Sidious would slaughter him. Tbelow is a reason yoda saw face sidious and also not Obi-Wan despite Obi-wan asking Yoda to sfinish him to kill the emperor.
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"Send me to kill the Emperor. I will certainly not kill Anakin."
"To fight this Lord Sidious, solid enough, you are not."
- Obi and also Yoda
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Why bump this?
"Send me to kill the Emperor. I will not kill Anakin."
"To fight this Lord Sidious, strong sufficient, you are not."
- Obi and Yoda
Obi-Wan should win in a possibly decent fight. To the crmodify of his unmatched protective abilities, he"s shown the capacity to deflect blaster fire from militaries on multiple occasions (Republic, Labyrinth of Evil, Revenge of the Sith). Against other significant duelists, he was able to parry Dooku"s Makashi flourishes effortlessly in the RotS novelization, react to all of dark sider-Anakin"s powerhome blows on Mustafar, and also withstood Grievous" four-bladed attack. Palpatine has never before prcooktop the capacity to deflect a flurry of assaults of the magnitude Obi-Wan has actually tackled prior to, Obi-Wan turned aside Anakin"s "meteor strike" force blows which exceeds Palpatine"s, and also Sidious" Lightning would be captured on his blade, just choose Dooku"s was.
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On the subject of power, Obi-Wan was taken out by Dooku through TK in RotS, however Dooku didn"t control to carry out this instantly. Obi-Wan flinched as Anakin was knocked ameans from the exreadjust, and also the unrelenting attack on Dooku paused. Had that not happened, Tyranus wouldn"t have been able to defeat Obi-Wan in this manner. On optimal of that, it"s unlikely Sidious is capable of TKing Obi-Wan level Force masters mid-duel anymeans, seeing as he failed to versus Mace, Kit, Saewatch, and also Agen. Worrying speed, Maul and Savage were able to store up with Sidious" pace in a duel before; so it have to hardly be difficult for Obi-Wan to replicate that offered his wealth of outstanding rate feats.