buggnubg - Bugs: bug #64173, pruning levels unaffected when I...


bug #64173: pruning levels unaffected when I turn off pruning.

Submitter:  None
Submitted:  Tue 09 May 2023 07:09:20 PM UTC
Originator Name:  Bruce Cumming Originator Email:  * -email is unavailable-
Item Group:  Other bug Category:  Evaluations
Release:  * 1.05 Privacy:  Public
Operating System:  Mac OS X 10.x Severity:  3 - Normal
Open/Closed:  Open Assigned to:  None
Priority:  5 - Normal Status:  None
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Tue 09 May 2023 07:09:20 PM UTC, original submission:  

It is quite common for the cubeful equity describing the move made on move n to be different from the cubeful equity given by the cube analysis at the start of move n+1.  On rare occasions the discrepancy can be large (>0.25).  The discrepancies are associated with different pruning. I have the analysis level set to 4-ply, and the cube decision always reports the 4-ply numbers.  But the checker play often prunes to less than 4-ply.   
When I go to the advanced settings and turn off "use neural net pruning" for both cube decisions and checker play, the actual pruning reported for these decisions does not change.   Does this mean that pruning is still used, but using a different method than the neural net?   Or I have misunderstood what these checkboxes mean? Or is the request failing to register?

The attached game shows an example at Blacks move 15.  The equities for the moves are all pruned to 0-ply, even if "neural net pruning" is turned off in advanced settings (and clear and re-analyse the move).

(BTW, despite this minor issue, gnubg is a wonderful tool that I love!)



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Attach Files:

Attached Files
file #54715:  Game@Dec@20@2022.sgf added by None (4KiB - application/octet-stream - See Black's move number 15)


Depends on the following items: None found

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  • -email is unavailable- added by None (Submitted the item)

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    Follows 1 latest change.

    Date Changed by Updated Field Previous Value => Replaced by
    2023-05-09 None Attached File- Added Game@Dec@20@2022.sgf, #54715

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