a strangely lost game #3 - plummeting evaluation

[caissist]

Hi Adam,
this time Patricia ver Aug 06, 2024 was playing!
It looks to me like both games are pretty similar in terms of engine behavior?!

• ver Aug 06, 2024
• ver Sep 18, 2024

If my impression is correct, then there is a serious problem...
Patricia game - lost game #03.txt
Patricia game - lost game - logging #03.txt

[Adam-Kulju]

The blunders/leaps in evaluation here are only a couple pawns at a time, which is much more in line with what low skill level Patricia should do than the first games - what settings were you running her with?

[caissist]

The blunders/leaps in evaluation here are only a couple pawns at a time, which is much more in line

So what do you think was happening here: was this game lost by Patricia based on its playing skills, or based on a bad opening line (book)?

Both versions Sep 18, 2024 and Aug 06, 2024 were/are playing with these settings: single threaded, hash 1024/2048 Mb,
MultiPV 1.
EDIT: UCI_LimitStrength false

By the way: what do you think is correct in single threaded mode - hash 512/1024/2048 ?

Thank you.

[Adam-Kulju]

very weird. The log has it performing multiPV searches:

19:41:16.022<-info multipv 1 depth 1 seldepth 1 score cp 77 nodes 30 nps 2500 time 12 pv e5e4 
19:41:16.023<-info multipv 2 depth 1 seldepth 1 score cp 52 nodes 64 nps 4923 time 13 pv e8g8 
19:41:16.023<-info multipv 3 depth 1 seldepth 1 score cp 48 nodes 96 nps 7384 time 13 pv d8e7 
19:41:16.024<-info multipv 4 depth 1 seldepth 1 score cp 38 nodes 126 nps 9692 time 13 pv a7a5 
19:41:16.024<-info multipv 5 depth 1 seldepth 1 score cp 35 nodes 155 nps 11923 time 13 pv h7h6 

but I can't replicate that behavior when I boot up Patricia and send in those commands myself. Was the Skill_Level or UCI_Elo option turned on or anything?

I'd use a hash of 512 mbs for single threaded play, maybe even lower depending on the time control. CCRL uses 256 mbs of hash for example.

[caissist]

Here a complete log file for a single game. You see all engine settings which are wanted so far.
And again the engine is performing multiPV searches?!
EDIT: and engine option MultiPV is set, too!?
Patricia game - engine settings - logging.txt

Was the Skill_Level or UCI_Elo option turned on

Please, what does that mean?? To my understanding Skill_Level and UCI_Elo options will be activated only if UCI_LimitStrength is set to true?! It's a simple connection that most people certainly understand.
And on Sep 28th, 2024 I called all the engine options I used, including "UCI_LimitStrength false"...

I'd use a hash of 512 mbs for single threaded play, maybe even lower depending on the time control.

Almost all time controls are Fisher clocks 5 1. Are 512 Mb correct?

[Adam-Kulju]

It's because you set the UCI_Elo option: UCI_Elo value 3000

…

On Sun, Sep 29, 2024 at 12:18 PM caissist ***@***.***> wrote: Here a complete log file for a single game. You see all engine settings which are wanted so far. And again the engine is performing multiPV searches?! Patricia game - engine settings - logging.txt <https://github.com/user-attachments/files/17180131/Patricia.game.-.engine.settings.-.logging.txt> I'd use a hash of 512 mbs for single threaded play, maybe even lower depending on the time control. Almost all time controls are Fisher clocks 5 1. Are 512 Mb correct? — Reply to this email directly, view it on GitHub <#98 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AUP3UBX7EV5DA2UXSOEUHQDZZAY7JAVCNFSM6AAAAABO7X4FYSVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDGOBRGQZTENRQHE> . You are receiving this because you commented.Message ID: ***@***.***>

[caissist]

It's because you set the UCI_Elo option:
UCI_Elo value 3000

Adam, that's way too short - not sure if I understood correctly. UCI_Elo value 3000 is a default engine option?!
But I set "setoption name UCI_LimitStrength value false" so UCI_Elo value 3000 should be correct.

[Adam-Kulju]

hi, sorry for the late reply.
if you set the UCI_Elo value or the Skill_Level value, the engine will treat it as if UCI_LimitStrength is true. I did it properly before but changed it because people kept trying to set the skill level using only UCI_Elo and wondering why it didn't.

[caissist]

Adam, again way too short. The Skill_Level and UCI_Elo options are defaulted to the highest level, and setting also UCI_LimitStrength value to false should do it without any doubt - namely playing on highest level, and nothing else?!

people kept trying to set the skill level using only UCI_Elo
That is the point - me, too! To my understanding there is a need for only 2 options:

1. UCI_LimitStrength. When set to "false" no need for anything else, all is already said. And only when setting to "true"
   then a 2nd option is necessary, namely:
2. Skill_Level or UCI_Elo - either or!

This is a simple logic everybody can understand...

[Adam-Kulju]

It's because you set the UCI_Elo option:
UCI_Elo value 3000

Adam, that's way too short - not sure if I understood correctly. UCI_Elo value 3000 is a default engine option?! But I set "setoption name UCI_LimitStrength value false" so UCI_Elo value 3000 should be correct.

By default it doesn't expect to be sent in any "setoption name UCI_Elo value x" commands. I will fix this for Patricia 4. (I have more bugs than I can shake a stick at it seems!)