Chess Engines Diary

AspireBot - UCI chess engine Author: AspiringPenguin AspireBot v2 what's new? Changelog: Fixed repetition draw detection in some cases Improved UCI output Added depth extension for checks, improving search for mates Improved eval, with PESTO tables, a control metric and passed pawn detection Improved the use of interrupted search data Improved the book and book generator Started improving code readability around move generation Fixed a bug with checkmate involving pawns and board edges Updated the hash table to use an arbitrary amount of memory rather than just powers of 2. Added parameters to disable the built-in book and modifiy the hash size AspireBot v2 download

AspireBot - UCI chess engine Author: AspiringPenguin First release. Features: Move gen with PEXT and PDEP magic bitboards MVV-LVA and transposition table move ordering Tapered eval with material and piece-square tables Built-in book from ~1M high rated Lichess games ELO is around 1590 on the CCRL 2+1 scale. I believe the engine may be stronger than this in some stages of the game, but it seems to struggle a lot with some endgames, especially at short time controls. AspireBot v1 download