Re: CGOS source on github

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Hi David,

You are right that non-determinism and bot blind spots are a source of
problems with Elo ratings. I add randomness to the openings, but it is
still difficult to avoid repeating some patterns. I have just noticed that
the two wins of CrazyStone-81-15po against LZ_286_e6e2_p400 were caused by
very similar ladders in the opening:
http://www.yss-aya.com/cgos/viewer.cgi?19x19/SGF/2021/01/21/733333.sgf
http://www.yss-aya.com/cgos/viewer.cgi?19x19/SGF/2021/01/21/733301.sgf
Such a huge blind spot in such a strong engine is likely to cause rating
compression.

R=C3=A9mi

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<div dir=3D"ltr"><div>Hi David,</div><div><br></div><div>You are right that=
 non-determinism and bot blind spots are a source of problems with Elo rati=
ngs. I add randomness to the openings, but it is still difficult to avoid r=
epeating some patterns. I have just noticed that the two wins of CrazyStone=
-81-15po against=20
LZ_286_e6e2_p400 were caused by very similar ladders in the opening:</div><=
div><a href=3D"http://www.yss-aya.com/cgos/viewer.cgi?19x19/SGF/2021/01/21/=
733333.sgf">http://www.yss-aya.com/cgos/viewer.cgi?19x19/SGF/2021/01/21/733=
333.sgf</a></div><div><a href=3D"http://www.yss-aya.com/cgos/viewer.cgi?19x=
19/SGF/2021/01/21/733301.sgf">http://www.yss-aya.com/cgos/viewer.cgi?19x19/=
SGF/2021/01/21/733301.sgf</a></div><div>Such a huge blind spot in such a st=
rong engine is likely to cause rating compression.</div><div><br></div><div=
>R=C3=A9mi<br></div><div></div></div>

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