Fantasy Movie League optimizer
Switch branches/tags
Nothing to show
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Failed to load latest commit information.

fml - A Fantasy Movie League™ Solver

Copyright (c) 2017 Po Huit

fml is a Python program that optimizes Fantasy Movie League™ picks. The solver finds an optimal lineup given prices and predictions: both prices and predictions must be provided by the user.

Note that Fantasy Movie League Analyzer is a web-based tool that provides most of the functionality of this tool, as well as a comparables finder, all with a lovely GUI. You should probably just use that unless you really want to nerd out. Let me know what features you are still wishing for in my Github Issue Tracker, and I'll see what I can do. Patches are especially welcome.


This program should work with Python 2, Python 3 or PyPy. (Python 2 is likely to be fastest, while PyPy is likely slowest [!] due to compilation time.) Try fml out on the provided sample by running

  python lineup.csv

The input may also be provided on standard input.


The input is a CSV file. Each row contains the name of the movie, the price of the movie in dollars, and predicted values for that movie in millions of dollars (fractions are ok, can be preceded with a dollar sign). A movie can have several predictions, separated by slashes. All but the last should have a percent probability of that prediction, separated by a percent sign from the value. The last value gets the rest of the probability.


The output for the provided sample input should look like this:

  1x Mr. Hero [Sun] (VR 1.04, BP 7%)
  3x Car Heists (VR 1.06, BP 7%)
  2x Carbots (VR 1.14, BP 7%)
  2x The Dwelling Horror (VR 1.30, BP 9%)

The entries here are the number to pick, the film title, the value ratio (expected return in dollars/FMLbuck, with 10M/1 being 1.0), and the Best Performer probability estimated percentage.


I follow Wilhelm Arcturus's excellent blog The Ancient Gaming Noob, and have been really interested and amused by his reports on the Fantasy Movie League™ game he and his friends have been playing.

I started playing with a Linear Programming solver a while back with the idea of bringing some mathematical optimization to FML players. Only after building a program for lp_solve did I understand the rules well enough to get that the objective is not linear. The penalty for blank screens and the bonus for screens with the best bargain need to be included in the objective function. These bonuses and penalties make it nonlinear (and non-differentiable).

The only open source code for dealing with linear constraints and nonlinear objectives I could find in a quick search was written in FORTRAN and looked to be really hard to use.

So I wrote from scratch the solver you see here. I eventually joined Wilhelm's League, and will be updating this tool as I play my first season. In my warmup the last week of the current season, this tool guided me to an almost-best lineup.


The exchange rate between price and value appears to be $100K box-office per dollar in showing cost.

This solver uses memoized depth-first search in the space of screen assignments. The solver is not algorithmically super-efficient. However, the instance size here is small so it turns out not to matter.

I used Python, because apparently I wanted my program to be as slow as feasible. Turns out it's plenty fast anyhow, running in less than 0.1s in Python 2 on the provided sample lineup on my box.

The solver takes the $2M penalty per empty screen into account, as well as the $2M bonus per best-performer screening. The bonus is handled probabilistically, computing an expected return based on the ratio of the positive-performing estimates converted to a probability.

This solver handles only the easy part of the problem. Getting good estimates to feed it is the real challenge, and the whole point of FML. Probably a machine learner could be trained, but I'm out of energy — I'll leave that task to other, even geekier FML afficionados.

My current direction for this tool is faster search to support bigger, automatically generated ensembles for better reliability.


This program is licensed under the GPL version 3 or later. Please see the file COPYING in the source distribution of this software for license terms.