Chess engine: Eubos 2.25 (java engine)

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=2478

v.2.25

Primarily, reworked the use of the hash table in quiescent search. This has yielded a significant Elo improvement. Eubos is now stronger than Dragon 4.6. Latest result on release binary was a 50.7% win rate over 22,500 games.

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 - Rating CEDR progres

Pl	Engine	Rating	Score	Games	%
1403	Eubos 2.21	2478.8	79.00	269	29.37
1406	Eubos 2.20	2473.7	4.00	38	10.53
1413	Eubos 2.23	2459.1	69.00	327	21.10
1451	Eubos 2.22	2403.5	41.50	138	30.07
1458	Eubos 2.16	2391.7	34.00	100	34.00
1466	Eubos 2.14	2386.2	17.50	82	21.34
1485	Eubos 2.15	2360.0	49.50	154	32.14
1503	Eubos 2.17	2319.9	20.50	140	14.64
1551	Eubos 2.19	2239.5	6.00	28	21.43
1562	Eubos 2.12	2225.2	13.00	83	15.66
1586	Eubos 2.10	2168.1	6.00	30	20.00
1717	Eubos 2.3	1848.3	5.50	62	8.87
1750	Eubos 1.0.8	1681.9	9.00	42	21.43

Eubos 2.25 download