sounds confusing to me so ill put a simple example up ok im going to assume you dont know how to set a multi board up so im going to show that too you first
Events
Time - Elapsed game time is 0.10 seconds
Conditions
Actions
Multiboard - Create a multiboard with 2 columns and 2 rows, titled Kills
Multiboard - Set the display style for (Last created multiboard) item in column 0, row 0 to Show text and Hide icons
Multiboard - Set the text for (Last created multiboard) item in column 1, row 1 to Red
Multiboard - Set the text for (Last created multiboard) item in column 2, row 1 to (String(RedKills))
Multiboard - Set the text for (Last created multiboard) item in column 1, row 2 to Blue
Multiboard - Set the text for (Last created multiboard) item in column 2, row 2 to (String(BlueKills))
ok now the get the (string(redkills)) you have to when you go to edit the text of the multiboard column you have to use on the the presets in this case i used integer to string
ok next is updating the board this is for red killing a unit
Events
Unit - A unit Dies
Conditions
(Owner of (Killing unit)) Equal to Player 1 (Red)
Actions
Set RedKills = (RedKills + 1)
Multiboard - Set the text for (Last created multiboard) item in column 2, row 1 to (String(RedKills))
pretty simple eh?