README

0. License
==========

SPSA Tuner is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

SPSA Tuner is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

1. Introduction to SPSA
========================

Please see the following for the implementation of SPSA.
https://github.com/zamar/spsa


2. Modifications of SPSA
========================

- comparison between test, plus and minus instead between plus and minus
- introduction of an objective (cost) function: 1 / (1 + 10 ** (d / 400)) where d is difference in result between master and test
- making a and c parameters dependent on cost

3. Configuration file
=====================

psqt.var contains all parameters from stockfish piece-square tables