Well Sire Ernie15, it had to be a well placed pebble to clip the head of the sentry and kill the king so, while you are on that theme, this is some work in progress (WIP).
Simply use a small stone/pebble and kill the king in this bloated albeit nearly circular castle. It should be easy or is it? My other version has a princess launching out of the circle of death only to meat her own demise. I will fix that soon so that you can never find her - she is quite the clever escape artist as you know. The sentry flip is quite unique - he is a most unstable person! Too much boiled meat I suppose! I like the fighting soldier the best, he can slide down turrets!
Weapons - pebble
Shots - 1 for gold
Tis easy sire Ernie - save, copy and show me (as you are the master of flips) how to get a princess alive out of this hole! I like your idea for the competition.
I will just change my submission (to the game), to be submissive and submit.
Here is one pebble for death of the king