Dann Corbit wrote:yanquis1972 wrote:hey michael, don't know if the 'readme' on the DL site is new or i just noticed it, but
For overnight analysis, I suggest setting the matefinder option on , Tactical to 3 or 4, and respect to minus 15.
is that for any (generally speaking) position, or extremely difficult positions with a solution?
at what level would tactical be set to to replicate the level of houdini 5 (or 3, since i think this is faster in some positions) tactical search? at what level do you think it goes beyond usefulness in the overwhelming majority of positions?
finally -- what settings would you recommend for, say 1hr analysis? 10min? (i assume default, maybe w/ some level of contempt) 30min? (i don't expect you to have any answer to these, & certainly not a definitive one, just asking out of curiosity)
I guess that all the answers to your questions will depend very much on what sort of machine the program is running.
32 bit with one core?
64 bit with 128 cores?
Something in-between?
I guess it will also vary a lot depending on position. Tactical settings tend to be important for things like zugzwang positions. On the other hand, closed positions usually need immense depth and so tactical settings are counter-productive.
I'm replying to Dann's post - but this for everyone. Just to pointout, the question being asked is how one find the best move ( and we're not testing engines here - we just want to know the best move)
Even before you do overnight analysis - try these steps - do all of these steps WITHOUT clearing hash in between = you want to benefit from the searches you already did, You also want to do this with big hash - but 4096 is big enough - I have found 8192 almost too big.
1. Default mode - let it run 10 minutes - once it completes - , note the last pv and white moves 2 and 3 for the side you are interested. Moves w1 b1 w2 b2 w3 b3 - note moves w1, w2 and w3. Do searches of these moves will searched by themselves using searchmoves.
1b If you are in a suspected zugzwang position - repeat step 1 with null move off.
1c If you think you have tactical shot involving a sac, repeat step 1 but with matefinder on and tactical set to 3.
1d. Leave the settings as they are and change mutilpv to 3 - - and note the top 3 moves. Test those by themselves using searchmoves
In theory you might now have possibly 12 moves. but in reality you might have 4 or 5 moves or less to real focus on.
Fortress type positions and very deep tactical shots are probably searched best as is.
Shallower tactical shots are often found best by following the procedures above in 1. For sacrifices , use the searchmove option on the sacrifice move you believe might that will work.
Finally - do not be tied to one engine, use K1101, use Houdini 5, etc in addition to SF/McB . They all have their strengths and weaknesses in different posiitons.
Also do not be afraid to walk through moves with the analysis on - moving pieces back and forth and trying different lines WITHOUT clearing HASH - you will be surprised what turns up when you do that.
