Chess engine: Rengar 1.3.0

Rengar - chess engine with a simple evaluation function written in C++.

Rating CEDR=2657

Rengar - Rating CEDR progres

Pl	Engine	Rating	Score	Game	%
1283	Rengar 1.2.0	2657.0	21.00	104	20.19
1318	Rengar 1.0.2	2609.8	33.00	86	38.37
1365	Rengar 1.1.0	2524.9	18.50	118	15.68

v.1.3.0:

This release is expected to be a significant improvement over 1.2, perhaps enough to win CCRL's 104th Amateur D9. The main driver of the elo gain is the addition of dynamic move ordering.

We also expect smaller elo gain from small changes: minor evaluation enhancements, modification of the move order heuristics, prioritizing exploitation more in search, which wouldn't have passed without the move order change), and introducing aspiration windows. There are also some fixes related to the way Rengar handles draw scores in the transposition table and stops the search when finding a mate. Move generation is also slightly more performant now that the move queue avoids heap allocation, which also enabled dynamic move order). Rengar will now flush the buffer after each log statement for a better viewing experience. Finally, the hashbits option is now deprecated, as the hash option is more in line with the behavior of other engines.

Rengar 1.3.0 download