Ok, I am about to give up
This game is evil.
Any fight below level 15 is deadly, an Ur-Vile will just kill you in 3 blows if you dont have a decent (as in a +3 plate mail) armor equiped, and even so, it will just kill you if you miss two hits.
However, you will be lucky if you are in posession of such thing... because if you by any chance find one, it will be destroyed to nothing as you pass through the Aquators. Off course, you can save this by using a ring of preservation, but if you are *lucky* to find one, you will need to munch a lot of food, which you need to be very lucky to find. And if you find enough food, you wont find a good armor, so it's a no-no game.
Then we have rattlesnakes, and they droping your strength to 10 or less, and not having enough luck to find potions of recover strength.
So, how many times have I written "luck"? yes, you need to be in a lucky strike (a very lucky strike) to have a chance to win. and this chance is so dismal that you just won't win.
Rogue is got its charm, but after level 15 things are just unfair, unbalanced, too depending on luck, and just evil to the player.