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Riad Khanmagomedov's April Contest — 15th to 22nd April 202267 posts • Page 1 of 3 • 1 2 3
@ 2022-04-13 9:52 PM (#30522) (#30522) Top

prasanna16391



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prasanna16391 posted @ 2022-04-13 9:52 PM



This annual contest shall take place from 15-22 April 2022.
More details shall be shared in subsequent posts soon.

@ 2022-04-13 9:54 PM (#30523 - in reply to #30522) (#30523) Top

prasanna16391



Posts: 1604
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Country : India

prasanna16391 posted @ 2022-04-13 9:54 PM

Contest page


The Puzzle Booklet shall be available just before the start of the contest at the Contest page: https://logicmastersindia.com/live/?contest=M202204Contest

@ 2022-04-13 9:56 PM (#30524 - in reply to #30522) (#30524) Top

prasanna16391



Posts: 1604
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Country : India

prasanna16391 posted @ 2022-04-13 9:56 PM

Some notes about April Contest 2022

Please note this contest will have a slightly different format than regular LMI tests.

Key differences from regular LMI tests:
1. There is no IB (i.e. no Instructions Booklet). If you have any questions about any puzzle, please ask here in the forum.
2. The PB (Puzzle Booklet) does not have any password.
3. You can download the pdf and start solving. Login at the contest page and click on "Start test" to start submitting.
4. There is no time limit other than the 1 week duration. You can submit until the contest ends.
5. There will be some optimizer puzzles. Other puzzles will be very hard (compared to regular LMI tests)
6. Same scores will have same rank (i.e. early submissions do not count towards rank)

Other important points:
7. There shall be no instant grading in this test.
8. There shall be no online solving interface (like penpa) provided for this test.
9. The score page shall be made available later.
10. There shall be 10 pages in the Puzzle Booklet.
11. Participants can submit answers any number of times. The last submission shall be considered for scoring.
12. There shall be no separate notification on submitting answers.

@ 2022-04-14 9:23 PM (#30525 - in reply to #30522) (#30525) Top

Gotroch



Posts: 81
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Country : Czech Republic

Gotroch posted @ 2022-04-14 9:23 PM

I+am+looking+forward+to+solving+Riad%27s+puzzles%2E+%F0%9F%91%8D%0D%0ABut+for+me+this+contest+would+be+much+better+if+the+first+9+puzzles+had+greater+impact+on+the+results+%28current+format+is+all+about+three+optimizer+puzzles%29%2E%0D%0AI+am+missing+good+old+Puzzle+Marathon+contests%2C+harder+puzzles+like+Riad%27s+would+be+perfect+for+it+and+I+would+enjoy+the+contest+more+if+I+can+compare+myself+with+others+on+all+puzzles%2E
@ 2022-04-14 11:01 PM (#30526 - in reply to #30522) (#30526) Top

Veronika



Posts: 7

Country : Slovakia

Veronika posted @ 2022-04-14 11:01 PM

Looking forward to the puzzles!!
@ 2022-04-14 11:59 PM (#30528 - in reply to #30522) (#30528) Top

prasanna16391



Posts: 1604
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Country : India

prasanna16391 posted @ 2022-04-14 11:59 PM

The puzzles are available now. All the best to everyone!
@ 2022-04-15 1:07 AM (#30529 - in reply to #30522) (#30529) Top

CJK



Posts: 10

Country : Germany

CJK posted @ 2022-04-15 1:07 AM

Is it allowed to use programs or similar things, especially for the optimization puzzles?
@ 2022-04-15 5:03 AM (#30530 - in reply to #30522) (#30530) Top

YogaRamadhan



Posts: 1

Country : Indonesia

YogaRamadhan posted @ 2022-04-15 5:03 AM

In+the+example+of+puzzle+number+7%2C+Floating+Clouds%2C+it+seems+that+the+2%C3%972+cloud+is+moving+diagonally+from+the+2nd+to+the+3rd+diagram%2E+Is+that+an+error%3F+They+may+only+move+horizontally+and%2For+vertically%2C+i+suppose%2E
@ 2022-04-15 9:12 AM (#30531 - in reply to #30530) (#30531) Top

prasanna16391



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Country : India

prasanna16391 posted @ 2022-04-15 9:12 AM

If they move horizontally "and" vertically that basically results in a possible diagonal movement.
@ 2022-04-15 2:12 PM (#30532 - in reply to #30522) (#30532) Top

Manitary



Posts: 1

Country : Italy

Manitary posted @ 2022-04-15 2:12 PM

In puzzle 2 (Crossroads), in the description is "the line passing through this strip" the straight line segment between the two turns (one for each side of the strip), or the whole line between the two adjacent strips?
@ 2022-04-15 2:53 PM (#30533 - in reply to #30522) (#30533) Top

prasanna16391



Posts: 1604
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Country : India

prasanna16391 posted @ 2022-04-15 2:53 PM

The former.
@ 2022-04-15 9:16 PM (#30534 - in reply to #30522) (#30534) Top

Aubin Danzo



Posts: 3

Country : France

Aubin Danzo posted @ 2022-04-15 9:16 PM

I have a question about the 3rd Optimizer (the Football one). It is said that a ball cannot cross a circle of the opposite color. But is it possible for the ball to cross a circle of the same color (like if we consider that this player has already got the ball once)?
@ 2022-04-15 11:32 PM (#30535 - in reply to #30534) (#30535) Top

Riad Khanmagomedov



Posts: 187
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Riad Khanmagomedov posted @ 2022-04-15 11:32 PM

Aubin Danzo - 2022-04-15 9:16 PM

I have a question about the 3rd Optimizer (the Football one). It is said that a ball cannot cross a circle of the opposite color. But is it possible for the ball to cross a circle of the same color (like if we consider that this player has already got the ball once)?

No, in this case, the ball is re-addressed to the player who cannot be used.
@ 2022-04-16 3:41 AM (#30536 - in reply to #30522) (#30536) Top

CJK



Posts: 10

Country : Germany

CJK posted @ 2022-04-16 3:41 AM

For Record Score, does the goal shot also count as part of the path? Especially, if one team has a player next to the opposite goalkeeper, can the same order of players count twice (since this player can kick the ball directly or diagonally into the goal) or is this counted as the same path?
@ 2022-04-16 10:24 AM (#30537 - in reply to #30522) (#30537) Top

kiwijam



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Country : New Zealand

kiwijam posted @ 2022-04-16 10:24 AM

I have some clarifications for the optimizers. Please correct me if I'm wrong.

10. Opti-Road:
There is an error with the example. The column digits should be 22212, not 21212.
Also there is an error with the example answer key: the score for the example is 8, not 9.

11. From 0 to 9:
Without parentheses, we will always do multiplication and division (x and /) before addition and subtraction (_PLUS_ and -). Also, dividing by 0 is not allowed.

12. Record Score:
Total score is number of white paths plus number of black paths. The example is simple so I attach another one.
In this, White has 1 path, 1235674 (this is from the previous question from Christian - I think it is not important which direction #4 scores?).
And Black has 2x2=4 paths, 1234567, 1234576, 1324567, 1324576. It is not possible to go from #4 to #6 directly.
And so the total score for this example is 5.




(Record Score Example.png)



Attachments
----------------
Attachments Record Score Example.png (84KB - 2 downloads)
@ 2022-04-16 12:05 PM (#30538 - in reply to #30529) (#30538) Top

moeve



Posts: 2

Country : Germany

moeve posted @ 2022-04-16 12:05 PM

What about CJK's question:
CJK - 2022-04-14 10:07 PM
Is it allowed to use programs or similar things, especially for the optimization puzzles?

Of course, programming is usually not allowed in puzzle contests -- but ususally there are no optimization puzzles and especially for No. 11 it is obviously quite tempting to do some... ;)
@ 2022-04-16 1:25 PM (#30539 - in reply to #30536) (#30539) Top

Riad Khanmagomedov



Posts: 187
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Riad Khanmagomedov posted @ 2022-04-16 1:25 PM

CJK - 2022-04-16 3:41 AM

For Record Score, does the goal shot also count as part of the path? Especially, if one team has a player next to the opposite goalkeeper, can the same order of players count twice (since this player can kick the ball directly or diagonally into the goal) or is this counted as the same path?

This counts as the same path.
@ 2022-04-16 1:39 PM (#30540 - in reply to #30537) (#30540) Top

Riad Khanmagomedov



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Country : Russia

Riad Khanmagomedov posted @ 2022-04-16 1:39 PM

kiwijam - 2022-04-16 10:24 AM

I have some clarifications for the optimizers. Please correct me if I'm wrong.

10. Opti-Road:
There is an error with the example. The column digits should be 22212, not 21212.
Also there is an error with the example answer key: the score for the example is 8, not 9.

11. From 0 to 9:
Without parentheses, we will always do multiplication and division (x and /) before addition and subtraction (_PLUS_ and -). Also, dividing by 0 is not allowed.

12. Record Score:
Total score is number of white paths plus number of black paths. The example is simple so I attach another one.
In this, White has 1 path, 1235674 (this is from the previous question from Christian - I think it is not important which direction #4 scores?).
And Black has 2x2=4 paths, 1234567, 1234576, 1324567, 1324576. It is not possible to go from #4 to #6 directly.
And so the total score for this example is 5.

Thanks James:
10. You're right, I'll correct the example and the meaning of the expression in the answer format.
11. Yes.
12. Yes.
@ 2022-04-16 9:50 PM (#30541 - in reply to #30522) (#30541) Top

Christian



Posts: 4

Country : France

Christian posted @ 2022-04-16 9:50 PM

Hello,

For optimizer 11, is 2_PLUS_3=5 an equality, or must there be an arithmetic sign on both sides of the equality sign = ?
@ 2022-04-16 10:26 PM (#30542 - in reply to #30540) (#30542) Top

prasanna16391



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Country : India

prasanna16391 posted @ 2022-04-16 10:26 PM

I've uploaded a new PB with these changes.
@ 2022-04-17 12:20 AM (#30544 - in reply to #30541) (#30544) Top

Riad Khanmagomedov



Posts: 187
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Riad Khanmagomedov posted @ 2022-04-17 12:20 AM

Christian - 2022-04-16 9:50 PM

Hello,

For optimizer 11, is 2_PLUS_3=5 an equality, or must there be an arithmetic sign on both sides of the equality sign = ?

Hello Christian,
2_PLUS_3=5 is accepted as an answer.
@ 2022-04-17 3:32 PM (#30545 - in reply to #30522) (#30545) Top

forcolin




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forcolin posted @ 2022-04-17 3:32 PM

For Mechanical Sudoku: Can any of the fragments overlap with one of the existing givens?
For LMI road: can two shaded cells (or half cells (share a side?
stefano
@ 2022-04-17 6:30 PM (#30546 - in reply to #30545) (#30546) Top

Riad Khanmagomedov



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Country : Russia

Riad Khanmagomedov posted @ 2022-04-17 6:30 PM

forcolin - 2022-04-17 3:32 PM

For Mechanical Sudoku: Can any of the fragments overlap with one of the existing givens?
For LMI road: can two shaded cells (or half cells (share a side?
stefano

Hi Stefano,
1. It is not forbidden, but the fragments do not overlap each other.
2. Yes.
@ 2022-04-19 12:02 AM (#30547 - in reply to #30545) (#30547) Top

Barbitos



Posts: 1

Country : FRANCE

Barbitos posted @ 2022-04-19 12:02 AM

Hi, what about -2*-4=8? it would give more points but i guess it could also be forbidden since in that case the "-" sign is not really used as an operator
@ 2022-04-19 11:55 AM (#30549 - in reply to #30529) (#30549) Top

Carlos



Posts: 5

Country : France

Carlos posted @ 2022-04-19 11:55 AM

Hello,
If I am not mistaken, CJK's question doesn't have an answer yet. It would be convenient to know if we have to work only with paper/pencil for the optimization problems or not, in order to be rated with the same criteria.
Thank you very much!
Riad Khanmagomedov's April Contest — 15th to 22nd April 202267 posts • Page 1 of 3 • 1 2 3
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