Q13

[ShehryarB30]

Could you pls explain this?

[ohthatpatrick]

From the setup, we know that we have
Gw / Fo
and
Hw / Io (this is on wall 4)

We know the second one because every wall will have an 'o' and a 'w', and the only 'w' we can put with Io is Hw.
- Gw is already being used
- Iw can't go with Io because of rule 2
- Fw can't go with Io because of rule 3

If Iw is on 2 and Fo is on 3, we can somewhat update our board (note: my diagram here is really rotated 90 degrees from how it would normally look on my page ... the typing environment doesn't allow as well for the other orientation)

....up.....low
1:
2: (.....Iw...)
3: Gw ... Fo
4: Hw ... Io

Who's left?
Fw, Go, Ho

We know that Fw goes on 1. The Go and Ho pieces could go on 1 or 2.

....up.....low
1: (....Fw..)
2: (.....Iw...)
3: Gw ... Fo
4: Hw ... Io

Still remaining: Go, Ho

(A) YES, this must be on wall 1.
(B) This could be 1 or 2.
(C) This is 3.
(D) This could be 1 or 2.
(E) This is 4.