kingliveson wrote:hyatt wrote:terrigood wrote:Ivanhoe is very unstable. I run a chess engine on the ICC, and I used to use Ivanhoe, but I lost too many games to random crashes.
I have tried just about every version of ip* that is available in source form. In a single 30,000 test run on my cluster, where one opponent (say ip* would play 6,000 games) I get hundreds of core.nnn files from the thing crashing. It wins enough games to show it is very strong, but the crashes make it unusable for accurate measurements.
And I am not talking about using any of the ip* clones that now have a parallel search. I'm talking about single-process/thread testing only.
That's one problem with derivatives. If the original has bugs and is unreliable, so will all the derivative programs.
Am not sure what the highlighted section means. Are you talking about the original Ippolit released source code or the later version renamed to
IvanHoe which source has change significantly?
That's one problem with derivatives. If the original has bugs and is unreliable, so will all the derivative programs.
That is just an inaccurate statement to make.
I am talking about _any_ open-source derivative of ip*. What I tried to explain was that I am _not_ testing using parallel search, which most of these programs seem horribly ill-suited to deal with. I have tested them using a single-thread. So far, not one will play thru its allotted 6,000 games without crashing excessively. Meanwhile Crafty, stockfish, glaurung, fruit, toga, et al play hundreds of thousands of games without a single crash of any kind.
As far as inaccurate statements go, mine was anything but. If you copy 30,000 lines of code, and that code starts with many errors (which ip* certainly had) then those errors get inherited. Plain and simple...
You almost certainly don't play the quantity of games I see or you'd be seeing the crashes as a serious problem too...
No, I have not tested every version. I have tried quite a few that are recommended as functional. Whomever made that classification for the ip* family must work for Microsoft. My standards are quite a bit higher.
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