- Mon Oct 12, 2020 9:19 am
#79960
Hi MillsV!
To see why the OZ block must be in 4 or 5 on this question, consider the number of blocks we have in this question: JT, KV, and OZ. These are especially constraining when taken in tandem with the rule that N and Y cannot be together.
If you attempt to place the OZ block in positions 1 or 2, you would find that this doesn't allow any possible diagrams except ones in which N and Y are together. Since this would violate the rules, we can infer that the OZ block can't be in either of those slots. If OZ were in the 3rd slot, this might initially seem to work:
J K O N L
T V Z W Y
While placing OZ in the third slot makes it possible to separate N and Y, this diagram ultimately wouldn't work either, because the rules stipulate that W can't be in the 4th slot. Under the local rules of this question, therefore, the OZ block can't be in the 1st, 2nd, or 3rd slots, but it could fit in either 4 or 5.