Aside: The Maths of Fighting Fantasy

This blog, at least in name, talks about the maths of RPGs. Most of the time I actually just want to talk about RPGs, ideas and what happened the other night at the table, but I thought the following video was worth sharing, as it follows on a little from my post about Murderous Ghosts from last week, and also from the post that noisms made about us playing it at the weekend.

I'd recently been thinking about doing something similar to what this video does with Island of the Lizard King, which I found in a charity shop, but there is no way I could do it as much justice as this video does.

One follow-up question does occur: I wonder how much difference there is in the graph structure of the various Fighting Fantasy books?

And another interesting problem that might be do-able: what is the probability that a person actually makes it to section 400, given the skill/stamina that they start with?

There's some work in figuring that out, but it's essentially coming up with a general formula for calculating the odds of surviving an encounter, and figuring out the various general paths through the book (taking into account when you come across things like traps that you have to roll under skill or suffer penalties). To solve it you would build up a couple of general results, then plug in numbers. Not simple per se, but not hard... The actuarial tables of the Island of the Lizard King...

Back From Being Away

In my "day job" I am a freelance skills trainer who works with PhD students and researchers in general. I do various things, most of which is to get people thinking about their skills, what they can do to develop them and maybe more importantly how they want to develop them (getting them to reflect on what they want).

This week I was away tutoring on a week-long course in the Lake District. And as a bonding exercise we were all (on the tutor team, and also on my tutor group) talking about guilty pleasures or things that we do for hobbies. And a couple of times I mentioned how much I've enjoyed playing tabletop RPGs over the last year or so (which is when I got into it). On the last night in the bar someone asked me "so what is a tabletop RPG?" followed by "is that the same as LARPing?"

We talked about it for a bit, and she was genuinely amazed at the thought that there was more than one system (i.e., that there wasn't just Dungeons & Dragons). Not in a malicious way, but because it was so far removed from her experience. In talking about it I described tabletop role-playing as

"Collaborative story-telling between two or more people; typically one person will facilitate the game, and the others will take on the roles of individual characters; the remaining one person will take on the role of any other character in the world of the game, and respond to the other players' actions and requests for description about the world; if the outcome of any proposed action is in doubt then typically dice are rolled according to some game mechanism; other materials can be used depending on the type of game; some games require players and the game facilitator to keep track of details of attributes that their characters have."

Or at least I said something close to that. I'm sure it is a trope of people blogging about games to ask, but what would you say to someone who has little to know experience of tabletop role-playing games?

The Vornheim Question

Just a short post: I mentioned last week that I had a really great games night on Thursday with Patrick, who was DMing LotFP with the Vornheim book for part of the proceedings. In particular I know that the mission/quest for the evening was based around a character and location featured in Zak's book. Thursday was great.

So here's the problem: should I get and read Vornheim, given that I thought the details Patrick used were really cool and I want to see what the rest of the place is like, or as a player in a campaign that I dip my toe into occasionally, am I cheating Patrick - as DM - of the opportunity to run a session, given that I might pick things up that could provide me with "spoilers"?

#nerdworldproblem

Ammo Maths

Almost as soon as I posted Tracking Ammo it dawned on me that an obvious series of questions arises:

• If I find a handgun with a 5 rating, what's the likelihood that I will get at least ten shots from it?
• If I have a shotgun with a rating of 3, how many shots am I likely to get from it?

More generally:

• If I have a gun with a rating of X, what is the probability, p,  that I get N shots from it?
• If I have a gun with a rating of Y, how many shots, Z, am I likely to get from it?

These questions are all inter-related, so a bit of thought on one or the other will start to get some answers. I'll have a think and get back to you over the coming days.