Everyone stands in lines (one behind the other) in a row - maximum 9 lines Each line gets a number 1-9 The person at the front calls out two digit numbers If they call out a number where they’re both the same, that row has to jump and say ‘bov’ E.g. if they say 33, line 3 has to jump If they call out a number where they’re different, those rows have to swap E.g. if they say 47, lines 4 and 7 switch places They then take on the other number, so line 4 would now become line 7 and have to jump if 77 was called If anyone in a line makes a mistake, that line is out of the game