Well, let's take a look (just for comparing) regarding Elo differences,
E.g g between original books vs my recent created derivatives ones..
1st of all, be aware that to expect identical performances is madness!
And due to not enough games: I merged many book vers. in one name..
(Sure here I am referring about my recent created Champ based books)
Moreover, all of them are not played under same test conditions...
As we know, any book performance depends on our used conditions,
But if nothing else..it seems that my based books are not too far
From the original ones, at least if comparing Elo differences, right ?
Besides, some my created based ones even may become stronger...
As main reason I do not allow/import the defeats (weakest) lines,
Sure here I refer about during each my derivatives book creations!
Number Ones CS 2018- 2022 (all are based/derivatives books):
https://sites.google.com/site/computers ... 35-stage-2
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Rank Name Elo + - games score oppo. draws
7 DON 21/22 3772 6 6 1188 51% 3764 91%
9 Zeus 2020 3770 6 6 1188 51% 3764 88%
18 MANTIS 21/22 3765 6 6 1188 50% 3765 88%
19 Cerebellum 2020 3764 6 6 1188 50% 3765 89%
32 Vitamin 2020 3750 6 6 1188 48% 3765 86%
34 GM Champions 3745 6 6 1188 47% 3765 86%
https://sites.google.com/site/computers ... -nnue-cs-x
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Rank Name Elo + - games score oppo. draws
26 DON-B 3749 3 3 2430 52% 3739 91%
44 Zeus 3746 5 6 1000 52% 3736 90%
48 MANTIS Upd 3746 5 5 1000 51% 3739 90%
69 Cerebellum 3M 3743 6 6 1000 51% 3739 92%
111 Vitamin 290320 3735 6 6 790 49% 3742 90%
142 GM Champions 3726 6 5 900 48% 3740 89%
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Rank Name Elo + - games score oppo. draws
1 Perfect 16 3790 10 11 650 56% 3749 72%
12 Rybka III 3737 11 11 650 48% 3753 82%
Note: For comparing is used close in date book players
And both participants played by same CPU: i7-920 @4.00GHz
https://sites.google.com/site/computers ... k-nn-cs-35
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Rank Name Elo + – games score oppo. draws
1 SedatChess, Rybka 3 3368 11 11 2727 69% 3243 45%
198 Rybka3.ctg, Rybka 3 3229 24 24 482 51% 3220 55%
Why is there much Elo influence/differences? for some reasons:
1st of all, Rybka3.ctg requires much more games (for accurate Elo),
You may know, 482 games (per player) is good data, but not enough!
As other very important influence (sure here I mean during past..):
Rybka III ctg book was publicly available in those times that means
Its mostly strong opening lines were blocked or became drawish,
Or even some after period of time, they are started to loosing..
Actually this is nothing new..this happens with every public book..
Where Perfect 16 was not public available, plus played with often
Updates, adding newer/stronger moves..even in those old times:
I still remember that I made move optimizations in every hour etc.
Sure not always (24/7) of course... ) but quite frequent for sure...
And that's why and as usually I say over Elo points differences:
Online Play is totally different than on same PC matches, e.g
Some online games are lost on time..some online players are
Lost due to wrong engine or hardware configurations or some
Pardon, even I say quite frequent some lost due to hardware
Speed disadvantage...and mainly for these kind of reasons,
Each online played opening line/game is requited/needed to be
Checked manually and carefully..via analyzing to find stronger
Move...Btw, a small important note more:
This is completely wrong, if checking only at engine outputs!
If still not so clear, Which chess engine says the true to us?
There are many positions, come such as advantage/disadvantage..
Where later White or Blacks are winning/ loosing..that's why,
Sure for better performances: it is required many test-replay...e.g
The same won games..to see this opening is really strong/weak..
Otherwise (without serious tests..) many players may suffer...sure
Here I refer for openings, which are played on same CPU as well
One thing more, unfortunately there is also cheating via Online..
At least on Lichess data: a lot of 'fake' high Elo numbers recorded,
Which gained vs same/several or vs much weaker players.. hehe ))
What a hero are these kind of guys...LOL..In other words,
Come to 'real' Arena (SCCT) and let's see how 'good' you are !)
And just in case, do not blame as engine error/s etc.. because
The 'real' Champions never complain...at least mostly of them..
As reason, these Top book authors are too busy on improving,
Working for over newer stronger ideas that never played before!
And I hope also that
All my produced data, experience etc. will be helpful...
Best Wishes,
Sedat