detuned - 2017-10-04 1:56 AM

11 Outside Sequence

Looking at the example, the ? at the top it seems to me can only validly be replaced a 4. This runs in direct contradiction to the instructions which state that "a ? should be replaceable by any digit from 1 to 9". The ?s on the left of the grid suggest that in fact the ? might validly take multiple values (e.g. 1,5 for row 4 and 4,8 for row 6). Could you please confirm that the ? might validly take multiple values for the competition puzzle?

I think it would also be helpful to explicitly state that the "arithmetic progression" is not necessarily in order (the grid does make this fairly clear) - contrary to what might be inferred by use of the word "progression".

vopani - 2017-10-04 3:44 AM

Yes, the '?' can take multiple values, like the IB example. It is not required to fill in the question marks to get points. Will get this added in IB.

It is already mentioned that the arithmetic progression is not necessarily in order.

akash.doulani - 2017-10-08 5:46 PM

Big small count Sudoku
Does 4 inside a circle imply 4 neighbouring numbers greatest than 4 and 4 neighbouring numbers less than 4 . Or we could have one of these conditions in this case ?