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Every time you play a hand differently from the way you would have played it if you could see all your opponents' cards, they gain; and every time you play your hand the same way you would have played it if you could see all their cards, they lose. Conversely, every time opponents play their hands differently from the way they would have if they could see all your cards, you gain; and every time they play their hands the same way they would have played if they could see all your cards, you lose.
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Can anyone please tell me how do you play your hand as if you knew the Villain´s cards
since such a thing you just DON`T know, you can only put him in a range of cards based on previous action/tells of any sort and then narrow that range based on his next moves.