Arasan 17.5
Posted: Sat Jan 24, 2015 6:48 pm
Arasan 17.5 is available from http://www.arasanchess.org.
Changes in Arasan 17.5:
1) Modify and tune connected passer scoring.
2) Fixes to book weight computation.
3) Adjust queen mobility scoring.
4) Fix slow unload under Windows.
5) Add endgame mobility scoring for king (+3 ELO).
6) Fix asymmetry in Knight outpost scores.
7) More accurate eval of reduced-material endgames. Fix scoring for
pawnless Q vs RN.
8) Changes to time management. Extend time if failing low at end of search,
but only long enough to resolve the fail-low. In addition, though: extend
if score is dropping relative to last search - amt of extension now varies
with how much score has dropped.
9) Increase king position scores when opponent has very low material.
10) Some tuning of scoring for blocked passed pawns. A penalty is given now
if the pawn is blocked but not at the immediate square in front.
11) Some fixes for Intel C++ (icc) compilation.
In additional as usual there is an updated opening book.
My tests show about +30 ELO at blitz vs. version 17.4 (on a rating scale where 17.4 is 2379).
--Jon
Changes in Arasan 17.5:
1) Modify and tune connected passer scoring.
2) Fixes to book weight computation.
3) Adjust queen mobility scoring.
4) Fix slow unload under Windows.
5) Add endgame mobility scoring for king (+3 ELO).
6) Fix asymmetry in Knight outpost scores.
7) More accurate eval of reduced-material endgames. Fix scoring for
pawnless Q vs RN.
8) Changes to time management. Extend time if failing low at end of search,
but only long enough to resolve the fail-low. In addition, though: extend
if score is dropping relative to last search - amt of extension now varies
with how much score has dropped.
9) Increase king position scores when opponent has very low material.
10) Some tuning of scoring for blocked passed pawns. A penalty is given now
if the pawn is blocked but not at the immediate square in front.
11) Some fixes for Intel C++ (icc) compilation.
In additional as usual there is an updated opening book.
My tests show about +30 ELO at blitz vs. version 17.4 (on a rating scale where 17.4 is 2379).
--Jon
