

Location: India 
Coming Soon!



Location: 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)



Posts: 53
Location: France  Hello everybody,
I'm really impatient ... Can we know what time PB will be available online? 


Location: India  Puzzle Booklet
The PB should be available at 12 PM Moscow time (0900 GMT) on April 3rd.



Location: India  The test has started and PB is available now. 


Posts: 311
Location: The Netherlands  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 20180403 7:06 PM



Moscow Puzzle Cup 2016 Author
Posts: 157
Location: Russia  Para  20180403 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. 


Posts: 311
Location: The Netherlands  Riad Khanmagomedov  20180403 7:21 PM
Para  20180403 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. 


Location: 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.



Typed Logic Author
Posts: 239
Location: Indonesia  In 11 can the ball cross its own path? 


Posts: 93
Location: USA  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. 


Moscow Puzzle Cup 2016 Author
Posts: 157
Location: Russia  chaotic_iak  20180404 9:20 AM
In 11 can the ball cross its own path?
No. 


Moscow Puzzle Cup 2016 Author
Posts: 157
Location: Russia  ghirsch  20180404 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. 


Location: India  Updated PB
An updated Puzzle Booklet is now available.



Posts: 93
Location: USA  Riad Khanmagomedov  20180403 2:31 PM
ghirsch  20180404 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 20180405 7:32 AM



Typed Logic Author
Posts: 239
Location: 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 20180405 7:38 AM



Typed Logic Author
Posts: 239
Location: 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? 


PR 2020 (Casual and Word) Author
Posts: 339
Location: India  Riad Khanmagomedov  20180404 1:21 PM
chaotic_iak  20180404 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?



Moscow Puzzle Cup 2016 Author
Posts: 157
Location: Russia  chaotic_iak  20180405 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! 


Moscow Puzzle Cup 2016 Author
Posts: 157
Location: Russia  chaotic_iak  20180405 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. 


Moscow Puzzle Cup 2016 Author
Posts: 157
Location: Russia  amitsowani  20180405 9:56 AM
Riad Khanmagomedov  20180404 1:21 PM
chaotic_iak  20180404 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. 


Classics & Regions (PR 2016/17) Author
Posts: 160
Location: Germany  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)? 


Sudoku Grand Prix  Turkish Round Author
Posts: 31
Location: Turkey  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 20180406 3:58 AM



Moscow Puzzle Cup 2016 Author
Posts: 157
Location: Russia  rob  20180406 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. 


Moscow Puzzle Cup 2016 Author
Posts: 157
Location: Russia  bskbri  20180406 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. 


Typed Logic Author
Location: Australia  The answer format checker for Rollball Variation rejects lists of triangles which have (a) triangle(s) in column 10.
Edited by boboquack 20180407 7:10 AM



CTC & TVC Author & Organizer
Posts: 180
Location: Turkiye  Riad Khanmagomedov  20180405 1:40 PM
amitsowani  20180405 9:56 AM
Riad Khanmagomedov  20180404 1:21 PM
chaotic_iak  20180404 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 OptiRoll puzzle; the road act same in here about crossing? 


Posts: 1
Location: Germany  Riad Khanmagomedov  20180403 3:21 PM
Para  20180403 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 20180407 4:29 PM



Location: India  Updated PB
An updated Puzzle Booklet is now available. The word "unique" is added to Puzzle #12



Posts: 69
Location: Japan  I'd like to know when this test will end.
PB mentions "not later than 2400 (of Moscow time) April 11 2018", but the timer in the submission page indicates 24 hours before that. 


Moscow Puzzle Cup 2016 Author
Posts: 157
Location: Russia  yureklis  20180407 2:10 PM
Riad Khanmagomedov  20180405 1:40 PM
amitsowani  20180405 9:56 AM
Riad Khanmagomedov  20180404 1:21 PM
chaotic_iak  20180404 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 OptiRoll 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. 


Moscow Puzzle Cup 2016 Author
Posts: 157
Location: Russia  Joe Average  20180407 4:16 PM
Riad Khanmagomedov  20180403 3:21 PM
Para  20180403 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. 


Moscow Puzzle Cup 2016 Author
Posts: 157
Location: Russia  deu  20180408 8:35 AM
I'd like to know when this test will end.
PB mentions "not later than 2400 (of Moscow time) April 11 2018", but the timer in the submission page indicates 24 hours before that.
As in the PB. 


Posts: 12
Location: 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. 20180408 6:25 PM



Moscow Puzzle Cup 2016 Author
Posts: 157
Location: Russia  .ferchx.  20180408 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 halfcells in the picture). 


Location: India  deu  20180408 8:35 AM
I'd like to know when this test will end.
PB mentions "not later than 2400 (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. 


Posts: 3
Location: Netherlands  It is not possible at the moment to submit answers. The following message you get : "Answer can not be submitted after 11Apr2018 02:29:29 AM IST".
This should be : 12Apr2018. 


Location: India  Hugo  20180411 3:40 AM
It is not possible at the moment to submit answers. The following message you get : "Answer can not be submitted after 11Apr2018 02:29:29 AM IST".
This should be : 12Apr2018. Please try now. 


Posts: 3
Location: Netherlands  Thanks, it is working now. 


Moscow Puzzle Cup 2016 Author
Posts: 157
Location: 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! 


Posts: 12
Location: Spain  Thanks Riad Khanmagomedov. Excelent contest !! 


Posts: 12
Location: Spain  .ferchx.  20180412 5:26 PM
Thanks Riad Khanmagomedov. Excelent contest !!
Edited by .ferchx. 20180412 7:14 PM



Posts: 158
Location: New Zealand  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! 


Posts: 19
Location: Czech Republic  I would like to thank Riad for this contest, just amazing puzzles as usual. :) 
