Pits and Stone Blocks

[BoloDigby]

Bleeping pits! You think that a thief, having fallen into one, would not fall into the same one again. I clearly see the open pit, and I assume that the player can too. What function or skill governs whether a player, having detected a pit or fallen into a pit in an earlier move, can again fall into the same pit? Encumbrance? Climbing skill?

Same thing for stone blocks.

[JellySlayer]

Perception and dexterity I think.

[Stingray1]

Perception and dexterity I think.

Also, the Detect Traps and probably the Alertness(a little bit) skill.