BitboardChess

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Bitboard-Chess,

a WinBoard compliant, didactic open source chess program by Bill Jordan, written in C++ and licensed under the GPL version 3, available on GitHub [1] - an ebook explaining the program is available from Amazon [2]. Bitboard-Chess is designed to show how a chess engine might work, quite similar to Bills Bare Bones Chess aka Basic-Chess, but using bitboards. Bitboard serialization is done via Matt Taylor’s folded BitScan [3], but move generation of sliding pieces is done in mailbox manner iterating over ray directions and pre-calculated target squares, radiating from the piece origin along with end of ray and blocker conditions [4].

Features#

[5]

Board Representation

• Bitboards
• 8x8 Board

Search

• Iterative Deepening
• Alpha-Beta
• Transposition Table
• Move Ordering
  • Hash Move
  • MVV-LVA
  • History Heuristic
• Extensions
• Reductions
• Quiescence Search

Evaluation

• Material
• Piece-Square Tables
• Open Files
• Pawn Structure
• King Safety

See also#

• Awesome
• Bills Bare Bones Chess
• JavaScript-Chess

Publication#

• Bill Jordan (2020). How to Write a Bitboard Chess Engine. amazon

External Links#

• GitHub - billjordanchess/Bitboard-Chess: Simple C++ chess playing program which uses bitboards

References#

1. ↑ GitHub - billjordanchess/Bitboard-Chess: Simple C++ chess playing program which uses bitboards
2. ↑ Bill Jordan (2020). How to Write a Bitboard Chess Engine. amazon
3. ↑ Bitboard-Chess/bitboard.cpp at master · billjordanchess/Bitboard-Chess · GitHub
4. ↑ Bitboard-Chess/gen.cpp at master · billjordanchess/Bitboard-Chess · GitHub
5. ↑ Bitboard-Chess/README.md at master · billjordanchess/Bitboard-Chess · GitHub

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