The first one in the lower left corner is black. When the first hand hits A 16, white A 15 and black B 14. Since then, 82 whites have promoted their third son, 63 blacks have left, 6 1 white, A 14 black, A 16 white and B 13 black.

The upper left corner is black first, and the black can be set in A2.

Black moves first in the upper right corner, and R5 moves first. If Bai raised Black's second son in Q6, Black will live again in R3. If the white dot is R3, it is black Q6, and a son who eats white 16 will live. 16 cannot be blacked out directly. If black is mentioned first in Q5, it is white in Q6. Then R5 and R3 are either white or black. You can't see black directly on R3. If it is, it will be dark at R5.

The lower right is black first, and the first hand is O 19. After that, if you eat M 18 for free, then take S 18 for black. When lifting N 19 in white, R 19 in black survived. After the black side passes through O 19, if the black side is broken at S 18, the black side is longer than M 18 and still alive. When it's black 0 19, it's not as white as R 18. If it is black, it is black. After that, either jump at S 18 position or do more at M 18 position, black.

The key to these four questions is to know how to abandon your children.