public Grid Next(IEnumerable<IRule> rules)
{
var newCells = new List<Point>();
for (var x = 0; x < Size; x++)
{
for (var y = 0; y < Size; y++)
{
var point = new Point(x, y);
var lives = rules.Any(r => r.Apply(point, Cells.Contains(point), point.LivingNeighbors(Cells)));
if (lives)
{
newCells.Add(point);
}
}
}
return new Grid(newCells, Size);
}