What are the meaning to these showjumping events?

Question

AM5 AM6 AM7 Power And Speed

please let me know

Answer 1

I'm not completely sure, but my best guess would be that they are Amateur Level 5, 6 and 7 (that's 4', 4'3, 4'6)

Power and speed is a format where the course is usually 14-16 jumps long. The first 7-9 jumps are the "power" phase, where the object is to go clean. IF you are clean in the power phase, you continue the course, starting the "Speed" phase. (if you're not clean, you don't continue the course). The timers start after jump 9 (for example) and then the object is to complete the rest of the course as quickly and cleanly as possible. Class is scored on faults, then speed.

From the USEF rule book:

c. Table II, Sec. 2 (c)—Two Phase Competitions - The first round and first jump-off, if any, are decided by adding together the faults incurred over the course and any penalties for exceeding the Time Allowed if any. If a competitor has gone clean in the first round, he will, upon crossing the finish line, commence the designated jump-off course. Time starts as the horse crosses the finish line for the initial course. If there are no clean rounds and a tie exists for first place, there will be one jump-off, in which time will decide in the event of equality of faults. The use of a Time Allowed is optional in the first round. The Time Allowed in the first round may be taken by electronic or manual means.