by dan Mon Oct 05, 2009 1:41 pm
Hey Mike. Thanks for the post. You're referring to questions that ask you to figure out "how many of the elements are completely determined." These questions are really really tough, unless you have a good diagram drawn. I think you'll find that a solid diagram takes care of the issue. Let's look at the game that you're asking about (PT42, S1, G2).
Did you have the following two frames laid out in your diagram? (Remember that L -- G, for example, means L sometime before G, not necessarily immediately before G, whereas PT means P immediately before T):
F -- PT -- L -- G
OR
F -- TP -- L -- G
We have to keep in mind that M is a floater; it can basically go anywhere.
So, #8 tells us there is exactly one bay between M and G. If this is true, we know M can't go after G in this case (b/c there'd be nothing that could go between M and G). In fact, the only possibility in either frame from above is for M to go immediately before the L:
F P T M L G
F T P M L G
Regardless, we know that the F is first, M is fourth, L is fifth, and G is sixth. We're not sure about P or T. P could be second and T third, or vice versa. Thus, we know the positions of four of the elements for certain. Answer (C) is correct.
Now that you've got the diagram down, see if you can use a similar approach to work through #12.
Again, these questions can be tricky if your diagram isn't strong. Focus on getting your diagram in shape and I think you'll find that these questions become a lot easier.
Hope that helps!
dan