Post by steadyeddie on Dec 18, 2016 6:08:46 GMT -8
SteadyEddie is a player based on the sample player (it's still in the "sample" package!) from the GGP course. So it's written in Java, and uses all the Player infrastructure.
One huge advantage SteadyEddie has is that I use Steve and Andrew's propnet from Sancho. That's because when I wrote my player when doing lesson 5 or whatever, I was disgusted to find I could only do 1 rollout per turn in chess, and MCTS needs more than that ;-) So I used their propnet to generate moves and states, as a temporary workaround to writing a decent MCTS player, intending to come back and write my own. But I never did, or never got close if I'm honest. I'm afraid turning GDL into possible moves and states never excited me as much as everything else.
Because I am only using the Propnet for the basics, I don't used Sancho's factorizing powers (or any of the other cool higher level stuff they've written), so SteadyEddie is not factorized.
I also have no hard coded heuristics, like pieces. So it's even more depressing that SteadyEddie can perform at all well by just throwing CPU at the problem.
You can't look a gift horse in the mouth. But also it's true to say that the Sancho propnet is not always stable. Luckily when it seems to fail, it does most often in games that are a bit random anyway. In this case SE drops to using the prover propnet with no MCTS; just rollouts at 1 ply with one thread. That is effective at games like Battlebrushes, where these days SE appears to win with roughly equal frequency to everyone else.
One huge advantage SteadyEddie has is that I use Steve and Andrew's propnet from Sancho. That's because when I wrote my player when doing lesson 5 or whatever, I was disgusted to find I could only do 1 rollout per turn in chess, and MCTS needs more than that ;-) So I used their propnet to generate moves and states, as a temporary workaround to writing a decent MCTS player, intending to come back and write my own. But I never did, or never got close if I'm honest. I'm afraid turning GDL into possible moves and states never excited me as much as everything else.
Because I am only using the Propnet for the basics, I don't used Sancho's factorizing powers (or any of the other cool higher level stuff they've written), so SteadyEddie is not factorized.
I also have no hard coded heuristics, like pieces. So it's even more depressing that SteadyEddie can perform at all well by just throwing CPU at the problem.
You can't look a gift horse in the mouth. But also it's true to say that the Sancho propnet is not always stable. Luckily when it seems to fail, it does most often in games that are a bit random anyway. In this case SE drops to using the prover propnet with no MCTS; just rollouts at 1 ply with one thread. That is effective at games like Battlebrushes, where these days SE appears to win with roughly equal frequency to everyone else.
