Switching Places with a Larger Creature

[Camelot]

What happens when a Medium or Small creature switches places (like with the monk's at-will attack dragon's tail) with a creature larger than it? I'm particularly stumped when a creature or obstacle is blocking the placement of the larger creature.

Currently, I'm ruling that, after the switch, each creature has to occupy a square that the other creature occupied before the switch. You simply move into that position via the shortest way possible, and don't provoke OAs (since it's not technically a "move"). Obstacles just stump me. Examples:

L = Large creature, M = possible locations for Medium creature, which the creature doing the switching chooses, O = obstacle

1)
. . . . . . / / . . . . . .
. .L.L. . . / / . .M.M. . .
. .L.L. . . --> . .M.L.L. .
. . . .M. . / / . . .L.L. .
. . . . . . / / . . . . . .

2)
. . . . . . / / . . . . . . / / . . . . . .
. .L.L. . . / / . .M.L.L. . / / . .M. . . .
. .L.L.M. . --> . .M.L.L. . -OR . .M.L.L. .
. . . . . . / / . . . . . . / / . . .L.L. .
. . . . . . / / . . . . . . / / . . . . . .

3)
. . . . . .
. .L.L. . .
. .L.L.C. . --> ???
. . . .M. .
. . . . . .

 

[DracoSuave]

Currently, I'm ruling that, after the switch, each creature has to occupy a square that the other creature occupied before the switch. You simply move into that position via the shortest way possible, and don't provoke OAs (since it's not technically a "move"). Obstacles just stump me. Examples:

Specifically, you shift to their space, they are slid to your space. This allows for a lot of possibility for creatures who occupy multiple squares.

L = Large creature, M = possible locations for Medium creature, which the creature doing the switching chooses, O = obstacle

1)
. . . . . . / / . . . . . .
. .L.L. . . / / . .M.M. . .
. .L.L. . . --> . .M.L.L. .
. . . .M. . / / . . .L.L. .
. . . . . . / / . . . . . .

2)
. . . . . . / / . . . . . . / / . . . . . .
. .L.L. . . / / . .M.L.L. . / / . .M. . . .
. .L.L.M. . --> . .M.L.L. . -OR . .M.L.L. .
. . . . . . / / . . . . . . / / . . .L.L. .
. . . . . . / / . . . . . . / / . . . . . .

Both of these are perfectly legal.

3)
. . . . . .
. .L.L. . .
. .L.L.C. . --> ???
. . . .M. .
. . . . . .

In this case there is a legal slide the large creature can take to occupy your space.

3)
. . . . . .
. . . . . .
. . .M.C. . --> ???
. . .L.L. .
. . .L.L. .[/QUOTE]

It would require a greater obstacle to make a swap illegal.

 

[Camelot]

So you're allowed to slide the creature more than one square to reach your space, as long as you don't slide it away from you?

So say you're attacking a large creature between two pillars:

. . . . . .
. .L.L. . .
. .L.L.O. .
. . .O.M. .
. . . . . .

In that case the swap would just be illegal.