Experts' Tier R1: In a fair fight, Mace Windu would likely defeat Yoda.

Yoda's Force Abilities While pro asserts that Mace Windus' greater range of force powers puts him at an advantage against Yoda, I shall assert that this is not a valid point. During the First Battle of Geonosis Yoda and Count Dooku face off, and even though Dooku is a skilled master of telekinesis and a Sith lord, thereby giving him an even greater range of abilities than either Yoda or Mace Windu, Count Dooku realizes that he cannot win against Yoda and flees the building (and the planet) [1][2]. Next, pro asserts that Mace Windu's ability to create a force loop gives evidence to Mace Windu being the superior force user. What should be noted here is that this is not a use of the force, but a use of Mace Windu's lightsaber abilities [3]. Secondly, never is it mentioned what the level of difficulty required to redirect such Sith lightning. Such an ability could have just been a biproduct of the electrically charged Sith lightning with the ionized gas (plasma) of the lightsaber blade in combination with the short distances between the blade and Darth Sidious's face. Yoda's Lightsaber Abilities While pro asserts that Yoda is not a master of all forms, as I stated in the second round, Yoda is in-fact a master of all forms of lightsaber combat, but he prefers to use Form IV: Ataru [4]. While Yoda is not a master of the Vaapad subset of form VII, he is a master of the original version of this known as Juyo, with Mace Windu mastering the newer Vaapad subset [5]. Therefore both Jedi have an equal range of lightsaber combat techniques to utilize in combat. Pro then asserts that Yoda's preferences for a form which has known issues puts him at a disadvantage. What should be noted here is that this is a mere preference, and not the only form that Yoda has mastered [4]. There is no evidence to suggest that Yoda would be just as capable with using any of the other lightsaber techniques as he would with using Ataru. Secondly, while pro asserts that Yoda's age would be an issue in prolonged combat, during the Battle of Kashyyyk, Yoda was able to fight "swarms of clone troopers" [6], thereby showing that Yoda is perfectly capable of prolonged combat, and in the cited case, against multiple opponents with ranged weapons. Therefore Yoda's age and lightsaber skills are not disadvantageous to him in a duel against Mace Windu. Yoda's Past Feats While pro attempts to discredit the relevance of Yoda's capabilities as a tactician, I would like to make the point that nobody would rise to the rank of a general in the military without having been on the front lines at one point in time, and shown great aptitude in battle. I highly doubt that Mace Windu would be able to survive twelve tons of rocks falling on him. Such weight is nearing that of all seven Muuntur stones. Only one Jedi ever (which in it of itself may just be a legend) has ever lifted all seven stones at once. While pro asserts that Yoda did not fight very much during the rescue mission on Ilum, Yoda did in-fact destroy dozens of chameleon droids before rescuing the pair. Pro uses an interpretation of an image of three clone troopers standing near Yoda to assert that they gave Yoda invaluable help. While many Jedi survived Order 66, the Order killed at least 13 Jedi masters (this doesn't include people deemed as "Gatemasters", "Battlemasters", or a group of Jedi masters of an unknown quantity) [7]. This shows that such an Order required much skill to escape from. Mace Windu While pro attempts to defend the cause of Mace Windu's death by pointing out that Anakin Skywalker but off Mace Windu's hands, this actually shows a disadvantage for Mace Windu. Anakin Skywalker is not a Jedi Master, he has been defeated by a Jedi knight, and he is already known for using ill-thoughtout impulsive attacks like the one that resulted in Mace Windu's death, the most notable of these being the one that took his hand whilst charging Count Dooku [8]. Lastly, Yoda was unable to get as close to Darth Sidious a Mace Windu did, because Mace Windu fought Sidious in the confined space of a room using their lightsabers, while Yoda fought Sidious on the open ground of the Senate hall, whereby the Force was used at range. 1. starwars.wikia.com/wiki/Dooku#Force_abilities 2. http://starwars.wikia.com... (relevant part near the picture of Yoda and Dooku fighting) 3. http://starwars.wikia.com... 4. http://starwars.wikia.com... 5. starwars.wikia.com/wiki/Yoda 6. starwars.wikia.com/wiki/Battle_of_Kashyyyk_(Clone_Wars)#Order_66 7. starwars.wikia.com/wiki/Order_66#Victims 8. starwars.wikia.com/wiki/Anakin_Skywalker#Battle_of_Geonosis