June 8, 2009

I've had less time to work on Arasan lately but have fixed a few bugs, including a time management problem with long time control games. Recently I made some scoring fixes for Rooks. There were actually several problems: one was that double Rooks on a closed file were receiving a bonus, also the way mobility was scored, it tended to advance Rooks in the middlegame so they had greater mobility across the rank - sometimes that's good, but probably not in general.

I also keep fixing the opening book.

I plan an 11.4 release fairly soon with these changes, but don't expect a dramatic change in overall playing style or strength.

Longer term plans include improving performance on multiple- core machines.