17 Mar
2018
17 Mar
'18
11:46 p.m.
I am incapable of stating my puzzle correctly, even though I know exactly what I mean. Why is it so difficult for everyone else? 4th try?: ----- Each square Q is adjacent to exactly 2 others, Q- and Q+, such that each pair ((Q-, Q) and (Q, Q+) is perpendicular and shares one of 2 adjacent edges of Q, and Q- and Q+ lie on opposite sides of the plane of Q. ----- —Dan