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Subject: This is getting boring

Author: Gian-Carlo Pascutto

Date: 07:12:25 01/30/02

Why are you blindly assuming that their effective branching factor
is 40, just because that is the average number of legal chess
moves? You should know better. And I know you do.

They used PVS. Aspiration windows. Hashtables for the first TWELVE
plies. Even futility pruning.

I tested this. I crippled my program. No hashing in the last 6 plies,
no nullmove, no pruning except futility, all extensions on.

I didn't get an effective branching factor of 40. Far from it.

The _worst_ I saw was around 20, on _average_ it was only about 10 or
even less.

Now, let me do your math again.

If I take the pessimistic value of 15, I get

15^9 = 38443359375 nodes

At 200 000 000 nodes per second

38443359375 / 200 000 000 = 192 seconds

3 and a half minutes

--
GCP

Re: This is getting boring David Rasmussen 11:18:47 01/30/02
- Re: This is getting boring Robert Hyatt 20:23:34 01/30/02
  - Re: This is getting boring David Rasmussen 04:17:49 01/31/02
    - Re: This is getting boring Robert Hyatt 21:29:22 01/31/02
      - Re: This is getting boring David Rasmussen 03:38:57 02/01/02
Re: This is getting boring Vincent Diepeveen 08:04:18 01/30/02
- Re: This is getting boring Uri Blass 11:06:04 01/30/02
  - Re: This is getting boring Vincent Diepeveen 12:53:51 01/30/02
- Re: This is getting boring Gian-Carlo Pascutto 08:15:03 01/30/02
  - Re: This is getting boring David Rasmussen 11:20:36 01/30/02
    - Re: This is getting boring Vincent Diepeveen 12:57:04 01/30/02
      - Re: This is getting boring Albert Silver 14:09:12 01/30/02
  - Re: This is getting boring Miguel A. Ballicora 10:26:12 01/30/02
    - Re: This is getting boring David Rasmussen 11:28:38 01/30/02
  - Re: This is getting boring Vincent Diepeveen 08:23:41 01/30/02

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