mirror of https://github.com/tiyn/yeschess
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
49 lines
1.7 KiB
49 lines
1.7 KiB
# ychess
|
|
|
|
|
|
|
|
ychess is a chess implementation and engine written in nim.
|
|
|
|
## Usage
|
|
|
|
To play chess in the commandline simply download the code and run `nim c -r game.nim`.
|
|
You can either play the 1v1 hotseat mode or a single player mode vs the engine.
|
|
|
|
### Lichess
|
|
|
|
ychess uses the lichess api with the python plugin [berserk](https://github.com/rhgrant10/berserk).
|
|
An instance of the engine occasionally plays on [lichess](https://lichess.org/@/tiyn-ychess).
|
|
To get into the whitelist just write a ingame message to the account.
|
|
|
|
## Testing
|
|
|
|
Testing is done by `einheit` by [jyapayne](https://github.com/jyapayne/einheit).
|
|
All legal chess moves are implemented in `chess.nim` and tested by the TestSuite
|
|
in `test.nim`.
|
|
You can simply run the tests with `nim c -r test.nim`.
|
|
|
|
## Documentation
|
|
|
|
Documentation is written into the code via DocGen.
|
|
For this reason it is not saved in this repository.
|
|
To extract it into html run `nim doc --project --index:on --outdir:htmldocs game.nim`
|
|
|
|
### Moves
|
|
|
|
Moves are read from the commandline as [pure coordinate notation](https://www.chessprogramming.org/Algebraic_Chess_Notation#Pure_coordinate_notation).
|
|
The inner program will convert this notation to a move-tuple.
|
|
|
|
### Board Representation
|
|
|
|
Due to easier off the board checking a
|
|
[10x12](https://www.chessprogramming.org/10x12_Board) board is used.
|
|
|
|
### Engine
|
|
|
|
The engine uses a simple implementation of the
|
|
[NegaMax](https://www.chessprogramming.org/NegaMax)-algorithm with
|
|
[Alpha-Beta-Pruning](https://www.chessprogramming.org/Alpha-Beta#Negamax_Framework).
|
|
For the evaluation function each piece has a corresponding value.
|
|
Additionally there are [piece-square tables](https://www.chessprogramming.org/Piece-Square_Tables)
|
|
to encurage putting pieces on active squares.
|