The heavily favored San Francisco 49ers swept to a 49-26 victory over the San Diego Chargers in Super Bowl XXIX yesterday in Miami, extending the National Football Conference's Super Bowl domination to 11 straight victories, this one by a margin that made the latest triumph more rout than ritual.

The 49ers, favored by as many as 20 points, jumped to an 18-point lead in the first half (28-10) and led by as many as 31 points in the second half, coming within a touchdown of matching the team's own Super Bowl record of 55 points, set in 1990.

The Chargers, making their first Super Bowl appearance and sentimental favorites to pull off the game's greatest upset, were simply outclassed as the 49ers became the first team to win five National Football League championships since the Super Bowl was started in 1967.

From the moment Jerry Rice caught a 44-yard touchdown pass from Steve Young on the third play from scrimmage, giving San Francisco the quickest score in Super Bowl history, the Chargers were doomed.