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Analysing Hit Probabilities |
Some time ago I was trying to work out a way of having simpler range brackets, by the looks of my jottings here, as well as the possibility of going over to D20 dice. As it happens it became a thinking out loud on paper exercise into deciding I didn't want to change anything after all.
As it stands, I measure the range, go to the combat chart, get the penetration %, adjust the % for the usual reasons, then roll the dice. As you can guess, very few guns are similar enough to group together in such a chart if you look at their stats closely enough but three categories of weapons did fall into line with each other somewhat: small arms; 13.2mm-47mm; & 75mm-150mm.
Don't get me wrong, I am reasonably happy with the eight range brackets I currently use (Point Blank, Close, Short, Intermediate, Medium, Long, Distant & Extreme). The WRG WW2 rules I used to use felt wrong when either side of a certain range gave a vastly different hit probability. I just wanted to see if I could work out a simplification without increasing the probability steps noticeably or bending the penetration data overmuch by using Point-Blank, Short, Medium, Long and Extreme ranges.
Having not quite ironed out very many of the wrinkles in that idea I then wanted to see if I could devise a way of rolling a handful of D6 for however many attackers were firing within these simplified range brackets, getting back to a long-abandoned group suppressing fire concept I toyed with a few years ago. I am sure it has been done in other rule sets.
Imagining that hit probabilities tail off rapidly towards the end of a trajectory's arc and increase alarmingly at point-blank ranges, I surmised that there might be a largish section in the middle where although, percentages are changing, they are more gradual than at the extremes. Not being a ballistics expert, this was going to be something which was merely required to work in a gaming context, not give very silly results and make everything simpler.
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All well and good but although the possibly easier to remember range brackets might have resulted in slightly less range table checking there was now going to have to be a roll for penetration, something I did not really want. It could never be factored into the one dice roll, not without, off the top of my head, probably a hit chart for every gun.
Quite an enjoyable bit of noodling about with ideas, nevertheless, if only to conclude I like things how they are.