Don Dailey wrote:
Yes, I know computer chess has advanced. I gave up lazy eval before II happen to disagree with this, but let's not get into that too much as it's not very interesting :)
left computer chess because it wasn't safe unless I used big margins,
at which point it didn't help much at all.
But why MTD no longer used? Is it because MTD is so hard on the hashI assume it's because the difference with PVS+narrow aspiration windows is not very large, many people use pruning or extensions that are alpha/beta dependant, and probing memory keeps getting more expensive.
tables and memory latency is a bigger issue? MTD is much more
dependant on the fact that the search tree remains mostly stored in
memory via the hash tables so I can believe this is possible.
Common are:When you say, "usually not near the leafs", what do you mean? Are you using R=2 near leaf or something else entirely or nothing at all?
That issue has only been fixed this year (2004), and it's still not very great - an infrastructure problem, partly.But there were a number of big problems we had during this tournament which I think your comments are based on: 1. Extremely poor internet connectivity.
2. Bugs. The user interface was incredibly buggy and really hurt
our program.
You were a n00b, in other words ;-)
That particular issue still isn't solved yet, it seems.The tournament director was inexperienced as he made 2 errors,