v1.8

Adding the chessmodels.SliceBoard structure; optimization.

Change Log

• new features:
  • the chessmodels.BaseBoard structure that stores a board size;
  • the chessmodels.SliceBoard structure:
    • rename the chessmodels.Board structure to chessmodels.MapBoard;
    • add the chessmodels.SliceBoard structure;
    • add the chessmodels.SliceBoard structure to the go-chess-perft tool;
    • make the chessmodels.Board type redirect to the chessmodels.SliceBoard structure;
  • transform the Pieces() methods of the chessmodels.MapBoard and chessmodels.SliceBoard structures to an independent function;
  • the chessmodels.Size structure:
    • add the PositionIndex() method;
    • add the PositionCount() method;
    • add the IteratePositions() method;
• refactoring:
  • optimize memory allocations;
• unit testing:
  • slightly improve the tests of the chessmodels.MapBoard structure:
    • of the Piece() method;
    • of the ApplyMove() method;
  • add the benchmarks based on the chessmodels.Perft() function:
    • for the chessmodels.MapBoard structure;
    • for the chessmodels.SliceBoard structure.

Features

• representing the board:
  • as an associative array of pieces with their positions as keys;
  • as a plain array of pieces with exact correspondence array indices to piece positions;
• immutable applicating moves to the board via copying the latter;
• checkings of moves:
  • universal;
  • individual for all types of pieces;
• generating moves via filtering from all possible ones;
• perft function;
• using an abstraction of a piece;
• Forsyth–Edwards Notation:
  • parsing:
    • of a position;
    • of a move;
    • of a piece kind;
    • of a piece color;
    • of a board;
  • serialization:
    • of a position;
    • of a move;
    • of a piece kind;
    • of a piece color;
    • of a board;
• utilities:
  • utility for counting all possible moves (based on the perft function).