Author: Eugene Nalimov
Date: 08:11:33 09/28/01
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There is no bug in TBSTAT, and statistics is correct. Eugene On September 28, 2001 at 08:27:37, Mike Hood wrote: >On September 19, 2001 at 04:23:39, Les Fernandez wrote: > >>Has anyone tabulated the total win-lose-draw-broken positions for first the 3 >>then 4 and then the 5 piece sets? I know that the information is available on >>Bobs ftp site but hoping that someone has already done it for both WTM and BTM >>so I dont have to do them one by one. >> >>ie: >> >>EGTB WINS LOSE DRAW BROKEN >> >> 3 >> 4 >> 5 > >This is theoretically possible, but not very sensible at the moment. Most of the >TBS files on Robert Hyatt's ftp server are defective, probably due to a bug in >TBSTAT. > >For instance: > >krrk.tbs -- On black's move there are 1032 positions that lose in 16, but on >white's move the longest mate is Mate in 7. > >kqrkr.tbs -- On black's move there are 60 moves that are Mate in 5, but there >are ZERO moves that are Mate in 4. > >kbpk.tbs -- On white's move there is 1 position that is Mate in 31, but there >are ZERO moves that are Mate in 30. > >In most of the TBS files the number of broken positions is not listed. > >Over 50% of the TBS files are obviously defective, and I can't vouch for the >validity of the others. And, to ask a naive question, shouldn't the number of >Mates/Losses/Draws in a pawnless tablebase always be divisible by 4? > >I've reported the bug to Eugene by email a few weeks ago, but it hasn't been >fixed yet. > >Mike > >**** Dansez de la apusul pana la rasaritul soarelui ****
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