Author |
Topic: bot_bomb update (Read 5591 times) |
|
fotland
Forum Guru
Arimaa player #211
Gender: 
Posts: 216
|
 |
bot_bomb update
« on: Nov 13th, 2004, 12:44am » |
 Quote  Modify
|
bot_bomb is much stronger now.
I have two versions of bot_bomb. I developed it as a windows program with a GUI and many debug features. Getmove.exe just used pipes to communicate file names to the gui program.
Right before the match last January, I ported it to Unix, which meant creating a getmove.exe that does the search, without a gui, and only uses Unix APIs.
I've been using the unix code, running on Windows for the last week or so it has been on the server. But it seemed to be playing much weaker moves than I expected, and its rating was dropping steadily.
Today I figured out why. The Unix version had a bug that was disabling the goal search and some of the complex evaluation terms.
It's fixed now, and should be noticably stronger.
|
|
 IP Logged |
|
|
|
99of9
Forum Guru
Gnobby's creator (player #314)
 
Gender:
Posts: 1413
|
|
Re: bot_bomb update
« Reply #1 on: Nov 13th, 2004, 7:33am » |
Quote Modify
|
Ahh that explains it. I'll be interested to give the real bomb a spin sometime soon. Do you mean that even the version that played Omar in the challenge was handicapped
|
| « Last Edit: Nov 13th, 2004, 7:34am by 99of9 » |
IP Logged |
|
|
|
fotland
Forum Guru
Arimaa player #211
Gender:
Posts: 216
|
|
Re: bot_bomb update
« Reply #2 on: Nov 13th, 2004, 9:33am » |
Quote Modify
|
I don't think the version that played Omar last year was handicapped. When I made the commercial version I added some parameters to the evaluation to optionally weaken it so beginners would have a fun game. The unix version didn't initialize them properly.
|
|
IP Logged |
|
|
|
Fritzlein
Forum Guru
Arimaa player #706
Gender:
Posts: 5928
|
|
Re: bot_bomb update
« Reply #3 on: Nov 13th, 2004, 10:58am » |
Quote Modify
|
Ha ha! Was Bomb's evaluation function set to "medium" or "weak"?
It reflects badly on me that I was so eager to conclude that I had gotten better rather than Bomb weaker.
OK, now we start over. I can hardly wait to see if any of the strategies that recently worked against Bomb still work now. I may lose a few rating points finding out. 
|
|
IP Logged |
|
|
|
fotland
Forum Guru
Arimaa player #211
Gender:
Posts: 216
|
|
Re: bot_bomb update
« Reply #4 on: Nov 13th, 2004, 6:34pm » |
Quote Modify
|
The evaluation was set to medium, and it had 1% chance to throw away any move at the first step without looking at it.
Tomorrow I should have a version that won't let the elephant be smothered.
|
|
IP Logged |
|
|
|
omar
Forum Guru
Arimaa player #2
Gender:
Posts: 1003
|
|
Re: bot_bomb update
« Reply #5 on: Nov 14th, 2004, 11:03pm » |
Quote Modify
|
In the one game that I played it so far since it's been on again, it did feel like a lot weaker than the version I played against in Feb 2004.
|
|
IP Logged |
|
|
|
fotland
Forum Guru
Arimaa player #211
Gender:
Posts: 216
|
|
Re: bot_bomb update
« Reply #6 on: Nov 15th, 2004, 12:00am » |
Quote Modify
|
New Update Sunday evening right before F's game. Fixed some evlauation bugs, added evaluation to maintain access to center for Elephant, and made big changes to the static exchange evaluator.
With luck it is stonger, but who knows until there are some test games. Let me know if it seems stronger.
|
|
IP Logged |
|
|
|
fotland
Forum Guru
Arimaa player #211
Gender:
Posts: 216
|
|
Re: bot_bomb update
« Reply #7 on: Nov 16th, 2004, 9:32am » |
Quote Modify
|
I updated bomb. The change I made Sunday encouraged it to give up rabbits and cats to keep the enemy elephant tied up. It should be better now.
|
|
IP Logged |
|
|
|
fotland
Forum Guru
Arimaa player #211
Gender:
Posts: 216
|
|
Re: bot_bomb update
« Reply #8 on: Nov 17th, 2004, 2:20am » |
Quote Modify
|
New version. It was valuing long range weak threats to trap a piece high than rabbits.
|
|
IP Logged |
|
|
|
fotland
Forum Guru
Arimaa player #211
Gender:
Posts: 216
|
|
Re: bot_bomb update
« Reply #9 on: Nov 19th, 2004, 12:16am » |
Quote Modify
|
New version. Fixed lots of trap evaluation bugs.
|
|
IP Logged |
|
|
|
fotland
Forum Guru
Arimaa player #211
Gender:
Posts: 216
|
|
Re: bot_bomb update
« Reply #10 on: Nov 23rd, 2004, 2:16am » |
Quote Modify
|
new version (speedy). More pruning, cut nodes by factor of 2 to 8. It will search deeper, but it will also miss some things when evaluation has a bug.
|
|
IP Logged |
|
|
|
fotland
Forum Guru
Arimaa player #211
Gender:
Posts: 216
|
|
Re: bot_bomb update
« Reply #11 on: Nov 25th, 2004, 4:42pm » |
Quote Modify
|
New speedy. cut node count again, fixed some eval bugs.
|
|
IP Logged |
|
|
|
fotland
Forum Guru
Arimaa player #211
Gender:
Posts: 216
|
|
Re: bot_bomb update
« Reply #12 on: Nov 27th, 2004, 2:24am » |
Quote Modify
|
New version. Fixed some search bugs that caused strange moves. Node count is down again. It generally finds 12 step goals in under a second now, and 16 step goals average about 20 seconds.
|
|
IP Logged |
|
|
|
fotland
Forum Guru
Arimaa player #211
Gender:
Posts: 216
|
|
Re: bot_bomb update
« Reply #13 on: Nov 28th, 2004, 1:49am » |
Quote Modify
|
New speedy. Adjusted threat values. In some situations it valued a threat higher than the piece, so it would try to keep the piece threatened without taking it off the board.
|
|
IP Logged |
|
|
|
PMertens
Forum Guru
Arimaa player #692
Gender:
Posts: 437
|
|
Re: bot_bomb update
« Reply #14 on: Nov 28th, 2004, 3:51pm » |
Quote Modify
|
Actually that might even be a good idea against a bot.
Especially if the threat can be easily maintained ...
|
|
IP Logged |
|
|
|
|
Home
Help
Search
Members
Login
Register
Reply
Notify of replies
Send Topic
Print