It's strange b/c:
1. Elder Kurong is an old, wise Buddhist monk. Why would he bother with trivial worldly affairs like this? What was Wuyazi thinking?
2. After all, Wuyazi was looking for a young & handsome man to become his heir. Elder Kurong is as far as you can get from this criterion.
3. Even if Elder Kurong solved the chess game, would anyone expect him to obey Wuyazi's upcoming demands?
Someone (or was it me?) had suggested maybe there's some history about Elder Kurong that Wuyazi knows, that we don't know about.