posetcay: The problem originally did not have the K12 stone, I added it myself because I think the problem is unsolvable without it. If you find a solution without the K12 stone, please let me know.
Sadaharu: Removing the K12 stone, how do you answer J14 or J15?
@Sadaharu: J15 seems to work even without the K12 stone, thanks for pointing it out, I updated the solution.