×because of turn order, roach eggs can delay the goblin

There are several different spots where you can take advantage of this.

×You don't want the queen to ever go back down to row#20, it's too far to reach before spawn

Spoiler:

×The queen needs to be stopped for at least one turn there... otherwise there will be a hole. You want to catch up to her level exactly when she spawns, so the goblin gets blocked by a wall of eggs behind you.

×How do I get the queen to 11,9?

×1. I only have thirty moves alltogether to get the queen there. Before her very first spawn.
2. The goblin chases me until the first spawn.
3. Between me and the goblin is no free field, so I cannot stop at any time.
4. The queen and me (and of course the goblin) will be going up in column 12 because of the small passageway.
5. To get the queen westwards, I have to step to the east.

×The queen always gets stuck in the edge at 10,13.

×All of your assumptions are correct.