? |
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kiwijam
Posts: 187
Country : New Zealand | kiwijam posted @ 2019-04-05 3:13 PM Anurag, please show respect to Riad, I'm much enjoying the effort he has done for this competition.
I think the Magic Tapa expression is clear and makes sense as it is (range minus minimum). As he says, you can maximize whatever you like but the final scores will be based on the official expression.
And yes, a score of -1 would be better than a score of 0 if you can achieve that. If there are other negative scores then the most negative score would be the best. |
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Puzlifouk
Posts: 67
Country : France | I do not know what "score" you are talking about when you say "And yes, a score of -1 would be better than a score of 0 if you can achieve that. If there are other negative scores then the most negative score would be the best."
If the score is the final score to maximize (that is | R-r | -r + | C-c | -c), then personally I have never seen that -1> 0 nor -10 > -5 !?! ... But you are free: as you say the expression is clear, everybody will interpret as he wants. |
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anurag
Posts: 136
Country : India | anurag posted @ 2019-04-05 5:13 PM That's Correct and clears the doubt, at least for some.
The whole purpose of asking questions is to be able to complete the set and I am sure puzzle solving is not an objectionable activity. For any unrelated suggestions/objections, I believe personal emails are a better medium. |
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Administrator
  
Country : India | anurag - 2019-04-04 11:47 PM
ROFL.. We request everyone to please stick to "English" on this forum. Thanks. |
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3strikerz
Posts: 8
Country : South Korea | anurag - 2019-04-03 11:06 PM
Ships: As it is not mentioned on the file, I assume the fragments are pulled out straight without rotation and can be put back the same way as they are. Also, the column clues consider all 10 cells and not just the 5-cell strip.
Probably everyone might have understood the puzzle description, but since I didn't and need some clarification;
A )Is the red clues in the 5x10 fragments intended to be solved as 5x10 battleship clues, or is the red clues the equivalent of 10x10 original battleship clues?
B )Is it okay for ships to be 'fragmented' in the 5x10 clues? |
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Puzlifouk
Posts: 67
Country : France | Very sorry all, the expression has to be minimized! So everything is clear and ok, I will not comment this point any more. |
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Riad Khanmagomedov
Posts: 234
Country : Russia | In puzzle 11, I will remove the brackets, if it is principled. Minimize the expression R – 2r + C – 2c. James rightly noted that the minimum can be negative.
In puzzle 7, the red clues extend to 10 cells.
Edited by Riad Khanmagomedov 2019-04-05 7:20 PM
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randomperson1729
Posts: 11
Country : United States | I have a question about "at the levers."
If two digits are on one side of the balance, is each one multiplied by its distance from the balance? So if there are two digits next to each other on the pivot, with the closest one unit away from the pivot, would the total for that side be thw closer digit plus twice the outer digit? |
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ghirsch
Posts: 102
Country : United States | ghirsch posted @ 2019-04-06 12:13 AM It looks like the example for dice masyu has multiple solutions, can you confirm if this is a mistake or if I am misunderstanding a rule?  (Screen Shot 2019-04-05 at 2.41.26 PM.png)Attachments ----------------  Screen Shot 2019-04-05 at 2.41.26 PM.png (32KB - 1 downloads) |
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deu
Posts: 69
Country : Japan | deu posted @ 2019-04-06 11:55 AM In Fragments of Seas, is it allowed to rotate and/or reflect fragments? |
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kiwijam
Posts: 187
Country : New Zealand | kiwijam posted @ 2019-04-06 2:07 PM @randomperson1729: Exactly right.
@ghirsch: The Dice Masyu example has multiple solutions, but the big puzzle has only one solution.
@deu: No, the 10x5 rectangles can not be rotated or reflected. |
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Administrator
Country : India | Puzzle BookletAn updated version of Puzzle Booklet can now be downloaded.
Changes:
1) Puzzle 6: Correction to the example
2) Puzzle 11: Removed the brackets for the expression to be minimized
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Badacoin
Posts: 4
Country : France | 7. Fragments of Sea:
Can two grids use the same ship type?
8. Dice Masyu
What happens when you place a dice on top of an existing circle? Does the position of this existing circle have to match the position of a circle on the dice? |
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Puzlifouk
Posts: 67
Country : France | A small question again, about "Fragments of seas" : is there 1 fragment from each grid, or is it possible that 2 fragments come from the same grid, and no fragment come from another grid? |
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rakesh_rai
Posts: 774
Country : India | Puzlifouk - 2019-04-07 1:10 PM
A small question again, about "Fragments of seas" : is there 1 fragment from each grid, or is it possible that 2 fragments come from the same grid, and no fragment come from another grid? one fragment from each grid |
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Badacoin
Posts: 4
Country : France | I'd like some clarification about Dice Masyu.
What happens when you place a dice on top of an existing circle? Must the position of the existing circle match the position of a circle on the dice?
Do all existing circles in the grid belong to a dice?
Edit: Sorry for the double post, I thought I made a mistake and didn't correctly submit the first one
Edited by Badacoin 2019-04-07 3:29 PM
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rakesh_rai
Posts: 774
Country : India | Badacoin - 2019-04-07 1:54 AM
7. Fragments of Sea:
Can two grids use the same ship type?
One type in each grid. The answer to your question is "NO." |
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GaS
Posts: 24
Country : ITALY | GaS posted @ 2019-04-07 7:03 PM Hi all,
what about multiple submission for optimizer puzzles? There is reduction of potential score, as for usual LMI contest, or are allowed without impact on the score?
Thanks
Gabriele |
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rakesh_rai
Posts: 774
Country : India | GaS - 2019-04-07 7:03 PM
Hi all,
what about multiple submission for optimizer puzzles? There is reduction of potential score, as for usual LMI contest, or are allowed without impact on the score?
Thanks
Gabriele
Last submission will be considered. There is no penalty as there is no instant grading. |
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Eugene Porter
Posts: 11
Country : United States | Hi there I am enjoying your contest. It is very well done. I do have a question about Dice Maysu. If you cover an existing circle with a half domino is it still 'seen'? For example, if one were to place a domino of six such that a pre-existing circle would be the middle of that six after placement --- would the middle circle be covered ? Would the circle be 'in play' along with the rest of the domino ? Or would one not be allowed to place a domino of 6 in such a location?
Thanks -E |
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kiwijam
Posts: 187
Country : New Zealand | kiwijam posted @ 2019-04-08 10:40 AM In Dice Masyu, every given circle must match a half-domino circle.
e.g. You cannot place a 6-domino such that the centre cell of the 6 covers an existing circle.
And you cannot have an existing circle with no half-domino covering it. |
@ 2019-04-05 2:11 PM (#26847 - in reply to #26841) (#26847) Top