5.k15 is exactly what I'd hoped you would play, though I didn't really think you would. As you saw, it's easily defended with 6.l127.j138.i11. If |7.m14, then 8.o13. I think I'd have played |5.i14
Too close to the left border for 9.d11 to be successful -- at least, absent any supporting pegs (eg, H13).
5.k15 is exactly what I'd hoped you would play, though I didn't really think you would. As you saw, it's easily defended with 6.l12 7.j13 8.i11. If |7.m14, then 8.o13. I think I'd have played |5.i14
Too close to the left border for 9.d11 to be successful -- at least, absent any supporting pegs (eg, H13).
After 11.n14 12.m15, I think |13.r16 would have been better.