I must disagree. The difficulty from roguelikes is that unless you cheat and look up the info, you cannot easily understand the problem on your own. In fact, if you want then to follow the spirit of the game to the maximum, you would look up nothing, ever. After all, you should learn it yourself, right? Does it matter if the situation is situational**, or you could not reasonably understand it beforehand? That can still result in defeat.
That's actually a common complaint about the RL genre, even among players. Newer roguelikes are turning away from the need for secret knowledge to progress (as with the lovable but infuriating Nethack), and instead focusing on developing the player's ability to face both the unknown and known situations.
The requirements for DCSS, for example (and this is part of why I love it), specifically state that no 'special' playing knowledge need be gained in order to play the game competently, and even beat it.
For example, in Nethack, the way you find out that a cockatrice turns you to stone is by accidentally touching it. And then unavoidably turning into stone. There is a way to counter this: have a lizard corpse at the ready, and eat it ASAP. There are no indications within the game itself that this should be done. None.
If such a situation were to crop up in DCSS, you wouldn't have this issue, because the overall way to deal with a given creature would be within its description.
And you die anyway, but it's because of a genuine mistake you made, and not because of something there was no way for you to know about. Some people like this challenge, some don't. Some people even prefer the spoiler-required gameplay of Nethack.
The entire game can eventually be completed without spoilers, but a good deal of players sort of play a metagame by swapping play advice and bemoaning stupid deaths.
A very good RL recently came out, it might be more attractive to newer players, because, frankly, it's easy to learn and has good graphics. Five bucks. It's very good. Permanent deaths. But still very good!
Dungeons of Dredmor: http://store.steampowered.com/app/98800/