Author: Otello Gnaramori
Date: 14:55:23 07/26/01
Go up one level in this thread
On July 26, 2001 at 17:37:02, Kevin Stafford wrote: > >>An engine that is twice as fast will find tactical shots in half the time. This >>is a *good* thing. >> >>But high NPS doesn't necessarily imply tactical speed, nor do low NPS >>necessarily imply more positional knowledge. >> >>If a program does expensive stuff in order to try to improve move ordering, >>nodes per second will decrease but the program will search faster. This has >>nothing to do with positional knowledge. >> >>Also, it's possible to add "knowledge" to an eval function that behaves like >>search. Here is an example: >> >>1) Program X searches 10 plies at a very high node rate, but doesn't see two-ply >>tactics in its eval function. >> >>2) Program Y searches 8 plies and can see two-ply tactics in its eval function. >>Its node rate is much lower because it is looking for two-ply tactics. >> >>Program Y is not smarter, it's just increasing its effective depth through eval. >> Sometimes it's possible to increase effective depth by a whole lot, and >>sometimes you can search 20 plies and have no effective depth, but a low >>node-rate program does not necessarily get more effective depth just because it >>runs at a low node rate. >> >>bruce > >The argument isn't really about node-rate in this case, but I can see the >confusion as that is the topic of the thread. I was coming back to an earlier >argument made by Otello that positional knowledge is effectively useless in >chess, because chess is all tactics. Not exactly all...but if I remember well the number was 99%. Regards. My point was that even the fastest engines >today (measured however you wish, depth, NPS, etc) have a good amount of >positional knowledge, and that positional considerations are hardly made >obsolete by gaining the ply or two over the competition you'll get by using a >quick (but less-intelligent) eval function. I hope that makes some sense. > >-Kevin
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.