I've got a map that needs to be reset on enter and exit, how would I go about doing this.  It's a puzzle map where a player can push certain items to progress though the map, but he can also get stuck and may need to exit and re-enter to start over.

Possibly also may need an inventory item to teleport back out if the player blocks himself in.  Is there a setting I can change or does this need some fancy lua script?

Yes I think Deserted Mine does do this.

One way is by making the map an instance and setting certain flags on the exit(s).

From types.xml:

  <attribute arch="is_male" editor="instance: no reenter" type="bool">
    If set the server will always create a new instance instead of trying to
    use an old one.
  </attribute>
  <attribute arch="is_female" editor="instance: reset instance" type="bool">
    If set AND when the map is loaded as instance the players instance reseted
    so he can't reenter this map without restarting the instance.
    This setting is used for instances which can be reentered. By marking the
    final exit with it when the instance is done the player will have an real
    end of the instance.
  </attribute>

Interpreting the Denglish, I l think this means you can set no renter on exits TO the instance and whenever a player enters it is reset.

And/or you can set reset instance on exits FROM the instance and whenever a player leaves it is reset (effectively when he comes back).

You also COULD do the reset via a script if you don't want to rely on players using exits.

Same also with (effectively) a local /stuck (but scripts on inv items is a bit naughty so you would have, say a SAY or TALK Script in range of the puzzle so when the player says 'i'm a useless noob' it resets.

Excellent thank you, I used the instance map and set the exits accordingly, works great, also added a way out if a player did get stuck.

Now on a completely different subject, I just need to figure out how to kill a mob and not have it say "too low for exp".  I feel like such a noob there must be something I'm missing.  Map difficulty set to 100, mob lvl 110, experience 25,000.... Still says was too low and no corpse.

Here is everything in the text editor:
direction 2
level 110
exp 25000
item_quality 6
dam 99
maxhp 500
wis 2
attack_slow 60
can_reflect_spell 1
type 83
name Troll
face troll.151
race troll
randomitems loot;wealth_normal&D65;loot_base&D17;loot_magic&d27;loot_melee&d22
layer 6
identified 1
is_named 1
item_race 255
item_level 255
corpse 1
alive 1
monster 1
is_male 1
is_evil 1
terrain_flag 1
can_open_door 1
can_see_in_dark 1
can_use_weapon 1
can_use_armour 1
can_use_ring 1
run_away 5
int 10
dex 3
con 15
magic 1
pow 10
sp -1
maxsp 20
hp -1
ac 28
wc 15
thac0 85
thacm 5
item_condition 10
weapon_speed 3.5
resist_cold 75
resist_pierce 25
resist_slash 25
resist_impact 25
resist_cleave 25
resist_fear 100
resist_fire -30
attack_impact 100
speed -0.061
weight 365000
animation troll
is_animated 1
anim_speed 5
no_pick 1