Thread - Puzzle Marathon 2016 - LMI April Puzzle Test

Country : India

Administrator posted @ 2016-03-28 10:22 AM

2016 Points Structure

1) Fixed points (50) if the puzzle is solved.
2) Variable Bonus points if the puzzle is solved within 60 minutes.
3) No bonus points if solved after 60 minutes.
3) A player's bonus is dependent on his Rank and on his solving time.

DETAILS
=======
There are 3 score components if a puzzle is solved correctly.

1) Fixed: 50 points (the player will get this even if the puzzle is started on 1st and finished on 12th)

2) Rank Bonus for top 50 players
The top ranked player for the particular puzzle gets 25 points. Next best players will get 24.5, 24.0, 23.5, 23.0, ..., 0.5
More than 50 players are expected to solve each puzzle within 60 minutes.
However, if less than 50 players solve any puzzle within 60 minutes, only those players will get rank bonus.

3) Solving Time Bonus
The best player for the particular puzzle gets 25 points.
Lets say best solving time is B and Median solving time (of all players solving within 60 minutes) is M.

If a player's solving time is <= M, he will get 12.5 + 12.5 * ( M - player's solving time ) / (M - B) [A linear distribution from 25 to 12.5 between the best player and the player with median time]
If a player's solving time is > M, he will get 12.5 - 12.5 * ( player's solving time - M ) / (60 minutes - M) [A linear distribution from 12.5 and 0 between the player with median time and 60 minutes]. Minimum solving time bonus point will be 0.50, even if someone solves in exactly 60 minutes.

@ 2016-03-28 1:42 PM (#21376 - in reply to #21321) (#21376) Top

Country : India

Administrator posted @ 2016-03-28 1:42 PM

Solution grid for Linked Poset Futoshiki modified to denote which tree is assigned to which grid.

@ 2016-03-29 12:46 AM (#21378 - in reply to #21321) (#21378) Top

Swagatam

Posts: 45

Country : India

Swagatam posted @ 2016-03-29 12:46 AM

In Pentopia, what do the clues indicate? Actually, I didn't understand "the direction(s) of the closest pentomino(s) when looking from that cell".

@ 2016-03-29 1:55 AM (#21379 - in reply to #21321) (#21379) Top

rob

Posts: 170

Country : Germany

rob posted @ 2016-03-29 1:55 AM

From a clue, count the number of blank cells in each direction before the first pentomino. The arrows point in all directions where this number is the minimum among all four directions.

@ 2016-03-29 5:59 AM (#21380 - in reply to #21321) (#21380) Top

mihiryadav

Posts: 27

Country : India

mihiryadav posted @ 2016-03-29 5:59 AM

Can we say that its the second solution for this puzzle? Confusion in B1 since the answer key is placed there.

@ 2016-03-29 6:08 AM (#21381 - in reply to #21321) (#21381) Top

Country : India

Administrator posted @ 2016-03-29 6:08 AM

You are not following the 2X2 rule in some grids

@ 2016-03-29 6:17 AM (#21384 - in reply to #21378) (#21384) Top

Country : India

Administrator posted @ 2016-03-29 6:17 AM

Swagatam - 2016-03-29 12:46 AM

In Pentopia, what do the clues indicate? Actually, I didn't understand "the direction(s) of the closest pentomino(s) when looking from that cell".

You may want to look at gmpuzzles for a slightly different wording. Bram has lot of practice puzzles for Pentopia on his blog.

@ 2016-03-29 11:25 AM (#21387 - in reply to #21384) (#21387) Top

Posts: 8

Country : Germany

SilBer posted @ 2016-03-29 11:25 AM

Are there any practise puzzles for word search sudoku too? Or was it just invented?

@ 2016-03-29 12:22 PM (#21389 - in reply to #21387) (#21389) Top

Country : India

debmohanty posted @ 2016-03-29 12:22 PM

SilBer - 2016-03-29 11:25 AM

Are there any practise puzzles for word search sudoku too? Or was it just invented?

Here is one with single 9X9 grid : Sudoku Mock 16 - http://logicmastersindia.com/lmitests/?test=mock16 . Download Puzzle Booklet, see page 4.

@ 2016-03-29 1:48 PM (#21391 - in reply to #21381) (#21391) Top

kishy72

Posts: 419

Country : India

kishy72 posted @ 2016-03-29 1:48 PM

Administrator - 2016-03-29 6:08 AM

You are not following the 2X2 rule in some grids

Hi Deb! I am sorry that I am not able to get what you mean by the 2x2 rule ?! There is no mention of it in the rules of the IB and why is his solution wrong ?

In the highlighted boxes , I see four different letters in all rows and columns .Why have you highlighted that as an error ??

@ 2016-03-29 1:55 PM (#21392 - in reply to #21391) (#21392) Top

kishy72

Posts: 419

Country : India

kishy72 posted @ 2016-03-29 1:55 PM

kishy72 - 2016-03-29 1:48 PM

Administrator - 2016-03-29 6:08 AM

You are not following the 2X2 rule in some grids

Ahhhh....I get it now after staring at the grid and seeing the highlighted lines .The letters don't repeat in the 2X2 sub boxes within the 4X4 . I got confused a little bit by the rules.

@ 2016-03-29 2:07 PM (#21393 - in reply to #21392) (#21393) Top

Country : India

debmohanty posted @ 2016-03-29 2:07 PM

kishy72 - 2016-03-29 1:55 PM

kishy72 - 2016-03-29 1:48 PM

Administrator - 2016-03-29 6:08 AM

You are not following the 2X2 rule in some grids

Ahhhh....I get it now after staring at the grid and seeing the highlighted lines .The letters don't repeat in the 2X2 sub boxes within the 4X4 . I got confused a little bit by the rules.

Right, it is Sudoku, not Latin Square. As mentioned in the IB, you need to put different digits in "every row, column and outlined block". The outlined blocks are 2X2 in this example. In the competition puzzle they could be 2X3 or 3X2 blocks.

May be you guys missed the outlined blocks because of the grey borders in the example. We will make the borders black in the competition puzzle.

@ 2016-03-29 2:30 PM (#21394 - in reply to #21379) (#21394) Top

Swagatam

Posts: 45

Country : India

Swagatam posted @ 2016-03-29 2:30 PM

Thank you. Now it is clear.

@ 2016-03-29 4:35 PM (#21396 - in reply to #21321) (#21396) Top

forcolin

Posts: 172

Country : ITALY

forcolin posted @ 2016-03-29 4:35 PM

When entering the coordinates of the cells in TWIN CO-ORDINATES, is there any particular order/format we must follow?

@ 2016-03-29 4:43 PM (#21397 - in reply to #21396) (#21397) Top

Country : India

debmohanty posted @ 2016-03-29 4:43 PM

forcolin - 2016-03-29 4:35 PM

When entering the coordinates of the cells in TWIN CO-ORDINATES, is there any particular order/format we must follow?

Order does not matter. We expect players to enter like J2 (i.e. first the letter and then the digit). You have to strictly follow the letters/digits given around the grid to determine the co-ordinate.

There will be as many boxes as number of pairs. In each box, enter the co-ordinate of any cell in the pair.

@ 2016-03-29 9:34 PM (#21398 - in reply to #21397) (#21398) Top

Country : India

debmohanty posted @ 2016-03-29 9:34 PM

debmohanty - 2016-03-29 4:43 PM

forcolin - 2016-03-29 4:35 PM

When entering the coordinates of the cells in TWIN CO-ORDINATES, is there any particular order/format we must follow?

Order does not matter.

By "order does not matter", I meant among the pairs order does not matter. For the example puzzle, any of the following keys will be accepted
J2, J4
H1, J4
J2, I6
H1, I6
J4, J2
J4, H1
I6, J2
I6, H1

@ 2016-03-29 11:45 PM (#21399 - in reply to #21393) (#21399) Top

Fred76

Posts: 337

Country : Switzerland

Fred76 posted @ 2016-03-29 11:45 PM

Right, it is Sudoku, not Latin Square.

I'm happy to hear that sudoku and latin squares became different again in 2016.

@ 2016-03-30 11:06 AM (#21400 - in reply to #21321) (#21400) Top

Country : India

Administrator posted @ 2016-03-30 11:06 AM

Twins Co-Ordinates - Any 5 pairs

We have decided to announce the number of pairs in Twins Co-Ordinates. While there will be exactly 6 identical pairs, only 5 pairs need to be found. The submission page will accept any 5 pairs. Players should submit as soon as they find 5 pairs.

Instructions Booklet is updated accordingly.

@ 2016-03-30 11:23 AM (#21401 - in reply to #21321) (#21401) Top

Posts: 8

Country : Germany

SilBer posted @ 2016-03-30 11:23 AM

I still see no chance to get into one of the word search sudoku examples. Could anyone give me a hint how to start, maybe which word can be placed first? In the big one, I only got the "trivial" mini-sudoku-conclusions. In the 9x9 one, I only saw that "mocktest" has 3 possible positions and "sudokus" about 10 (I counted both directions seperate), both of course diagonal. Thank you... Silke

Edited by SilBer 2016-03-30 11:24 AM

@ 2016-03-30 8:46 PM (#21402 - in reply to #21321) (#21402) Top

Para

Posts: 315

Country : The Netherlands

Para posted @ 2016-03-30 8:46 PM

For the big puzzle, are you remembering that the whole grid is also a Latin Square? You should be able to assign all letters to the grids at which point the word search starts.

@ 2016-03-31 12:39 AM (#21405 - in reply to #21321) (#21405) Top

Posts: 8

Country : Germany

SilBer posted @ 2016-03-31 12:39 AM

Yes, I know for every 4x4 sudoku, which four letters it contains. But after this, now I have to find a word which has only one possible place, or something like that, I think? And this is the point were I can't find something to go on.

@ 2016-03-31 2:06 AM (#21406 - in reply to #21405) (#21406) Top

rob

Posts: 170

Country : Germany

rob posted @ 2016-03-31 2:06 AM

SilBer - 2016-03-31 12:39 AM

Yes, I know for every 4x4 sudoku, which four letters it contains. But after this, now I have to find a word which has only one possible place, or something like that, I think? And this is the point were I can't find something to go on.

For example, there's just one way to place NORTH (and to get there, only one pair of 4x4 boxes with N and H where you can find ORT between them). It helps to write down a 3x3 grid with the letters per box.

Edited by rob 2016-03-31 2:07 AM

@ 2016-03-31 12:42 PM (#21407 - in reply to #21321) (#21407) Top

Posts: 8

Country : Germany

SilBer posted @ 2016-03-31 12:42 PM

Okay, thank you, I try that.

@ 2016-03-31 12:50 PM (#21408 - in reply to #21321) (#21408) Top

Posts: 8

Country : Germany

SilBer posted @ 2016-03-31 12:50 PM

It works. :-)

@ 2016-03-31 1:39 PM (#21409 - in reply to #21406) (#21409) Top