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Riad's April Contest 2021 (23rd - 29th April) Score Discuss
Puzzle Ramayan 2021 - Object Placement (30thApr - 5thMay) Score Discuss

Number Placement - 5th - 11th Mar 2021 - Puzzle Ramayan & IPC Qualifier 2021
   LMI Tests -> Puzzle Ramayan23 posts • Page 1 of 1 • 1
rob
Subject: Re: Number Placement - 5th - 10th Mar 2021 - Puzzle Ramayan & IPC Qualifier 2021 @ 2021-03-03 8:54 PM (#28966 - in reply to #28965) (#28966) Top


Classics & Regions (PR 2016/17) Author

Posts: 168
100202020
Location: Germany
Seems that the instructions for (some?) puzzle types with gappy latin squares are missing the requirement that all digits from the range are placed. (Easy As, Top Heavy, Magic Summer at least.)
prasanna16391
Subject: Re: Number Placement - 5th - 10th Mar 2021 - Puzzle Ramayan & IPC Qualifier 2021 @ 2021-03-04 1:31 AM (#28967 - in reply to #28965) (#28967) Top


PR 2020 (Evergreens) Author

Posts: 1414
1000100100100100
Location: India
Oops.. Thanks for pointing this out! An updated version has been uploaded where the necessary statement is added to all the affected puzzle types. The rules aren't changed on the penpa example links, but I'll make sure the competition puzzle links have the change.
prasanna16391
Subject: Re: Number Placement - 5th - 10th Mar 2021 - Puzzle Ramayan & IPC Qualifier 2021 @ 2021-03-04 3:52 AM (#28968 - in reply to #28965) (#28968) Top


PR 2020 (Evergreens) Author

Posts: 1414
1000100100100100
Location: India

Updates & Notes


- As noted above, a rule was missing from the Latin square puzzles having empty cells which was rectified.
- We also had a person pointing out that the Nanro Signpost rules did not explicitly state that all regions must have at least one number, that has been rectified.
- This contest will see the Penpa contest mode being used for the first time. This mode has no Undo button, no share button, and some other such buttons removed, to negate the unfair advantages compared to solving on paper. The clone button is still available, with the rationale that it is a "choice" similar to printing two copies of a puzzle, or transcribing the grid twice and resuming progress, while the Undo button allows a solver to backtrack their mistakes in addition to aiding bifurcation.
- In the contest, all puzzles that have no blank cells will be set to Sudoku mode. The ones that do will be set to Number mode, at times tabbing with Surface to offer an alternate way of marking empty cells.

BogdanG
Subject: Re: Number Placement - 5th - 10th Mar 2021 - Puzzle Ramayan & IPC Qualifier 2021 @ 2021-03-04 2:56 PM (#28974 - in reply to #28965) (#28974) Top




Posts: 11

Location: Romania
Hello. In TomTom there is precisely one operation applied to all numbers in one region, not at least one operation. Correct?
rakesh_rai
Subject: Re: Number Placement - 5th - 10th Mar 2021 - Puzzle Ramayan & IPC Qualifier 2021 @ 2021-03-04 5:30 PM (#28975 - in reply to #28974) (#28975) Top



Mean Minis (2020) Author

Posts: 771
500100100202020
Location: India
BogdanG - 2021-03-04 2:56 PM

Hello. In TomTom there is precisely one operation applied to all numbers in one region, not at least one operation. Correct?

Example: If there is a 3 cell region with the numbers as 2,3,6 and Tomtom clue as 1, both subtraction and division operations can be applied to get the result.
So “at least” instead of “precise”
auroux
Subject: Re: Number Placement - 5th - 10th Mar 2021 - Puzzle Ramayan & IPC Qualifier 2021 @ 2021-03-04 8:23 PM (#28976 - in reply to #28965) (#28976) Top


Hex Slitherlink Author

Posts: 115
100
Location: France
In "Top Heavy", there is sometimes (often?) a requirement that no 2x2 square can be completely filled by numbers. This is not stated in the IB, but the example is ambiguous (has the "no 2x2 squares property" but can be solved without assuming it).Is the "no 2z2 squares" missing from the instructions, or is it just a coincidence that the booklet example contains no filled 2x2 squares?After looking at the "Top Heavy Tom Tom" example which does have a filled 2z2 square, I gather there is no such rule and it is just a coincidence that the IB example has this property.

Edited by auroux 2021-03-04 8:24 PM
Puzzle_Maestro
Subject: Re: Number Placement - 5th - 10th Mar 2021 - Puzzle Ramayan & IPC Qualifier 2021 @ 2021-03-04 9:22 PM (#28977 - in reply to #28965) (#28977) Top




Posts: 19

Location: UK
I don’t think I’ve ever seen top heavy with a 2x2 constraint. You may be thinking of Fuzuli.
BogdanG
Subject: Re: Number Placement - 5th - 10th Mar 2021 - Puzzle Ramayan & IPC Qualifier 2021 @ 2021-03-04 10:42 PM (#28978 - in reply to #28975) (#28978) Top




Posts: 11

Location: Romania
rakesh_rai - 2021-03-04 5:30 PM

BogdanG - 2021-03-04 2:56 PM

Hello. In TomTom there is precisely one operation applied to all numbers in one region, not at least one operation. Correct?

Example: If there is a 3 cell region with the numbers as 2,3,6 and Tomtom clue as 1, both subtraction and division operations can be applied to get the result.
So “at least” instead of “precise”


Thank you for example, helps me a lot. But when the operation applies, is only one operation at time, not applying a mixture of operations to get the result. As is not 2x3/6 to get 1. Is either 6-3-2, either 6/3/2, correct?
prasanna16391
Subject: Re: Number Placement - 5th - 10th Mar 2021 - Puzzle Ramayan & IPC Qualifier 2021 @ 2021-03-04 11:28 PM (#28979 - in reply to #28965) (#28979) Top


PR 2020 (Evergreens) Author

Posts: 1414
1000100100100100
Location: India

Instruction Booklet with Points uploaded



The Instruction booklet is now updated with the points distribution. Please feel free to download again to check. There is also a line added in green on top of the Skyscrapers example that will be at the top of each page of the PB too, just as a clarification.

prasanna16391
Subject: Re: Number Placement - 5th - 10th Mar 2021 - Puzzle Ramayan & IPC Qualifier 2021 @ 2021-03-05 12:13 AM (#28980 - in reply to #28978) (#28980) Top


PR 2020 (Evergreens) Author

Posts: 1414
1000100100100100
Location: India
BogdanG - 2021-03-04 10:42 PM

rakesh_rai - 2021-03-04 5:30 PM

BogdanG - 2021-03-04 2:56 PM

Hello. In TomTom there is precisely one operation applied to all numbers in one region, not at least one operation. Correct?

Example: If there is a 3 cell region with the numbers as 2,3,6 and Tomtom clue as 1, both subtraction and division operations can be applied to get the result.
So “at least” instead of “precise”


Thank you for example, helps me a lot. But when the operation applies, is only one operation at time, not applying a mixture of operations to get the result. As is not 2x3/6 to get 1. Is either 6-3-2, either 6/3/2, correct?


This is correct.
prasanna16391
Subject: Re: Number Placement - 5th - 10th Mar 2021 - Puzzle Ramayan & IPC Qualifier 2021 @ 2021-03-05 12:38 AM (#28981 - in reply to #28965) (#28981) Top


PR 2020 (Evergreens) Author

Posts: 1414
1000100100100100
Location: India

Password protected Puzzle booklet uploaded



The password protected puzzle booklet is available for download and has 8 pages.

prasanna16391
Subject: Re: Number Placement - 5th - 10th Mar 2021 - Puzzle Ramayan & IPC Qualifier 2021 @ 2021-03-05 12:41 AM (#28982 - in reply to #28965) (#28982) Top


PR 2020 (Evergreens) Author

Posts: 1414
1000100100100100
Location: India

Contest start



The Contest starts in 5 minutes, 00:45 India time.

rakesh_rai
Subject: Re: Number Placement - 5th - 10th Mar 2021 - Puzzle Ramayan & IPC Qualifier 2021 @ 2021-03-05 12:48 AM (#28983 - in reply to #28965) (#28983) Top



Mean Minis (2020) Author

Posts: 771
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Location: India
Just confirming: There is no 2x2 constraint in Top Heavy puzzle.
TiiT
Subject: Re: Number Placement - 5th - 10th Mar 2021 - Puzzle Ramayan & IPC Qualifier 2021 @ 2021-03-07 10:13 PM (#28988 - in reply to #28965) (#28988) Top




Posts: 132
10020
Location: Estonia
I liked the puzzles!

TiiT
rajeshk
Subject: Re: Number Placement - 5th - 10th Mar 2021 - Puzzle Ramayan & IPC Qualifier 2021 @ 2021-03-09 6:01 PM (#28991 - in reply to #28965) (#28991) Top


WSPC Organizer

Posts: 521
50020
Location: India
Nice set of puzzles. All the puzzles were solvable logically. I liked the innovative paths in the Nanro Puzzles.
Thanks, Rakesh. Enjoyed this test a lot.
vopani
Subject: Re: Number Placement - 5th - 10th Mar 2021 - Puzzle Ramayan & IPC Qualifier 2021 @ 2021-03-09 10:52 PM (#28992 - in reply to #28965) (#28992) Top


WSPC Organizer

Posts: 725
50010010020
Location: India
Great set of puzzles, very enjoyable test.

Favourite puzzles:
9x9 Top Heavy
10x10 Nanro Signpost
6x6 TomTom (bottom)

Thanks Rakesh!
A Carton Mutant
Subject: Re: Number Placement - 5th - 10th Mar 2021 - Puzzle Ramayan & IPC Qualifier 2021 @ 2021-03-10 4:27 PM (#28994 - in reply to #28965) (#28994) Top




Posts: 24
20
Location: Turkey
Really nice puzzles with logical solving paths. Still, maybe I should have been a bit more intuitive here and there. :)
My favorites: TomTom 2, Top Heavy 1, Magic Summer 2, Top Heavy TomTom 1.
Thank you!
kishy72
Subject: Re: Number Placement - 5th - 10th Mar 2021 - Puzzle Ramayan & IPC Qualifier 2021 @ 2021-03-10 10:48 PM (#28995 - in reply to #28965) (#28995) Top


SM 2020 (Math) Author

Posts: 395
10010010020202020
Location: india
Set was very balanced in difficulty. Amazingly done!
Enjoyed Top Heavy (12) the most followed by Nanro (7).Thanks for the contest Rakesh. Couldn't have expected a better set !
Administrator
Subject: Re: Number Placement - 5th - 11th Mar 2021 - Puzzle Ramayan & IPC Qualifier 2021 @ 2021-03-11 12:20 AM (#28996 - in reply to #28995) (#28996) Top


2000100010020
Location: India

Contest Extension


The contest is extended by 24 hours and shall be open till Thursday 11:59 PM IST (11th March) - based on requests from some participants.
(Participants must start the test before 11:59 PM on 11th March.)

Administrator
Subject: Re: Number Placement - 5th - 11th Mar 2021 - Puzzle Ramayan & IPC Qualifier 2021 @ 2021-03-12 7:44 AM (#28998 - in reply to #28996) (#28998) Top


2000100010020
Location: India
Thanks to the 283 participants from 39+ countries.

Congratulations to Sam Cappleman-Lynes, Hideaki Jo and Nikola Zivanovic for taking the top 3 spots.

Congratulations to Ashish Kumar, Rohan Rao and Jaipal Reddy for taking the top 3 spots from India.

Thanks to Rakesh Rai for authoring this round!
rakesh_rai
Subject: Re: Number Placement - 5th - 11th Mar 2021 - Puzzle Ramayan & IPC Qualifier 2021 @ 2021-03-12 8:05 AM (#28999 - in reply to #28998) (#28999) Top



Mean Minis (2020) Author

Posts: 771
500100100202020
Location: India
Thanks to everyone who took the time to participate.

Stunning performance from Sam Cappleman-Lynes!. From the submission timings, it seems he got Magic Summer 3 answer key very very quickly (~3:38) and that made a huge difference. Amongst participants from India, Ashish Kumar turned up a very impressive performance - his approach of solving the puzzles in the reverse order worked well.

57 participants completed the set, with seven in the nervous 90s (and many on 84). So, it seems the set was of a decent approachable difficulty level. True to its name, Easy as 123 was the most correctly submitted puzzle - 240 correct submissions; and Magic Summer 3 was, as expected, the least solved - with only 93 participants getting it right.

Thanks for the feedback - Tiit, Rajesh, Rohan, Murat and Kishore. It was the first time I have created Nanro, Magic Summer, Top Heavy and the exploratory types. So the puzzles may have been a mixed bag. As noticed by Kishore, there was an attempt to balance the overall difficulty, although there may have been a skew towards some puzzles. There was an intended attempt to keep the puzzles easier - with inside givens in skyscrapers, lot of clues in Easy as 123, and small cages in tomtom and Nanro - and most participants breezed through them.

The initial version of puzzles had a 10x10 Top Heavy (Range 1-6), an easier / smaller Nanro 3, and less clues in Magic Summer 3. I think all the three changes worked fine.

PR4 is Regions by Swaroop. Looking forward to it.
Administrator
Subject: Re: Number Placement - 5th - 11th Mar 2021 - Puzzle Ramayan & IPC Qualifier 2021 @ 2021-03-12 2:32 PM (#29001 - in reply to #28999) (#29001) Top


2000100010020
Location: India
The Solutions Booklet is now available.
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