Riad Khanmagomedov's April Contest — 16th to 23nd April 2023
@ 2023-04-14 10:23 AM (#31435) (#31435) Top

prasanna16391



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prasanna16391 posted @ 2023-04-14 10:23 AM



This annual contest shall take place from 16-23 April 2023.
More details shall be shared in subsequent posts soon.
@ 2023-04-14 10:41 AM (#31437 - in reply to #31435) (#31437) Top

prasanna16391



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prasanna16391 posted @ 2023-04-14 10:41 AM

Contest page

The Puzzle Booklet shall be available just before the start of the contest at the Contest page: https://logicmastersindia.com/live/?contest=M202304Contest
@ 2023-04-14 10:43 AM (#31438 - in reply to #31435) (#31438) Top

prasanna16391



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prasanna16391 posted @ 2023-04-14 10:43 AM

Some notes about April Contest 2023

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.
@ 2023-04-16 10:34 AM (#31452 - in reply to #31435) (#31452) Top

vjain9



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vjain9 posted @ 2023-04-16 10:34 AM

Puzzle booklet yet to be uploaded ? Timer has started though !
@ 2023-04-16 11:53 AM (#31453 - in reply to #31435) (#31453) Top

auroux



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auroux posted @ 2023-04-16 11:53 AM

Now that the contest has started, is the puzzle booklet coming soon?
@ 2023-04-16 12:15 PM (#31454 - in reply to #31435) (#31454) Top

Puzlifouk



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Puzlifouk posted @ 2023-04-16 12:15 PM

Hi everybody,
What is going on with this contest? It seems open, but without a puzzle booklet, it is effectively closed. And the messages in the discussion thread are not readable, even when you are logged in. Can we have some information?
@ 2023-04-16 2:18 PM (#31455 - in reply to #31435) (#31455) Top

puzzler05



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puzzler05 posted @ 2023-04-16 2:18 PM

still+no+booklet....
@ 2023-04-16 3:42 PM (#31456 - in reply to #31435) (#31456) Top

prasanna16391



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prasanna16391 posted @ 2023-04-16 3:42 PM

Note: Sorry about the puzzle booklet. I missed a command that shows it. Its up now. I'll extend the contest end by a day to compensate.
@ 2023-04-16 5:32 PM (#31457 - in reply to #31435) (#31457) Top

Puzlifouk



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Puzlifouk posted @ 2023-04-16 5:32 PM

Hello again. For puzzle 9 (Open road): Do you confirm not all double cells must have a one-half shaded?
@ 2023-04-16 6:36 PM (#31458 - in reply to #31435) (#31458) Top

auroux



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auroux posted @ 2023-04-16 6:36 PM

For+puzzle+2%2c+the+answer+key+of+the+example+seems+wrong+(should+be+WWWIW).
@ 2023-04-16 11:13 PM (#31459 - in reply to #31435) (#31459) Top

Administrator



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Administrator posted @ 2023-04-16 11:13 PM

I confirm the other way: all double cells must have one half shaded and the other used.
@ 2023-04-16 11:16 PM (#31460 - in reply to #31435) (#31460) Top

Administrator



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Administrator posted @ 2023-04-16 11:16 PM

Auroux: You are right. The answer key for example 2 is wrong and there should be an I instead of an L.
@ 2023-04-16 11:48 PM (#31461 - in reply to #31459) (#31461) Top

Puzlifouk



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Puzlifouk posted @ 2023-04-16 11:48 PM

OK! So that means half shaded cell may touch a shaded cell, at least diagonally!
In fact, my initial problem was that I inderstood ths conditions as :
- all double cells must have a shaded half and an unshaded half;
- all shaded cells and all shaded half of double cells do not touch.
But these two conditions cannot both be verified. If they were, this creates problem around the magenta and the lemon M.
So I have a new question: if a shaded half of a double celle can touch a shaded cell (or another shaded half of a double cell), is it necessarily diagonally, or can it also be orthogonally? Am I clear?
@ 2023-04-17 12:43 AM (#31462 - in reply to #31435) (#31462) Top

Administrator



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Administrator posted @ 2023-04-17 12:43 AM

Shaded cells cannot touch orthogonally. They can touch diagonally. (This is for puzzle 9)
@ 2023-04-17 1:16 AM (#31463 - in reply to #31462) (#31463) Top

Puzlifouk



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Puzlifouk posted @ 2023-04-17 1:16 AM

Administrator - 2023-04-16 7:43 PM

Shaded cells cannot touch orthogonally. They can touch diagonally. (This is for puzzle 9)

OK Thanks. The puzzle booklet says something else ("The shaded cells do not touch, not even diagonally"). It will be corrected, I suppose ...
@ 2023-04-17 2:21 AM (#31464 - in reply to #31435) (#31464) Top

Administrator



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Administrator posted @ 2023-04-17 2:21 AM

Yes we will get it corrected soon.
@ 2023-04-17 11:32 AM (#31468 - in reply to #31435) (#31468) Top

Administrator



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Administrator posted @ 2023-04-17 11:32 AM


Potential Score Page

Link to Potential Score Page : https://logicmastersindia.com/2023/04Contest/score_potential.asp

@ 2023-04-17 11:50 AM (#31469 - in reply to #31435) (#31469) Top

Puzlifouk



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Puzlifouk posted @ 2023-04-17 11:50 AM

Hello. New question about problem 10. What is the order of priority of the operations? Are the operations performed in the order they are found or do multiplication (X) and division (/) have priority? In other words, do we have 9-6/3=(9-6)/3=1 or 9-6/3=9-(6/3)=7?
@ 2023-04-17 2:36 PM (#31470 - in reply to #31435) (#31470) Top

prasanna16391



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prasanna16391 posted @ 2023-04-17 2:36 PM

The rules say "without parenthesis" which means they are performed in the order they are found.
@ 2023-04-17 6:11 PM (#31472 - in reply to #31438) (#31472) Top

Barbitos



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Barbitos posted @ 2023-04-17 6:11 PM

%5BQUOTE%5D8%2E+There+shall+be+no+online+solving+interface+%28like+penpa%29+provided+for+this+test%2E%5B%2FQUOTE%5D%0D%0A%0D%0AAre+we+still+allowed+to+use+penpa+to+copy+the+puzzles+and+solve+them+if+we%27re+more+confortable+with+it%3F%0D%0A%0D%0AAlso%2C+to+what+extent+are+we+allowed+to+use+calculators+and+other+programs%3F+I%27m+guessing+the+line+is+drawn+at+something+like+%22only+what+you+could+do+on+windows%27+calculator+app%22+or+%22no+calculators+allowed+period%22%0D%0A%0D%0AI+couldn%27t+find+any+clear+ruleset+for+this+contest%2C+if+there+are+i+would+like+to+know+where+it+is+%F0%9F%98%8A
@ 2023-04-17 6:19 PM (#31473 - in reply to #31469) (#31473) Top

Riad Khanmagomedov



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Riad Khanmagomedov posted @ 2023-04-17 6:19 PM

Puzlifouk - 2023-04-17 11:50 AM

Hello. New question about problem 10. What is the order of priority of the operations? Are the operations performed in the order they are found or do multiplication (X) and division (/) have priority? In other words, do we have 9-6/3=(9-6)/3=1 or 9-6/3=9-(6/3)=7?

9-6/3=7. The priority of operations is standard.
@ 2023-04-17 8:22 PM (#31474 - in reply to #31470) (#31474) Top

prasanna16391



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prasanna16391 posted @ 2023-04-17 8:22 PM

prasanna16391 - 2023-04-17 2:36 PM

The rules say "without parenthesis" which means they are performed in the order they are found.


Sorry, guess I was a bit wrong here, please follow what Riad says.
@ 2023-04-17 8:24 PM (#31475 - in reply to #31472) (#31475) Top

prasanna16391



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prasanna16391 posted @ 2023-04-17 8:24 PM

%5BQUOTE%5DBarbitos+%2D+2023%2D04%2D17++6%3A11+PM%0D%0A%0D%0AAre+we+still+allowed+to+use+penpa+to+copy+the+puzzles+and+solve+them+if+we%27re+more+confortable+with+it%3F%0D%0A%0D%0AAlso%2C+to+what+extent+are+we+allowed+to+use+calculators+and+other+programs%3F+I%27m+guessing+the+line+is+drawn+at+something+like+%22only+what+you+could+do+on+windows%27+calculator+app%22+or+%22no+calculators+allowed+period%22%0D%0A%0D%0AI+couldn%27t+find+any+clear+ruleset+for+this+contest%2C+if+there+are+i+would+like+to+know+where+it+is+%F0%9F%98%8A%5B%2FQUOTE%5D%0D%0A%0D%0ARedrawing+on+Penpa+is+fine%2E+There+is+no+rule+against+using+calculators+and+other+programs%2C+but+the+contest+was+intended+to+be+done+without+them%2E+I+suppose+your+line+is+a+good+line+to+draw%2E+
@ 2023-04-17 8:54 PM (#31477 - in reply to #31435) (#31477) Top

auroux



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auroux posted @ 2023-04-17 8:54 PM

On puzzle 10, does a circular equality loop "all around" with equal signs separating equal terms (in particular there must be at least two = signs), or do we get to "break the circle" where we want (not necessarily at an equality sign, and not necessarily in the same place in both directions) to form equalities that can be read clockwise or counterclockwise?

Concretely, if for some digits A,B,C,D,E one had the identities A_PLUS_BC=DEF and ED=CB_PLUS_AF, where the latter can be formed by writing the former around a circle, cutting in a different place, and reading in the other direction, would this be a valid solution ? Or is the only legal way to write the identity A_PLUS_BC=DEF to actually write "A_PLUS_BC=DEF=" around the circle (with an extra equal sign) and both expressions must be formed by cutting the circle at an "=" sign ?
@ 2023-04-17 8:59 PM (#31478 - in reply to #31435) (#31478) Top

auroux



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auroux posted @ 2023-04-17 8:59 PM

After more thinking, I assume the correct interpretation is that we can break the circle anywhere we want (not necessarily at an = sign, and not necessarily in the same place in both directions), and that the example I gave would be a valid solution. Otherwise, it would have been easier to state the problem as producing an equality which is valid when read forwards and backwards (no need to use a circle).
@ 2023-04-17 9:26 PM (#31479 - in reply to #31435) (#31479) Top

jeff10



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jeff10 posted @ 2023-04-17 9:26 PM

For the Bubbles Puzzle (Puzzle 2), do bubbles have to circle completely around an NxN (N=1,2,3) square of cells, or can a bubble of "size 3" only circle 3 of the leftmost cells while the center of the bubble is outside the grid?
@ 2023-04-18 12:06 AM (#31480 - in reply to #31477) (#31480) Top

Riad Khanmagomedov



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Riad Khanmagomedov posted @ 2023-04-18 12:06 AM

auroux - 2023-04-17 8:54 PM

On puzzle 10, does a circular equality loop "all around" with equal signs separating equal terms (in particular there must be at least two = signs), or do we get to "break the circle" where we want (not necessarily at an equality sign, and not necessarily in the same place in both directions) to form equalities that can be read clockwise or counterclockwise?

Concretely, if for some digits A,B,C,D,E one had the identities A_PLUS_BC=DEF and ED=CB_PLUS_AF, where the latter can be formed by writing the former around a circle, cutting in a different place, and reading in the other direction, would this be a valid solution ? Or is the only legal way to write the identity A_PLUS_BC=DEF to actually write "A_PLUS_BC=DEF=" around the circle (with an extra equal sign) and both expressions must be formed by cutting the circle at an "=" sign ?

You can't break the expression wherever you want. If you write down your expressions many times in a row (or read in a circle an infinite number of times), then you should get the right equality. In the example , you can write 68=45_PLUS_23=68=45_PLUS_23=68= etc.
@ 2023-04-18 12:14 AM (#31481 - in reply to #31478) (#31481) Top

Riad Khanmagomedov



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Riad Khanmagomedov posted @ 2023-04-18 12:14 AM

auroux - 2023-04-17 8:59 PM

After more thinking, I assume the correct interpretation is that we can break the circle anywhere we want (not necessarily at an = sign, and not necessarily in the same place in both directions), and that the example I gave would be a valid solution. Otherwise, it would have been easier to state the problem as producing an equality which is valid when read forwards and backwards (no need to use a circle).

The circle is used in the construction of letter palindromes, which are read an infinite number of times clockwise and counterclockwise, but sometimes giving different phrases. In Russia, such constructions are called cyclodromes.
@ 2023-04-18 12:21 AM (#31482 - in reply to #31480) (#31482) Top

auroux



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auroux posted @ 2023-04-18 12:21 AM

Riad Khanmagomedov - 2023-04-17 11:06 AMYou can't break the expression wherever you want. If you write down your expressions many times in a row (or read in a circle an infinite number of times), then you should get the right equality. In the example , you can write 68=45_PLUS_23=68=45_PLUS_23=68= etc.

Ok, thanks. But, uh, wait. Now I am concerned. Is there, then, a requirement to have at least two equal signs?
Otherwise, something like '98765*43210=' around the circle produces a valid equality when reading around the circle infinitely many times: 98765*43210=98765*43210=98765*43210=...
But this seems to violate the spirit of the puzzle, or at least there isn't much optimization left to do in this version.

And for completeness, can you clarify what exactly you expect in the answer key? The example given for the answer format only has one = sign given for each direction, even though there are two reading around the circle, so do we answer by giving what you get by cutting the circle open at an '=' sign and reading everything from just after that '=' sign to just before it, but not including the '=' sign along which we cut?

Sorry to be picky about details, but I think people spending time on this puzzle want to make sure that they are working on the correct version of it...


Thanks,Denis
@ 2023-04-18 2:57 AM (#31483 - in reply to #31479) (#31483) Top

prasanna16391



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prasanna16391 posted @ 2023-04-18 2:57 AM

jeff10 - 2023-04-17 9:26 PM

For the Bubbles Puzzle (Puzzle 2), do bubbles have to circle completely around an NxN (N=1,2,3) square of cells, or can a bubble of "size 3" only circle 3 of the leftmost cells while the center of the bubble is outside the grid?


The former.
@ 2023-04-18 2:59 AM (#31484 - in reply to #31435) (#31484) Top

prasanna16391



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prasanna16391 posted @ 2023-04-18 2:59 AM

A new puzzle booklet has been uploaded to address some of the issues discussed in the previous page (puzzle 9 wording and puzzle 2 example's key)
@ 2023-04-18 11:26 AM (#31488 - in reply to #31482) (#31488) Top

Riad Khanmagomedov



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Riad Khanmagomedov posted @ 2023-04-18 11:26 AM

auroux - 2023-04-18 12:21 AM

Riad Khanmagomedov - 2023-04-17 11:06 AMYou can't break the expression wherever you want. If you write down your expressions many times in a row (or read in a circle an infinite number of times), then you should get the right equality. In the example , you can write 68=45_PLUS_23=68=45_PLUS_23=68= etc.

Ok, thanks. But, uh, wait. Now I am concerned. Is there, then, a requirement to have at least two equal signs?
Otherwise, something like '98765*43210=' around the circle produces a valid equality when reading around the circle infinitely many times: 98765*43210=98765*43210=98765*43210=...
But this seems to violate the spirit of the puzzle, or at least there isn't much optimization left to do in this version.

And for completeness, can you clarify what exactly you expect in the answer key? The example given for the answer format only has one = sign given for each direction, even though there are two reading around the circle, so do we answer by giving what you get by cutting the circle open at an '=' sign and reading everything from just after that '=' sign to just before it, but not including the '=' sign along which we cut?

Sorry to be picky about details, but I think people spending time on this puzzle want to make sure that they are working on the correct version of it...


Thanks,Denis

You must have 2, 3 or more equal signs. You can also get the equality 1 = 3-2 = 5-4 = with three equal signs and write it out endlessly in a circle. But at the same time, in the opposite direction, it must also be true.
@ 2023-04-18 11:40 AM (#31489 - in reply to #31435) (#31489) Top

auroux



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auroux posted @ 2023-04-18 11:40 AM

Ok thank you! Now it is clear.
@ 2023-04-18 2:31 PM (#31493 - in reply to #31489) (#31493) Top

Riad Khanmagomedov



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Riad Khanmagomedov posted @ 2023-04-18 2:31 PM

auroux - 2023-04-18 11:40 AM

Ok thank you! Now it is clear.

It is allowed to use arithmetic signs on both sides of the equal sign.
@ 2023-04-18 5:01 PM (#31494 - in reply to #31435) (#31494) Top

Leonardo024




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Leonardo024 posted @ 2023-04-18 5:01 PM

For puzzle 5 (Navigation), the instruction says to form 8 connected areas along the grid lines, however only 6 letters are given. Does this imply that the other two regions do not occur in the 2 columns of the answer format (column 4 and 9)? Since the answer page also asks for digits and/or letters A-F (rather than A-H for 8 areas instead of 6).
@ 2023-04-18 10:43 PM (#31495 - in reply to #31435) (#31495) Top

Administrator



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Administrator posted @ 2023-04-18 10:43 PM

If you try the puzzle your question will be answered.
@ 2023-04-19 3:20 PM (#31497 - in reply to #31435) (#31497) Top

Nikola



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Nikola posted @ 2023-04-19 3:20 PM

Puzzle 10

Can we create equality without directly expressed result? For the example, is 32_PLUS_54=86_PLUS_0= allowed? Maybe this is a bad example because of zero but I hope you understand the question.
@ 2023-04-19 3:55 PM (#31498 - in reply to #31435) (#31498) Top

auroux



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auroux posted @ 2023-04-19 3:55 PM

Nikola: I think the answer is yes, and this is exactly what Riad meant when he wrote to me that "It is allowed to use arithmetic signs on both sides of the equal sign." What I am not sure about, though, is whether the answer key should include the final "=" (even though it is there when writing around the circle) - my current understanding based on the PB example is that the circular identity "32_PLUS_54=86_PLUS_0=..." is entered as "32_PLUS_54=86_PLUS_0" for the answer key.

Edited by auroux 2023-04-19 3:57 PM
@ 2023-04-19 4:27 PM (#31499 - in reply to #31435) (#31499) Top

Nikola



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Nikola posted @ 2023-04-19 4:27 PM

Okay, but in his example he still got a result 1 (in one direction). Another example: 9x2=6x3= ... I don't want to put =18 because it would give 81 in the opposite direction. Maybe confirmation would be useful.

Edited by Nikola 2023-04-19 4:35 PM
@ 2023-04-19 4:47 PM (#31502 - in reply to #31435) (#31502) Top

L00ping007



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L00ping007 posted @ 2023-04-19 4:47 PM

In puzzle 10, there is a digit missing in the "Answer key" sentence
"68=45_PLUS_23, 32_PLUS_54=8" should be ", 68=45_PLUS_23, 32_PLUS_54=86" ;-)
@ 2023-04-19 6:36 PM (#31504 - in reply to #31497) (#31504) Top

Riad Khanmagomedov



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Riad Khanmagomedov posted @ 2023-04-19 6:36 PM

Nikola - 2023-04-19 3:20 PM

Puzzle 10

Can we create equality without directly expressed result? For the example, is 32_PLUS_54=86_PLUS_0= allowed? Maybe this is a bad example because of zero but I hope you understand the question.

Yes
@ 2023-04-19 6:40 PM (#31505 - in reply to #31498) (#31505) Top

Riad Khanmagomedov



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Riad Khanmagomedov posted @ 2023-04-19 6:40 PM

auroux - 2023-04-19 3:55 PM

Nikola: I think the answer is yes, and this is exactly what Riad meant when he wrote to me that "It is allowed to use arithmetic signs on both sides of the equal sign." What I am not sure about, though, is whether the answer key should include the final "=" (even though it is there when writing around the circle) - my current understanding based on the PB example is that the circular identity "32_PLUS_54=86_PLUS_0=..." is entered as "32_PLUS_54=86_PLUS_0" for the answer key.

In this case, write the answer as follows: 32_PLUS_54=86_PLUS_0 and 0_PLUS_68= 45_PLUS_23.
@ 2023-04-19 6:44 PM (#31506 - in reply to #31499) (#31506) Top

Riad Khanmagomedov



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Riad Khanmagomedov posted @ 2023-04-19 6:44 PM

Nikola - 2023-04-19 4:27 PM

Okay, but in his example he still got a result 1 (in one direction). Another example: 9x2=6x3= ... I don't want to put =18 because it would give 81 in the opposite direction. Maybe confirmation would be useful.

I gave an example with 1 to demonstrate three equal signs. This example is more successful: 7-6=5-4=3-2=7-6=5-4=3-2= etc.
@ 2023-04-19 6:47 PM (#31507 - in reply to #31502) (#31507) Top

Riad Khanmagomedov



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Riad Khanmagomedov posted @ 2023-04-19 6:47 PM

L00ping007 - 2023-04-19 4:47 PM

In puzzle 10, there is a digit missing in the "Answer key" sentence
"68=45_PLUS_23, 32_PLUS_54=8" should be ", 68=45_PLUS_23, 32_PLUS_54=86" ;-)

I'll correct it, thank you!
@ 2023-04-19 10:22 PM (#31509 - in reply to #31435) (#31509) Top

Barbitos



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Barbitos posted @ 2023-04-19 10:22 PM

On Puzzle 11; does the minesweeper part in itself have to be unique or can it have multiple solutions but only one mine-loops pairing?
@ 2023-04-19 11:39 PM (#31510 - in reply to #31509) (#31510) Top

Riad Khanmagomedov



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Riad Khanmagomedov posted @ 2023-04-19 11:39 PM

Barbitos - 2023-04-19 10:22 PM

On Puzzle 11; does the minesweeper part in itself have to be unique or can it have multiple solutions but only one mine-loops pairing?

Quote from the text: "Create a Minesweeper puzzle with a unique solution".
@ 2023-04-19 11:47 PM (#31511 - in reply to #31510) (#31511) Top

Barbitos



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Barbitos posted @ 2023-04-19 11:47 PM

thanks :) i figured that was probably the case but wanted to make sure

also thanks for hosting this contest, i'm having a blast solving those devilish puzzles
@ 2023-04-20 12:54 AM (#31512 - in reply to #31510) (#31512) Top

auroux



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auroux posted @ 2023-04-20 12:54 AM

Riad Khanmagomedov - 2023-04-19 10:39 AM
Barbitos - 2023-04-19 10:22 PMOn Puzzle 11; does the minesweeper part in itself have to be unique or can it have multiple solutions but only one mine-loops pairing?
Quote from the text: "Create a Minesweeper puzzle with a unique solution".
Oh, that's so disappointing. It would have been more elegant to have to create a puzzle whose solution is unique when one takes into account the requirement that there should exist a loop (but which may have multiple solutions as a pure minesweeper puzzle) -- so much so that I assumed that it was actually the task. Oh well, I shall redo it to make something that is also unique as a minesweeper puzzle. I was so happy with my submission, but it's definitely not unique at all as a minesweeper.
@ 2023-04-20 10:57 AM (#31516 - in reply to #31435) (#31516) Top

pinkagape



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pinkagape posted @ 2023-04-20 10:57 AM

In Puzzle 6, I'm a bit confused by the "vice versa" in the instructions for Turns. Is it saying that if the loop doesn't turn and enters a cell without a circle, then it must turn in the next cell (so you can't have more than one straight in a row)?
@ 2023-04-20 11:35 AM (#31518 - in reply to #31512) (#31518) Top

Riad Khanmagomedov



Posts: 235
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Country : Russia

Riad Khanmagomedov posted @ 2023-04-20 11:35 AM

auroux - 2023-04-20 12:54 AM

Riad Khanmagomedov - 2023-04-19 10:39 AM
Barbitos - 2023-04-19 10:22 PMOn Puzzle 11; does the minesweeper part in itself have to be unique or can it have multiple solutions but only one mine-loops pairing?
Quote from the text: "Create a Minesweeper puzzle with a unique solution".
Oh, that's so disappointing. It would have been more elegant to have to create a puzzle whose solution is unique when one takes into account the requirement that there should exist a loop (but which may have multiple solutions as a pure minesweeper puzzle) -- so much so that I assumed that it was actually the task. Oh well, I shall redo it to make something that is also unique as a minesweeper puzzle. I was so happy with my submission, but it's definitely not unique at all as a minesweeper.

Denis, I will check the uniqueness of the Minesweeper puzzle, and then watch a loop.
@ 2023-04-20 11:40 AM (#31519 - in reply to #31516) (#31519) Top

Riad Khanmagomedov



Posts: 235
10010020
Country : Russia

Riad Khanmagomedov posted @ 2023-04-20 11:40 AM

pinkagape - 2023-04-20 10:57 AM

In Puzzle 6, I'm a bit confused by the "vice versa" in the instructions for Turns. Is it saying that if the loop doesn't turn and enters a cell without a circle, then it must turn in the next cell (so you can't have more than one straight in a row)?

In this part of the grid, the line behaves like in the puzzle "Every second turn". If there was a turn in a circle, then the next turn will be in a cell without a circle, then again in a circle, etc.
@ 2023-04-20 5:18 PM (#31523 - in reply to #31435) (#31523) Top

L00ping007



Posts: 11

Country : France

L00ping007 posted @ 2023-04-20 5:18 PM

Puzzle 6
"It is also possible for the line to make a turn and leave the grid, in this case it can turn in the next grid before meeting a circle."

Is there a vice versa too ? When the last turn before leaving the grid is a circle ?

Isn't it more accurate to say :
"It is also possible for the line to make a turn and leave the grid, in this case :
- if the last turn in the grid isn't a circle, it can turn in the next grid before meeting a circle.
- if the last turn in the grid is a circle, it can turn in the next grid at a circle"
?
@ 2023-04-20 11:41 PM (#31527 - in reply to #31435) (#31527) Top

prasanna16391



Posts: 1806
1000500100100100
Country : India

prasanna16391 posted @ 2023-04-20 11:41 PM

A new puzzle booklet has been uploaded with changes to the text in Puzzle 10's rules, to reflect the discussions here.
@ 2023-04-20 11:42 PM (#31528 - in reply to #31523) (#31528) Top

prasanna16391



Posts: 1806
1000500100100100
Country : India

prasanna16391 posted @ 2023-04-20 11:42 PM

L00ping007 - 2023-04-20 5:18 PM

Puzzle 6
"It is also possible for the line to make a turn and leave the grid, in this case it can turn in the next grid before meeting a circle."

Is there a vice versa too ? When the last turn before leaving the grid is a circle ?

Isn't it more accurate to say :
"It is also possible for the line to make a turn and leave the grid, in this case :
- if the last turn in the grid isn't a circle, it can turn in the next grid before meeting a circle.
- if the last turn in the grid is a circle, it can turn in the next grid at a circle"
?


Yes, this is what is intended to be conveyed.
@ 2023-04-21 12:02 AM (#31529 - in reply to #31435) (#31529) Top

EoHeongMat



Posts: 7

Country : South Korea

EoHeongMat posted @ 2023-04-21 12:02 AM

Puzzle 12

Must all words be connected?
@ 2023-04-21 12:35 PM (#31531 - in reply to #31529) (#31531) Top

Riad Khanmagomedov



Posts: 235
10010020
Country : Russia

Riad Khanmagomedov posted @ 2023-04-21 12:35 PM

EoHeongMat - 2023-04-21 12:02 AM

Puzzle 12

Must all words be connected?

Yes, of course.
@ 2023-04-21 3:39 PM (#31532 - in reply to #31531) (#31532) Top

auroux



Posts: 145
1002020
Country : France

auroux posted @ 2023-04-21 3:39 PM

Riad Khanmagomedov - 2023-04-20 11:35 PM
EoHeongMat - 2023-04-21 12:02 AMPuzzle 12Must all words be connected?
Yes, of course.
Well, that's not what the PB says. "Each name should intersect with at least one other" is not the same thing, and would be redundant if all words were connected.Another 12 hours of time wasted on solving one of these with the wrong set of instructions, and this time I don't think it was entirely my fault...(Sorry for being negative. But it is extremely frustrating.)
@ 2023-04-21 4:29 PM (#31533 - in reply to #31532) (#31533) Top

Riad Khanmagomedov



Posts: 235
10010020
Country : Russia

Riad Khanmagomedov posted @ 2023-04-21 4:29 PM

auroux - 2023-04-21 3:39 PM

Riad Khanmagomedov - 2023-04-20 11:35 PM
EoHeongMat - 2023-04-21 12:02 AMPuzzle 12Must all words be connected?
Yes, of course.
Well, that's not what the PB says. "Each name should intersect with at least one other" is not the same thing, and would be redundant if all words were connected.Another 12 hours of time wasted on solving one of these with the wrong set of instructions, and this time I don't think it was entirely my fault...(Sorry for being negative. But it is extremely frustrating.)

PB says make a crossword. One, not several crosswords. If the words are not related to each other, then you will get several crosswords.
@ 2023-04-21 7:15 PM (#31534 - in reply to #31435) (#31534) Top

-..ferchx..-



Posts: 2

Country : Spain

-..ferchx..- posted @ 2023-04-21 7:15 PM

Congratulations Riyadh. Hours of fun await me at your expense.
@ 2023-04-21 10:36 PM (#31535 - in reply to #31534) (#31535) Top

-..ferchx..-



Posts: 2

Country : Spain

-..ferchx..- posted @ 2023-04-21 10:36 PM

-..ferchx..- - 2023-04-21 7:15 PM

Congratulations Riad. Hours of fun thanks to you.
@ 2023-04-22 2:47 AM (#31536 - in reply to #31435) (#31536) Top

pinkagape



Posts: 15

Country : United Kingdom

pinkagape posted @ 2023-04-22 2:47 AM

Can+someone+clarify+the+cut+off+time+for+this+contest+please%3F+It+would+be+easier+if+it+was+23%3A59+or+00%3A01+because+then+we%E2%80%99d+know+which+day+we+were+talking+about%2E
@ 2023-04-22 3:29 AM (#31537 - in reply to #31435) (#31537) Top

Administrator



20001000500202020
Country : India

Administrator posted @ 2023-04-22 3:29 AM

Consider it as 23:59 on 24th.
@ 2023-04-22 6:56 AM (#31539 - in reply to #31435) (#31539) Top

L00ping007



Posts: 11

Country : France

L00ping007 posted @ 2023-04-22 6:56 AM

Puzzle 11
"Create a Minesweeper puzzle with a unique solution in the 9x9grid"
Do we agree that the instructions to solve a Minesweeper include a given number of mines to find ? As in Puzzle 6 for exemple
A grid could have multiple solutions without that number of mines, but when it is given as an instruction, the solution can become unique
The grid I submitted needs that number to have a unique solution


@ 2023-04-22 1:59 PM (#31540 - in reply to #31539) (#31540) Top

Riad Khanmagomedov



Posts: 235
10010020
Country : Russia

Riad Khanmagomedov posted @ 2023-04-22 1:59 PM

L00ping007 - 2023-04-22 6:56 AM

Puzzle 11
"Create a Minesweeper puzzle with a unique solution in the 9x9grid"
Do we agree that the instructions to solve a Minesweeper include a given number of mines to find ? As in Puzzle 6 for exemple
A grid could have multiple solutions without that number of mines, but when it is given as an instruction, the solution can become unique
The grid I submitted needs that number to have a unique solution



Create a classic Minesweeper puzzle in which the number of mines is not given.
@ 2023-04-22 3:22 PM (#31541 - in reply to #31435) (#31541) Top

dissertationhelpinuk




Posts: 1

Country : United Kingdom

dissertationhelpinuk posted @ 2023-04-22 3:22 PM

Created a Minesweeper puzzle with a unique solution in the 9x9grid
@ 2023-04-22 4:36 PM (#31542 - in reply to #31435) (#31542) Top

krasnosulinec1797



Posts: 2

Country : Russia

krasnosulinec1797 posted @ 2023-04-22 4:36 PM

%D0%97%D0%B4%D1%80%D0%B0%D0%B2%D1%81%D1%82%D0%B2%D1%83%D0%B9%2C%D0%A0%D0%B8%D0%B0%D0%B4%21%0D%0A%D0%A3+%D0%BC%D0%B5%D0%BD%D1%8F+%D0%B2%D0%BE%D0%BF%D1%80%D0%BE%D1%81+%D0%BF%D0%BE+%D0%B7%D0%B0%D0%B4%D0%B0%D1%87%D0%B5+9%2E%0D%0A%D0%9C%D0%BE%D0%B3%D1%83%D1%82+%D0%BB%D0%B8+%D0%B4%D0%B2%D0%BE%D0%B9%D0%BD%D1%8B%D0%B5+%D1%8F%D1%87%D0%B5%D0%B9%D0%BA%D0%B8+%D0%BE%D1%81%D1%82%D0%B0%D0%B2%D0%B0%D1%82%D1%8C%D1%81%D1%8F+%D0%BF%D0%BE%D0%BB%D0%BD%D0%BE%D1%81%D1%82%D1%8C%D1%8E+%D0%BD%D0%B5+%D0%B7%D0%B0%D0%BA%D1%80%D0%B0%D1%88%D0%B5%D0%BD%D0%BD%D1%8B%D0%BC%D0%B8%3F%0D%0A%D0%94%D0%BC%D0%B8%D1%82%D1%80%D0%B8%D0%B9%2E
@ 2023-04-22 4:48 PM (#31543 - in reply to #31435) (#31543) Top

forcolin




Posts: 172
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Country : ITALY

forcolin posted @ 2023-04-22 4:48 PM

puzzle 12. is it acceptable if two words partially overlap? eg 0L6ARANCE if so how many times will the 6 count?
stefano
@ 2023-04-22 9:38 PM (#31544 - in reply to #31542) (#31544) Top

Riad Khanmagomedov



Posts: 235
10010020
Country : Russia

Riad Khanmagomedov posted @ 2023-04-22 9:38 PM

%5BQUOTE%5Dkrasnosulinec1797+%2D+2023%2D04%2D22++4%3A36+PM%0D%0A%0D%0A%D0%97%D0%B4%D1%80%D0%B0%D0%B2%D1%81%D1%82%D0%B2%D1%83%D0%B9%2C%D0%A0%D0%B8%D0%B0%D0%B4%21%0D%0A%D0%A3+%D0%BC%D0%B5%D0%BD%D1%8F+%D0%B2%D0%BE%D0%BF%D1%80%D0%BE%D1%81+%D0%BF%D0%BE+%D0%B7%D0%B0%D0%B4%D0%B0%D1%87%D0%B5+9%2E%0D%0A%D0%9C%D0%BE%D0%B3%D1%83%D1%82+%D0%BB%D0%B8+%D0%B4%D0%B2%D0%BE%D0%B9%D0%BD%D1%8B%D0%B5+%D1%8F%D1%87%D0%B5%D0%B9%D0%BA%D0%B8+%D0%BE%D1%81%D1%82%D0%B0%D0%B2%D0%B0%D1%82%D1%8C%D1%81%D1%8F+%D0%BF%D0%BE%D0%BB%D0%BD%D0%BE%D1%81%D1%82%D1%8C%D1%8E+%D0%BD%D0%B5+%D0%B7%D0%B0%D0%BA%D1%80%D0%B0%D1%88%D0%B5%D0%BD%D0%BD%D1%8B%D0%BC%D0%B8%3F%0D%0A%D0%94%D0%BC%D0%B8%D1%82%D1%80%D0%B8%D0%B9%2E%5B%2FQUOTE%5D%0D%0A%D0%97%D0%B4%D1%80%D0%B0%D0%B2%D1%81%D1%82%D0%B2%D1%83%D0%B9%2C+%D0%94%D0%B8%D0%BC%D0%B0%21+%0D%0A%D0%9D%D1%83%D0%B6%D0%BD%D0%BE+%D0%B7%D0%B0%D1%82%D0%B5%D0%BC%D0%BD%D0%B8%D1%82%D1%8C+%D0%BF%D0%BE%D0%BB%D0%BE%D0%B2%D0%B8%D0%BD%D0%BA%D0%B8+%D0%B2%D1%81%D0%B5%D1%85+%D1%81%D0%B4%D0%B2%D0%BE%D0%B5%D0%BD%D0%BD%D1%8B%D1%85+%D0%BA%D0%BB%D0%B5%D1%82%D0%BE%D0%BA%2E
@ 2023-04-22 9:41 PM (#31545 - in reply to #31543) (#31545) Top

Riad Khanmagomedov



Posts: 235
10010020
Country : Russia

Riad Khanmagomedov posted @ 2023-04-22 9:41 PM

forcolin - 2023-04-22 4:48 PM

puzzle 12. is it acceptable if two words partially overlap? eg 0L6ARANCE if so how many times will the 6 count?
stefano

Hi Stefano,
This is unacceptable. There must be at least one empty cell between two words.
@ 2023-04-23 10:25 AM (#31546 - in reply to #31435) (#31546) Top

NGC 1535



Posts: 2

Country : China

NGC 1535 posted @ 2023-04-23 10:25 AM

Puzzle 12

Can two vertical words touch but not intersect each other?
@ 2023-04-23 2:16 PM (#31547 - in reply to #31435) (#31547) Top

Eugene



Posts: 4

Country : Russia

Eugene posted @ 2023-04-23 2:16 PM

Puzzle 2

Can we draw circle such that some its squares were outside the grid?
@ 2023-04-23 3:55 PM (#31548 - in reply to #31547) (#31548) Top

Riad Khanmagomedov



Posts: 235
10010020
Country : Russia

Riad Khanmagomedov posted @ 2023-04-23 3:55 PM

Eugene - 2023-04-23 2:16 PM

Puzzle 2

Can we draw circle such that some its squares were outside the grid?

No, the squares should be inside the grid.
@ 2023-04-23 7:36 PM (#31549 - in reply to #31435) (#31549) Top

NGC 1535



Posts: 2

Country : China

NGC 1535 posted @ 2023-04-23 7:36 PM

Puzzle 12
Can two vertical words touch but not intersect each other?
Besides, I hope there are more details about how to create a crossword to make it clearer.
@ 2023-04-23 8:48 PM (#31550 - in reply to #31435) (#31550) Top

Barbitos



Posts: 6

Country : France

Barbitos posted @ 2023-04-23 8:48 PM

When is the contest ending exactly? because if that is anytime later than Midnight IST in the night from the 23th to 24th of april (in 3h20), i won't be able to submit answers after that

If that is the case, do i send an email to logicmasteradmin@gmail.com as if the website was down?
@ 2023-04-24 1:47 AM (#31551 - in reply to #31550) (#31551) Top

Administrator



20001000500202020
Country : India

Administrator posted @ 2023-04-24 1:47 AM

Barbitos - 2023-04-23 8:48 PM

When is the contest ending exactly? because if that is anytime later than Midnight IST in the night from the 23th to 24th of april (in 3h20), i won't be able to submit answers after that

If that is the case, do i send an email to logicmasteradmin@gmail.com as if the website was down?


Ya you can but let us know in the mail why you're unable to submit answers.
@ 2023-04-24 1:56 AM (#31552 - in reply to #31551) (#31552) Top

auroux



Posts: 145
1002020
Country : France

auroux posted @ 2023-04-24 1:56 AM

Administrator - 2023-04-23 12:47 PMYa you can but let us know in the mail why you're unable to submit answers.

The most obvious reason would be that everyone who started this contest before the end time was extended has had a countdown clock that expired a few hours ago and for us the LMI platform says the contest is over. (When the end of the contest was extended, the submission deadlines for those who had already started the contest did not get extended).
(As for myself I don't care because I finished everything I wanted to do, assuming no further surprises about previously unexplained rules that change the nature of any puzzles).-- Denis

Edited by auroux 2023-04-24 1:56 AM
@ 2023-04-24 3:09 AM (#31553 - in reply to #31552) (#31553) Top

prasanna16391



Posts: 1806
1000500100100100
Country : India

prasanna16391 posted @ 2023-04-24 3:09 AM

Oof I genuinely missed that the countdown clock and the end time setting are differently coded for this contest. We will try to reset it but yes we will accept submissions via email for now. Thanks for pointing this out.
@ 2023-04-24 10:14 AM (#31554 - in reply to #31435) (#31554) Top

Administrator



20001000500202020
Country : India

Administrator posted @ 2023-04-24 10:14 AM

The timer issue is now fixed and submissions can be made till the actual contest end.
@ 2023-04-25 8:14 AM (#31559 - in reply to #31435) (#31559) Top

debmohanty




1000500100100100202020
Country : India

debmohanty posted @ 2023-04-25 8:14 AM

Optimizer Submissions

Submissions to Optimizer puzzles here.

Puzzle 11 and 12 are not checked for correctness. If you notice any incorrect submissions, please help Riad by reporting them.
@ 2023-04-25 3:39 PM (#31560 - in reply to #31435) (#31560) Top

L00ping007



Posts: 11

Country : France

L00ping007 posted @ 2023-04-25 3:39 PM

Puzzle+11%0D%0A%0D%0AScores+5%2C11%2C14+are+miscalculated%0D%0AI+can%27t+find+a+unique+solution+for+the+22+score%2E%0D%0ANo+unique+solution+either+for+the+submission+with+%2A+scoring+21+%28and+there+are+only+5+%2A+around+the+6+in+the+lower+right+corner%29%0D%0A%0D%0AIt%27s+quite+fun+to+solve+manually+the+best+submissions+%2C+some+of+them+are+very+elegant+%21+%F0%9F%91%8F%F0%9F%91%8F%0D%0A

Edited by L00ping007 2023-04-25 3:50 PM
@ 2023-04-25 7:18 PM (#31561 - in reply to #31560) (#31561) Top

Riad Khanmagomedov



Posts: 235
10010020
Country : Russia

Riad Khanmagomedov posted @ 2023-04-25 7:18 PM

%5BQUOTE%5DL00ping007+%2D+2023%2D04%2D25++3%3A39+PM%0D%0A%0D%0APuzzle+11%0D%0A%0D%0AScores+5%2C11%2C14+are+miscalculated%0D%0AI+can%27t+find+a+unique+solution+for+the+22+score%2E%0D%0ANo+unique+solution+either+for+the+submission+with+%2A+scoring+21+%28and+there+are+only+5+%2A+around+the+6+in+the+lower+right+corner%29%0D%0A%0D%0AIt%27s+quite+fun+to+solve+manually+the+best+submissions+%2C+some+of+them+are+very+elegant+%21+%F0%9F%91%8F%F0%9F%91%8F%0D%0A%5B%2FQUOTE%5D%0D%0AThere+were+errors+in+some+of+the+answers%2E+%0D%0AI+also+enjoyed+solving+the+Minesweeper+puzzles%2E%0D%0APreliminary+results+have+been+published%2E
@ 2023-04-26 12:32 AM (#31562 - in reply to #31435) (#31562) Top

Riad Khanmagomedov



Posts: 235
10010020
Country : Russia

Riad Khanmagomedov posted @ 2023-04-26 12:32 AM

Congratulations to Denis, Valentin and Paul!
@ 2023-04-26 1:24 AM (#31563 - in reply to #31435) (#31563) Top

auroux



Posts: 145
1002020
Country : France

auroux posted @ 2023-04-26 1:24 AM

Thank you Riad for what was a very nice (and challenging) contest as usual.
And sorry I wrote some grumpy messages about unclear rules for the optimizer puzzles, it was frustrating in the moment but in retrospect it wasn't such a big deal.
Denis
@ 2023-04-26 2:01 PM (#31567 - in reply to #31563) (#31567) Top

Riad Khanmagomedov



Posts: 235
10010020
Country : Russia

Riad Khanmagomedov posted @ 2023-04-26 2:01 PM

auroux - 2023-04-26 1:24 AM

Thank you Riad for what was a very nice (and challenging) contest as usual.
And sorry I wrote some grumpy messages about unclear rules for the optimizer puzzles, it was frustrating in the moment but in retrospect it wasn't such a big deal.
Denis

Thank you Denis!
I want to thank all the participants and everyone who helped me in the organization. See you soon!
@ 2023-04-26 2:09 PM (#31568 - in reply to #31435) (#31568) Top

Leonardo024




Posts: 19

Country : The Netherlands

Leonardo024 posted @ 2023-04-26 2:09 PM

Thanks for the beautiful contest & congrats do Denis for the victory and everyone else on their efforts as well!

Moreover, I unfortunately submitted column 3 instead of 4 on accident for Navigation, but I have a downloaded image (with time stamp within contest time) of the correct solution that I took from Penpa after finishing the puzzle there, is there a way for me to claim those 6 points, Riad? Or is it just unfortunate?
@ 2023-04-26 2:34 PM (#31569 - in reply to #31568) (#31569) Top

Leonardo024




Posts: 19

Country : The Netherlands

Leonardo024 posted @ 2023-04-26 2:34 PM

Oh%2C+and+I+also+just+noticed+that+I+got+no+points+for+my+submission+of+score+26+to+%22Sapper+Way%22%2C+which+should+net+me+6+points+just+like+Barbitos%2C+Lemesh%2C+leoranger+and+L00ping007%2E+I+just+checked+my+submission+in+the+file+of+%22Optimizer+Solutions%22+and+I+did+send+in+the+correct+one%2C+no+typo+here+%28others+can+verify%29%2E%0D%0A%0D%0AThanks+in+advance+for+looking+into+this+%E2%9D%A4%EF%B8%8F
@ 2023-04-27 12:33 AM (#31571 - in reply to #31569) (#31571) Top

Riad Khanmagomedov



Posts: 235
10010020
Country : Russia

Riad Khanmagomedov posted @ 2023-04-27 12:33 AM

%5BQUOTE%5DLeonardo024+%2D+2023%2D04%2D26++2%3A34+PM%0D%0A%0D%0AOh%2C+and+I+also+just+noticed+that+I+got+no+points+for+my+submission+of+score+26+to+%22Sapper+Way%22%2C+which+should+net+me+6+points+just+like+Barbitos%2C+Lemesh%2C+leoranger+and+L00ping007%2E+I+just+checked+my+submission+in+the+file+of+%22Optimizer+Solutions%22+and+I+did+send+in+the+correct+one%2C+no+typo+here+%28others+can+verify%29%2E%0D%0A%0D%0AThanks+in+advance+for+looking+into+this+%E2%9D%A4%EF%B8%8F%5B%2FQUOTE%5D%0D%0AI+have+noted+that+you+received+6+points%2E+I+now+understand+that+these+points+are+awarded+to+Leoranger%2E+not+Leonardo%2E+We%27ll+fix+everything%2E
@ 2023-04-27 5:49 PM (#31578 - in reply to #31568) (#31578) Top

Administrator



20001000500202020
Country : India

Administrator posted @ 2023-04-27 5:49 PM

Leonardo024 - 2023-04-26 2:09 PM

Thanks for the beautiful contest & congrats do Denis for the victory and everyone else on their efforts as well!

Moreover, I unfortunately submitted column 3 instead of 4 on accident for Navigation, but I have a downloaded image (with time stamp within contest time) of the correct solution that I took from Penpa after finishing the puzzle there, is there a way for me to claim those 6 points, Riad? Or is it just unfortunate?


Can you mail your image to logicmasteradmin@gmail.com? We will look into it.
@ 2023-05-07 9:37 PM (#31596 - in reply to #31578) (#31596) Top

Leonardo024




Posts: 19

Country : The Netherlands

Leonardo024 posted @ 2023-05-07 9:37 PM

Done!