If you’re looking how to beat heroic Karazhan Chess Board boss on the first wing of the adventure One Night in Karazhan, this video from AAsmodeus takes you through it.
The chess board battle is an interesting and fun battle. You don’t get to choose a deck, instead you’re using chess pieces.
This video shows you what pieces you need to start with, how and where to place them for optimal play, and how to beat this incredibly difficult boss level.