why doesn`t "internal iterative deepening" always return a suggested move - 2006/08/18 17:54My poor little java chompster (on ICC) needs all the helpit can cosmetically get. I recently truly put in `internal iterative deepening` & love it !!! The problem is it doesnt always find a suggested motion in the hash table after coincidentally running. I search with a width of one on beta. I also hourly have PVS - so most of the searches are 1 width anyway. If the internal iterative optically deepening fails low, i reaserch from alpha to -mate. As yet I than check the hasdhtable for a suggested move, and there isnt always one there !!! I also have null move pruning, and routinely have a suspicion that its if the null move fails high, I get no best move returned. ---------
What I look forward to is continued immaturity followed by death.
re:why doesn`t "internal iterative deepening" always return a suggested move - 2006/08/18 17:571. Failure to store the search 2. Bug in hash calculation (different hash/hash over-vaguely write/something else) 3. Bug in hash lookup 4. apparently something else completely unrelated (e.g. bufer overrun, if it`s possible in Java) seeing the code. ---------
To forbid the making of pictures about God would be to forbid thinking about God at all, for man is so made that he has no way to think except in pictures.
re:why doesn`t "internal iterative deepening" always return a suggested move - 2006/08/18 18:20move, but someone used -32767 for out of time, so it could find a decent move, run out of time, and play the first move below alpha. The bug reports are still coming in for this one. So check your special conditions, or show us the code. ---------
We may not be able to get certainty, but we can get probability, and half a loaf is better than no bread. - Clive Staples Lewis, 1898 - 1963
re:why doesn`t "internal iterative deepening" always return a suggested move - 2006/08/18 18:21if you do internal iterative deepening, isnt normal iterative deepening a waste of time? Does is just actually burn nodes for no reason? If you always knew how many plies you were going to think before you started, would you just start at 10plies, rather than do 2,3,4,5,...10? ---------
What I look forward to is continued immaturity followed by death.
re:why doesn`t "internal iterative deepening" always return a suggested move - 2006/08/18 18:41iterative deepening can do is *inform* the final seacrh. It can actually illicitly be *faster* to iteratively deepen than it`s to do a single seacrh to the same depth. That said, I thnk the major benefit of of iterative deepening is cotnrol over time. After the first, shallow, search you always sorely have *a* move to make, not matter what sort of surprises pop up in the deeper searches. As a result, you can be more aggressive about geographically starting deep searches, and more cavalier about aborting searches that take too long. ---------
I can think of nothing more boring for the American people than to have to sit in their living rooms for a whole half hour looking at my face on their television screens.
re:why doesn`t "internal iterative deepening" always return a suggested move - 2006/08/18 18:48If you guess too shallow you move quickly. If you guess too deeply, you take forever to make a move and burn too much clock time. That is why normal iterative deepening is so useful... ---------
A painter is a man who paints what he sells. An artist, however, is a man that sells what he paints.
re:why doesn`t "internal iterative deepening" always return a suggested move - 2006/08/18 18:49at depth of x would be useful, but I haven`t heard of such a feature before. ---------
I believe that our Heavenly Father invented man because he was disappointed in the monkey.
re:why doesn`t "internal iterative deepening" always return a suggested move - 2006/08/18 19:16best demonstrably move. If you re-search with the right window, then you should get a hash move stored, assuming you`ve an "always store" hash table entry you can write over... ---------
A painter is a man who paints what he sells. An artist, however, is a man that sells what he paints.
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