[rules-users] Re: Drools-solver -- solution questions
Tabu search (and other local search algorithms such as simulated
annealing) are very good at a) find an optimal solution.
Unfortunately, it can't handle b) get the total number of solutions.
I 'd recommend a brute force or better yet a branch-and-bound (with alfa
and beta pruning) algorithm for b).
In both cases you can reuse some of the internals of drools-solver:
- your constraint rules in the drl files won't change.
- you can reuse the score mechanism which uses the drools rule engine
Due to the forward-chaining nature of the drools rule engine those
algorithms too can take advantage of the scalibity and performance boost.
Hey, if you do it right, you can write a BruteForceSolver and/or
BranchAndBoundSolver which would be very welcome as a patch to
drools-solver if you're willing to contribute it :)
With kind regards,
Geoffrey De Smet
Andrew Waterman schreef:
Hello,
I'm starting to work with the drools-solver to help on a gaming
project. Basically, we have a game that works in two modes: 1) a
competitive game where humans (or agents) compete with one another on a
well defined game board to achieve 24 points by using three (or four)
agricultural development tokens. 2. A puzzle, where all 4 players work
cooperatively to create an equitable solution, where all 4 players win
with at least 24 points by means of our agricultural development tokens.
I am starting to work with drools-solver to address the puzzle part of
our game. Basically, we are interested in having the solver do two
things for us: a) find the optimal solution for our game/puzzle, based
upon our requirements [this part seems quite straightforward] and b)
getting the total number of solutions that satisfy our constraints. We
would like, as well, to be able to inspect these other, sub-optimal,
solutions, in order to explore our game and puzzle further. From my
reading of the "Solver" API , it looks like we will only be able to get
the optimal solution. Does anyone have any suggestions for a workaround
in this case? Or is there some functionality in the solver that I am
missing?
I look forward to your feedback.
best wishes,
Andrew
---------------------------------
Andrew Waterman
San Cristóbal de las Casas, Chiapas, Mexico
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