Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021
Administrator
Subject: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-09 9:30 AM (#29356) (#29356) Top


2000100010020202020
Location: India



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=SM202107



Administrator
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-09 4:15 PM (#29357 - in reply to #29356) (#29357) Top


2000100010020202020
Location: India

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.
CTRL + F5 (cache refresh) in case penpa loads out of place.

auroux
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-09 7:30 PM (#29358 - in reply to #29356) (#29358) Top


Hex Slitherlink Author

Posts: 116
100
Location: France
Minor thing: the 9x9 Toroidal Odd Even shows some dark edges along the boundary of the grid that shouldn't be there, as the cell on the other side belongs to the same region.(At the top/bottom of columns 2, 6 and 8; at the left/right of rows 6 and 8).Less minor: that grid has multiple solutions. For example one can swap portions of the top and bottom rows: e.g. the 5 and 7's in columns 1 and 3 can be switched, or the 2489's can be switched between rows 1 and 9, columns 2,5,7,9.

Edited by auroux 2021-06-09 7:49 PM
rakesh_rai
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-10 12:47 AM (#29359 - in reply to #29358) (#29359) Top



Mean Minis (2020) Author

Posts: 774
500100100202020
Location: India
auroux - 2021-06-09 7:30 PM

Minor thing: the 9x9 Toroidal Odd Even shows some dark edges along the boundary of the grid that shouldn't be there, as the cell on the other side belongs to the same region.(At the top/bottom of columns 2, 6 and 8; at the left/right of rows 6 and 8).Less minor: that grid has multiple solutions. For example one can swap portions of the top and bottom rows: e.g. the 5 and 7's in columns 1 and 3 can be switched, or the 2489's can be switched between rows 1 and 9, columns 2,5,7,9.

Both valid points. Thanks for bringing them out. These will be fixed tomorrow. Couple of givens were missed out in the IB example.
EctoPlasma
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-10 7:46 AM (#29360 - in reply to #29356) (#29360) Top





Posts: 11

Location: Japan
Can the colour of Extra Region cells in Extra Region-Thermo be a little more lighter? Or is this the lightest possible in order to distinguish shaded cells from themometers?
Administrator
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-10 11:52 AM (#29362 - in reply to #29360) (#29362) Top


2000100010020202020
Location: India
EctoPlasma - 2021-06-10 7:46 AM

Can the colour of Extra Region cells in Extra Region-Thermo be a little more lighter? Or is this the lightest possible in order to distinguish shaded cells from themometers?
Thanks for mentioning this before the contest start. We shall try to come with an alternate display mechanism to resolve this issue.
Administrator
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-10 11:56 AM (#29363 - in reply to #29356) (#29363) Top


2000100010020202020
Location: India

Updated Instruction Booklet


An updated version of the IB has been uploaded at 11:50 AM, June 10. It can be downloaded from the contest page.

Changes:
1) Toroidal 9x9 example - Border issue fixed
2) Missing givens added in Toroidal 9x9 example
3) Extra Regions Thermo 6x6 and 9x9 - Darker shade of extra region changed to dotted squares for better solving experience.

Thanks auroux and EctoPlasma!

NathalieC
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-11 2:08 AM (#29366 - in reply to #29356) (#29366) Top




Posts: 1

Location: FRANCE
There are two solutions for the Extra RĂ©gion-Thermo of the IB: 1 and 8 in rows 6 and 8 can be reversed.
mandourin
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-11 2:24 AM (#29367 - in reply to #29356) (#29367) Top




Posts: 2

Location: France
Looks like the 9x9 example of Extra Regions Thermo has two solutions: deadly pattern on R68L46. Otherwise, this round looks very exciting!
Administrator
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-11 11:12 AM (#29371 - in reply to #29356) (#29371) Top


2000100010020202020
Location: India

Updated Instruction Booklet


An updated version of the IB has been uploaded at 11:15 AM, June 11. It can be downloaded from the contest page.

Changes:
1) Extra Regions Thermo 9x9 Example - Fixed.

Thanks NathalieC and mandourin!

Administrator
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-11 1:47 PM (#29372 - in reply to #29371) (#29372) Top


2000100010020202020
Location: India

Sudoku Booklet


The password protected Puzzle Booklet is now available for download.

1) In Arrow-Palindrome sudokus, the palindrome line will be darker and the arrow line will be lighter.
2) In Extra Regions - Thermo, the extra region cells will NOT be shaded and will be indicated by dotted squares.
3) Puzzle Booklet has 9 pages.

gaurav.kjain
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-11 2:40 PM (#29373 - in reply to #29356) (#29373) Top


SM 2020 (Irregular and Outside) Author

Posts: 52
2020
Location: india
All the best to everyone.
supriya29
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-12 5:33 PM (#29376 - in reply to #29356) (#29376) Top




Posts: 1

Location: india
where can i practice sudoku variants
aashay
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-12 6:33 PM (#29377 - in reply to #29356) (#29377) Top




Posts: 45
2020
Location: India
Beautiful set of hybrid sudokus, probably the best set of this year's SM. Really enjoyed solving the sudokus. Favorites include Extra Region - Thermo and Little Killer - Outside. They had sublime logic. Thanks Gaurav for the sudokus!
TiiT
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-12 7:44 PM (#29378 - in reply to #29356) (#29378) Top




Posts: 136
10020
Location: Estonia
Hi, may I ask to create another pdf with darker shaded cells with the same password?
Another way is if you can confirm that the puzzle booklet will have darker shaded cells comparing to IB.

The problem is that the shaded things (cells, arrows, palindromes, thermos) in IB are not visible at all. It's not encouraging to start solving.

Note: The gridlines are flawless that are coming out of my printer and also the coded letters are very nicely visible.

TiiT
Administrator
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-12 9:23 PM (#29379 - in reply to #29378) (#29379) Top


2000100010020202020
Location: India
TiiT - 2021-06-12 7:44 PM

Hi, may I ask to create another pdf with darker shaded cells with the same password?
Another way is if you can confirm that the puzzle booklet will have darker shaded cells comparing to IB.

The problem is that the shaded things (cells, arrows, palindromes, thermos) in IB are not visible at all. It's not encouraging to start solving.

Note: The gridlines are flawless that are coming out of my printer and also the coded letters are very nicely visible.

TiiT
Ok. Based on your feedback a second PB PDF shall be made available on or before Sunday (13 June).
Administrator
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-12 9:34 PM (#29380 - in reply to #29356) (#29380) Top


2000100010020202020
Location: India

(Second) Sudoku Booklet


A second password protected Puzzle Booklet shall be made available on or before 13 June 2021.
The link for the second Puzzle Booklet will be made available on this forum thread.

There will be no changes in the sudoku grids themselves but there will be changes in some of the arrows, lines and shading.
There will be no changes to the penpa links for online solving.

This can be useful for participants with printers which do not print lighter shades well.

Kumaresan R
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-13 3:56 AM (#29381 - in reply to #29356) (#29381) Top




Posts: 24
20
Location: india
Very nice set of puzzles..favorite is LK-Outside and Thermo- ER. Thanks Gaurav and Rakesh.
lakshmisv
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-13 11:30 AM (#29382 - in reply to #29356) (#29382) Top




Posts: 21
20
Location: india
I had a crazy problem - the pdf shows penpa link of both the first and second sudokus as the same. The third sudoku pointed to a different page. Pls check
rakesh_rai
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-13 1:09 PM (#29383 - in reply to #29382) (#29383) Top



Mean Minis (2020) Author

Posts: 774
500100100202020
Location: India
lakshmisv - 2021-06-13 11:30 AM

I had a crazy problem - the pdf shows penpa link of both the first and second sudokus as the same. The third sudoku pointed to a different page. Pls check
Penpa links for first two are different (Small f and CAPITAL F). The third sudoku link points to the correct sudoku - I just re-checked. Did anyone else face this issue?
Administrator
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-13 1:19 PM (#29384 - in reply to #29383) (#29384) Top


2000100010020202020
Location: India

(Second) Sudoku Booklet now available


A second password protected Puzzle Booklet has been made available at 13:15 PM on 13 June.

Link for the Booklet: Click here
- There are no changes in the sudoku grids themselves
- There are changes in the shading of arrow lines (11,12), thermo shapes (17,18) and odd even cells (9,10). The odd even shaded cells are also outlined with black colour.
- There are no changes to the penpa links for online solving.

This PDF is expected to be useful for participants with printers which do not print lighter shades well.

mandourin
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-13 7:15 PM (#29385 - in reply to #29356) (#29385) Top




Posts: 2

Location: France
A great set again. I loved Arrow Palindrome. My favorite was Coded Consecutive Pairs 6x6.
TiiT
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-13 7:42 PM (#29386 - in reply to #29356) (#29386) Top




Posts: 136
10020
Location: Estonia
Thank you for the effort of making another version of the puzzle booklet. I really appreciate that you were willing to do it, although it would have been also ok if you didn't do it. It definitely was helpful when I solved odd-even puzzles and at start it was excellent. The gridlines of toroidals were pretty fat though - but no problems in there, it was nicely solvable and it didn't bother me. But arrows and thermos were still basically missing. There was something visible, but it was impossible to tell where they situated - so I did redraw all of them.

After the competition I also downloaded the 1-st version of puzzle-booklet and printed the thermo out and the gray was completely missing from that page.

It made me rethink - maybe there must be something wrong with my printer or settings. I took files from different competitions (earlier GP rounds, some national championships which I tested earlier and WSC files which I have and some other files I have) and printed out puzzles with arrows, palindromes, thermos, shaded cells, ... ... and all of them are perfect. All the gray is perfectly visible in all the pages I printed out.
It just cannot be my problem and I have no idea why the gray from LMI competitions doesn't print.

-----

But the puzzles were really nice and enjoyable. I found them pretty challenging, but they are very nicely constructed. I enjoyed the whole set.
P.S. The classics were very easy this time and it was possible to get the answer keys pretty early. There are significant blank cells left in those pages with classics.

TiiT

Edited by TiiT 2021-06-13 7:43 PM
lakshmisv
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-14 9:36 AM (#29387 - in reply to #29383) (#29387) Top




Posts: 21
20
Location: india
Thanks Rakesh. I guess I must have done something equally silly with the third link which is why I got that crazy response!
harmeet
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-14 1:19 PM (#29389 - in reply to #29356) (#29389) Top


SM 2020 (Converse and Odd Even) Author

Posts: 79
202020
Location: India
Very good set of puzzles Gaurav. The 6x6 coded pairs stood out for me. Other awesome creations were ER Thermo 9x9 and Little Killer-Outside 9x9. Thank you!
Administrator
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-16 8:24 PM (#29395 - in reply to #29356) (#29395) Top


2000100010020202020
Location: India

Contest Extension


This contest is extended by 22 hours and shall be open officially till Thursday 10:00 PM IST (17th June).
(Participants must start the test before 9:59 PM on 17th June.)

Administrator
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-17 11:44 PM (#29398 - in reply to #29395) (#29398) Top


2000100010020202020
Location: India

Thanks to the 335 participants, and the 52 finishers.

Congratulations to Kota Morinishi, Endo Ken and Jakub Ondrousek for taking the top 3 spots.

Exceptional performance from Kota!

Also, Congratulations to Prasanna Seshadri, James Peter and Kishore Kumar for taking the top three spots from India.

Thanks to Gaurav Kumar Jain for authoring this round! Excellent creations in the hybrid genre. Extra Regions 9x9 was the least (correctly) submitted grid. Surprisingly both coded consecutive pairs also had less correct submissions.

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

gaurav.kjain
Subject: Re: Hybrids - 11th - 16th June 2021 - Sudoku Mahabharat & ISC Qualifier 2021 @ 2021-06-19 8:15 PM (#29409 - in reply to #29398) (#29409) Top


SM 2020 (Irregular and Outside) Author

Posts: 52
2020
Location: india
Thanks to all the participants. This is slightly different type of hybrids than usually seen, Most struggle in 6x6 consecutive pairs-coded, but it is very easy after getting possible A and F coded values [34]. Congratulations to the winners and specially Kota who just sprinted through. Special mention to James Peter, who took 2nd place among Indian participants and look very promising.