:chess_pawn: Chess System in Java :coffee:

Como jogar :video_game:

1. Abra um terminal (Git Bash é o recomendado, pois é colorido)
2. Entre no diretório /bin do projeto, no meu caso ~/eclipse-workspace/chess-system/bin
3. Após entrar no diretório, digite Java application/Program para rodar a aplicação (obs: estou utilizando o Java SE 11)
4. O resultado esperado será esse, conforme o 1° Tela Inicial exibe abaixo:

1° Tela Inicial	2° Selecione a peça origem (Source)	3° Selecione a peça destino (Target)	4° Peça movida, turno/player trocado

5. Observações: :pencil:

• Peças: Peão, Torre, Cavalo, Bispo, Rainha e Rei

Pawn(Peão)	Rook(Torre)	Knight(Cavalo)	Bishop(Bispo)	Queen(Rainha)	King(Rei)
P	R	N	B	Q	K

• A mecânica do jogo é baseada em linhas(1, 2, 3, 4, 5, 6, 7, 8) e colunas(a, b, c, d, e, f, g, h)
• Para escolher uma peça é necessário selecionar primeiramente a coluna e logo em seguida(sem espaços) selecionar a linha, exemplo: c2
• Em Captured pieces o jogo armazena as peças capturadas.
• O Turn exibe o turno(rodada) em que o jogo está.
• Waiting player exibe qual é o jogador a jogar a próxima peça.
• Source é a origem, ou seja, a peça no qual o jogador irá jogar.
• Target é o destino, ou seja, o local no qual o jogador irá mover a peça.
• O jogo possui sistema de Check e CheckMate
• Alguns movimentos especiais:
  • Castling(Roque)
  • En Passant
  • Promotion(Promoção)

Conceitos :pushpin:

First class: Position

Checklist:

• Class Position [public]
• OOP Topics:
  • Encapsulation
  • Constructors
  • ToString (Object/overriding)

Starting to implement Board and Piece

Checklist:

• Classes Piece, Board [public]
• OOP Topics:
  • Associations
  • Encapsulation / Access Modifiers
• Data Structures Topics:
  • Matrix

Chess layer and printing the board

8 - - - - - - - -
7 - - - - - - - -
6 - - - - - - - -
5 - - - - - - - -
4 - - - - - - - -
3 - - - - - - - -
2 - - - - - - - -
1 - - - - - - - -
  a b c d e f g h

Checklist:

• Methods: Board.Piece(row, column) and Board.Piece(position)
• Enum Chess.Color
• Class Chess.ChessPiece [public]
• Class Chess.ChessMatch [public]
• Class ChessConsole.UI
• OOP Topics:
  • Enumerations
  • Encapsulation / Access Modifiers
  • Inheritance
  • Downcasting
  • Static members
  • Layers pattern
• Data Structures Topics:
  • Matrix

Placing pieces on the board

Checklist:

• Method: Board.PlacePiece(piece, position)
• Classes: Rook, King [public]
• Method: ChessMatch.InitialSetup
• OOP Topics:
  • Inheritance
  • Overriding
  • Polymorphism (ToString)

BoardException and defensive programming

Checklist:

• Class BoardException [public]
• Methods: Board.PositionExists, Board.ThereIsAPiece
• Implement defensive programming in Board methods
• OOP Topics:
  • Exceptions
  • Constructors (a string must be informed to the exception)

ChessException and ChessPosition

Checklist:

• Class ChessException [public]
• Class ChessPosition [public]
• Refactor ChessMatch.InitialSetup
• OOP Topics:
  • Exceptions
  • Encapsulation
  • Constructors (a string must be informed to the exception)
  • Overriding
  • Static members
  • Layers pattern

Little improvement in board printing

Color in terminal:

• Windows: Git Bash
• Mac: Google "osx terminal color"

Checklist:

• Place more pieces on the board
• Distinguish piece colors in UI.PrintPiece method

Moving pieces

Checklist:

• Method Board.RemovePiece
• Method UI.ReadChessPosition
• Method ChessMatch.PerformChessMove
  • Method ChessMatch.MakeMove
  • Method ChessMatch.ValidadeSourcePosition
• Write basic logic on Program.cs
• OOP Topics:
  • Exceptions
  • Encapsulation

Handling exceptions and clearing screen

Clear screen using Java:

// https://stackoverflow.com/questions/2979383/java-clear-the-console
public static void clearScreen() {
  System.out.print("\033[H\033[2J");
  System.out.flush();
}

Checklist:

• ChessException
• InputMismatchException

Possible moves of a piece

Checklist:

• Methods in Piece:

  • PossibleMoves [abstract]
  • PossibleMove
  • IsThereAnyPossibleMove

• Basic PossibleMove implementation for Rook and King

• Update ChessMatch.ValidadeSourcePosition

• OOP Topics:

  • Abstract method / class
  • Exceptions

Implementing possible moves of Rook

Checklist:

• Method ChessPiece.IsThereOpponentPiece(position) [protected]
• Implement Rook.PossibleMoves
• Method ChessMatch.ValidateTargetPosition
• OOP Topics:
  • Polymorphism
  • Encapsulation / access modifiers [protected]
  • Exceptions

Printing possible moves

Checklist:

• Method ChessMatch.PossibleMoves
• Method UI.PrintBoard [overload]
• Refactor main program logic
• OOP Topics:
  • Overloading

Implementing possible moves of King

Checklist:

• Method King.CanMove(position) [private]
• Implement King.PossibleMoves
• OOP Topics:
  • Encapsulation
  • Polymorphism

Switching player each turn

Checklist:

• Class ChessMatch:
  • Properties Turn, CurrentPlayer [private set]
  • Method NextTurn [private]
  • Update PerformChessMove
  • Update ValidadeSourcePosition
• Method UI.PrintMatch
• OOP Topics:
  • Encapsulation
  • Exceptions

Handling captured pieces

Checklist:

• Method UI.PrintCapturedPieces
• Update UI.PrintMatch
• Update Program logic
• Lists in ChessMatch: _piecesOnTheBoard, _capturedPieces
  • Update constructor
  • Update PlaceNewPiece
  • Update MakeMove
• OOP Topics:
  • Encapsulation
  • Constructors
• Data Structures Topics:
  • List

Check logic

Rules:

• Check means your king is under threat by at least one opponent piece
• You can't put yourself in check

Checklist:

• Property ChessPiece.ChessPosition [get]
• Class ChessMatch:
  • Method UndoMove
  • Property Check [private set]
  • Method Opponent [private]
  • Method King(color) [private]
  • Method TestCheck
  • Update PerformChessMove
• Update UI.PrintMatch

Checkmate logic

Checklist:

• Class ChessMatch:
  • Property Checkmate [private set]
  • Method TestCheckmate [private]
  • Update PerformChessMove
• Update UI.PrintMatch
• Update Program logic

Piece move count

Checklist:

• Class ChessPiece:
  • Property MoveCount [private set]
  • Method IncreaseMoveCount [internal]
  • Method DecreaseMoveCount [internal]
• Class ChessMatch:
  • Update MakeMove
  • Update UndoMove
• OOP Topics:
  • Encapsulation

Pawn

Checklist:

• Class Pawn
• Update ChessMatch.InitialSetup
• OOP Topics:
  • Encapsulation
  • Inheritance
  • Polymorphism

Bishop

Checklist:

• Class Bishop
• Update ChessMatch.InitialSetup
• OOP Topics:
  • Encapsulation
  • Inheritance
  • Polymorphism

Knight

Checklist:

• Class Knight
• Update ChessMatch.InitialSetup
• OOP Topics:
  • Encapsulation
  • Inheritance
  • Polymorphism

Queen

Checklist:

• Class Queen
• Update ChessMatch.InitialSetup
• OOP Topics:
  • Encapsulation
  • Inheritance
  • Polymorphism

Special move - Castling

Checklist:

• Update King
• Update ChessMatch.MakeMove
• Update ChessMatch.UndoMove

Special move - En Passant

Checklist:

• Register a pawn which can be captured by en passant on next turn
  • Property ChessMatch.EnPassantVulnerable
  • Update ChessMatch.PerformChessMove
• Update Pawn.PossibleMoves
• Update ChessMatch.MakeMove
• Update ChessMatch.UndoMove
• Update ChessMatch.InitialSetup

Special move - Promotion

Checklist:

• Property ChessMatch.Promoted
• Update ChessMatch.PerformChessMove
• Method ChessMatch.ReplacePromotedPiece
• Update Program logic