matevito / chess

Chess game using ruby!

Chess is a two-player board game played in a grid of 64 squares (8x8). This game is performed using ruby and runing directly from the terminal. If you wonna know more about the game check the chess page in wikipedia.

Notation format

The notation format that this program uses is bases on algebraic notation. Each move consist of two parts: 1) the first points to the current piece that the current player wants to move. Each of the pieces of the game mantain the letters used in algebraic notation(king:K, knight:N, bishop:B, etc.) and then is represented in minor case the cell the piece is currently placed(e4, a1, h8, etc.). The pawns just require the current cell they are placed. 2) the second part represents the cell where the piece is going to be moved (h7, b3, I think you kinda get the idea.).

As a summary, the format can be resumed in the following way: "[current_cell][-][cell_to_move]". THe only exception about this notation is in castle that uses the normal algebraic notation: "o-o" (castle in king side) and "o-o-o" (castle in queen side). Also, is not necessary to put explicitly that the move performed is taking a rival piece. Examples:

Ka1-a2 (King from a1 to a2).

b3-b4 (pawn b3 to b4).

o-o-o (queen side castle).

How to play?

Run from the terminal the main.rb file. THen just follow the instructions that show the terminal and try not to perform illegal moves in the game.

Game features

1. Performs a game of chess in the terminal with two human player (localy).
2. Save and load games that have been played in the program(does not read games in algebraic notation).
3. Prevents players from making illegal moves.
4. Declares check, checkmate and stalemate.
5. The board printed in the terminal uses the uni-code chess symbols.

Things yet to do

1. A method that print in the terminal all the moves performed in the game
2. Declare stalemate in repetitions of cases.
3. Add images to the readme.
4. Go deeper in the readme. This means, explain better how to play and how to perform the diferent game options like load and save game.