Arasan 11.4

[jdart]

Arasan 11.4 is available from http://www.arasanchess.org.

Changes in Arasan 11.4:
1) Fix to KBP draw code.
2) Fix Winboard/xboard driver to send "O-O" not "o-o" for castling.
3) Fix time calculation in tournament mode.
4) Scoring changes, fixes for Rook mobility & rooks on open files.
5) Scoring change in king safety: don't count Bishops more highly
than Knights in evaluating king attacks.
6) The usual book fixes/additions.

I have also updated the Arasan test suite with 15 additional positions. Details at http://www.arasanchess.org/testsuite.shtml.

--Jon

[Dr.Wael Deeb]

Thanks Jon
Will be tested regards,
Dr.D

[Graham Banks]

Thanks Jon.

[jpqy]

First little problem i see is when i select 4threads i get only 75%cpu load on my core i7 920...

JP.

[Dr.Wael Deeb]

Arasan 11.4 is available from http://www.arasanchess.org.

Changes in Arasan 11.4:
1) Fix to KBP draw code.
2) Fix Winboard/xboard driver to send "O-O" not "o-o" for castling.
3) Fix time calculation in tournament mode.
4) Scoring changes, fixes for Rook mobility & rooks on open files.
5) Scoring change in king safety: don't count Bishops more highly
than Knights in evaluating king attacks.
6) The usual book fixes/additions.

I have also updated the Arasan test suite with 15 additional positions. Details at http://www.arasanchess.org/testsuite.shtml.

--Jon

Many thanks, Jon. Let me add, I appreciate particularly your non-fading enthusiasm in developing your engine. Arasan is now one of the all-time greats.

I strongly second that....Arasan is indeed a living legend and it's getting much stronger with every release....
Dr.D

[jdart]

The way the multi-threading is implemented some threads will occasionally be idle. But I typically see over 350% CPU on a 4 core machine.

Increasing this is on the to-do list.

[Peter Skinner]

Thanks Jon.