So - consider this situation: I have a camoed mine on the table. Enemy moves a model somewhere where I do not think it is inside its range. I say no ARO, as I believe the enemy is outside of its trigger area. Second movement takes him definitely inside the trigger area, so I reveal the marker as a mine. HOWEVER, when measuring, we find out that at the end of his first move he was already barely inside the mine trigger area - his first movement should have triggered it. How should this be / have been resolved? You can't premeasure so I can't know for sure if the enemy is inside the trigger area or not, and doing so would give away that the marker is a mine if the enemy model was outside its area.
Mines don't ARO, they trigger. And they will trigger at the first opportunity to do so. It seems to me that you would resolve your situation by by having the trooper declare their entire move, but when they actually move, you place the template and it hits at the first opportunity.
The problem is that his second skill is going to be dependent on if he finds out it is a mine or not. He would not have declared a second move if he knew he triggered a mine. And you cant know if he is in the triggering zone without actually measuring the triggering zone. But once you do that you reveal that the camo is a mine.
You have to eyeball it, unless you want to risk giving it away. I think one of the most important things to learn in this game is knowing how far 8 inches is on a table (pretty sure the small template is 8 inches and the big one is 10, but I could be wrong). One thing you could try to do is ask them to turn around while you check some LoF (insinuating you have a TO unit somewhere) and while you're doing that, drop the template to see if they are in the trigger area.
8.5 and 10.5 inches, respectively. That... thats actually a good solution. Ask for him to turn around for you to check a ARO, and then check for the trigger area.
Hmm, that seems a little disingenuous, but I guess the alternative is that if the mine would have triggered on the first movement, then you would walk back the second short skill (since they should have known the mine would be triggering on the first short skill), and change it accordingly (to dodge, presumably).
It's about the only other work around I can think of with how private information and trigger areas work. The walk back isn't a bad suggestion, but what happens if someone did a move move, ended up just barely in the trigger area (but you didn't think it was in range to trigger it). Then moves further into the trigger area and shoots at a unit that it didn't have LoF on before. The mine could have killed him the order before. How much are you going to walk back, especially in a tournament setting? I'm very happy to allow people to do take-backs, provided it's in the same order. Once you move onto the next, it's too bad, so sad.
Given the lack of premeasuring in Infinity there unfortunately is not a good solution to mine triggers and Zone of Control AROs. These require precise knowledge of distances that you are not allowed to measure. The problem is that you end up "cheating" no matter what - if you do what you did, and overestimate the distance, you denied the opponent the chance to declare a dodge as their second skill and avoid the mine. If you had pulled out the template and it was out of range, however, you would have given them range information they are not supposed to have and allowed them to avoid the mine entirely.
Easy: you "retcon" the trooper's second order to a Dodge, since it is a mine and it is forced to detonate at the first opportunity.
That seems like a fair approach. Additionally if I am unsure whether the first part of my opponent's move has taken them into mine range, once they've committed to the direction they're moving with the second half of their order but before they pick up and move their model I'd tell them to hold up and check the mine's trigger range. If the first move should've triggered it then we have the easy option of just changing it to a dodge and no models need to be physically rewound to a different position.
Kind of like how a model's point cost is hidden information and yet you can have precise knowledge of it.
We always played with a risk/reward model in mind. The deployables (mines, koala, mad traps...) are maybe the only equipment that MUST activate when in AoE. When we are in doubt, we stop a moment, mark the path of the moving model and IMMEDIATELY check the AoE. If the mine is right, it goes off. If the moving model is right, the mine stay camo'ed in place.
