idk maybe look for pieces they never take with?? im really bad at this lol
Master Ahab Chess

I think the best way to try to find the royal Ahab is to fork as often as possible. If you fork two pieces, and your opponent moves the one that has a lower point value, than you can almost be certain that you’ve found Ahab. On the flip side, if your opponent wants to do some intensive psychology, then he could do that simply to mislead you.
Anybody got good tips for finding opponents royal?