"Gary Keramidas" <GKeramidasAtMSN.com wrote in message
...
you can put this in B2 and copy down

=IF(A2="","",$A$1-SUM($A$2:$A2))

but i'm not sure what you want when you get to negative numbers because i
don't play darts

I don't think they go to negative numbers because you need an exact score to
go out, ending on a double.