Obi-Wan Kenobi (ANH) Respect Thread

Recently, I've gathered several sources for the ultimate Obi-Wan Kenobi Respect Thread. Given how there was so much information on his, I've split it into three parts: TPM Obi-Wan Kenobi Respect Thread and RotS Obi-Wan Kenobi Respect Thread. This is the third and final part, the ANH Obi-Wan Kenobi Respect Thread, where I'll take into account every feat Kenobi has from RotS to ANH. With that out of the way, respect A New Hope's Obi-Wan Kenobi:

Accolades

Despite his old age, Obi-Wan Kenobi is still formidable in his use of Form III:

Even in his elder years, Kenobi remains a formidable Form III practitioner.

Source: Insider 62: Fightsaber

Obi-Wan Kenobi's mastery of Soresu is so great that Darth Vader was unable to break through it:

During the fateful duel with Darth Vader aboard the Death Star, the tall and powerful Sith Lord cannot break Obi-Wan's defenses until Kenobi voluntarily yields.

Source: Insider 62: Fightsaber

Darth Vader considers Obi-Wan Kenobi the greatest Jedi and the danger he presents to the Empire must not be underestimated:

"If you're right, he must not be allowed to escape."
"Escape may not be Obi-Wan Kenobi's intention," Vader replied, struggling to control his emotions.
"He is the last of the Jedi-and the greatest. The danger he presents to us must not be underestimated-yet only I can deal with him." His head snapped around to stare fixedly at Tarkin.

Source: A New Hope novel

Valor

Force Valor is the ability that allows a Force user to increase their speed/strength/durability.

Obi-Wan Kenobi continued his Jedi exercises and didn't allow his reflexes to get dull:

It was fortunate for Ben that he had continued his Jedi exercises on Tatooine, that he had not allowed his reflexes to become dull.

Source: The Life and Legend of Obi-Wan Kenobi

Obi-Wan Kenobi executes moves of incredible swiftness for his age:

Executing a move of incredible swiftness for one so old, Kenobi lunged at the massive shape.

Source: A New Hope novel

Obi-Wan Kenobi tanks a kick from A'Sharad Hett, who would grow up to become the powerful Sith Lord Darth Krayt, and then proceeds to dodge his saber throw:

Ben gasped as Hett launched a powerful kick to his midriff. The kick knocked Ben off his feet, and as he fell back through the air, Hett hurled one of his lightsabers at Ben's body. Ben clung tight to his own lightsaber as he twisted his body in midair to avoid being struck by the spinning blade of Hett's weapon.

Source: The Life and Legend of Obi-Wan Kenobi

Obi-Wan Kenobi is unharmed by the pain of A'Sharad Hett's pommle strike:

Hett blocked the strike with his right lightsaber, then threw his left arm forward to smash his other lightsaber's handle into Ben's jaw .
Ben ignored the painful jolt to his head,

Source: The Life and Legend of Obi-Wan Kenobi

Obi-Wan Kenobi kicks A'Sharad Hett hard in the stomach, and does so faster than Hett could use his other lightsaber for an attack:

Ben ignored the painful jolt to his head and reflexively brought his blade up high, forcing Hett to block the blow with his right lightsaber and leaving his own midsection briefly exposed. Before Hett could strike with his other lightsaber, Ben kicked him hard in the stomach.

Source: The Life and Legend of Obi-Wan Kenobi

Obi-Wan Kenobi fights the renowned bounty hunter Boba Fett in unarmed combat, and holds an advantage despite holding back:

Fett was wearing a jetpack, and he soared above to land on the roof only seconds after Obi-Wan. He advanced cautiously, unable to see the Jedi. Obi-Wan activated his lightsaber. He did it so rarely now that he felt a surge of feelings flood him when he did, something close to pain and joy, a remembrance of what it had once meant to be a Jedi. Once he had traveled freely through the galaxy. Now he had to hide what he was. Now all he knew was secrecy and caution.
Blaster bolts suddenly ripped through the dormer, only centimeters from where he waited. Boba Fett was taking no chances.
Obi-Wan didn't move, even though he felt the sear of heat on his cheek.
He heard the footsteps approaching. Just as they reached the corner of the dormer, just when there was only a split second before Fett would see him, Obi-Wan leaped out.
But Fett must have been expecting this. Taking barely a second to aim, he fired the concussion missile in his jetpack.
Obi-Wan felt the shock waves reverberate. He was blown off the roof, his body lifting into the air like a scrap of cloth. He slowed down the moment, looking for a way to land that wouldn't involve smashing into the permacrete rising toward him.
He reached for the grapnel line on his utility belt. He sent it flying as he fell, the hook catching on the edge of the roof. He bounced in the air, hard, wrenching his shoulder as he quickly swung himself back up. He hit the roof and kept going, charging at Fett, his lightsaber glowing. He severed Fett's blaster rifle in one clean stroke.
Obi-Wan had nowhere to go as Fett suddenly slammed into him, wrapping his arms around the Jedi's body, knocking away his lightsaber, and propelling him backward, trying to push him off the roof. Instead of trying to break Fett's grip, Obi-Wan seized his arms, and the two men shot off the edge, spinning in midair. The crowd below saw them now and gasped.
The two bodies fell through the air for several long seconds before Fett activated his jetpack. As he fired his thrusters, he maneuvered the jetpack so he could slam Obi-Wan against the side of the building repeatedly. Obi-Wan felt the blows shudder through his bones.
Fett reversed and came at the building again. Obi-Wan saw the solid duracrete zooming toward his face. He called on the Force to help. He would need it. At the last moment, he drew his legs up and kicked out. The jolt radiated up through his skull. They spun out, and Obi-Wan used the opportunity to loosen Fett's hold. He dropped, gathering the Force to ease his landing and recapture his fallen lightsaber.
He didn't injure himself, but the pain that traveled up his legs told him that his push off the wall had cost him. Spectators scattered as he rose to his feet. Boba Fett was coming after him, relentless.
Ferus ran through the crowd. Obi-Wan felt the Force surge in warning as another cannon blast from D'harhan leveled part of the hangar.
Ferus was blown back by the blast. D'harhan kept coming. Boba Fett was gathering himself for another assault. Obi-Wan charged forward, grabbed Ferus, and pulled him to his feet.
"Come on," Obi-Wan urged. He hadn't come this far to lose Ferus now.
He helped Ferus stumble past the rubble and leap into the half-demolished hangar. Massive doors were on the other end, firmly shut tight. D'harhan and Boba Fett followed through the opening, blocking any way out.
Obi-Wan and Ferus were trapped.
...
Fett and D'harhan didn't give them a chance to form a strategy. The bounty hunters were all movement, D'harhan passing Fett a blaster so they could both fire at will. The air filled with debris and smoke.
"I wish I had a lightsaber," Ferus muttered as he and Obi-Wan dived for cover behind a large ship awaiting repair. He had turned in his lightsaber when he'd left the Order. "Now would be an excellent time to draw yours, Obi-Wan."
Still, Obi-Wan waited. He and Ferus settled back against a large repair console filled with tools. He saw the smoke curl from D'harhan's head, and he knew the laser cannons had overheated. Boba Fett's blaster fire couldn't penetrate the ship. They were safe for the moment.
But only for the moment. Obi-Wan scanned the hangar. Despite D'harhan's incredible firepower, he knew Fett was the greater threat. Of the two of them, Fett had the cunning.
Above, struts held the roof in place. A series of arcing flexible durasteel supports crisscrossed the high space. Half of the roof had been blasted off when Fett had fired the concussion missile.
The support arches would be an excellent place to stage a battle. Fett had his jetpack, but D'harhan would be at a disadvantage. He would have to remain on the ground.
Obi-Wan pointed with his chin. "Can you make it?" he asked Ferus, indicating the gridwork above.
Ferus grinned. "Can a bantha fly?"
"Actually, no."
"You're such a stickler for details, Obi-Wan."
Suddenly, the Force surged, and Obi-Wan heard a slight whine. D'harhan had released another blast from his laser cannon. The cruiser under repair suffered a direct hit. Flames blew back toward Obi-Wan and Ferus, and they leaped to avoid them.
It was just what Boba Fett was waiting for. Obi-Wan's lightsaber danced, deflecting the bounty hunter's blaster fire as Obi-Wan leaped to safety on a strut high above. Ferus landed on a ship next to the now-destroyed cruiser, then used the momentum of his jump to make a second leap, calling on the Force this time. He sailed into the air, his fingertips grazing the lowermost beam. Obi-Wan saw panic in his eyes. He reached down and grabbed Ferus's wrist, then hauled him up.
Boba Fett moved quickly, activating the propellants on his jetpack and zooming into the air, firing as he came. Deflecting the bolts, Obi-Wan took up the rear as he and Ferus raced to the roof opening.
Ferus had his own crude weaponry to employ. He reached into his pocket, then tossed something at Fett, a shining disk that spun in a clean line, straight toward him. Fett dodged, but the disk hit his armor near the shoulder, searing a crack into the surface. Obi-Wan realized that Ferus had filled his pockets with the round laser cutting blades that fit into a servocutter tool. He tossed another and another, and Fett had a hard time dodging them. With every burst from his jetpack, he zoomed perilously close to the beams.
Silently congratulating Ferus for his inventiveness, Obi-Wan reversed course and charged toward the careening Fett, swinging his lightsaber over his head as he ran. He pinpointed the bolts that held the sheets of durasteel in place for the roof, hitting each one with a quick, cutting touch in a careful pattern. Now all D'harhan had to do was cooperate.
The cyborg was nothing if not predictable. Obi-Wan saw his laser cannon revolve as it followed him. The red tracking light began to pulse.
Boba Fett instantly knew what was going to happen. Obi-Wan saw a new urgency in his attempts to dodge Ferus's spinning laser cuttings as he dove down to stop D'harhan.
He was too late. The cannonfire streaked toward them. Obi-Wan had anticipated it and swung on a beam, flying through the air toward the rear of the hangar. Ferus was close on his heels.
The firepower ripped into the roof where Obi-Wan had been. The bolts had all been cut by the lightsaber on this particular panel, and the thin durasteel peeled back like the rind of a fruit, falling toward the floor below.
Boba Fett made it to safety, but D'harhan was caught. The falling durasteel panel hit him squarely on the back, crashing him to the ground and pinning his legs.
Obi-Wan and Ferus dropped to the floor below. Swinging his lightsaber, Obi-Wan advanced on Fett. Ferus took shelter behind the various ships, trying to get behind Boba Fett so they could corner him. With D'harhan temporarily out of commission, this would be their best chance to stop Fett.
Unfortunately the damage had not gone unnoticed by the spaceport security. A fight among pilots was one thing, property damage another. Suddenly speeders soared into the space, piloted by security officers armed with blaster rifles. Fett was their first target, and they headed for him. The bounty hunter now had his hands full as he turned to meet their assault.
With a quick swipe, Obi-Wan destroyed the control panel on D'harhan's laser cannon. The cyborg's usual smile was now a grimace. His expressionless voice was hoarse. "You think you've won, don't you. But we don't lose. One day you'll be another Jedi prisoner on Coruscant. Malorum has his ways."
Blaster fire suddenly ripped into the ground next to them. More security officers had arrived.
"Don't move," an amplified voice said.
As Ferus joined them, D'harhan's grin grew wider. "Now we'll all be in prison together."
Ferus leaned down. "We're not going anywhere with you, you slab of circuit parts."
...
Boba Fett had escaped to his ship.
Credit to i_like_swords for the quote

Source: The Last of the Jedi: Dark Warning

Darth Vader knows that if his attention falters, Obi-Wan Kenobi would kill him in an eyeblink:

Should his attention falter, Obi-Wan could kill him in the blink of an eye.

Source: Death Star

Telepathy

Telepathy allows a Force user to manipulate ones mind, or to exercise telepathic communication.

Mind Trick

A telepathic power that allows a Force user to mentally influence a target.

Obi-Wan Kenobi performs a Mind Trick on two Stormtroopers:

Obi-Wan Kenobi fools two Stormtroopers into hearing a noise:

Using the Force, Ben flexed his fingers and gestured at the two troopers. Both troopers suddenly heard - or thought they heard - a muffled explosion from the doorway behind them, and turned away from the power terminal.
"What was that?" asked the second trooper.
"That's nothing," said the first trooper. "Top gassing. Don't worry about it."

Source: A New Hope Junior Novelization

Sense

This ability allows a Force user to sense different things through the Force.

Obi-Wan Kenobi senses the destruction of Alderaan lightyears away:

Obi-Wan Kenobi senses that Darth Vader is on the Death Star:

Obi-Wan had already known Vader was there, of course. The Force swirled about the two of them, forging a link impossible to miss.

Source: Death Star

Sound mimicry

This ability allows a Force user to mimic the sounds of other things.

Obi-Wan Kenobi scares away Tuskens by making himself sound like a krayt dragon:

Telekinesis

Telekinesis is the basic capability to manipulate objects through the Force.

Obi-Wan Kenobi disables blasters with the Force:

Obi-Wan Kenobi throws several large rocks. Then he pulls a man towards a speeder and proceeds to slam down the top of the speeder on him:

Obi-Wan Kenobi slams one man down, then disarms the other:

Obi-Wan Kenobi ragdolls a thug:

Obi-Wan Kenobi disarms A'Sharad Hett with telekinesis:

But in the end, Ben knew he wasn't fighting for his own life. He was fighting for Luke's .
Quickly raising his left hand, Ben used the Force to push out at Hett, shoving him back through the air as Ben's lightsaber swept up and through Hett's right arm. Hett shouted as his arm fell away from his body. As Hett stumbled back, Ben used the Force to tear Hett's other lightsaber from his left hand's grip. Both of Hett's lightsabers deactivated as they sailed past Ben and landed in the sand behind him.

Source: The Life and Legend of Obi-Wan Kenobi

Combat skill

Obi-Wan Kenobi fights with A'Sharad Hett. Despite the fact that Kenobi wasn't as experienced as Hett when it come to fighting on sand, had Hett use desperate tactics like cheapshot him by clouding his vision with sand, and holding back until the end, Obi-Wan manages to defeat Hett through use of telekinesis:

"I cannot permit that," Ben said as he drew his light-saber. "You were a great Jedi, Hett, and the son of a great Jedi, but you have given yourself over to revenge. It stops here." Ben ignited his lightsaber.
"You will have a Jedi funeral, Master Kenobi," Hett said. "That I promise."
Hett's hands dropped to his belt and the two light-sabers practically leapt into his gloved hands. He ignited both weapons at once, unleashing their identical green energy beams. He swung fast with the lightsaber in his right hand but Ben blocked it. The lightsabers sizzled loudly as they clashed.
It was fortunate for Ben that he had continued his Jedi exercises on Tatooine, that he had not allowed his reflexes to become dull. He did not think about how long it had been since he had last used his lightsaber in combat. Nor did consider that he was older than Hett by at least a decade, or Hett's considerable skills with his own weapons, and that the Tusken was far more experi-enced at fighting in the desert. Ben knew that any such thoughts would probably only get him killed.
As prepared as Ben was for many things, he was not ready to die. Not yet. Not today.
Hett brought his other lightsaber in at a sharp angle, forcing Ben to lurch back. Ben gripped his own weapon with both hands as he swung at Hett's legs, but Hett blocked the swipe. There was another loud sizzle as the blades dragged across each other.
Ben gasped as Hett launched a powerful kick to his midriff. The kick knocked Ben off his feet, and as he fell back through the air, Hett hurled one of his lightsabers at Ben's body. Ben clung tight to his own lightsaber as he twisted his body in midair to avoid being struck by the spinning blade of Hett's weapon. The moment Hett's lightsaber whipped past Ben's head, Hett used the Force to retrieve it, drawing it back to his waiting left hand.
As Hett caught the lightsaber, Ben rolled up from the ground and swung out again. Hett blocked the strike with his right lightsaber, then threw his left arm forward to smash his other lightsaber's handle into Ben's jaw .
Ben ignored the painful jolt to his head and reflex-ively brought his blade up high, forcing Hett to block the blow with his right lightsaber and leaving his own midsection briefly exposed. Before Hett could strike with his other lightsaber, Ben kicked him hard in the stomach.
Hett grunted, but he didn't go down. He lashed out again at Ben, kicking up sand as he moved in for the kill. Not one of the mounted Tuskens so much as flinched as they watched the duel, nor did they rally for their chief. They merely watched in silence, waiting for the outcome.
Ben blocked each blow, but he wasn't doing it with ease. Hett was far more experienced at fighting on the sand and in the desert heat. Ben knew that his opponent would never surrender, let alone withdraw. As much as he hoped to avoid killing Hett, he also knew that they couldn't keep fighting indefinitely.
But in the end, Ben knew he wasn't fighting for his own life. He was fighting for Luke's .
Quickly raising his left hand, Ben used the Force to push out at Hett, shoving him back through the air as Ben's lightsaber swept up and through Hett's right arm. Hett shouted as his arm fell away from his body. As Hett stumbled back, Ben used the Force to tear Hett's other lightsaber from his left hand's grip. Both of Hett's lightsabers deactivated as they sailed past Ben and landed in the sand behind him.
Hett crumpled to his knees. His tribesmen watched as Ben stepped forward, leaned down to grip the top of Hett's facemask, and then pulled the mask off his head.

Source: Life and Legend of Obi-Wan Kenobi

Obi-Wan Kenobi stalemates Darth Vader, one of the most powerful Sith Lords in history and was even stated to be so skilled that Vader couldn't break his defense:

There would be no reasoning here, Kenobi knew. Igniting his saber, he assumed the pose of warrior-ready, a movement accomplished with the ease and elegance of a dancer.
Rather roughly, Vader imitated the movement. Several minutes followed without motion as the two men remained staring at each other, as if waiting for some proper, as yet unspoken signal.
Kenobi blinked once, shook his head, and tried to clear his eyes, which had begun to water slightly. Sweat beaded up on his forehead, and his eyelids fluttered again.
"Your powers are weak," Vader noted emotionlessly. "Old man, you should never have come back. It will make your end less peaceful than you might have wished."
"You sense only a part of the Force, Darth," Kenobi murmured with the assurance of one to whom death is merely another sensation, like sleeping or making love or touching a candle. "As always, you perceive its reality as little as a utensil perceives the taste of food."
Executing a move of incredible swiftness for one so old, Kenobi lunged at the massive shape. Vader blocked the stab with equal speed, riposting with a counterslash that Kenobi barely parried. Another parry and Kenobi countered again, using this opportunity to move around the towering Dark Lord.
They continued to trade blows, with the old man now backing toward the hangar. Once, his saber and Vader's locked, the interaction of the two energy fields producing a violent sparking and flashing. A low buzzing sound rose from the straining power units as each saber sought to override the other.
...
Illuminated by the flare from contacting energy fields, Ben Kenobi and Darth Vader were backing toward the bay. The fight attracted the attention of others beside the Senator. Every one of the guards moved in for a better view of the Olympian conflict.
Kenobi heard the approaching commotion and spared a glance back into the hangar. The squad of troopers bearing down on him was enough to show that he was trapped.
Vader took immediate advantage of the momentary distraction to bring his saber over and down. Kenobi somehow managed to deflect the sweeping blow, at once parrying and turning a complete circle.
"You still have your skill, but your power fades. Prepare to meet the Force, Obi-Wan."
Kenobi gauged the shrinking distance between the oncoming troops and himself, then turned a pitying gaze on Vader. "This is a fight you cannot win, Darth. Your power has matured since I taught you, but I too have grown much since our parting. If my blade finds its mark, you will cease to exist. But if you cut me down, I will only become more powerful. Heed my words."
"Your philosophies no longer confuse me, old man," Vader growled contemptuously. "I am the master now."
Once again he lunged forward, feinting, and then slashing in a deadly downward arc with the saber.
It struck home, cutting the old man cleanly in half. There was a brief flash as Kenobi's cloak fluttered to the deck in two neat sections.
But Ben Kenobi was not in it. Wary of some trick, Vader poked at the empty cloak sections with the saber. There was no sign of the old man. He had vanished as though he had never existed.
The guards slowed their approach and joined Vader in examining the place where Kenobi had stood seconds before. Several of them muttered, and even the awesome presence of the Sith Lord couldn't keep a few of them from feeling a little afraid.

Source: A New Hope novel

"I've been waiting for you, Obi-Wan. We meet again, at last. The circle is now complete."
Vader raised his weapon to attack, and Obi-Wan matched his pose.
"When I left you, I was but the learner; now I am the Master."
"Only a master of evil, Darth." With that, Obi-Wan stepped in and cut.
Vader blocked the attack easily. Obi-Wan attacked again, and again, Vader blocked each strike.
If the old man thought he could rattle him by attacking instead of defending, he was mistaken. Vader riposted, sped up his timing, and took the initiative, forcing the erstwhile Jedi to defend.
He still had some skill, his old Master did, but he was out of practice. Vader could feel it through the Force.
Obi-Wan twirled and blocked a slash, then wove a defensive pattern with his blade. The Force was still with the old Jedi; he was able to anticipate Vader's strikes and block or parry them. But after a quick exchange, Vader felt the energy shift in his favor. "Your powers are weak, old man."
There had always been in Vader a small bit of worry about this day. Not much; just a trace. He had been sure, in his useful arrogance, that he had been stronger, had been better than the Jedi Knight who had been his teacher, and the memory of what Obi-Wan had done to him would never be erased. He had been a superior fighter even when he had been Anakin Skywalker, and yet Obi-Wan had defeated him.
Could he win now?
It was as if the old man could read his thoughts:
"You can't win, Darth. If you strike me down, I shall become more powerful than you can possibly imagine."
Vader knew that Obi-Wan was taunting him by using the Sith honorific, but he would not allow himself to be baited. Obi-Wan lunged again, attacking, but Vader was ready. Their sabers clashed, sparks spewed, the stink of ozone wafted over them, but Vader stood his ground. The blades slid along each other's length, then stopped, bound together in the magnetic handle guards, the men face-to-face.
Vader shoved, hard, and they broke the clash. Obi-Wan retreated a step.
Vader felt the fierce anticipation of victory pound in his heart. "You should not have come back," he told the old Jedi.
Another exchange - four, five, six attacks and blocks - and Vader knew the old man was weakening. The Force might be strong in Obi-Wan, but the dark side was stronger in Vader. It let him anticipate his adversary's strikes and counter them almost before they began.
Obi-Wan knew it, too. He began a retreat, backing away, his lightsaber itself seeming weaker as he moved.
Vader backed Obi-Wan past an open blast door leading to the forward dock where the Rebel freighter was being held under guard. The old man was obviously tiring.
You're mine, old man, Vader thought.
But just as he was ready to deliver the final strike, Obi-Wan managed a fast series of attacks, and Vader had to move quickly to avoid the strikes. Even as old and weak as Obi-Wan was, his technique was accomplished enough that a foolish move on Vader's part could still be fatal.
A group of stormtroopers standing in the dock became aware of them. Vader felt rather than saw them notice the strange duel, and sensed the troopers heading toward them.
He did not wish them to interfere, but to even warn them of would take concentration that he could not afford at the moment. Should his attention falter, Obi-Wan could kill him in the blink of an eye.
Vader heard someone call from the dock: "Ben?" It was a young man's voice. Still he could not risk a look in that direction. But Obi-Wan glanced away, quickly, then looked back at Vader. Then he did the last thing Vader could have possibly imagined -
He smiled.
It was an expression not the least worried; almost beatific, in fact. Then, still smiling, Obi-Wan lifted his lightsaber so that the tip pointed straight up at the ceiling.
The action was so totally unexpected that Vader paused for an instant in shock. Not even the Force had lent him prescience concerning this. His former Master had left himself wide open. Was it a trap?
It didn't matter. If it was, Obi-Wan wasn't fast enough, or strong enough, to spring it in time. Vader shifted his lightsaber and cut from the right, hard, aiming for the neck -
His lightsaber sheared through the old man as if the latter were no denser than the air itself, and Obi-Wan collapsed.
Yes! Fierce, exultant joy coursed through the man who had been Anakin Skywalker. He had done it! He had slain Obi-Wan Kenobi! His revenge was complete!
From a distance he heard someone scream "Nooo!" - a cry of utter despair. But Vader paid it no heed. The dark side surged within him as powerfully as he had ever felt it - for an instant. But then it stopped.
What had just happened?
Vader looked down at the body. But there was no body. Only Obi-Wan's robes and cloak.
This was impossible! It could not be!
The squad of stormtroopers began firing at somebody in the docking bay, but Vader could not be bothered to look. He stepped forward, staring down in disbelief. An illusion of some kind? Some Jedi mind trick that the old man had never imparted to him?
Impossible! Obi-Wan had taught him everything Vader knew...
But, whispered a voice from within, maybe not everything that Obi-Wan knew.
Vader reached out with his boot to touch the corpse, but he only stirred the empty vestments, charred by the lightsaber's heat, with his questing foot.
Obi-Wan Kenobi was gone.
How could this be?
For the first time he could remember, the dark side had no answer. And a great surge of unfamiliar emotion suddenly washed over him.
Darth Vader, the Dark Lord of the Sith's apprentice, one of the two most powerful beings in the galaxy, was afraid.

Source: Death Star

During the fateful duel with Darth Vader aboard the Death Star, the tall and powerful Sith Lord cannot break Obi-Wan's defenses until Kenobi voluntarily yields.

Source: Insider 62: Fightsaber