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Riad Khanmagomedov's April Contest — 3rd to 10th April 2019
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Administrator
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 10th April 2019 @ 2019-04-03 4:34 PM (#26829 - in reply to #26827) (#26829) Top


200050010010020
Location: India

Puzzle Booklet


The Puzzle Booklet is available here: http://logicmastersindia.com/lmitests/dl.asp?attachmentid=775

You may start solving the puzzles now.

The submission page shall be set up soon and will be enabled thereafter. Please watch out for an announcement here.

Puzlifouk
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 10th April 2019 @ 2019-04-03 5:18 PM (#26830 - in reply to #26822) (#26830) Top




Posts: 49
2020
Location: France
Great!
anurag
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 10th April 2019 @ 2019-04-03 11:06 PM (#26831 - in reply to #26822) (#26831) Top




Posts: 96
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Location: India
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.
anurag
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 10th April 2019 @ 2019-04-03 11:19 PM (#26832 - in reply to #26822) (#26832) Top




Posts: 96
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Location: India
Distyle: these puzzles usually do not allow 2x2 squares of shaded cells (except paint by number). What about this one? There is no mention.
Solving the example does not help deuce the rule either way as it can be solved uniquely without having to consider 2x2 squares.

Edited by anurag 2019-04-03 11:31 PM
kiwijam
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 10th April 2019 @ 2019-04-04 5:01 AM (#26833 - in reply to #26822) (#26833) Top




Posts: 147
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Location: New Zealand
Pentocolour:
1) Can a black pentomino diagonally touch an orange pentomino with the same letter?
2) Please explain how to calculate K. In mathematics, two different-sized squares are 'similar'. Is this the count of different white shapes (different after rotation and reflection)? So if I have a horizontal white domino and a vertical white domino, then K=1?
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 10th April 2019 @ 2019-04-04 2:09 PM (#26834 - in reply to #26827) (#26834) Top


Moscow Puzzle Cup 2016 Author

Posts: 133
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Location: Russia
Puzlifouk - 2019-04-03 11:13 AM

Hello everybody,
Is it good for today? I'm so impatient: I took my leave for that.

I wish you success!
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 10th April 2019 @ 2019-04-04 2:10 PM (#26835 - in reply to #26831) (#26835) Top


Moscow Puzzle Cup 2016 Author

Posts: 133
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Location: Russia
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.

Ships can be rotated. The column clues consider all 10 cells.
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 10th April 2019 @ 2019-04-04 2:10 PM (#26836 - in reply to #26832) (#26836) Top


Moscow Puzzle Cup 2016 Author

Posts: 133
10020
Location: Russia
anurag - 2019-04-03 11:19 PM

Distyle: these puzzles usually do not allow 2x2 squares of shaded cells (except paint by number). What about this one? There is no mention.
Solving the example does not help deuce the rule either way as it can be solved uniquely without having to consider 2x2 squares.

The 2 x 2 squares can be shaded.
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 10th April 2019 @ 2019-04-04 2:11 PM (#26837 - in reply to #26833) (#26837) Top


Moscow Puzzle Cup 2016 Author

Posts: 133
10020
Location: Russia
kiwijam - 2019-04-04 5:01 AM

Pentocolour:
1) Can a black pentomino diagonally touch an orange pentomino with the same letter?
2) Please explain how to calculate K. In mathematics, two different-sized squares are 'similar'. Is this the count of different white shapes (different after rotation and reflection)? So if I have a horizontal white domino and a vertical white domino, then K=1?

1) No.
2) If there are several white dominoes in the grid, then K=1. If several different white triminoes, then K=2. White square 1 x 1 and white square 2 x 2 - different shapes, K=2.
If you still have doubts about the translation, I am ready to comment.
Léotte
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 10th April 2019 @ 2019-04-04 2:20 PM (#26838 - in reply to #26822) (#26838) Top




Posts: 1

Location: France
At the levers : can you check for the solution? I may be mistaken (of course!), but I really see no solution here :/
anurag
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 10th April 2019 @ 2019-04-04 2:54 PM (#26839 - in reply to #26835) (#26839) Top




Posts: 96
20202020
Location: India
No, not ships. I was asking about the 5x10 fragments. But nevermind, I solved it. It was fun.
Administrator
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 10th April 2019 @ 2019-04-04 9:22 PM (#26840 - in reply to #26839) (#26840) Top


200050010010020
Location: India

Submission page


The Submission page is now ready: http://logicmastersindia.com/2019/04Contest/

You can submit your answer keys now. There is no instant grading in this test.

(Potential) Results link shows possible points based on submissions, even if incorrect.

Some of the answer keys (mainly for Optimizers) may show red validation messages. They can be ignored if you think your answer key is right.

Submissions should be completed by 10th April midnight (Moscow time).

Puzlifouk
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 10th April 2019 @ 2019-04-04 10:05 PM (#26841 - in reply to #26822) (#26841) Top




Posts: 49
2020
Location: France
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?
anurag
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 10th April 2019 @ 2019-04-04 11:47 PM (#26842 - in reply to #26841) (#26842) Top




Posts: 96
20202020
Location: India
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|
kiwijam
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 10th April 2019 @ 2019-04-05 3:47 AM (#26843 - in reply to #26822) (#26843) Top




Posts: 147
1002020
Location: New Zealand
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?
anurag
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 10th April 2019 @ 2019-04-05 9:32 AM (#26844 - in reply to #26841) (#26844) Top




Posts: 96
20202020
Location: India
It appears the objective here is to maximize the row min and column min, as also indicated by the revealing title. Maximize (r+c) could be a simpler scoring formula.
L00ping007
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 10th April 2019 @ 2019-04-05 1:07 PM (#26845 - in reply to #26843) (#26845) Top




Posts: 5

Location: France
kiwijam - 2019-04-04 11:47 PM

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?


I agree, the 2 solutions work for me

Léotte - 2019-04-04 10:20 AM

At the levers : can you check for the solution? I may be mistaken (of course!), but I really see no solution here :/


Same for me ... My step by step logic way leads to a dead end


Do we miss something here ?
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 10th April 2019 @ 2019-04-05 2:10 PM (#26846 - in reply to #26838) (#26846) Top


Moscow Puzzle Cup 2016 Author

Posts: 133
10020
Location: Russia
Léotte - 2019-04-04 2:20 PM

At the levers : can you check for the solution? I may be mistaken (of course!), but I really see no solution here :/

4 testers solved this puzzle.
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 10th April 2019 @ 2019-04-05 2:11 PM (#26847 - in reply to #26841) (#26847) Top


Moscow Puzzle Cup 2016 Author

Posts: 133
10020
Location: 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.
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 10th April 2019 @ 2019-04-05 2:11 PM (#26848 - in reply to #26842) (#26848) Top


Moscow Puzzle Cup 2016 Author

Posts: 133
10020
Location: 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.
Riad Khanmagomedov
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 10th April 2019 @ 2019-04-05 2:12 PM (#26849 - in reply to #26843) (#26849) Top


Moscow Puzzle Cup 2016 Author

Posts: 133
10020
Location: 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.
anurag
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 10th April 2019 @ 2019-04-05 2:38 PM (#26850 - in reply to #26848) (#26850) Top




Posts: 96
20202020
Location: India
Strange. Are you saying sub-zero scores are valid and considered as more rewarding than a score of 0?
kiwijam
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 10th April 2019 @ 2019-04-05 3:13 PM (#26851 - in reply to #26822) (#26851) Top




Posts: 147
1002020
Location: New Zealand
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.
Puzlifouk
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 10th April 2019 @ 2019-04-05 4:45 PM (#26852 - in reply to #26822) (#26852) Top




Posts: 49
2020
Location: 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.
anurag
Subject: Re: Riad Khanmagomedov's April Contest — 3rd to 10th April 2019 @ 2019-04-05 5:13 PM (#26853 - in reply to #26852) (#26853) Top




Posts: 96
20202020
Location: India
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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