Author: Tord Romstad
Date: 06:17:17 07/25/04
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On July 25, 2004 at 09:10:19, Stuart Cracraft wrote: >So at the root, in the opening position, I play e4. >At the third ply of iterative deepening, the program >hits the position after 1 e4, e5; 2 Qh5, Bc5; 3 Qxe5. No >null move has been played here due to being in check. >The program now cycles through the only legal black >replies of 3 ... Ne7, 3 ... Be7, 3 ... Kf8, and 3 ... Qe7. >Going into this, alpha is -6 from the previous position. >None of these moves improves alpha and this value is >returned with no best move stored in the hash table. > >My question is: is this a problem or expected given >the position? This sounds like the expected behaviour. At a node where the search fails low (i.e. no move brings the score above alpha), there is no way to know which move is best. If I understand your description correctly, you have no problem to worry about. Tord
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