Mit folgenden Verbesserungen:
Version 0.93 of Ceres is published on github. Abbreviated release notes:
```
Update with improvements primarily related to speed and usability for games played at medium to long time controls:
* the speed of tree rebuilding between moves is significantly improved (up to 40% for very large search trees),
thereby increasing effective nodes per second (by about 5% at long time controls)
* a new UCI option MaxTreeNodes is added to limit search trees to a specified maximum size
* additional performance optimizations improve search speed by about 2%
```
As noted in announcements, the just-released Ceres 0.93 is mostly expected to improve match play at medium to long time control (15 minutes per game or over). However tests at short time control more positive than I would have expected. There seems a possibility that the correction of a race-condition related bug may have also contributed to some measurable improvement. Here are the results from all of the regression tests which I've run over the last couple of days:
```
Regression tests, Ceres version 0.93
Platform Net Sec/gm Opponent Elo Diff
-------------- ------ ------- ------------- --------
Linux T60 30 Ceres 0.91 14 +/-13
Linux T60 60 Ceres 0.91 2 +/-13
Linux T60 90 Ceres 0.91 7 +/-12
Windows T75 10 Ceres 0.91 27 +/-16
Windows T70 45 Ceres 0.91 14 +/-13
Windows T60 30 LC0 0.28rc1 31 +/-16
Windows T70 45 LC0 0.28rc1 22 +/-15
Windows T60 150 LC0 0.28rc1 29 +/-12
```
https://github.com/dje-dev/Ceres/releasesLothar