So they got those flashlight thingies and jedi powers of mind control, and they can move things, so they're telekinetic and they hover on their jet saucers over molten lava, and they can jump and fly like they're in Cirque du Soleil™. But what gives one jedi knight the edge over the other, huh? The ultimate advantage? They stand on a mound of dirt and declare, "you can't win. I've got the high ground." He's four feet up a little slope! And that wipes out the others guys' powers to fly, jump around, move things round with his brain, use his flashlight thingy?

This has been buggin' me.

All the other guy has to do is scurry up the hill and run up a bit, and then HE has the high ground. They can fly jet pods but they can't scurry?

You think Obi-Wan would let Anakin make the short jump to the shore and strafe around him? If Anakin tried to sidestep him he'd just follow and block that way too. Anakin's only option was to try and jump over him or surrender.

As to why he couldn't jump over him, Obi-Wan had been in the same position before (Episode I) and won because of it. He undoubtedly has gone over the scenario countless times, probably even as a way to teach other Jedi the dangers of it. By Episode III, he would be a master of the ins and outs of the maneuver and know exactly how to counter it.

There are many faults with the prequels, but this isn't one of them