Math - 16th - 22nd Apr 2021 - Sudoku Mahabharat & ISC Qualifier 2021
@ 2021-04-15 1:46 AM (#29118) (#29118) Top

Administrator



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Administrator posted @ 2021-04-15 1:46 AM




Link for rules and other details about Sudoku Mahabharat: http://logicmastersindia.com/SM/2021sm.asp
The Instruction booklet is available on the contest page: https://logicmastersindia.com/live/?contest=SM202104



@ 2021-04-15 7:56 AM (#29119 - in reply to #29118) (#29119) Top

Administrator



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Administrator posted @ 2021-04-15 7:56 AM

Points Table


Points table shall be updated on or before 16th April 2021.

@ 2021-04-15 7:57 AM (#29120 - in reply to #29118) (#29120) Top

Administrator



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Administrator posted @ 2021-04-15 7:57 AM

Penpa Tabs


Please use the "Sudoku" tab for all sudokus.
Sometimes the modes reset to something else but are easily changeable as per convenience.
You can also "resize" the grid based on your device and your solving convenience.

@ 2021-04-16 12:34 AM (#29125 - in reply to #29118) (#29125) Top

mstang




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mstang posted @ 2021-04-16 12:34 AM

Is "Partial Killer" different from a normal Killer? What does "Partial" signify?
@ 2021-04-16 2:09 AM (#29126 - in reply to #29125) (#29126) Top

swaroop2011




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swaroop2011 posted @ 2021-04-16 2:09 AM

mstang - 2021-04-16 12:34 AM

Is "Partial Killer" different from a normal Killer? What does "Partial" signify?


Partial is the name which got more famous from the Cracking the Cryptic Channel. Ideally both are same.
But current meta,
Partial Killer is referred where the entire grid is not filled with cages. i.e. Only few cages are given.
Killer - entire grid is covered with cages. There has been quite a discussion in the Discord servers as well. Traditionally both were called Killer.
In terms of solving, there is no difference. Both have the same rules. I guess it's just aesthetic difference.
@ 2021-04-16 10:11 AM (#29129 - in reply to #29118) (#29129) Top

Timjamiller



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Timjamiller posted @ 2021-04-16 10:11 AM

Likely a typo in the instructions, but is there any significance to "Classic SudokuM2" appearing on page 2 in the "About this Episode" section?
@ 2021-04-16 5:37 PM (#29133 - in reply to #29129) (#29133) Top

Administrator



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Administrator posted @ 2021-04-16 5:37 PM

Timjamiller - 2021-04-16 10:11 AM

Likely a typo in the instructions, but is there any significance to "Classic SudokuM2" appearing on page 2 in the "About this Episode" section?
Yes. It is a typo. Please ignore it. It will be corrected in the next version of IB.
@ 2021-04-16 5:40 PM (#29134 - in reply to #29118) (#29134) Top

Administrator



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Administrator posted @ 2021-04-16 5:40 PM

Updated Instruction Booklet


An updated version of the Instruction Booklet is now available at the contest page.

Changes:
1) Points table updated
2) Typo removed from page 2

@ 2021-04-16 8:29 PM (#29137 - in reply to #29134) (#29137) Top

Administrator



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Administrator posted @ 2021-04-16 8:29 PM

Start Time



The contest will start at 11:00 pm today, and will run up to Thursday (22nd April).

@ 2021-04-16 10:07 PM (#29138 - in reply to #29118) (#29138) Top

Timjamiller



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Timjamiller posted @ 2021-04-16 10:07 PM

In the points table, the Equations line appears to be missing a "1".
@ 2021-04-16 10:53 PM (#29139 - in reply to #29118) (#29139) Top

Administrator



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Administrator posted @ 2021-04-16 10:53 PM

Sudoku Booklet


The password-protected Sudoku Booklet is now available at the contest page: https://logicmastersindia.com/live/?contest=SM202104

@ 2021-04-16 10:55 PM (#29140 - in reply to #29138) (#29140) Top

Administrator



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Administrator posted @ 2021-04-16 10:55 PM

Timjamiller - 2021-04-16 10:07 PM

In the points table, the Equations line appears to be missing a "1".
This is fixed now.
@ 2021-04-17 12:55 AM (#29141 - in reply to #29118) (#29141) Top

auroux



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auroux posted @ 2021-04-17 12:55 AM

Either I'm broken or this test is... but in at least one instance the instant grading insists a valid solution is false, while the final results table says it's correct. Another problem seems to have no valid solution, or I'm making a reasoning error (which is entirely possible, given how distracted I got about the correct grid being marked false).
@ 2021-04-17 1:48 AM (#29143 - in reply to #29118) (#29143) Top

Administrator



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Country : India

Administrator posted @ 2021-04-17 1:48 AM

Puzzle Booklet Updated to fix error


There was an incorrect clue in some puzzles. The Puzzle booklet has been changed at 1:45 AM (17th April). Please re-download the booklet even if you have already done earlier.
The solvers who started early and met with the incorrect grids (Partial Killer 9x9, and Product Sandwich 6x6) can send a private message to Administrator for a resolution. We will see if anything can be done.

Sincere apologies for the inconvenience caused.

Update: Product Sandwich 6x6 still broken. You will be unable to start the contest for now while the issue is addressed.

Update: fixed.

@ 2021-04-17 2:23 AM (#29144 - in reply to #29118) (#29144) Top

auroux



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auroux posted @ 2021-04-17 2:23 AM

Ah... now I know why the 30+ minutes I spent on the 9x9 partial killer made no sense...
@ 2021-04-17 5:30 AM (#29145 - in reply to #29118) (#29145) Top

Francwe



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Country : France

Francwe posted @ 2021-04-17 5:30 AM

I think the Puzzle booklet is still the wrong one. In the property of the pdf, the creation date is 16/4/21 22:13:38
@ 2021-04-17 5:50 AM (#29146 - in reply to #29118) (#29146) Top

EctoPlasma




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EctoPlasma posted @ 2021-04-17 5:50 AM

I'm pretty confident that 6x6 Product Sandwich still has no solution. Please look into it
@ 2021-04-17 7:41 AM (#29147 - in reply to #29143) (#29147) Top

sinchai4547



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sinchai4547 posted @ 2021-04-17 7:41 AM

Nice puzzles. But please recheck 6x6 Product Sandwich Sudoku again.

Edited by sinchai4547 2021-04-17 7:42 AM
@ 2021-04-17 8:02 AM (#29148 - in reply to #29118) (#29148) Top

prasanna16391



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prasanna16391 posted @ 2021-04-17 8:02 AM

To those who have completed the contest - ignore the fact that I've submitted the broken puzzle, I did it once I was sure its broken, so that I could end the test and postpone start time so that Rakesh can look into it before more people encounter the error.
@ 2021-04-17 10:00 AM (#29149 - in reply to #29148) (#29149) Top

Administrator



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Administrator posted @ 2021-04-17 10:00 AM

New PB uploaded


A new PB has been uploaded.

This test will not be considered for ratings, and will not be used for SM rankings also. The test starts again.

@ 2021-04-17 7:49 PM (#29151 - in reply to #29118) (#29151) Top

swaroop2011




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swaroop2011 posted @ 2021-04-17 7:49 PM

Wonderful set of puzzles. Unfortunate I couldn't finish the test, but Math is my weak type which I have been trying to improve slowly. Considering I left out only one puzzle, I am happy with the performance. I liked that Classics were more approachable compared to previous SM rounds. I could finish all of those in last 8-10 minutes.
Great work Madhav. Excited to see more contests authored by you in the future.
My favourite: 1) Mathrax 9x9 2) Product Sandwich 9x9 3) Partial Killer 6x6 in no particular order. Wonderful logic.
Thanks to LMI and testers as well.
@ 2021-04-18 3:56 AM (#29152 - in reply to #29118) (#29152) Top

arna




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arna posted @ 2021-04-18 3:56 AM

Thanks a lot for this set of puzzles. Like swaroop2011 I liked the classics because they were more approachable than the March's round.
I have to say I did not understand at all the Sandwich product 6x6 with only numbers from 1 to 5 outside of the grid. If someone can explain me, I would be gladful, thanks a lot.
@ 2021-04-18 6:04 PM (#29155 - in reply to #29118) (#29155) Top

bakpao



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bakpao posted @ 2021-04-18 6:04 PM

I echo Swaroop's comments, math is by far my weakest type but I'm really glad to have gotten through most of the puzzles. A bit bummed I lost perfect completion on all rounds, but if there was going to be a round to break the streak, it was always going to be math :-).
Liked the set a lot, always enjoy Madhav's puzzles! 9x9 mathrax was a wonderful puzzle.
@ 2021-04-19 4:06 AM (#29156 - in reply to #29118) (#29156) Top

Kumaresan R



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Kumaresan R posted @ 2021-04-19 4:06 AM

Very nice puzzle.i feel slightly tough in equation but went well with matrax killer and of course product sandwich. I done mistake in X sum.Thanks to madhav and rakesh for good contest.
@ 2021-04-19 6:53 PM (#29157 - in reply to #29118) (#29157) Top

kheti



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kheti posted @ 2021-04-19 6:53 PM

Very nice set of puzzles. I was stuck with the 9*9 Partial Killer and had to use Phistomefel's ring theory to solve it in my spare time. Was that the desired solve path or was I overcomplicating things?
@ 2021-04-20 12:35 PM (#29158 - in reply to #29157) (#29158) Top

paramgoswami



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paramgoswami posted @ 2021-04-20 12:35 PM

I dont think so phistomefel is required.. i just saw that box 7 needed 1 and 2 outside of the 17 and 25 cages, and 1 cant be in the 19 cage. then i used the same in box 1 and got 2 and 3 out of cages. I started like this
@ 2021-04-20 11:04 PM (#29159 - in reply to #29118) (#29159) Top

kishy72



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kishy72 posted @ 2021-04-20 11:04 PM

Thanks Madhav Sankaranarayanan for a very fun set. It was a nice challenge to get through all the sudokus. Mathrax took a lot of time for me but had a nice solve path.

Favourites are Product sandwich (9x9) and X Sums (9x9). Hope to see more contests authored by you in future. Well done !
@ 2021-04-21 12:45 PM (#29160 - in reply to #29118) (#29160) Top

saumyaas



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saumyaas posted @ 2021-04-21 12:45 PM

What time does the Episode 4 - Math close for participation?
@ 2021-04-21 9:02 PM (#29163 - in reply to #29157) (#29163) Top

Madmahogany



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Madmahogany posted @ 2021-04-21 9:02 PM

Hi!

The killer doesn't require the implementation of Phistomefel's ring. The intended beginning involves inclusion-exclusion counting of the boxes 1,4 and 7, and the rest is fairly straightforward killer combinations. Hope this helps.

@ 2021-04-22 8:41 PM (#29167 - in reply to #29118) (#29167) Top

rajeshk



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rajeshk posted @ 2021-04-22 8:41 PM

Nice Puzzles Madhav. Very logical puzzles. Classic Puzzles were very enjoyable. Looking forward to seeing more contests by you.
@ 2021-04-23 2:15 AM (#29168 - in reply to #29118) (#29168) Top

Madmahogany



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Madmahogany posted @ 2021-04-23 2:15 AM

Thank you everyone for your kind comments! Had a lot of fun setting some of these variants.
@ 2021-04-23 11:17 AM (#29172 - in reply to #29118) (#29172) Top

Administrator



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Administrator posted @ 2021-04-23 11:17 AM

Thanks to the 342 participants.

Thanks to Madhav Sankaranarayanan for some innovative puzzles in this round!

Those who missed taking part in this test can still take this test unofficially.

@ 2021-04-24 9:08 AM (#29178 - in reply to #29118) (#29178) Top

Anu G



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Anu G posted @ 2021-04-24 9:08 AM

I am not a Math student so did not expect to solve any variant especially since it was authored by a young Math whiz. I am glad I managed to solve both the Mathrax and the 6by6 equation :). I wasted a lot of time on the 9by9 equation sudoku but kept breaking. The classics were very good. I look forward to solving the other variants at leisure.