Originally posted by kamikz
I agree with the points, but are you sure that Soresu is only good against blasters? I thought that was just one of the KOTOR balancing things for the different styles. Obi-Wan has actually never been bested in ROTS in saber combat, when he fought Dooku it was with the force + that Obi-Wan was actually using offensive to work as a team with Anakin instead of being defencive, I'd say it's pretty well effective with saber vs saber too....
It IS effective for being purely defensive (Like with Grievous), but that's not its main focus.
Form III
The third great lightsaber discipline was first developed in response to the advancement of blaster technology in the galaxy. As these weapons spread widely into the hands of evil-doers, Jedi had to develop unique means of defending themselves. Form III thus arose from "laserblast" deflection training. Over the centuries it has transcended this origin to become a highly refined expression of non-aggressive Jedi philosophy. Form III maximizes defensive protection in a style characterized by tight, efficient movements that expose minimal target area compared to the relatively open style of some of the other Forms.
Obi-Wan Kenobi takes up a dedication to Form III after the death of Qui-Gon Jinn (who favored Form IV), since it was apparent to Kenobi that Jinn's defense was insufficient against the Sith techniques of Darth Maul. True Form III masters are considered invincible. Even in his elder years, Kenobi remains a formidable Form III practitioner.
Author Dr. David West Reynolds and fencer Jack "Stelen" Bobo derived the "in universe" principles of lightsaber combat based on the action that appears in all five Star Wars films to date. An importance notice to the reader: these Jedi histories are not stunt choreographies nor intructions from Episodes I and II Stunt Coordinator Nick Gillard, who developed the exciting sequences we see on screen. Do not attempt fencing without proper safety precautions and training.
See this article and other exciting information in Issue 62 of Star Wars Insider.
Here's the original excerpt on Form III from the creators. The only problem with the description is it claims Obi-Wan, being a master of Form III (Which is verified all over the board) would ideally be invincible. But that's not the case as we see in ROTS; true, he does put up the best defense possible against Grievous and later on with Anakin he holds up where most would fall... but I believe the claim of "A true master would be invincible" is an unsubstantiated claim. Obi-Wan is invincible in the face of superior firepower (Just watch AOTC where he combats the deadly Jango Fett and Slave I, or in ROTS where he effortlessly deflects blasts from all manners of droids, but in lightsaber combat his form is ineffective at gaining the advantage. He can only hold on until an opportunity arises itself, leaving the effectiveness of this form mostly up to the form and style of the opponent. For example, Dooku can tear right through this because his form IS made for saber to saber, while Obi-Wan's is primarily for blasterfire. Likewise, Mace Windu would tear right through it. Yoda would tear through it too. But this isn't a flaw in the master- it's a limitation of the form itself. Likewise, the only time Obi-Wan beat Anakin was when he was fully on the defensive and Anakin was foolish.