Spock/Relationships/Friendships/Leonard McCoy

The relationship between Spock and Dr. Leonard McCoy seemed a little strained at times on McCoy's part because of his taunts about Spock's green blood and lack of emotion. However, there was an obvious respect and friendship among James T. Kirk, Spock, and McCoy. McCoy, in fact, was one of the two friends Spock requested to join him in his marriage ceremony. ()
While he would rarely do so without provocation, Spock was also quite capable of turning the tables on the doctor. During Kirk's court-martial, after an astonished McCoy discovered him in the briefing room playing chess against the ship's computer, Spock casually allowed him to assume the worst (to the point of thanking him after the furious doctor had said he was "The most cold-blooded man I've ever known"), waiting until he reached the door to reveal that he had been victorious in four consecutive games – since the computer, whose account of the incident was the main evidence against Kirk, was programmed to be unbeatable, this proved that it had been tampered with (something only Kirk, Spock, and the "dead" Commander Finney were authorized to do), and cast doubt on the credibility of its account, keeping the trial going long enough to discover that Finney was, in fact, alive. 
Later that year, after the Enterprise crew had defeated the androids on planet Mudd (beings almost Vulcan-like in their lack of emotion and their "logical, pragmatic" thinking), McCoy told Spock that he must be quite unhappy to see that "poor, illogical" Humans were able to fairly defeat them, Spock responded that this was quite satisfactory, as nobody needed him and his logical ways as much as a ship full of Humans. ()