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New chess engine: Amelia 0.12



Chess engine: Amelia 
Author: Joey Bednar

Name change and search/hashing improvements.
Changed name to Amelia and added styling to README.md
Added principal variation search
Added castling permissions and en passant square to Zobrist hash
If only 1 legal move, plays move instantly
Added simple testing bash script
Fixed bug in transposition table replacement
v0.12 vs v0.11: 1372 wins, 860 draws, 1159 losses (0.531)
Elo increase: 22.3 +/- 10.0



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