When

It was like spring in the Back Hill of the Academy, especially near the Mirror Lake. Additionally, the pear tree was not ordinary, so it showed no signs of desolation. It was full of green leaves and gave a cool shade.

People sat under the shade with their eye sights fixed on the chessboard, but still couldn't figure out its specialties or even how to open it.

Mu You flicked her hair with an embroidery needle, looked irate, and said, "Still no clues?"

The Fourth Brother looked at the chessboard, and said seriously, "I thought of seventy three methods, but I don't think they're feasible as the First Brother and Second Brother could have done it."

Mu You said, "We should try them all."

They left the pear tree, came to the water room by the stream, and watched the Fourth Brother as he put the chessboard on the stove. They let it ablate on the blue high temperature flame, and then they looked slightly worried.