stellar

0 # Stellar

1

2 UCI bitboard chess engine written in C++20

3

4

5 ## Description

6

7 The goal of the project is experimentation. I want to see how far I can push

8 the engine to play better while learning various techniques of optimization.

9

10 To see the games played or play a game on your own checkout the profile on

11 [lichess](https://lichess.org/@/StellarBOT), bullet, blitz and rapid challenges, ranked or casual, are accepted.

12

13 Check out the games carried out by [CCLR](http://computerchess.org.uk/ccrl/404/)

14 for up to date rating against other engines.

15

16

17 ## Getting Started

18

19 ### Dependencies

20

21 - Linux

22 * CMake 3.25.2 or latter

23 * Compiler with C++20 support (tested: clang 16.0.5, gcc 13.2.0)

24

25 - Windows

26 * Visual Studio (tested: Community 2022 17.9.2)

27

28

29 ### Installing

30

31 * Clone the repo

32 * Make a build folder and cd into it

33 * Run `cmake -DCMAKE_BUILD_TYPE=Release <path to cloned repo>`

34

35

36 ### Executing program

37

38 * Run the engine by running: `./bin/engine`

39

40 * The engine accepts commands on the standard input and produces results to the standard output

41 * To communicate with the engine use UCI command. Reference for UCI protocol can be found [here](http://download.shredderchess.com/div/uci.zip)

42

43

44 ## Help

45

46 * To see the options for additional tools run one of the following commands form the build directory:

47 ```

48 ./bin/perft -h

49 ```

50 * Changes to the move generation can be tested with `ctest` on a predefined set of positions

51

52

53 ## Version History

54

55 - 1.5

56 * Fix a few bugs

57

58 - 1.4

59 * Better time management

60 * Pawn hash table

61

62 - 1.3

63 * Build engine on Windows using Visual Studio

64 * Improve compilation time

65

66 - 1.2

67 * Improved evaluation using interpolation

68 * Incremental sorting

69 * Fix timeouts

70

71 - 1.1

72 * Add Arena

73

74 - 1.0

75 * Initial Release

76

77 ## License

78

79 This project is licensed under the MIT License - see the [LICENSE](LICENSE.md) file for details

80

81

82 ## Acknowledgments

83

84 Big thanks to [Gabor Szots](https://github.com/SzotsGabor) from CCRL testing

85 group, for taking an interest in this project by allowing Stellar to compete

86 with other engines.

87

88 Inspiration, code snippets, etc.

89 * [Chess Programming Wiki](https://www.chessprogramming.org/)

90 * [Code Monkey King](https://github.com/maksimKorzh)

91 * [Lichess-Bot](https://github.com/lichess-bot-devs/lichess-bot)

92