The 'battles' will be trying to gain first downs vs the other player's defense (duh).
I want it to feel like a drive, and each play may be quick or take a few back-and-forths playing different cards.
0-3 first downs = punt
4 first downs = field goal attempt
5 first downs = touchdown
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Keeping it simple, there are running plays for no gain, short gain, or long gain.
Passing plays are incompletion, short gain, long gain
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Combinations yielding a first down:
Runs: 3 short gains, 2 long gains, or 1 short + 1 long gain
Passes: 1 long completion, 2 short comps, or 1 short + 1 long comp
Mix: 1 short completion + 1 long run gain OR 2 short run gains, 1 long completion + 1 short or long run gain
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Passes require a dice roll, based on the real-life completion % of the QB. Short passes will have a higher comp %, longer ones a lower %.