The first thing that needs to be remembered when identifying what split you have is to make sure that you have a split. There are two criteria that must be set in order for what you have to be a split.

1. The one pin or head pin must NOT be present.

2. There needs to be at least two pins left standing that would not be adjacent to each other and there are not pins left standing that could connect them. For example, the 5 pin in the above diagram would be adjacent to the 2, 3, 4, 6, 8, and 9 pins. So, if you left the entire back row( 7, 8, 9, and 10) that would not be a split even though the 7 and 10 are not adjacent to each other. This is because the 7 and 10 are still connected through the 8 and 9. If either the 8 or 9 were gone, then you would have a split.

Now, the naming of splits is fairly simple. Once you have determined that you have a split, all you do is start with the lowest number of pins left standing and count upwards including only the pins left standing. So, if you left the 4, 7 and 10 pin, this would be called a 4-7-10 split.