Author: Dan Kiski
Date: 06:13:52 12/30/98
Go up one level in this thread
On December 30, 1998 at 07:25:29, Thom Perry wrote: >On December 30, 1998 at 05:38:41, greg moller wrote: > >>On December 30, 1998 at 03:39:09, Komputer Korner wrote: >> >>>On December 29, 1998 at 16:20:06, Dan Kiski wrote: >>> >>>>The following game is from Fritz 5.16 v MCP8 >>>> >>>>Fritz 5.16 white >>>>MCP8 black >>>> >>>>1. NF3......NF6 >>>>2. D4.......E6 >>>>3. C4.......B6 >>>>4. NC3......BB7 >>>>5. A3.......D5 >>>>6. CD.......ED >>>>7. QA4 +....C6 >>>>8. G3.......NBD7 >>>>9. BG2......BD6 >>>>10. 0-0......0-0 >>>>11. BF4......QE7 >>>>12. BXD6.....QXD6 >>>>13. RFD1.....RFD8 >>>>14. E3.......A5 >>>>15. RAE1.....BA6 >>>> >>>>Fritz is now out of book but chooses NH4, MCP8 is still in book expecting QB3. >>>> >>>>Now the postion after 16. NH4 i have played through countless times at varying >>>>time controls yet MCP8 seems to always choose 16.......NG4. >>>> >>>>It has lost from this position over and over but always chooses 16.....NG4 and >>>>after Fritz's 17. E4 replys with 17......QF6 it might from this point try to >>>>change the odd move yet according to Fritz it was already way in front, can >>>>someone explain how this book learning works and how many losses will it take >>>>before the computer in this case MCP8 varies it's responce, in this case most >>>>likely remove 16........NG4 since this seems to be the start of its problems. >>>>At one point it added 16......NG4 to book after 6 straight losses using it. >>>> >>>>I wait until it is 7 points behind claim the win and then scroll back. Play 16. >>>>NH4 then carry on again. Am I doing something wrong with this method. >>> >>>Maybe MCP8 doesn't learn if you claim a win. >>>-- >>>Komputer korner >> >>Well, it would be interesting to test this hypothesis, since somehow i always >>had the impression that the older MCP7 was adding book moves in the lines it was >>LOSING with (!) At this point in time I'm suspicious about this whole learning >>algorithm. How exactly does it work, and can it be verified ? >> >>Regards, greg > >I too have been wondering about the learning feature in MCP8. I remember back >in MCP4/5 that once you analyzed a position/game, if you wanted to repeat the >original results, it was necessary to turn off the learning features. >Otherwise, the second time around, the evaluation score(s) and response time(s) >(time it takes for the program to make a move) were usually slightly different. >I attributed this to the learning features. However, with MCP8, I have played >several positions where the evaluation score changes drastically (downward) >after MCP8 has selected a move, yet MCP8 will continue to make the same move, >over and over. This doesn't look like learning to me. I have no doubt that I do have it set correctly I have been through the manual countless times, my only doubt was when I claim the win when 7 pts in front then scroll back if it accepts that and learns from it, from what I have seen is it accepts it since as stated at one point it added 16. NH4.....NG4 to book, yet don't learn from it. Maybe 16.....NG4 is ok maybe the problem is with 17........QF6 in reply to 17. E5. Yet as of yet I haven't been able to get it to make another move at time controls of up to 3 min\move it just keeps walking into losses even with Fritz 5.16 set at 10 secs\move from this position.
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