Thanks to all for the answers!

To quote: "Well, you can always ask in this forum. The problem is the organizers or author or test solvers or other players may not be available to answer your questions at that point. There is no others location (e.g. real time chat or something like that) if you are thinking in that direction."

This would be a good solution, but if it is restricted, one wouldn't be able to read the reply.

"The forum is restricted because sometimes, after finishing the test players post too much information/feedback that shouldn't be read by players who have not taken the test. We will decide if we need to keep it unrestricted this time."

Two threads (one for rules Q&A, one for other postings) would solve this problem.

Edited by RALehrer 2014-09-05 1:08 PM

Can someone explain rules of Black and White Sudoku. I am not able to understand it. If there is one solved example for each type, it would have been helpful. The rules can be atleast deduced from the example. Some sentences are complicated.

The below line is confusing.

Somewhere in the grid one digit 1, two digits 2, three digits 3, four digits 4, five digits 5, six digits 6, seven digits 7, eight digits 8 and nine digits 9 are blackened.

There will be 45 shaded cells in the grid. In those 45 cells, you need to put nine 9s, eight 8s, seven 7s, ..., one 1.

(Alternatively, in the 36 white cells, you need to put eight 1s, seven 2s, six 3s, ...., one 8, and zero 9s)

Here you go:






Attachments
----------------
BlackAndWhite_sample.png (17KB - 11 downloads)

Thanks guys for the explanation and example. With respect to T-Crossword Sudoku, I assume that all combinations of words that will fill up the 81 cells will be given. Can you explain the following line.

Within each bold-lined 3×3 square, the cells occupied by letters (numbers) must form a ”T” in any one of 4 possible orientations. --> How this T is determined. What must be the numbers forming this T.

One letter (number) is already placed, and all words must be used. --> Is it one number per T or one number per 3x3 or one number per word.

It is part of the solve to determine how the T is oriented.But just by looking at the example you can safely assume that this T is completely formed by numbers which are given outside the grid.


It can be any of the 3.The deduction that you can arrive at by looking at the 5 which is given in the grid is that the T can be oriented in only 2 out of 4 possible ways.Because in the other 2 ways , 5 won't be a part of the T.The next logical question that you might ask is why should 5 be a part of T ?.Look at these sentences together and you will understand why "Within each bold-lined 3×3 square, the cells occupied by letters (numbers) must form a ”T” in any one of 4 possible orientations.One letter (number) is already placed"(It is implied that the one number which is already placed is part of the T)

If it helps,try reading this sentence in the IB "Within each bold-lined 3×3 square, the cells occupied by letters (numbers) must form a ”T” in any one of 4 possible orientations" in this way--->"Within each bold-lined 3×3 square, the cells occupied by letters (numbers) must form a ”T” comprising only of numbers or part of numbers given outside the grid(Read from left to right or top to bottom) in any one of 4 possible orientations".

In the top left image, if the 5 is replaced by 2, is that valid?Similarly can I replace 2 by 5 in the bottom middle image and 5 to 2,1 to 6 ,2 to 5 in the bottom right image?

See the first two images (top-left and top-centre). One has '5' and one has '2'. One is right and one is wrong. Maybe you should take an actual die and figure out why.

Thanks! I don't expect to be able to complete them all anyway, but it's makes me glad that there is at least a *hope* that I won't have to skip a puzzle that seems particularly fun just because I realize that I can't quite figure out the rules...



Edited by RALehrer 2014-09-06 7:55 AM

Link to score page : http://logicmastersindia.com/2014/09S/score.asp

Please note: feedback tab in score page is disabled this time. Players are requested to leave any feedback directly in this post.

That's precisely what I tried doing, but unfortunately I did not have dice in my possession.That has been taken care of now by sticking numbers on the 6 faces of a cube!(which I had by the way ).The next instant I understood how this sudoku works.Thanks a lot Rohan!

Hi...I am new to this site..Can somebody guide me....

Read the F.A.Q. for a start. If you still have difficulty, feel free to let us know.

Hello,
I can not submit, because I have not Password : LMIMT_M201409S_IB.pdf .
Please give me password.
Thank you
zaitoon

Hello, I have entered the required details but am not able to start. How do I start the test

The test is now ended. So, I can tell you the password. (But you can't participate the test!)
PW: SUdoKu=9X9

LMI September Sudoku Test - Sudoku Day 2014 is now over. 241 players participated, 160 non-zero scores.

Congratulations to deu (Hideaki Jo from Japan), Kota (Kota Morinishi from Japan) and Semax (Sebastian Matschke from Germany) for taking the top 3 places. There were several very hard new sudoku variants but deu and Kota managed to complete the test much before end of time.

I'd like to again thank my test solvers Goran Vodopija, Zoltan Horvath and Rohan Rao (he solved all 9 grids in 98 minutes).

Thank you all for participating. I hope you enjoyed it as much as I creating new variants and following the live results.

Edited by Nikola 2014-09-10 7:46 PM

So, Hideaki can start planning for next year's Sudoku Day? :-)

Thanks for the very nice tournament.
It was fun to have a tournament with only new variations.

My strategy was to solve all sudokus in the order except T crossword which is too puzzlish for me.
I broke the second even product 2 times and had not enough time to try the T crossword during the tournament.

I already look forward to take part in the tournament next year

Fred