Mistwell
Crusty Old Meatwad
Page 192. Variant: Playing on a Grid
Yes. And? He's asking about the general rules, not a rules variant. I'm guessing he'd have mentioned that as it would be pretty relevant.
Page 192. Variant: Playing on a Grid
Yes. And? He's asking about the general rules, not a rules variant. I'm guessing he'd have mentioned that as it would be pretty relevant.
I'll have a go at this...
#1 - Yes, both attackers have (1/2) cover vs. one another.
#2 - Yes, but the moving enemy draws an AoO (for exiting the square in front of the door, which they're partially entering/leaving).
#3 - No, the moving enemy is partially moving through an occupied square. They'd need to spend an action & make some sort of contested check to shove/dodge around the other character).
These questions are all covered in the rules. In the Basic PHB, check Movement Around Other Creatuers, Page 71, Playing on a Grid pg. 71 and Cover pg. 74.
1. Yes, attacking can happen with 3/4 cover.
2. No. You cannot move diagonally across a wall, tree, or other object that fills a space. The enemy needs to move into the room and then sideways.
3. No. Because the enemy cannot move diagonally, he has to move into the room, and the PC is blocking the way. If there was a significant size difference (or a halfling), they could do it as difficult terrain worth 20' of movement.
If using the variant rules for Playing on a Grid, then It would not be possible to move diagonally by anyone because a diagonal movement can’t cross the corner of a wall;
Corners: Diagonal movement can’t cross the corner of a wall, large tree, or other terrain feature that fills its space.
I have the same answers as most everyone else (1 half cover bonus, 2 not allowed, 3 not allowed), but I wanted to point out that in the case of number 2, the enemy could move (north) through the door and then move (west) into the yellow square. This requires two squares of movement and provokes an OA, but it is still legal. Unless there is some hazard in the square immediately north of the door, there would be no reason to attempt a diagonal move to the yellow square since it would provoke regardless (and even best cast, it would still be difficult terrain to move directly northwest around the wall, so it would typically take the same amount of movement).