> ...by the way can you construct a situation requiring > three passes?? I suppose this is a three pass position. 6 . . . . . . . . . 5 * * * * * * * * * 4 o o o o o o o o o 3 * * . o . * * * o 2 . o * o * o . * o 1 * * * o * * * * o A B C D E F G H I BR Johan