Problems of ldan (15)

13306 life and death 11151 life and death 9563 tesuji 9258 endgame 9239 best move 9238 life and death 9221 tesuji 9219 tesuji 9217 tesuji 9139 best move 8906 endgame 8819 life and death 8806 life and death 8761 life and death 8760 life and death