Problems of briv (19)

17201 life and death 14493 life and death 14073 life and death 14003 best move 13763 tesuji 13386 endgame 13099 life and death 13066 tesuji 12050 tesuji 12022 best move 11934 life and death 11908 life and death 10943 tesuji 10761 best move 10720 life and death 10714 life and death 10695 life and death 10689 life and death 10270 life and death