It doesn't exist a win-win situation between two adversaries but only one winner or two losers.
You have to choose
you want to be
winner or loser!
How can do it?
If you are sure to win, go on straigth to the goal but always thinking how your adversary could turn the situation around to his favour!
If you are sure that you can't have any chances to win the exit way is to involve another player... the third part can be the critical solution to rock the boat to your favour!