public ISet <IAction> Actions(object state)
{
NQueensBoard board = (NQueensBoard)state;
ISet <IAction> actions = new HashedSet <IAction>();
var numQueens = board.GetNumberOfQueensOnBoard();
var boardSize = board.Size;
for (var i = 0; i < boardSize; i++)
{
var newLocation = new XYLocation(numQueens, i);
if (!(board.IsSquareUnderAttack(newLocation)))
{
actions.Add(new QueenAction(QueenAction.PlaceQueen,
newLocation));
}
}
return(actions);
}
