I can't figure out some stratego ice vs fire rules 1 how many spaces are the forbidden zones 2 can elves shoot over traps this would break the game 3 What if an elf shoots a flag?

1.They are 2x2 or 4 squares.
2.Yes elves can shoot over anything and no it will not break the trap because all it is is a crack in the ground.
3.If a elf shoots the flag then nothing happens but then they know where the flag is.