Spoiler for Thank you, a little more, pleaseI gather there is an observer who is looking at the row, and sees it from Observer's Left to Right. And, from what you said, the person on Observer's far left is wearing Red.
(1) When you say that "Chi has two facing backward on his right", does "backward" mean "facing away from the observer", or does it mean, "facing the opposite of Chi"?Chi's "his left/right" refer to Chi orientation
Spoiler for(2) In the same case, does "on his right" mean "to the same side of the line as Chi's right hand" , or does it mean "to the same side of the line as Observer's right hand" [ I assume it means Chi's right hand ) or right side
(3) Do the captives know that the person on Observer's far left is wearing Red? Yes, like reading, left to right :ROYGBVW