As can be seen from the title, from the perspective of mistress chess pieces, it is a cycle of four chess pieces: one black chess piece and three white chess pieces.

Then the solution should be:

70- 1=69

69÷4= 17…… 1

That is, in addition to the first white chess, there are 17 black, white, white and white cycles, and the last 69 divided by 4 leaves 1, which is the black chess at the beginning of the last cycle.

So the number of black chess is: 17+ 1= 18.

The number of white chess is: 1+ 17×3=52.

Of course, the number of white chess can also be obtained from 70- 18=52.