Thanks David. That T-12 is very interesting. I see that the subsequent tables are based on an increasing cubeless win % by 1% per 50 rating points.
The Elo formula gives a higher win rate for a given rating (in a 1-point match) than the equivalent Jacobs Table. Table # Page Rating point difference Jacobs Table cpw Elo cpw T-13 32 0 (even) 50.0 50.0 T-15 34 100 52.0 52.9 T-17 36 200 54.0 55.7 T-19 38 300 56.0 58.6 I'll try to construct the xml files for the tables over the next few days. -- Ian From: [email protected] <[email protected]> Sent: 23 August 2022 17:33 To: Ian Shaw <[email protected]>; 'Øystein Schønning-Johansen' <[email protected]>; 'Ezequiel Galarce' <[email protected]>; 'bug-gnubg' <[email protected]> Subject: RE: GNU Backgammon Ian et al, I also included T-12 which gives the parameters for subsequent tables. Let me know if you want more. I'm also not sure how happy the list-serv is with 5MB of attachments. I can find other ways to send them if need be. Best, David From: Ian Shaw <[email protected]<mailto:[email protected]>> Sent: Tuesday, August 23, 2022 12:59 AM To: [email protected]<mailto:[email protected]>; 'Øystein Schønning-Johansen' <[email protected]<mailto:[email protected]>>; 'Ezequiel Galarce' <[email protected]<mailto:[email protected]>>; 'bug-gnubg' <[email protected]<mailto:[email protected]>> Subject: RE: GNU Backgammon Hi David, >From >https://bkgm.com/articles/Sengoku/GraphicalMatchEquity/FishEffects/index.html >I understand that these are the tables used for compiling the METs. Since we have a jac50, I assume that one would be T-14. If you could send a picture of T-17 and T-19, that would be great. Table # Page Rating point difference T-13 32 0 (even) T-15 34 100 T-17 36 200 T-19 38 300 Thanks, Ian Shaw From: [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>> Sent: 23 August 2022 00:29 To: Ian Shaw <[email protected]<mailto:[email protected]>>; 'Øystein Schønning-Johansen' <[email protected]<mailto:[email protected]>>; 'Ezequiel Galarce' <[email protected]<mailto:[email protected]>>; 'bug-gnubg' <[email protected]<mailto:[email protected]>> Subject: RE: GNU Backgammon I have a copy of the book. There are more than 60 tables in it, but if anyone knows which one(s) you're looking for, I'm happy to send along photos. Best, David Levy From: Bug-gnubg <[email protected]<mailto:[email protected]>> On Behalf Of Ian Shaw Sent: Monday, August 22, 2022 1:34 PM To: Øystein Schønning-Johansen <[email protected]<mailto:[email protected]>>; Ezequiel Galarce <[email protected]<mailto:[email protected]>>; bug-gnubg <[email protected]<mailto:[email protected]>> Subject: Re: GNU Backgammon There was a table in the book. Tom Keith refers to it in one of his articles on bkgm.com. If I can resurrect an old hard drive, I'll have a look. It ought to be possible to generate fish tables from first principles, assuming a win rate and gammon rate per player. I think Jacobs used 24% gammon rate, which is higher than most. Regards, Ian Shaw ________________________________ From: Bug-gnubg <bug-gnubg-bounces+ian.shaw=riverauto.co.uk@gnuorg<mailto:[email protected]>> on behalf of Øystein Schønning-Johansen <[email protected]<mailto:[email protected]>> Sent: Monday, August 22, 2022 5:08:30 PM To: Ezequiel Galarce <[email protected]<mailto:[email protected]>>; bug-gnubg <[email protected]<mailto:[email protected]>> Subject: Re: GNU Backgammon Hmmm.... If my archive remembers correctly there never was a jac200 table. I don't have a copy of "Can a Fish Taste Twice as Good?", is it even a table in that book? I find no file called jac200.xml in the CVS attic either. So if there was a file called jac200,xml it must have been a local contribution that never was checked in. The guy who contributed this was named Craig Campbell. (Must be 20 years ago or so) Is it possible to get hold of him? -Øystein man. 22. aug. 2022 kl. 17:27 skrev Ezequiel Galarce <[email protected]<mailto:[email protected]>>: I don't know, I'm asking the creator of the equity table, maybe he has it El lun., 22 ago. 2022 16:06, Ian Shaw <[email protected]<mailto:[email protected]>> escribió: H Ezequiel, Now that you mention it, I think you're right. I wonder why it's been omitted from the installation. Does anyone here have a copy of the jac200 MET? -- Ian From: Ezequiel Galarce <[email protected]<mailto:[email protected]>> Sent: 22 August 2022 15:01 To: Ian Shaw <[email protected]<mailto:[email protected]>> Subject: Re: GNU Backgammon Hello, I have contacted the creator of "jac050" and "jac100" and he told me that he thinks he remembers that he had made a "jac200", I don't have any data. El lun., 22 ago. 2022 12:51, Ian Shaw <[email protected]<mailto:[email protected]>> escribió: Hi Ezequiel, I don't think the jac200 table is available on line. If you have the raw data, it's easy to make a MET that gnubg can use. I could create one if you can find the data Regards, Ian From: Ezequiel Galarce <[email protected]<mailto:[email protected]>> Sent: 19 August 2022 22:19 To: Ian Shaw <[email protected]<mailto:[email protected]>> Subject: Re: GNU Backgammon Hello good evening, can you get the equity table "jac200.xml"? El vie., 19 ago. 2022 14:54, Ian Shaw <[email protected]<mailto:[email protected]>> escribió:
