(Elaria POV)
"My cannon takes your chariot and that is checkmate for you."
"Booo!! One more time Onii-sensei!!" I begged, seeing my 'general' cornered for the twelfth time in a row.
I didn't really have high hopes for this game that Onii-sama had introduced to me at first, but now I was starting to see the appeal behind the game.
As simple as it looked, there seems to be a very complex set of rules present behind the game that makes it easy to learn but hard to master.
Little Cai Hong had been so immersed in watching our game that she had already forgotten she still held a cookie in her hand. Master had to prod her a few times to have her continue eating it.
"I see you're getting the hang of it," Onii-sama commented.
He snapped his fingers and all the pieces rearranged themselves back to their original locations, resetting the board for our next game.
What MC did there was the "Sacrifice Horse and Checkmate in 13 moves" in Xiangqi. MC made exactly 13 moves to secure this victory, baiting Elaria to take his horse with her cannon to open up her flank for his own cannon to attack.