Im gonna take a stab at this! Largely cause I've got nothing better to do at work!
Sabreguy wrote:I was playing against Eldar with me nids and this guys sucubus was t in range of my lash whip but was in range of me and killed me but before this, he still had his three inch pile in, and from what I understand you must get the most models into base combat when possible. He could do that and get in but he has to go off the board to get to me but he finished his pile in on the board, is this legal?
Sabreguy was using his Tyranids vs a Dark Eldar player. There is a combat involving his model(s) with Lash Whips, that is taking place on the board edge. At the start of combat, the squads Succubus wasn't in range of the Lash Whips, so didn't get reduced to initiative 1 which caused him to lose combat. Before his Tyranid model(s) died, he thought that a Pile-in move forced a player to get as many models in base contact as possible. He could (or did) do this, but in order to do it, he had to move the Succubus off the table to get around one of the Tyranid models that was on the edge, but he did finish the Pile-in move on the table. He wants to know if that was legal.
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So there are a few things here that could be causing confusion, or in general would help you out.
1) Lash Whips, you must be in base contact with the model at the start of the combat. If he is not in base contact, then the whips have no effect, even after a Pile-in. While you don't appear to have a problem with this, you did mention it, so just covering a base here.
2) On a Pile-in move, players are forced to get as many models in base contact if withing 3". They do follow all the normal rules for charging found on
pg. 21. So the normal restrictions of not being able to move over friendly/enemy bases, gaps narrower than the moving models base, and contacting models not in the combat still apply.
*Moving off the table edge is generally treated as being impassable, and therefore can only be used for a Pile-in if there is room for the base of the model Piling-in to never leave the edge. It is not uncommon for players to accept that there realistically is 'ground' there and can do things like this. Players generally agree that this is the case before the game begins.
3) This is all assuming that no challenges were involved between the Succubus and the model with the Lash Whip. Im only mentioning this because you are only talking about 2 models, and not 2 units, so it's a possibility. Accepting/Refusing challenges have a different set of rules to getting models into base contact with each other, and the Pile-in rules don't apply.
I HOPE that this is what you were talking about and I hope that this answers your question(s)?