Shallow Blue
(not Deep Blue)
A UCI chess engine written in C++11
Features
- Board representation
- Move generation
- Search
- Evaluation
- Move ordering
- Other
- Zobrist hashing / Transposition table
- Opening book support (PolyGlot format)
Building
To build on *nix:
make
You can build with debugging symbols and no optimizations using:
make debug
If you have Mingw-w64 installed, you can cross compile for Windows on Linux with:
./build_windows.sh
Tests
Catch unit tests are located in the test directory.
To build and run the unit tests, use:
make test
./shallowbluetest
To build and run the unit tests, skipping perft tests (these take a while to run), use:
make test
./shallowbluetest exclude:[perft]
Documentation
Shallow Blue's code is extensively documented with Doxygen.
To generate HTML documentation use:
doxygen
Opening Books
Shallow Blue supports PolyGlot formatted (.bin) opening books. To use an opening book, the OwnBook
and BookPath UCI options must be set to true and the path to the opening book file respectively.
These options can be set from your chess GUI or the UCI interface as follows:
setoption name OwnBook value true
setoption name BookPath value /path/to/book.bin
Implemented non UCI Commands
These commands can be useful for debugging.
perft <depth>- Prints the perft value for each move on the current board to the specified depth
printboard- Pretty prints the current state of the game board
printmoves- Prints all legal moves for the currently active player
Future Improvements
- Staged move generation
- Null move pruning
- Late move reductions
License
MIT © Rhys Rustad-Elliott