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Subject: Symbolic: Micro status update 2005.06.28

Author: Steven Edwards

Date: 05:36:38 06/28/05


Symbolic: Micro status update 2005.06.28

Symbolic's ChessLisp source is now able to completely explore a multilevel
adversarial plan including subgoal elaboration at different ply depths and
plenty of narration. This means that the ExpPlan and ExpPlayMove sequencers are
successfully calling each other recursively to traverse the HTN (Hierarchical
Task Network) plan.  Some test results are linked at the updated web site:

  http://www.geocities.com/chessnotation

The latest run was made on a 1.13 GHz Pentium III running Linux.  The node
exploration rate was about seven per second.  I had hoped for a slightly faster
rate for this platform, but it's still acceptable.  The raw Lisp evaluation rate
is slightly over 300,000 symbols per second.

A big change from the earlier version is that each node in the position search
tree now retains the most recent analysis (score, PV, etc.) for that position.
Not only does this help with debugging, but more importantly it assists with
being able to suspend/resume the search at different points in the position
search tree.  This ability is needed to better mimic the human progressive
deepening process.



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