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Winning the play offs means winning 2 out of 3 games. I think Derby will win the play offs and we stand a slightly better chance of making automatic.
So ideally we need Middlesbro to win all of their games bar against us and we aim for 2nd and forget 1st place, all really hypothetical as no team will win all their games and not drop a point.
What you are missing is that apart from us beating the teams above us they will be also playing each other so maximum points for all teams apart from against us is not possible.