Arasan 26.1

Discussion of anything and everything relating to chess playing software and machines.

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jdart
Posts: 4447
Joined: Fri Mar 10, 2006 5:23 am
Location: http://www.arasanchess.org

Arasan 26.1

Post by jdart »

Arasan 26.1 is available from https://arasanchess.org.

Changes in Arasan 26.1:
1) Changes to futility margin calculation
2) Rework history heuristic and history pruning, retune
3) Add some utility/tool programs: filter_pgn.py, bulletstats
4) LMR changes and tuning with Lakas
5) Fixes/enhancements to selfplay utility
6) Scale eval by material level
7) Stricter FEN parsing and error reporting
8) Retrain network with 3-tier learning/WDL schedule, as in Pawnocchio

Game test results against version 26.0:

Results of Arasan-Test vs Arasan-Base (180+1, 1t, 512MB, 8moves_v3.pgn):
Elo: 16.11 +/- 3.77, nElo: 53.25 +/- 12.43
LOS: 100.00 %, DrawRatio: 82.47 %, PairsRatio: 3.11
Games: 3000, Wins: 240, Losses: 101, Draws: 2659, Points: 1569.5 (52.32 %)
Ptnml(0-2): [2, 62, 1237, 193, 6], WL/DD Ratio: 0.03
Dann Corbit
Posts: 12897
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Arasan 26.1

Post by Dann Corbit »

Fantastic! Thanks Jon
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