Chess engine: Eubos 2.9

Eubos - a basic Java chess engine, written for kicks. Uses jcpi for the UCI protocol parts. Kind of weak, doesn't evaluate for king safety, for example. Now uses transpostion hashing, but because it runs in the Java VM on a bog standard PC, doesn't search very deeply (around 100K Nodes/s, though this is actually quite hard to evaluate due to the hashing). 

Author: Chris Bolt Rating CEDR=2072

v.2.9

Features

This is the first Eubos release which incorporates a selective search. All previous releases have been Shannon type-A searches, only utilising Beta pruning

Added Late Move Reductions to the PlySearcher

After the first 6 moves at any ply deeper than 3, the search depth can be reduced by depth/4

There are the usual exemptions

Tuning / Optimisation / Tweaks

DrawChecker is now expanded as the game progresses

Fixes

Bug fixed where, if the game length exceeded 150 moves, the DrawChecker would cause a crash

To install Eubos as an engine in Arena:
1. Select Engines > Install New Engine
2. In the file browser dialog that appears, change the drop down to *.bat
3. Navigate to the Eubos binary location, select the Eubos.bat
4. Select UCI protocol to communicate with Eubos
5. That's it! 

Eubos 2.9 download