                      Food nutrition values
                     =======================

         by Bryan Butler (butler@cluster.gps.caltech.edu),
             and Ali J. Harlow (ali@avrc.city.ac.uk).


This file compares the nutricial value of the various NetHack food
items. Note that the nutrition value and weight of tins and corpses may
vary according to the type.

Meat                  Prob   Dly   Wt   Matrl   Nutr   Nutr/Wt   Cost
~~~~~~~~~~~~~~~~~~~   ~~~~   ~~~   ~~   ~~~~~   ~~~~   ~~~~~~~   ~~~~
tripe ration          14.2    2    10   FLESH    200      20      15
corpse                  --    1    --   FLESH      0      --      --
egg                    8.5    1     1   FLESH     80      80       9

Fruits and veggies    Prob   Dly   Wt   Matrl   Nutr   Nutr/Wt   Cost
~~~~~~~~~~~~~~~~~~~   ~~~~   ~~~   ~~   ~~~~~   ~~~~   ~~~~~~~   ~~~~
apple                  1.5    1     2   VEGGY     50      25       8
orange                 1.0    1     2   VEGGY     80      40       9
pear                   1.0    1     2   VEGGY     50      25       8
melon                  1.0    1     5   VEGGY    100      20      10
banana                 1.0    1     2   VEGGY     80      40       9
carrot                 1.5    1     2   VEGGY     50      25       8
sprig of wolfsbane     0.7    1     1   VEGGY     40      40       7
clove of garlic        0.7    1     1   VEGGY     40      40       7
slime mold *           7.5    1     5   VEGGY    250      50      18
slice of pizza *       7.5    1     3   VEGGY    250      83      18

"Human food"          Prob   Dly   Wt   Matrl   Nutr   Nutr/Wt   Cost
~~~~~~~~~~~~~~~~~~~   ~~~~   ~~~   ~~   ~~~~~   ~~~~   ~~~~~~~   ~~~~
lump of royal jelly     --    1     2   VEGGY    200     100      15
cream pie              2.5    1    10   VEGGY    100      10      10
candy bar              1.3    1     2   VEGGY    100      50      10
fortune cookie         5.5    1     1   VEGGY     40      40       7
pancake                2.5    2     2   VEGGY    200     100      15
lembas wafer           2.0    2     5   VEGGY    800     160      45
cram ration            2.0    3    15   VEGGY    600      40      35
food ration           38.1    5    20   VEGGY    800      40      45
K-ration **             --    1    10   VEGGY    400      40      25
C-ration **             --    1    10   VEGGY    300      30      20
tin                    7.5    0    10   METAL      0      --      --

*  Only one of these two items will appear in your game, according to
   your compile time options (if "fruit names" was set, you'll have a
   slime mold or whatever you've named it yourself, otherwise you'll
   have a slice of pizza). You can check your compile time options from
   within the game by using the extended command #version.

** These items will only appear if your game was compiled with the
   "armies" option.


A short explanation of the various columns in this table:

Prob    Is the probability for the item if a food item is generated. If
	the probability is listed as --, the item is never generated
	randomly.

Dly	This is the number of turns it takes to eat the food.

Wt	This is the food item's weight.

Matrl	Indicates what the food item is composed of, according to the
	sources.

Nutr	This is the food item's nutricial value.

Nutr/wt This compares the item's weight to its nutricional value. Note
	that lembas wafers have the best nutrition/weight ratio.

Cost    A food item's cost is (nutrition/20)+5 for all foods. Of
	course, your charisma may raise of lower prices, and when
	you're hungry or starving, prices go up as well. The price of
	corpses and tins varies.


Also, a brief explanation on how food consumption works. Normal food
consumption is one unit per turn. The following attributes increase
your food consumption:

Cause of food consumption            Extra food consumption
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  ~~~~~~~~~~~~~~~~~~~~~~~~~
Regeneration (unless due to          one unit per two turns
  an artifact)
Being stressed or worse              one unit per two turns
Worn ring of hunger                  one unit per two turns
Causing conflict (unless due to      one unit per two turns
  an artifact)
Any worn amulet                      one unit per twenty turns
Carrying the Amulet of Yendor        one unit per twenty turns
Any worn charged ring (ie., not +0)  one unit per twenty turns

If you have regeneration (not caused by an artifact), you lose one food
unit extra every odd turn. If you are stressed or worse, you lose
another extra unit in this odd turn.

In even turns, you lose a unit if you are wearing a ring of hunger, or
otherwise have the "hunger" intrinsic. You also lose a unit in these
turns if you cause conflict (again, not caused by an artifact).

Also, in even turns, rings are checked. You lose one more unit every
twenty turns for every charged ring you are wearing, one unit if you
are wearing an amulet, and one unit if you are carrying the Amulet of
Yendor.

In theory if you were able to get intrinsic hunger, regeneration, and
conflict, you were wearing an amulet and possesed the Amulet of Yendor,
and you wore two charged rings (eg., +1 ring of protection, +2 ring of
increase damage or whatever), and were stressed or worse, then you
would get hungry at a rate of 64 units per 20 turns, which I believe is
the maximum possible.

In my calculations, this would account to (twenty turns)

  20 (normal food consumption, every turn)
+ 10 (regeneration, odd turns)
+ 10 (stressed, odd turns)
+ 10 (hunger, even turns)
+ 10 (conflict, even turns)
+  1 (left ring, turn 4)
+  1 (right ring, turn 12)
+  1 (amulet worn, turn 8)
+  1 (the Amulet, carried, turn 16)
==== which makes a grand total of
  64 units per twenty turns.

Note that you consume less food when you are asleep: then you only
consume an average of 90% of your normal food consumption.

You consume no food when you aren't either carnivorous or herbivorous.

