/scalachess

Chess API written in scala. Immutable and free of side effects.

Primary LanguageScalaMIT LicenseMIT

Chess API written in scala for lichess.org Build Status

It is entirely functional, immutable, and free of side effects.

INSTALL

Clone scalachess

git clone git://github.com/ornicar/scalachess

Get latest sbt on http://www.scala-sbt.org/download.html

Start sbt in scalachess directory

sbt

In the sbt shell, to compile scalachess, run

compile

To run the tests (with coverage):

clean coverage test
coverageReport

Code formatting

This repository uses scalafmt.

Please install it for your code editor if you're going to contribute to this project.

If you don't install it, please run scalafmtAll in the sbt console before committing.

Extensions

Create a similar function to this moves function called reinforcementMoves (it shows pieces that are able to move to a particular square on the same team as the piece owner): https://github.com/7hoenix/scalachess/blob/master/src/main/scala/Actor.scala#L15

Considerations:

  • Square ownership matters. E.g. if a monarch is involved then they are only able to reinforce a square that they have ownership of.
  • Pawns reinforce only via attacking (diagonals). Although they are able to move to squares which does remove square ownership for open diagonals, ranks, and files that they are now blocking. And also implies gaining square ownership, so if a pawn moves to the square first then that should also be considered when calculating reinforcementMoves. -> Use ! symbol in UI to represent this warning graphicaly.