I have never been in a WKF tournament, however the AAU uses the same kumite rules. Keep your lead hand down and out infront of you. Your back had up by your chin. This covers more of the scoring zone than having you lead hand up and you back hand down or a boxers stance. From this stance, X block incoming techniques and counter with a backfist - ridgehand with the lead hand, or Side/hook kick with the lead leg.