Author: Ricardo Gibert
Date: 21:56:34 01/19/04
Go up one level in this thread
On January 19, 2004 at 13:50:24, Dieter Buerssner wrote: >On January 19, 2004 at 08:44:41, Gabor Szots wrote: > >>I agree. This is the first time I am expleined what these signs after depth >>mean, although I am not still uncertain about the negative sign (does it mean >>upperbound, i.e. this is a move by which the score will not improve above what >>is displayed?). > >Yes, the minus sign (in typical UCI-GUIs) means an upperbound. So, the engine is >(pretty) sure that the actual score at this depth is not better than the >displayed one. The score might be significantly worse. It will probably search >again (with a more open window) at this same depth, to come up with a better >score/PV. WB-engines have no "official" method to show, that a score is >lowerbound or upperbound or exact. Under the WB-GUI itself some engines indicate >such things by move! (for lowerbound), move? (for upperbound) or similar >methods. WB itself will just display, what the engines says, it wants to have >displayed as PV. Typical commercial GUIs want to interprete the PV (not only >display the string sent from the engine, but for example reformat it with >figurine notation, adding move numbers, etc.), so some unexpected characters >like !, ?, +, - can easily confuse the GUI. > >Regards, >Dieter Thanks for a useful explanation.
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