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Containment: Might 7-ply outperform XGR+?

Posted By: mtuhtan
Date: Saturday, 22 January 2011, at 11:00 p.m.

In Response To: Containment: Might 7-ply outperform XGR+? (Stick)

Even though I'm linguistically challenged I understood that you think a 7 ply analysis would be clearly stronger in most all situations compared to XGR+. XGR+ is a variance reduced truncated at 7 ply rollout. I forget how many trials, I seem to remember somewhere along the lines of 600(?) but I can't quickly find the information to quote it exactly. 7 ply is... well, 7 ply lol. I don't know how else to say it and I could be dead wrong but what you're saying seems wrong to me.

From http://www.extremegammon.com/Help.asp :

Q: What is XG Roller+?
A: XG Roller+ is the strongest level of play you can use in eXtreme Gammon, it does a short truncated rollout. It uses a 7-ply truncated rollout of 360 games using variance reduction, it uses 2-ply for all the cube decisions and for the 2 first checker plays. It uses 1-ply for all the other checker plays. The position at truncation point is evaluated in 2-ply.

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