I'm stuck.
I assume that you have to kill both seep on the west side before trying to get through the corridor, and one on the east side in the process?
And that you have to do the whole thing and reach the south wall before the roach queen can hit the pressure plate on either side, and deal with her latest spawn at the same time?
Which means...
(1) If you send the roach queen westwards:
Assuming all the rest is successful, the queen is now in the southwest corner, backed up against the west wall (7,28). Beethro is on the southern wall, facing west after having dealt with the roach spawn. The two remaining seep are still on the eastern side of the corridor, in the walls (19,24) and (20,24).
And I have no means of driving the queen *northwards*. She is directly west of me: I must step one more row to the south: the only way to make her move northwards is to step on the southeastern pressure plate. Which of course makes a seep step on the arrow...
Alternatively if I send the queen eastwards, I can get her off the southern wall by stepping on the SW pressure plate, but I then can't send her back west again.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[EDIT] Somehow I managed to get it to work by
Click here to view the secret text
× getting to the south wall fast enough that a normal roach spawned *behind* the queen and blocked her retreat before she could reach the wall (after several previous attempts where the western roachalready moved north to let the queen retreat, before I could reach the southern wall...) and then being able to round the queen and get into the SW pressure plate chamber.
After that it was reasonably doable,
Click here to view the secret text
× because I managed to get the queen stuck precisely in the doorway just after the two free seep had crossed the closed door from east to west, followed by my opening the door again for the roach queen to pass.
[Last edited by JLE at 10-22-2016 05:44 AM]