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XG Beta 2.00.168 Release - Improved speed.

Posted By: eXtreme Gammon
Date: Sunday, 12 June 2011, at 1:33 a.m.

The new version of the beta (2.00.168) is now available at www.extremegammon.com/beta2.asp

As always, thanks for the feedback and bug reports from all the beta testers.

This version fixed the last known bug but mainly introduced the new engine which is much faster (while being marginally weaker: -0.25 Elo , less than 0.01 PR).

The match analyze has been redesigned so it better uses all the processor's threads: on a core i7, a match analyzed at 3 ply is now 2.6x faster than the previous beta version (and 2.4 faster than version 1). Differences will be smaller on processor with less threads.

Rollouts are also significantly faster (1.60 to 1.80 faster than previous beta, and 1.30 to 1.40 than version 1).

Check the updated error level data at http://www.extremegammon.com/xg2level.asp

Here is the chart showing the strength vs speed of each level in version 2 (red) and version 1 (blue). For reference are also indicated GnuBG 2-ply (purple), Snowie (orange) and BgBlitz (Green)

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