What needs to happen Sunday for Lewis Hamilton to be guaranteed winning the F1 Drivers Championship?

May be...

He's five points ahead of Massa so all he needs is to score six more points than the Brazilian to increase the lead to 11 and Massa will not win the championship even if he wins in Brazil.

he needs to finish 6 points ahead of Massa, and within 1 point of Kubica. This will ensure he is at least 11 points ahead going into the last race.

Maximum point for a victory is 10 points. Hamilton is 5 points ahead now. So he will need to outscore Massa by 6 points this weekend to put the result beyond doubt.

An example would be if he wins (10 pts)in Shanghai and Massa is placed 5th (4pts). If Hamilton is 2nd (8pts) then Massa must be 7th (2pts). If Hamilton is 3rd (6pts), then Massa must finish out of the points.

And he really needs to keep his cool.

It needs to rain lol

Нет,Льюис РЅРµ станет чемпионом РІ этот СѓРёРєСЌРЅРґ.Скажу вам больше Масса Рё Льюис РІ пылу Р±РѕСЂСЊР±С‹ РјРѕРіСѓС‚ отдать чемпионский титул Кубице,то жэ может произойти Рё СЃ РєСѓР±РєРѕРј конструкторов,РЅРѕ это ужэ мало вероятно.Р–РґС'Рј интересной Рё увлекательной РіРѕРЅРєРё РЅР° гран-РїСЂРё Китая.

He needs Raiki tae finish 2nd to Massa,in both races.
I take it you are a Loser Hami fan,I would like it if Vettel had the same calibre of car as the top teams,no matter what that has been the best thing that's happened since Schumacher left.

If Massa doesn't finish then Hamilton needs to score 6 points or more, so 3rd place or better.

Massa crashing into Kubica would be nice for Lewis!

I am pretty sure this will go down to the last race and Massa will score more than Hamilton in China and so it will be very close and very exciting!

Hamilton needs a wet race!

(If Hamilton scores 5 points that gives him a 10 point lead. If Massa wins in Brazil and Hamilton scores 0, then Massa would still win the title although equal on points, he's won more races)

Hamilton needs to score 6 points more then Massa, and no more then 2 less then Kubica. There are lots of different ways that this could happen:

If Hamilton wins, he will be champion as long as Massa doesn't finish in the top 4.

If Hamilton finishes 2nd, he will be champion as long as Massa isn't in the top 6.

If Hamilton finished 3rd, he will be champion as long as Massa doesn't score and Kubica doesn't win.

That's it basically. It will likely go down to the final race, unless Massa has a problem of some kind.

Based on last year, I just cannot see Hamilton finishing the race, and if he does, it will be behind Massa.
As I see it, he went into the last race thinking "I must win ... I must win ..." instead of thinking "I have won ... I have won ....". I'm afraid Ferrari out thought Lewis, and I think all the lectures from Ron will mean very little.gresham hyde park hotel london uk