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Administrator
   
Country : India |
Coming Soon!
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Administrator
Country : India | Some notes about April ContestPlease note this contest will have a slightly different format than regular LMI tests.
Key differences from regular LMI tests:
• There is no IB (i.e. no Instructions Booklet). If you have any questions about any puzzle, please ask here.
• The PB (Puzzle Booklet) does not have any password.
• You can download the pdf and start solving. Login at the contest page to start submitting.
• There is no time limit. You can submit until the contest ends.
• There will be some optimizer puzzles. Other puzzles will be very hard (compared to regular LMI tests)
• Same scores will have same rank (i.e. early submissions do not count towards rank)
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Puzlifouk
Posts: 67
Country : France | Hello everybody,
I'm really impatient ... Can we know what time PB will be available online? |
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Administrator
Country : India | Puzzle Booklet
The PB should be available at 12 PM Moscow time (0900 GMT) on April 3rd.
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Administrator
Country : India | The test has started and PB is available now. |
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Para
Posts: 315
Country : The Netherlands | Para posted @ 2018-04-03 7:00 PM For 10. Does minimum mean the amount of digits or the sum of their values?
For 11. Can you place a black triangle in a given cell with a triangle to turn it into a fully black cell?
Edited by Para 2018-04-03 7:06 PM
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Riad Khanmagomedov
Posts: 234
Country : Russia | Para - 2018-04-03 7:00 PM
For 10. Does minimum mean the amount of digits or the sum of their values?
For 11. Can you place a black triangle in a given cell with a triangle to turn it into a fully black cell?
10. Minimize the sum by using fewer digits.
11. Yes. |
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Para
Posts: 315
Country : The Netherlands | Para posted @ 2018-04-03 7:36 PM Riad Khanmagomedov - 2018-04-03 7:21 PM
Para - 2018-04-03 7:00 PM
For 10. Does minimum mean the amount of digits or the sum of their values?
For 11. Can you place a black triangle in a given cell with a triangle to turn it into a fully black cell?
10. Minimize the sum by using fewer digits.
11. Yes.
Sorry, my bad for not clarifying well enough. I meant for when two solutions are tied for score. It says the minimum digits. Does this mean the solution with fewest digits used or the solution with the lowest sum of the digits used. |
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Administrator
Country : India | Puzzle 10 - Minor changes
There are few changes suggested by the author. An updated PB shall be uploaded on April 4th.
Number Range
Numbers from 1 to 5 can be used in coloured cells. Four sets of numbers from 1 to 5 are available. 6 and 7 cannot be used.
Ranking Criteria
- Minimum Value of (A+2B+3C) wilI be used to rank solutions.
- If two solutions have the same value of (A+2B+3C), then the solution using minimum number of digits in coloured cells is considered better.
- If two solutions have the same value of (A+2B+3C) AND use the same number of digits in coloured cells, then the solution which has minimum sum of digits in coloured cells is considered better.
- If two solutions have the same value of (A+2B+3C) AND use the same number of digits in coloured cells AND have the same sum of digits in coloured cells, they will have the same rank.
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chaotic_iak
Posts: 241
Country : Indonesia | In 11 can the ball cross its own path? |
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ghirsch
Posts: 102
Country : United States | ghirsch posted @ 2018-04-04 12:11 PM In 12, is it a requirement to use all pentominoes (i.e. should K always be 8)? If not, should the formula be 2L - K?
Otherwise we are penalized for using more pentominoes, and clearly the more pentominoes, the harder it is to have few black cells. |
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Riad Khanmagomedov
Posts: 234
Country : Russia | chaotic_iak - 2018-04-04 9:20 AM
In 11 can the ball cross its own path?
No. |
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Riad Khanmagomedov
Posts: 234
Country : Russia | ghirsch - 2018-04-04 12:11 PM
In 12, is it a requirement to use all pentominoes (i.e. should K always be 8)? If not, should the formula be 2L - K?
Otherwise we are penalized for using more pentominoes, and clearly the more pentominoes, the harder it is to have few black cells.
K is not necessarily equal to 8. Minimize K + 2L. |
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Administrator
Country : India | Updated PB
An updated Puzzle Booklet is now available.
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ghirsch
Posts: 102
Country : United States | ghirsch posted @ 2018-04-05 7:31 AM Riad Khanmagomedov - 2018-04-03 2:31 PM
ghirsch - 2018-04-04 12:11 PM
In 12, is it a requirement to use all pentominoes (i.e. should K always be 8)? If not, should the formula be 2L - K?
Otherwise we are penalized for using more pentominoes, and clearly the more pentominoes, the harder it is to have few black cells.
K is not necessarily equal to 8. Minimize K + 2L.
Wouldn't the optimal thing trivially be to just use no pentominoes? You can make a loop through all the cells if they are all white, so K and L would both be 0.
I feel like I must be missing something. Edited by ghirsch 2018-04-05 7:32 AM
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chaotic_iak
Posts: 241
Country : Indonesia | I think the missing thing is that the solution to 12 must be unique. It should be added to the PB.
Edited by chaotic_iak 2018-04-05 7:38 AM
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chaotic_iak
Posts: 241
Country : Indonesia | More questions:
3: For the purposes of lawns, each diagonal segment is of the same length as horizontal/vertical segments? Also, can you go diagonally through a white cell, without any lawn next to you?
4: Can names repeat in the grid?
8: For the cells without slashes, the clues point to the longer direction (the direction with more than 1 cell)? Is it possible to make it more similar to Kakuro, so each square is slashed? |
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amitsowani
Posts: 349
Country : India | Riad Khanmagomedov - 2018-04-04 1:21 PM
chaotic_iak - 2018-04-04 9:20 AM
In 11 can the ball cross its own path?
No.
So this translates to - each half white and fully white cell needs to be visited exactly once?
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Riad Khanmagomedov
Posts: 234
Country : Russia | chaotic_iak - 2018-04-05 7:38 AM
I think the missing thing is that the solution to 12 must be unique. It should be added to the PB.
The loop must be unique! |
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Riad Khanmagomedov
Posts: 234
Country : Russia | chaotic_iak - 2018-04-05 7:49 AM
More questions:
3: For the purposes of lawns, each diagonal segment is of the same length as horizontal/vertical segments? Also, can you go diagonally through a white cell, without any lawn next to you?
4: Can names repeat in the grid?
8: For the cells without slashes, the clues point to the longer direction (the direction with more than 1 cell)? Is it possible to make it more similar to Kakuro, so each square is slashed?
3. Yes.
4. No.
8. Yes, to the longer direction. |
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Riad Khanmagomedov
Posts: 234
Country : Russia | amitsowani - 2018-04-05 9:56 AM
Riad Khanmagomedov - 2018-04-04 1:21 PM
chaotic_iak - 2018-04-04 9:20 AM
In 11 can the ball cross its own path?
No.
So this translates to - each half white and fully white cell needs to be visited exactly once?
The white cell can be crossed twice. The path should not overlap with itself. |
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rob
Posts: 170
Country : Germany | rob posted @ 2018-04-06 12:16 AM For the solution code to puzzle 3, would a diagonal of length 2 be counted as 2 (it's two unit diagonals) or as 0 (it's not a unit diagonal)? |
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bskbri
Posts: 34
Country : Turkey | bskbri posted @ 2018-04-06 3:57 AM 11. Rollball variation.
- The ball goes through the centres of all white half cells and all fully white cells. So does it go through all current white cells, or can some of white cells be completely blackened by adding triangles?
- "The ball can roll out of the grid or stay inside the grid" Does this sentence refer to the end of the route?
Edited by bskbri 2018-04-06 3:58 AM
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Riad Khanmagomedov
Posts: 234
Country : Russia | rob - 2018-04-06 12:16 AM
For the solution code to puzzle 3, would a diagonal of length 2 be counted as 2 (it's two unit diagonals) or as 0 (it's not a unit diagonal)?
The diagonal of length 2 is counted as 2. |
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Riad Khanmagomedov
Posts: 234
Country : Russia | bskbri - 2018-04-06 3:57 AM
11. Rollball variation.
- The ball goes through the centres of all white half cells and all fully white cells. So does it go through all current white cells, or can some of white cells be completely blackened by adding triangles?
- "The ball can roll out of the grid or stay inside the grid" Does this sentence refer to the end of the route?
1. First you need to blacken some cells. Then through all the remaining white cells and half cells draw the route.
2. Yes, the end of the route. |
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boboquack
Country : Australia | The answer format checker for Rollball Variation rejects lists of triangles which have (a) triangle(s) in column 10.
Edited by boboquack 2018-04-07 7:10 AM
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yureklis
Posts: 183
Country : Turkey | Riad Khanmagomedov - 2018-04-05 1:40 PM
amitsowani - 2018-04-05 9:56 AM
Riad Khanmagomedov - 2018-04-04 1:21 PM
chaotic_iak - 2018-04-04 9:20 AM
In 11 can the ball cross its own path?
No.
So this translates to - each half white and fully white cell needs to be visited exactly once?
The white cell can be crossed twice. The path should not overlap with itself.
I don’t get it, can the road cross itself or not? Because your first answer is “No”, and the second one is “Yes”. Did you mean that a horizontal road segment and a vertical road segment can cross on a fully white cell? Are we talking about the 2017 April’s Opti-Roll puzzle; the road act same in here about crossing? |
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Joe Average
Posts: 1
Country : Germany | Riad Khanmagomedov - 2018-04-03 3:21 PM
Para - 2018-04-03 7:00 PM
For 10. Does minimum mean the amount of digits or the sum of their values?
For 11. Can you place a black triangle in a given cell with a triangle to turn it into a fully black cell?
10. Minimize the sum by using fewer digits.
11. Yes.
Questions for 11:
Could one also place two triangles in an entirely white cell, turning it entirely black?
And if so, would you name the two trinagles as A and D or as B and ?
Also, in what order are the tringales to be given in the solution code? If it's in order of the path (as the example seems to imply ) then where/how would one put in the triangles creating a full black cell, as the path doesn't visit them ? Edited by Joe Average 2018-04-07 4:29 PM
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Administrator
Country : India | Updated PB
An updated Puzzle Booklet is now available. The word "unique" is added to Puzzle #12
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deu
Posts: 69
Country : Japan | deu posted @ 2018-04-08 8:35 AM I'd like to know when this test will end.
PB mentions "not later than 24-00 (of Moscow time) April 11 2018", but the timer in the submission page indicates 24 hours before that. |
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Riad Khanmagomedov
Posts: 234
Country : Russia | yureklis - 2018-04-07 2:10 PM
Riad Khanmagomedov - 2018-04-05 1:40 PM
amitsowani - 2018-04-05 9:56 AM
Riad Khanmagomedov - 2018-04-04 1:21 PM
chaotic_iak - 2018-04-04 9:20 AM
In 11 can the ball cross its own path?
No.
So this translates to - each half white and fully white cell needs to be visited exactly once?
The white cell can be crossed twice. The path should not overlap with itself.
I don’t get it, can the road cross itself or not? Because your first answer is “No”, and the second one is “Yes”. Did you mean that a horizontal road segment and a vertical road segment can cross on a fully white cell? Are we talking about the 2017 April’s Opti-Roll puzzle; the road act same in here about crossing?
I understand the question as it is translated the translator. If the issue was not the word "own", I understood it clearly. The path can intersect itself (the fully white cell can be crossed twice ), but the path should not overlap with itself. |
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Riad Khanmagomedov
Posts: 234
Country : Russia | Joe Average - 2018-04-07 4:16 PM
Riad Khanmagomedov - 2018-04-03 3:21 PM
Para - 2018-04-03 7:00 PM
For 10. Does minimum mean the amount of digits or the sum of their values?
For 11. Can you place a black triangle in a given cell with a triangle to turn it into a fully black cell?
10. Minimize the sum by using fewer digits.
11. Yes.
Questions for 11:
Could one also place two triangles in an entirely white cell, turning it entirely black?
And if so, would you name the two trinagles as A and D or as B and ?
Also, in what order are the tringales to be given in the solution code? If it's in order of the path (as the example seems to imply ) then where/how would one put in the triangles creating a full black cell, as the path doesn't visit them ?
It's possible. The order in the solution code is arbitrary. |
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Riad Khanmagomedov
Posts: 234
Country : Russia | deu - 2018-04-08 8:35 AM
I'd like to know when this test will end.
PB mentions "not later than 24-00 (of Moscow time) April 11 2018", but the timer in the submission page indicates 24 hours before that.
As in the PB. |
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-.ferchx.-
Posts: 12
Country : Spain | For 11:
It's possible N=0?
Then a route with lenght=2 and N=0, i.e., is better that other with lenght= 40 and N=1?
Edited by -.ferchx.- 2018-04-08 6:25 PM
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Riad Khanmagomedov
Posts: 234
Country : Russia | -.ferchx.- - 2018-04-08 6:25 PM
For 11:
It's possible N=0?
Then a route with lenght=2 and N=0, i.e., is better that other with lenght= 40 and N=1?
A route must pass through all the white cells and half cells. If N=0, then the length of route cannot be 2 (this is much less than the number of white cells and white half-cells in the picture ). |
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Administrator
Country : India | deu - 2018-04-08 8:35 AM
I'd like to know when this test will end.
PB mentions "not later than 24-00 (of Moscow time) April 11 2018", but the timer in the submission page indicates 24 hours before that.
Fixed the end time. It should show correct time now. |
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Hugo
Posts: 5
Country : The Netherlands | Hugo posted @ 2018-04-11 3:40 AM It is not possible at the moment to submit answers. The following message you get : "Answer can not be submitted after 11-Apr-2018 02:29:29 AM IST".
This should be : 12-Apr-2018. |
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Administrator
Country : India | Hugo - 2018-04-11 3:40 AM
It is not possible at the moment to submit answers. The following message you get : "Answer can not be submitted after 11-Apr-2018 02:29:29 AM IST".
This should be : 12-Apr-2018. Please try now. |
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Hugo
Posts: 5
Country : The Netherlands | Hugo posted @ 2018-04-11 6:22 PM Thanks, it is working now. |
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Riad Khanmagomedov
Posts: 234
Country : Russia | Preliminary results have been announced. Congratulations to the new winner - Kosei, also Tomoya and Ken!
I would like to thank all the participants and everyone who helped with the Contest. Special thanks to Deb for making the checking of optimisers much easier and quicker! |
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-.ferchx.-
Posts: 12
Country : Spain | Thanks Riad Khanmagomedov. Excelent contest !! |
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-.ferchx.-
Posts: 12
Country : Spain | -.ferchx.- - 2018-04-12 5:26 PM
Thanks Riad Khanmagomedov. Excelent contest !! Edited by -.ferchx.- 2018-04-12 7:14 PM
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kiwijam
Posts: 187
Country : New Zealand | kiwijam posted @ 2018-04-13 7:04 AM Oh dear, I didn't see this contest was happening. Is there a mailing list to announce contests I could join?
Congratulations to the winners! |
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kousek-nebe
Posts: 20
Country : Czech Republic | I would like to thank Riad for this contest, just amazing puzzles as usual. :-) |
Riad Khanmagomedov's April Contest — 3rd to 11th April 2018