The National Basketball Association (NBA) Finals is the championship series for the NBA and the end of its postseason. All Finals have been played in a best-of-seven format, and are contested between the champions of their Eastern Conference and the Western Convention (previously Divisions earlier 1970), except in 1950 when the Eastern Division champion faced the winner between the Western and Central Division champions. From 1946 through 1949, when the league was called the Basketball Association of America (BAA), the playoffs were a three-stage tournament where both semifinal winners played each other in the finals.  this series’ winning group receives the Larry O’Brien Championship Trophy.
The present home-and-away format at the NBA Finals is 2–2–1–1–1 (the team with the better regular-season record plays in their home court in Games 1, 2, 5, and 7), which has been utilized at 1947–1948, 1950–1952, 1957–1970, 1972–1974, 1976–1977, 1979–1984, and 2014–present. It was formerly at a 2–3–2 format (the group with the better regular season record plays in their home court in Games 1, 2, 6, and 7) during 1949, 1953–1955, and 1985–2013, at a 1–1–1–1–1–1–1 structure during 1956 and 1971, and at a 1–2–2–1–1 format throughout 1975 and 1978. 
The Eastern Conference/Division directs the Western Conference/Division in series won (39–34). The Central Division, when the then existing Eastern Division was upgraded as a conference, in presence throughout the 1949 — 50 NBA season when the NBA was divided into three branches and separate from the Central Division created in 1970, won one tournament. The Minneapolis/Los Angeles Lakers and the Boston Celtics alone possess almost half of those titles, having won a combined 33 of 73 championships. The defending champions are, as of 2019.
Read more: beltwaytimes.com