The contest will run from 8th to 17th December

The World Sudoku and Puzzle Championships for the year 2017 were organized by Logic Masters India from the 15th to the 22nd of October. As organizers we have received the question from many enthusiasts about whether the Sudokus and Puzzles of the competition will be published somewhere.

The answer is that this Championship's puzzles, like all others, will be available for purchase as e-books on the WPF Archive Page next year - http://www.worldpuzzle.org/wpf-archive/. Additionally, the respective member nations of the WPF, including India, may make the content available for their own citizens. If Indians wish to purchase the full content of either Championship, they may send a mail to wspc2017@logicmastersindia.com for more details.

To provide a sample of what a solver can expect from purchasing the content of these Championships, we have selected one Sudoku round and one Puzzle round to be made available publicly on the LMI website. This will also provide a platform for solvers who could not be present at the events to test themselves against the Champions and other world class solvers.

The Sudoku round "What is it?" was already held on LMI in October. For WPC, we have chosen the Marathon round and this contest will contain the puzzles from the Marathon round of WPC.

Darn. I thought this was going to be the annual LMI Marathon :(
Anyway. There are some great puzzles here - good luck to those who didn't attend WPC.

Is there going to be an annual LMI Marathon next year? (Which hopefully will be around February, like usual?)

Also, darn, hoped it was the PIC round.

In "Palindrome", I do not understand the sentence "Two cells, with different letters, cannot have a thick line between them". The example grid has plenty of instances of cells separated by a thick line and containing different letters.

I don't understand the sentence "Each row and each column of subgrids form palindromes." For example in the middle column, the top subgrid only has CB, which is not a palindrome (though if you take the whole column it is a palindrome).

Edited by ghirsch 2017-12-07 8:04 AM

There is only one subgrid - the3x3 box. The other grid is the complete 6x7 grid. For both, the palindrome rule "Each row and each column forms palindromes" holds.

The rule is correct. The example is not. This example will be updated.

A new version of the Instruction booklet has been uploaded, some Answer Key texts have been changed and some details about duration and submissions have been added. Note that though it was mentioned in the earlier version, Instant Grading will not be applied to this contest.

Are you sure you're using the correct example for Palindrome? The example in the WPC IB is very different, and that one has the correct "two cells with different letters are not separated by thick line" rule.

We missed the example in the last version, that has now been replaced with the correct one.

So how do we know whether the whole grid should count as a trivial subgrid or not? In the new example, the rows of the whole grid are not palindromes.

Just ignore my previous reply. It was a wrong example. The rule holds only for subgrids - as mentioned in the rules.

Thanks -- the example in the new IB makes more sense.

Question regarding results: is there a good reason why there is only a "potential results" page rather than the usual page showing everyone's scores to everyone who has finished? I understand instant grading is not always desirable, but since this doesn't seem to involve any optimizers like Riad's contests, having one's score available at the end of the 110 minutes shouldn't be problematic and would be nice to have...

Because the contest lasts for the whole week, not just 110 minutes.

Ah, I see. I got confused by the mix of instructions, some of which suggested it would run as a 110-minute contest, or as the usual marathon, or all week. Now it's clear :) It's being run in Riad-contest-style, and the results are non-announced in Riad-contest-style. Makes sense.

How to attempt and submit these puzzles

You can check out the Contest page link below.

http://logicmastersindia.com/2017/12P/

Download the puzzle booklet which will be found in the top left of the page and start solving the puzzle. When you login in the above page, there will be text boxes for each puzzle to submit the answer key. You can submit the puzzles before the deadline date of December 17 in the text boxes provided.

How do i write the answers in the boxes.Pls explain.

Break in for Nurikabe?

Consider the 26 in the top left corner, and what will happen if it goes to the right, between the 20 and 7.

This should tell you a lot about where the 26 does go, and you can then use similar logic for the 20 for even more of a start.