private void UpdateState(Move move, ulong startSquare, ulong endSquare)
{
var newState = GameStateMutator.ApplyMove(CurrentState, move, startSquare, endSquare);
var opponentPieces = (endSquare & newState.Board.WhitePieces) != 0
? newState.Board.BlackPieces : newState.Board.WhitePieces;
newState = AnalyzeAndApplyState(newState, endSquare, opponentPieces);
CurrentState = newState;
CurrentTurn = opponentPieces;
History.Push(newState);
}
private static bool WillMovePlaceKingUnderAttack(GameState state, ulong square, ulong targetMove)
{
// Try the move and see if it lands in check
// TODO: Use a stateful 'squares attacked by' approach to do this better
var newState = GameStateMutator.ApplyMove(state, square, targetMove);
var newBoard = newState.Board;
var ownPieces = (newBoard.WhitePieces & targetMove) != 0 ? newBoard.WhitePieces : newBoard.BlackPieces;
var opposingPieces = newBoard.AllPieces & ~ownPieces;
var opposingAttack = GenerateSquaresAttackedBy(newState, opposingPieces);
var isKingUnderAttack = opposingAttack & (ownPieces & newBoard.Kings);
return(isKingUnderAttack != 0);
}