For deficit surplus it's not clear what the rules are for areas with exactly 8 cells. Must the digits 1 - 8 appear or can we not operate under that assumption? In other words, are repeat digits in 8 cell areas forbidden? Thanks.

Right, there is an ambiguity.
The rule should be "In regions with less than or equal to 8 cells, digits should not repeat"

Posted a Filler Sudoku for practise: http://rohanrao91.blogspot.in/2015/06/indian-sudoku-championship-20...

Hi Rohan,

In your filler sudoku,total shaded cells should be 45, its 44 here and 5 is appearing only 4 times in shaded cells

Yes, I missed a shaded cell. Its fixed now.

Here's a nice Triomino Sudoku I just solved by Ashish Kumar - https://solvetheunsolvable.wordpress.com/2015/06/27/puzzle-38-triomi...

Note that its pretty difficult though.

Yeah its very tough please someone provide any solving tips.
and about odd even view what are its basic solving strategy

Really enjoyed solving this one. Well constructed.

Triomino (specifically Ashish's) - Note exit points for corner boxes. If a triomino 'goes out' of the corner box, there needs to be another place where it 'comes in' to make up the numbers. So if there aren't two exit points, the box must contain the entire triomino within itself. As a general tip for this variant I suggest having two sets of markings, one for cells which will contain a Triomino, and the other for cells which must contain digits (which isn't necessarily limited to just the cells with givens/solved digits).

Odd Even View - Where there are two clues, the rules force one of those clues to be in the first cell from that direction. If there is a side that is entirely double-clued like the example in the Instructions booklet, then whatever digit occurs only once (e.g. 8) needs to be in the first cell of that direction, since, using the first sentence, it can't be anywhere else. Also, as a general tip here, it is useful to have two sets of markings, one for 'cell containing odd digit' and another for 'cell containing even digit', these can be useful without placing a digit at all. For instance if you solve the IB one, you should get 2 in R9C1 which forces R7R8R9C3 to be odd and that can be marked to keep track.

Actually, generally speaking, all boxes must have 0, 2 or 3 exit points. No box can have 1 exit point.

Posted one Odd Even View Sudoku for practice
http://www.funwithpuzzles.com/2015/06/odd-even-view-sudoku.html

For a moment I thought it was the same puzzle as in the IB. The clues are positioned the same and there is also that pair of 1 and 4 on the left side :)

Rishi

Hi Not able to submit the answers. its says submission before 28th june 1645hrs will only be considered

Hi, am not able to submit the answers, i guess the answers submitted before 28th june 1645 hrs will only be considered.

Competition booklet isn't released yet, so not sure what answers you want to submit. If its the demo page answers, please check that you are on this link -
http://logicmastersindia.com/2015/ISC_Demo/?online=1
And not this one -
http://logicmastersindia.com/2015/ISC/?online=1

The second one will only be active tomorrow during competition time.

Can I solve some on Paper and key in the marked rows/columns and use LMI interface for some?

Yes. Of course.

I also posted a (difficult) Triomino Sudoku.
https://prasannaseshadri.wordpress.com/2015/06/28/puzzle-no-509-trio...

I'm not able to find the sudoku booklet.

Remember that only the password protected sudoku Booklet has been uploaded and the password to open it will be accessible only at 2PM IST.So don't panic ,if new users are able to download the booklet but unable to open it before 2PM.

Good luck to all!!

Kishore

Is wrapping considered in Search 9
For Instruction booklet sudoko 25) can I conclude row8-col9 can only be 1/2 ... If sudoko wrapping allowed, then it can be 1/2/6/7


Edited by aakash 2015-06-28 12:48 PM