Login Register LMI Home •Monthly Tests & RatingsSearch RecentLMI Book - Sudoku Mix Vol #1WSPC 2017
Riad's September Sudoku Contest 2019 (6th - 10th Sep) Score Discuss
Pentakaideca (20th - 24th Sep) has started Discuss

Riad Khanmagomedov's April Contest — 3rd to 11th April 2018
   LMI Tests -> Annual Competitions44 posts • Page 1 of 2 • 1 2
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 11th April 2018 @ 2018-04-04 1:31 PM (#24644 - in reply to #24642) (#24644) Top


Moscow Puzzle Cup 2016 Author

Posts: 133
10020
Location: 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.
Administrator
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 11th April 2018 @ 2018-04-04 2:06 PM (#24646 - in reply to #24644) (#24646) Top


200050010010020
Location: India

Updated PB


An updated Puzzle Booklet is now available.

ghirsch
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 11th April 2018 @ 2018-04-05 7:31 AM (#24648 - in reply to #24644) (#24648) Top




Posts: 88
20202020
Location: USA
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
chaotic_iak
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 11th April 2018 @ 2018-04-05 7:38 AM (#24649 - in reply to #24577) (#24649) Top



NEW, HUGE, AND CHALLENGING Author

Posts: 228
10010020
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 2018-04-05 7:38 AM
chaotic_iak
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 11th April 2018 @ 2018-04-05 7:49 AM (#24650 - in reply to #24577) (#24650) Top



NEW, HUGE, AND CHALLENGING Author

Posts: 228
10010020
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?
amitsowani
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 11th April 2018 @ 2018-04-05 9:56 AM (#24651 - in reply to #24643) (#24651) Top



Irregular Variations (SM 15/16) Author

Posts: 322
10010010020
Location: 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?
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 11th April 2018 @ 2018-04-05 1:30 PM (#24652 - in reply to #24649) (#24652) Top


Moscow Puzzle Cup 2016 Author

Posts: 133
10020
Location: 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!
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 11th April 2018 @ 2018-04-05 1:38 PM (#24653 - in reply to #24650) (#24653) Top


Moscow Puzzle Cup 2016 Author

Posts: 133
10020
Location: 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.
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 11th April 2018 @ 2018-04-05 1:40 PM (#24654 - in reply to #24651) (#24654) Top


Moscow Puzzle Cup 2016 Author

Posts: 133
10020
Location: 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.
rob
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 11th April 2018 @ 2018-04-06 12:16 AM (#24656 - in reply to #24654) (#24656) Top


Classics & Regions (PR 2016/17) Author

Posts: 152
1002020
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)?
bskbri
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 11th April 2018 @ 2018-04-06 3:57 AM (#24657 - in reply to #24577) (#24657) Top


Sudoku Grand Prix - Turkish Round Author

Posts: 30
20
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 2018-04-06 3:58 AM
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 11th April 2018 @ 2018-04-06 2:29 PM (#24659 - in reply to #24656) (#24659) Top


Moscow Puzzle Cup 2016 Author

Posts: 133
10020
Location: 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.
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 11th April 2018 @ 2018-04-06 2:36 PM (#24660 - in reply to #24657) (#24660) Top


Moscow Puzzle Cup 2016 Author

Posts: 133
10020
Location: 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.
boboquack
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 11th April 2018 @ 2018-04-07 7:03 AM (#24662 - in reply to #24577) (#24662) Top




Location: 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
yureklis
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 11th April 2018 @ 2018-04-07 2:10 PM (#24663 - in reply to #24654) (#24663) Top


CTC & TVC Author & Organizer

Posts: 180
10020202020
Location: Turkiye
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?
Joe Average
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 11th April 2018 @ 2018-04-07 4:16 PM (#24665 - in reply to #24633) (#24665) Top




Posts: 1

Location: 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
Administrator
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 11th April 2018 @ 2018-04-07 7:25 PM (#24666 - in reply to #24577) (#24666) Top


200050010010020
Location: India

Updated PB


An updated Puzzle Booklet is now available. The word "unique" is added to Puzzle #12

deu
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 11th April 2018 @ 2018-04-08 8:35 AM (#24667 - in reply to #24577) (#24667) Top




Posts: 69
202020
Location: Japan
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.
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 11th April 2018 @ 2018-04-08 3:21 PM (#24668 - in reply to #24663) (#24668) Top


Moscow Puzzle Cup 2016 Author

Posts: 133
10020
Location: 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.
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 11th April 2018 @ 2018-04-08 3:43 PM (#24669 - in reply to #24665) (#24669) Top


Moscow Puzzle Cup 2016 Author

Posts: 133
10020
Location: 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.
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 11th April 2018 @ 2018-04-08 3:45 PM (#24670 - in reply to #24667) (#24670) Top


Moscow Puzzle Cup 2016 Author

Posts: 133
10020
Location: 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.
-.ferchx.-
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 11th April 2018 @ 2018-04-08 6:25 PM (#24671 - in reply to #24577) (#24671) Top




Posts: 10

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.- 2018-04-08 6:25 PM
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 11th April 2018 @ 2018-04-09 2:56 PM (#24674 - in reply to #24671) (#24674) Top


Moscow Puzzle Cup 2016 Author

Posts: 133
10020
Location: 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).
Administrator
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 11th April 2018 @ 2018-04-10 7:00 AM (#24676 - in reply to #24667) (#24676) Top


200050010010020
Location: 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.
Hugo
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 11th April 2018 @ 2018-04-11 3:40 AM (#24689 - in reply to #24577) (#24689) Top




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 11-Apr-2018 02:29:29 AM IST".
This should be : 12-Apr-2018.
44 posts • Page 1 of 2 • 1 2
Jump to forum :
Search this forum
Printer friendly version

Best blackjack strategies https://onlineblackjack.money/strategies/.

Online casino roulette for Australian players https://aucasinosonline.com/roulette/