User:Bumber

Climbing Safety

Non-climbable walls are as easy as putting a floor jutting out on the side you don't want creatures climbing from.

z	+	1			_	_	_
z	+	0		→	g	█	_	_

Goblins don't get in, dwarves don't get out. This works because you can't hold onto the side of a floor tile. No tile may be held from the bottom, with the sole exception of tree branches.

Don't try to substitute the floors for walls or fortifications:

z	+	2			→	→	↘
z	+	1		↗	█	_	█	↙
z	+	0		→	↖	█	→	g

They'll climb diagonally upwards and over.

This, however, is a safe overhang:

z	+	2			_	_		_	_
z	+	1			█	█	_	█	█
z	+	0		→	→	g	█	_	_	_

Any combination of floors/fortifications/walls works for the top, as long as they protrude out at least two tiles.

Safe minimalist fortifications:

z	+	2			_	_
z	+	1			╬	_	_
z	+	0		→	→	g	█	_

The roof prevents archers from jumping off the wall and charging the enemy.

Creatures cannot jump up z-levels. They can jump straight through fortifications while hanging on the side, although not necessarily will always.^Bug:8160

Potentially unsafe:

z	+	2		_	_	_
z	+	1		→	╬	↘
z	+	0		→	↖	█	→	g

Lastly, always be wary of trees. It goes without saying that they are the enemy of dwarfkind. Trees can be used by invaders as siege towers to leap onto your walls. A paved road around your walls is an effective way of holding back the wooden menace.