posetcay:
Posting the previous comment again because the coordinates got messed up: I think it might be better to switch colours and try to live in the bottom right corner. There are at least 10 different moves that kill (P3, P2, Q2, R1, T4, T2, N4 also kill) but only 1 move that lives without ko, which is Q2. If we decide to keep the current version I can add the missing solutions.

posetcay:
I think it might be better to switch colours and try to live in the top right corner (top left orientation). There are at least 10 different moves that kill (Q18, P18, P17, R19, T16, T18, N15 also kill) but only 1 move that lives without ko, which is Q18. If we decide to keep the current version I can add the missing solutions.