Arasan 11.7

[jdart]

Arasan 11.7 is available from http://www.arasanchess.org.

This is primarily a bug fix release. I don't expect much if any difference in playing strength vs. version 11.6.

Changes in Arasan 11.7 (Feb. 2010):

1) Fix in PGN parser for rare cases where moves need rank + file for
disambiguation.
2) Changes to LMR and other pruning logic.
3) Fix time measurement bug in Linux version.
4) Fix thread deadlock problems on Linux.
5) Convert to POSIX unnamed semaphores for Linux, to ensure semaphore cleanup on program exit.
6) Multiple other code fixes and warning removals for Linux/Mac compiles.
7) Bug fix in Board::wouldCheck.
8) Increased scores for bishop pair, Rook on 7th
9) Fix UCI mate score output.
10) Fix crash bug in UCI mode on Vista, Windows 7

[swami]

Thanks, Jon.

Arasan 11.7
by Jon Dart, USA.

Strategic Test Suite Conditions:

Core2Quad 32 bits, Q6600, 2 GB RAM, 2.4GHZ
10 seconds per position
900 positions
Engine uses 132 Mb Hash.
Single CPU
Arena GUI


Overall Performance:

• Total Score: 539/900 [.....] Average : 59.88% [.....] Grade: B [.....] Total Rated Time: 69.27/150 minutes [4156 Seconds/9000 Seconds]= 0.4617

Subject-wise Scores:

STS (v1.0) - Undermining:
67/100, Grade: B+

STS (v2.1) - Open Files and Diagonals:
58/100, Grade: C+

STS (v3.0) - Knight Outposts/Centralization/Repositioning:
61/100, Grade: B

STS (v4.1) - Square Vacancy:
73/100, Grade: A-

STS (v5.0) - Bishop vs Knight:
69/100, Grade: B+

STS (v6.0) - Re-Capturing:
61/100, Grade: B

STS (v7.0) - Offer of Simplification:
56/100, Grade: C+

STS (v8.1) - Advancement of f/g/h Pawns:
44 /100, Grade: E

STS (v9.0) - Advancement of a/b/c Pawns:
50/100, Grade: C

Best Wishes,
Swami