Author: Tony Werten
Date: 01:05:08 10/29/01
Go up one level in this thread
On October 28, 2001 at 21:06:11, Robert Hyatt wrote: >On October 28, 2001 at 18:20:43, Bas Hamstra wrote: > >>Again many bizar events. While discussing how boring and anti-positional Tiger >>usually plays, with Jeroen Noomen, during the game Tao-CT, CT shot a h-pawn >>through Tao's left eye. End of discussion. Well, let's call the thing an >>idiot-savant, that's as far as I can go. Newcomer is EEC that does not use any >>form of AlphaBeta at all. The author tried to explain the concept to me, but I'm >>not sure I understand. Each move it plays a couple of shallow "matches" against >>itsself and some kind of pattern matching is involved. Eventually that leads to >>"votes" for different moves. The author says it has won some Blitz games against >>GNU. >> >>Also new is "Gadget" from Hans Zijdenbos, written in Basic. Since it is brand >>new, it has many things *not*. It has no hashtable, no pondering, no nullmove >>and believe it or not, no quiescence search. Very little evaluation. Now can >>that play chess? Amazingly, it does. Imagine Gadget searching 6-7 ply and Tao >>12-13 ply, basically twice as deep. Yet it kept Tao negative for over twenty >>moves, with sound play. Cock de Gorter said the same happened during >>Crafty-Gadget. You would almost expect non nullmovers find positional holes in >>the nullmove search or something. >> >>During a deep technical discussion with Johan de Koning whether to analyze mates >>and countermates in the evaluation function or not, Jeroen Noomen drops by: >>"aha, a rabbit". Apparently an enemy knight at h7, that can't move, is a rabbit. >>We didn't get it, what do rabbits usually do? We could think of two things: a) >>multiply and b) disappear in a hole. Since there were no minor promotions >>possible in the foreseeable future and the rabbit finally disappeared in h7 I >>wouldn't be surprised if b) has something to do with it. >> >>Well, Tao scored 3 out of 6 so far, on a PIII-500. Should have won against Ant, >>which was positionally manoevred into a corner quite nicely, but alas, fell into >>the "impotent pair" trap which I have no code for: bishop+unpromotable pawn, and >>it became a draw. >> >>Finally: what's the matter with Crafty? It has the fastest hardware of all, but >>seems to do relatively poorly, what's the matter? The new SE stuff, or what? >> >>TooTheLoo, >>Bas. > >1. Does Crafty _really_ have the fastest hardware there? That's hard to >believe with lots of 1.4 gig Dual AMD machines cheaply available. But in any >case, it is possible. A dual 1.4 is faster than a quad-700 for Crafty, however, >as the quad loses a bit more to overhead... Crafty doesn't have the fastest hardware but it's still quite fast. In the endgame Crafty - XiniX I was outsearching Crafty several times by 3 to 5 ply on a celeron 700 ! Unfortunately it wasn't enough to win, but it does seem to indicate something is wrong in Crafty's endgame. XiniX had no problem searching the same depth. Tony > >2. Crafty may well have a serious bug. Michel has reported that it will crash >on a deep think, which is odd. There is no SE code in it, but it is possible >that something in recent versions has left a bad array subscript or something. >I am trying to get it to repeat a crash, but so far, nothing... > >y
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.