Author: Ernst A. Heinz
Date: 12:05:49 10/10/00
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Hi Mike, >Hi pulsar currently uses R2 (depth-3) nullmove untill maxdepth 7 search then it >kicks in at R3. I noticed that R3 seems to give more depth. Pulsar also uses >futility pruning in search. if material value plus possible capture plus >futility value for that depth <alpha move is not searched. I'm not sure this >futility pruning is so sound so what i was thinking was get rid of pruning in >search and be more aggressive with null move. What are peoples opinions >particularly programmers? I'll probably test this somewhat but its hard to get >games against high rated opponents for pulsar so i'm hoping for some direction >before the testing. You might consider taking a look at my book "Scalable Search in Computer Chess" (http://supertech.lcs.mit.edu~heinz/node1.html). It discusses several forward-pruning schemes including adaptive null-move pruning in Part I: "Forward Pruning without Tears". Please enjoy, =Ernst=
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