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Chess engine: Raven 1.20 (Windows and Linux)

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Raven is a chess engine written in C that uses the UCI protocol.
Rating JCER=2705,  Author: Steve Griffin

New Features

Search:
Don't use TT hits at low plies, allow mate scores in TT entries.
Don't use TT hits in PV nodes.
Fix bug with setting TT entry flags.
Sort root moves by nodes searched under that move in previous iterations.
Increase history margin threshold for PV moves.
Don't futility prune when beta is close to mate score.
Sort countermove above history moves.
Return -MATE_SCORE + ply instead of just -MATE_SCORE for better mate detection.
Removed some modifications to LMR.

Eval:
Removed bonus for queens on 7th rank.
Change unsafe squares multiplier from 2 to 1.5 in mobility.
Removed bonus for pieces on opponent's home row in mobility.

Time management:
No longer break early from a search based on time remaining.
I have also fixed a rare disconnection bug.
Raven 1.20 download

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