For simplistic view... AG for Stalk and SD for Hide.
But it is a complex issue. (It's Rolemaster after all!)
These are the MAIN contributing factors in the success of the skill.. RMSS/RMFP withthe 3 stat combo allows a little more leeway with regard to the bias that a Stat has upon the effectiveness of an attempt (many systems do not specify a stat but use the most appropriate for the situation. Because of the relative complexity of applying the bonuses, it's not so easy with RM).
Intuition/Reasoning should figure highly in both... where to hide/step?, however situational modifications mostly cater for these..
This reminds me of the Monty Python sketch...
H.M. GOVERNMENT, PUBLIC SERVICE FILM NO. 42 "HOW NOT TO BE SEEN"
(Cut to a wide-angle shot of hedgerows, fields and trees.)
Voice Over (JC): In this picture there are forty-seven people. None of them can be seen. In this film we hope to show you how not to be seen.
This is Mr. E.R. Bradshaw of Napier Court, Black Lion Road London SE14. He cannot be seen. Now, I am going to ask him to stand up. Mr. Bradshaw, will you stand up please?
(In the distance Mr Bradshaw stands up. There is a loud gunshot as Mr Bradshaw is shot in the stomach. He crumples to the ground.)
This demonstrates the value of not being seen.
(Cut to another location - more shrubs and trees.)
In this picture we cannot see Mrs. B.J. Smegma of 13, The Crescent, Belmont. Mrs. Smegma, will you stand up please?
(To the left of the area Mrs Smegma stands up. A gunshot rings out, and Mrs. Smegma leaps into the air and falls to the ground dead. Cut to another area, however this time there is a bush in the middle.)
This is Mr Nesbitt of Harlow New Town. Mr Nesbitt would you stand up please?
(longish pause)
Mr Nesbitt has learned the first lesson of not being seen. Not to stand up. However he has chosen a very obvious piece of cover.
(The bush explodes. Cut to another scene with three bushes.)
Voice Over: Mr. E.W. Lambert of Homeleigh, The Burrows, Oswestly, has presented us with a poser. We do not know which bush he is behind. But we can soon find out.
(The left-hand bush explodes, then the right-hand bush explodes, and then the middle bush explodes. There is a muffled scream as Mr. Lambert is blown to bits.)
Yes, it was the middle one.
(Cut to a panning shot across a river in the woods.)
Mr. and Mrs. Watson of Hull chose a very cunning way of not being seen. When we called at their house, we found that they had gone away on two weeks' holiday. However, a neighbor told us where there were.
(The camera pans around and stops on a obvious looking tent, which blows up. Cut to a house with a gumby [MP] standing out front.)
And here is the neighbor who told us where they were...
(He blows up, leaving boots and dark red smoke behind... Cut to a shack in the desert.)
And here is where he lived ...
(shack blows up - cut to an old stock footage building, entirely washed-out in red)
And this is where he was born...
(it blows up fantastically, debris sliding down)
(Cut to a small bit of forest. A man in a dinner jacket, a very straight BBC-type announcer complete with desk and microphone, is laughing hysterically in the distance. The camera zooms in on the announcer. Not seeing, he keeps laughing. Then he spots the camera, does a quick double take, and hurriedly collects himself.)
Announcer: And now for something completely different.
(He explodes. Drum roll...)
