hofiisek / Chezz

Implementation of chess in Kotlin, as a temporary fix of the lockdown boredom.. and, of course, to practice some Kotlin :)

Chezz

Full-featured chess written in Kotlin.

Using TornadoFx (https://tornadofx.io/) for GUI, kotest (https://github.com/kotest/kotest) for unit testing, ktlint (https://github.com/pinterest/ktlint) for code style, and detekt (https://github.com/detekt/detekt) for code analysis.

Why?

• mainly to get familiar with Kotlin and to see its power
• also, lockdown boredom has been going on for too long already

How to run it?

• the simplest way is to open the project in IntelliJ IDEA and run ChezzApp.kt

Features

• valid movement of pieces (incl. en passant, castling, and promotion)
• check, checkmate, stalemate
• undo last move
• import/export from/to the standard Portable Game Notation (PGN) format

Features/ideas to implement

• minimax/alpha-beta prunning AI
• timer
• GUI improvements/extensions
  • showing taken pieces
  • showing PGN of current game state
  • allow to enable/disable highlighting of allowed moves and check

TODO list

• definitely a better test coverage (using deterministic tests rather than non-deterministic)
• configure detekt appropriately or fix the debt
• fix GUI
  • window size is hard-coded (ideally it should scale automatically based on its content)
  • or at least hard-code the window height properly (menu-bar height is not fixed which breaks it, see the little white strip at the bottom)
• implement the rest of rules that can end the game
  • win on time (when timer is implemented)
  • threefold repetition
  • fifty-move rule
  • dead position