protected override Game Replace(int value)
{
var game = new ImmutableGame(this);
game.field.valuesByPoint[GetLocation(value)] = 0;
game.field.valuesByPoint[GetLocation(0)] = value;
game.field.pointsByValue[0] = GetLocation(value);
game.field.pointsByValue[value] = GetLocation(0);
return(game);
}
private ImmutableGame(ImmutableGame game)
{
size = game.size;
field = new Field(game.field);
}