for intentional walks, the umpire should hold a bullseye type dart board. the pitcher has to throw at it 4 times, if he misses the whole board once the batter takes 2nd. also it's a live ball and any runners can advance. if he hits the bullseye on 3 throws, the batter is out. if he hits the board on 4 of 4, but doesn't get 3 bullseyes, the batter advances to first.