Tried something different on this one.
I isolated PSums 8,9,10 with their corresponding 8PSum.

That showed. 8 Pairsum hit back to back. Removed 8 2/2...

Was left with this. Even sum @ 4 hits , I played odd sum. 8PSums 2nd digit 1 @ 4 hits. Lead me to play 9 1/2 , L3

winner
