Maintains a move history to handle the fifty-move rule and the threefold repetition rule. For the first rules, we just maintains one move count per series of move which doesn't eat a piece or move a pawn. For the second rules, we use two strategies, a fast but unreliable one and a second slower but exact. A. Use two 16KB table of counter address by table[Zobrist key of the board mod 16KB]. Collision can occurs so its only a good indication that the board can be there more than 2 times. B. Keep a compressed representation of the board in an array to be able to count the number of identical boards. View code on GitHub

public sealed class MoveHistory

public sealed class MoveHistory

Public NotInheritable Class MoveHistory

Public NotInheritable Class MoveHistory

public ref class MoveHistory sealed

public ref class MoveHistory sealed

[<SealedAttribute>]
type MoveHistory =  class end

[<SealedAttribute>]
type MoveHistory =  class end